Indonesia Conference Directory

Corresponding Author
Reza Aryanto

Institutions
1
Program Studi Teknik Pertambangan, Fakultas Teknologi Kebumian dan Energi,
Universitas Trisakti, Jalan Kyai Tapa No.1, Tomang, Grogol Petamburan,
Jakarta Barat, Daerah Khusus Ibukota Jakarta 11440

2
Dosen Program Studi Teknik Pertambangan, Fakultas Teknologi Kebumian dan Energi,
Universitas Trisakti, Jalan Kyai Tapa No.1, Tomang, Grogol Petamburan,
Jakarta Barat, Daerah Khusus Ibukota Jakarta 11440

Abstract
Kedungwaru Village is a village in Karangsambung Subdistrict located at 109 ° 3730 "- 109 ° 4500" BT and 7 ° 3000 - 7 ° 3730 LS. In the long dry season that occurs in the first half of 2018, residents in several areas of Kedungwaru Village complain of drought. Aquifers are a layer of water that can be used as a water source. The study was conducted using a single channel geoelectric instrument with the Vertical Electrical Sounding method with the aim to determine the distribution of aquifers based on the depth and thickness of the aquifer. The depth and thickness of aquifer data are then interpolated using IDW (Inverse Distance Weighted) method to produce depth maps and isopach maps. The results showed that there were two types of aquifers in Kedungwaru Village, namely unconfined aquifers and confined aquifers. The unconfined aquifer located at a depth of 1-3 m from the surface with a thickness varying up to 22 m, while the confined aquifer is at a depth of 13-30 m from the surface with thicknesses varying up to 19 m. From the acquired data, a geological model was created. Keyword: geoelectrical, aquifer, isopach, water source, Kedungwaru

Keywords
geoelectrical, aquifer, isopach, water source, Kedungwaru

Topic
Disaster Management and Environmental Issues

Link: https://ifory.id/abstract/2U6JLqeFvX4w

Corresponding Author
Ady Setya Nugroho

Institutions
Universitas Pembangunan Nasional Veteran Yogyakarta

Abstract
The typical standard geothermal well slotted liner is a 7", research on big hole slotted liner to increase steam production in geothermal fields. In the previous study the potential of geothermal field was 380 Mwe, while currently it has been produced at 39.79 Mwe, so that the field geothermal is feasible to be developed again. The current conditions there are 7 production wells with normal hole (7 "liners) that have been proven to produce continuously in developing this production will be simulated using the big-hole size slotted liner, starting at 8 5/8", 9 5/8 ", 10 ¾ ", 11 ¾", 13 3/8 "16", 20 ". With proven reservoir condition data, the geothermal field is feasible for production studies using big holes. The main parameters include Temperature, Preassure, mass flow and steam quality. The conceptual model is an interpretation of the condition of the reservoir so that the reservoir conditions in the well can be identified as data for the study. WellSim Simulator is used to predict pressure loss in the hole and bottom surface, and vice versa. The output is the pressure, mass flow rate, temperature, dryness and enthalpy of the wellhead so that various casing sizes can be simulated with the condition of the reservoir. The optimal size of the production liner developed in the geothermal field is 9 5/8 ".

Keywords
Big hole; Production; Wellsim

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/K3z2GXBFLxwZ

Corresponding Author
abdul havidz

Institutions
a) Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology. Jalan Ganesha 10, Bandung 40132, Indonesia ; Abdul_havidz[at]students.itb.ac.id
(b) Earth Resources Exploration Research Group, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology. Jalan Ganesha 10, Bandung 40132, Indonesia

Abstract
Citarum is one of the strategic rivers in Indonesia. The Citarum River Basin is the site of 3 large reservoirs that produce 5 billion kwh / year of electricity, equivalent to 16 million tons of fuel / year. Ironically, in recent years, Citarum has become the center of attention of various parties. This is because the Citarum River was named one of the dirtiest rivers in the world along with 10 other rivers in 2013. In terms of restoring the Citarum River, not only the Citarum River water needs to know its condition, but the condition of each tributary which empties into The Citarum River and the condition of groundwater around the river also need to be known. In this study, 43 samples were taken consisting of Citarum River, tributary and shallow groundwater from upstream in Situ Cisanti to Saguling Reservoir. The samples were analyzed by physical parameter test, Ion Chromatography test, and ICP-MS test. This test is carried out to test certain chemical compositions in the sample. From the results of this study it can be concluded that: 1) Generally there is a change in hydrogeochemistry conditions in the Upper Citarum area which is characterized by an increase in the number of dissolved ions in the Citarum River flow from upstream to downstream. The concentration of dissolved ions passed the threshold in almost all sampling locations, namely nitrite and fluoride. 2) The largest source of dissolved ions in the Upper Citarum area, namely the Upper Citarum (Cirasea) sub-watershed, the Cibolerang sub-watershed, and the Citepus sub-watershed. 3) Interaction Shallow ground water and river water namely ground water can pollute river water due to the process of advection and dispersion.

Keywords
Citarum River, tributary, shallow ground water, Upper Citarum

Topic
Disaster Management and Environmental Issues

Link: https://ifory.id/abstract/4W8hwuND9mKY

Corresponding Author
Fefria Tanbar

Institutions
Fefria Tanbar, Eko Widi P, Ady Setya N, Padlil Iswahyu, Arizona Yoris W

Abstract

Keywords
UPN Veteran Yogyakarta

Topic
Make up well, TOUGH2 Simulator

Link: https://ifory.id/abstract/BDq4uwkU68Vh

Corresponding Author
Esha Firnanza

Institutions
a) Lampung University, Engineering Faculty, Geophysics Engineering Department
Jalan Prof. Dr. Sumantri Brojonegoro No.1 Bandar Lampung 35145
*eshafirnanza[at]gmail.com
b) Indonesian Defense University, Defense Management Faculty, Energy Security Department
IPSC Area, Sentul, Sukahati, Citeureup, Bogor, West Java 16810

Abstract
Preliminary survey using refraction seismic method is an important thing to determine boundaries between weathered layer and rigid layer on highway geotechnical survey. The main thing in refraction seismic survey is to do interpretation survey result to accurate subsurface data. This research conducted subsurface velocity modeling using refraction seismic tomography. The purpose on this research is to make 2D velocity model to determine and analyze boundaries between weathered layer and rigid layer lithology for highway construction corresponding to ASTM D 5777 standard on each line from FRMLN field consist of line E2, E3, E4, and E5. Acquisition data using generalized-reciprocal method with several processing data stages consist of static correction, filtering, gain, first-break picking, inversion and tomography modeling. Based on modeling result, there is two kind of weathered layer lithology and three kind of rigid rocks lithology on research location. Weathered layer lithology consist of top soil in velocity 0-375 m/s and weathered layered (soil) in velocity 750-1125 m/s, while rigid rocks lithology consist of tuff in velocity 1500-1875 m/s, silicic tuff in velocity 2250-4125 m/s, and andesite in velocity more than 5250 m/s. Identified layer which occur a weathering in LINE E2 had a thickness variation around 2-6.3 meter, LINE E3 had a thickness variation around 1-5.6 meter, and LINE E5 had a thickness variation around 1-4 meter from surface.

Keywords
Geotechnical, generalized-reciprocal method, tomography, tuff, weathered layered (soil).

Topic
Geophysics,Geomatics and Geochemistry

Link: https://ifory.id/abstract/RP7g9tHedYDL

Corresponding Author
Diah Rini Ratnaningsih

Institutions
Universitas Pembangunan Nasional Veteran Yogyakarta

Abstract
The governments policy in the food sector is to achieve food self-sufficiency in the context of national food security, whose priority is in the form of partiality to farmers to improve welfare. This policy cannot be felt yet by the farmers who live in Tayuban village, Panjatan Subdistrict, Kulonprogo Regency, because there are still obstacles in its implementation. The problem faced by farmers in this village in increasing crop production is the lack of availability of water sources for irrigating secondary crops, especially in the dry season. The lack of water availability causes plant productivity to be low, so that farmers income is low. To overcome the problem of water shortages, a surface geological survey was carried out as a preliminary study to find out the watershed (DAS) and identify the hydrogeological system of the study area. Based on watershed and hydrogeological systems data, in turn engineering can be carried out to meet water supply for irrigated agricultural land.

Keywords
Surface Geological Survey, Hydrogeological

Topic
Geology

Link: https://ifory.id/abstract/dKYFxPDp8wec

Corresponding Author
Aris Buntoro

Institutions
Petroleum Engineering Department, Geological Engineering Department, Faculty of Mineral Technology, UPN "Veteran" Yogyakarta, UTC Pertamina

Abstract
At present, Indonesia has a very large shale hydrocarbon potential, where the Central Sumatra Basin is the biggest potential in Indonesia, especially from the Brown Shale Formation of the Pematang Group. However, the development of shale hydrocarbon in Indonesia is still little studied and poorly understood. Thus, research related to non-conventional hydrocarbon resources is very important in order to improve sustainable national energy security. But further research must be carried out using analog outcrop data, because there is no data core from the Brown Shale Formation of the Pematang Group. Fortunately, there are currently very good analog outcrop at the PT. Karbindo in Kiliran Jao, West Sumatra. In this paper the sweetspot fracable window is determined by using a geomechanical analysis approach from core / analog outcrop samples, so that the prospect formation interval model with a high fraction can be created, which correlates with fracture resistance, and can be applied to determine the location and planning interval for hydraulic fracking. From the sweetspot fracable window of shale hydrocarbon, it is expected to increase success in producing shale hydrocarbons which have very low permeability by determining the exact location and hydraulic fracking interval, so that natural cracks can be opened, and the fracture is connected to maximize hydrocarbon flow.

Keywords
fracable

Topic
Geology

Link: https://ifory.id/abstract/9m7tzQWMLYuh

Corresponding Author
Sugeng Raharjo

Institutions
1. Student of Doctoral Programe of Geological Engineering UPN "Veteran" Yogyakarta
2. Geological Engineering UPN "Veteran" Yogyakarta

Abstract
Tanjung Formation is an Eocene - Oligocene coal carrier formation. This formation is stratigraphically situated above the bedrock of Pratersier age. The location of this formation is in Binuang area, South Kalimantan approximately 20 km northwest of Banjarbaru city. The method of research by taking the Channel sampling from the bottom seam to the top. Laboratory analysis is done in the form of coal petrography analysis and adsorption test. Coal seam of Tanjung Formation is found with thickness 50 to 350 cm. Megascopy, this coal seam is black, bright (bright-bright banded), black scratch, concoidal shards, and lightweight. Based on facies interpretation with the Tissue Preservation Index (TPI) - Gelification Index (GI) method, seam B coal depositional environment in fen stage and seam C coal is in the depositional environment at the stage of wet forest swamp. Coal facies analysis based on the Ground Water Index (GWI) - Vegetation Index (VI) type of peat on coal seam B and C shows in the bog-ombrotrophic zone. Based on the analysis of gas adsorption shows from the lower coal seam to upper with the range 426 - 502 SCF / Ton. The upper coal seam B of the small gas adsorption while at the lower of coal seam C is large gas adsorption. This change in gas adsorption is caused because the upper coal seam B has a depositional environment (facies) at fen stadium conditions , While the coal seam at the bottom (seam C) of the depositional environment (facies) at the stage of wet forest swamp. The difference in depositional environment affects the absorption of coal methane gas.

Keywords
TPI, GI, GWI,VI, adsorption, coal facies, Tanjung Formation

Topic
Geology

Link: https://ifory.id/abstract/3parPcnJNb8y

Corresponding Author
Rani Kurnia

Institutions
1 Petroleum Engineering Study Program, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung
2 Chemistry Study Program, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung

a)Corresponding author: ranikurnia[at]gmail.com
b)tmarhaendrajana[at]tm.itb.ac.id, c)deana.wahyuningrum[at]gmail.com, d)abdassah[at]tm.itb.ac.id,e)zetanurmuhammady[at]gmail.com,f)puspaserunina[at]gmail.com

Abstract
Sulfonated Alkyl Ester (SAE) surfactant is an amphoteric surfactant that has sulfonated groups and ester groups as its hydrophilic groups. This surfactant is expected to reduce the interfacial tension between waxy oil and brine for its application in surfactant injection to improve waxy oil recovery. In this study, the mixture of SAE and a nonionic surfactant Fatty Ester Oxide (FEO) with certain ratio, hereinafter referred to as SAE-01B, showed a better performance than SAE and FEO surfactants in term of lowering interfacial tension between waxy oil and water, resistance to salinity, and microemulsion formation. This study shows that SAE-01B able to provide good performance for its applications in surfactant injection to improve waxy oil recovery.

Keywords
EOR, Surfactant, Sulfonated Alkyl Ester

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/dMAzrKQnGvtF

Corresponding Author
Ratna Widyaningsih

Institutions
a) Petroleum Engineering, UPN "Veteran" Yogyakarta, Jalan SWK 104 Lingkar Utara, Yogyakarta 555283
*ratna.widiyaningsih[at]upnyk.ac.id

Abstract
KA oil field is located in Sumatera Basin. It has been produced oil since 1937 until now. Because of its long production time, KA field can be called by Mature field. From the beginning production period (1937-1995), the KA field produced about 19.97MMSTB with the recovery is about 35%. Oil production was continued by applying water injection in 1995 until now. Based on PBLB Field case (Yosaphat et al, 2017), almost oil resources which was estimated by volumetric method can be produced throughout the drainage of production well covers whole reservoir. KA field has a long production time which is proportionate to total drainage. The MBE method will be applied in this mature field case study to estimate the OOIP. This field case study is expected to prove that OOIP estimation by MBE method will approach the value of OOIP estimation by volumetric with longer production time. This study aim is analyzing the relationship between MBE-s straight line Havlena-Odeh method to total drainage area and production time in OOIP estimation. With the longer production time, The OOIP value from MBE method is estimated will approach the OOIP value by volumetric method.

Keywords
OOIP ; material balance ; well drainage ; mature field

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/RHw3adj7yB28

Corresponding Author
Yosaphat Sumantri

Institutions
UPN "veteran" Yogyakarta

Abstract
KA oil field is located in Sumatera Basin. It has been produced oil since 1937 until now. Because of its long production time, KA field can be called by Mature field. From the beginning production period (1937-1995), the KA field produced about 19.97MMSTB with the recovery is about 35%. Oil production was continued by applying water injection in 1995 until now. Based on PBLB Field case (Yosaphat et al, 2017), almost oil resources which was estimated by volumetric method can be produced throughout the drainage of production well covers whole reservoir. KA field has a long production time which is proportionate to total drainage. The MBE method will be applied in this mature field case study to estimate the OOIP. This field case study is expected to prove that OOIP estimation by MBE method will approach the value of OOIP estimation by volumetric with longer production time. This study aim is analyzing the relationship between MBE-s straight line Havlena-Odeh method to total drainage area and production time in OOIP estimation. With the longer production time, The OOIP value from MBE method is estimated will approach the OOIP value by volumetric method.

Keywords
Material Balance, Havlena-Odeh, Mature Fields

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/FcCtyBZbVjmh

Corresponding Author
Pantjanita Novi Hartami

Institutions
Trisakti University,

Abstract
The selection of appropriate rock support system in accordance with rock properties and rock mass classification should be applied to get the underground mine stability. Underground gold mine of Pongkor Indonesia use friction bolt (split set) and H-beam. For efficiency of rock support system, it is planned to replace the previous rock support system with Mechanical Anchor Bolt as an alternative rock support system. The trial of Mechanical Anchor Bolt was conducted on Cross Cut 519 to Southern on Kubang Kicau vein. The lithology of location dominantly consists of andesite tuff, tuff breccias and quartz veins. The mapping of geological structure was applied to obtained the structural condition. In line with the scanline, the laboratory testing is also carried on in order to get the physical and mechanical properties of rock. By using Rock Mass Classification and the viability index wedge analysis, the technical performance of both supporting was compared and evaluated. The duration of installation of Mechanical Anchor Bolt is observed during the trial and its was compared to previous supporting system. Numerical modeling using Dips, Un-wedge and Examine are applied to model the underground stability. Based on the trial results, the use of Mechanical Anchor Bolt was evaluated to be applied in production stope (Ciguha Flat Back 475 and Gudang Handak Sill Drift Vein C Ramp Down Connect 450) and development access (Pasir Jawa Access Ramp Up to South)

Keywords
friction bolt, H-beam, mechanical anchor bolt, rock mass classification, numerical modelling

Topic
Mining and Metallurgy Engineering

Link: https://ifory.id/abstract/fKtwBhjcz2kC

Corresponding Author
Imam Setiaji Ronoatmojo

Institutions
1Faculty of Earth Technology and Energy, Trisakti University
Jl. Kyai Tapa No.1, Jakarta, Indonesia
2PT. Pertamina EP, Menara Standard Chartered No 164, Lt 16, Jl. Prof. DR. Satrio, Jakarta 12950, Indonesia
email address: aji.rono[at]trisakti.ac.id

Abstract
The tectonic mechanism is a mechanism that involves tectonic conditions in the area which affects the dynamics of poroelasticity. Elastic modulus in the porous medium will go through change along with fluid dynamics. The loading factor role in the tectonic mechanism is followed by the tectonic forces. The aim of this study is to learn the impact of a tectonic mechanism on the coupling ratio during production and water injection. The objective zone of this study is a part of the thrust fault regime, which is changed to be the strike-slip fault regime. The sand reservoir of Z-600 is in the transition condition so that the dominance of S_V and S_hmin has a strong influence on a coupling ratio change. The fluid dynamics occurring during this period are water injection and oil production. Observations were made on mechanical properties and pore pressure changes. The coupling ratio estimation starting from 1994 until 2017 refers to a historical production matching to demonstrate rock strength responses in the variation of existing tectonic regime positions. Mohr diagram analysis was done, based on the Coulomb failure criterion. It demonstrates that pore pressure change is not always equal to the change of stress difference or deviatoric stress change, due to the nature of irreversible porosity change during fluid dynamics. The horizontal stress might cause shear tensile failure, it initiates a sanding problem potential.

Keywords
tectonic mechanism, coupling ratio, rock strength, shear-tensile failure, sanding problem

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/m7XJzFp82kZt

Corresponding Author
Andry Prima

Institutions
UNIVERSITAS TRISAKTI

Abstract
Over the past several five (5) years, a series of refinery unplanned shutdowns was highlighted as headlines in many Indonesian chronicles. The unplanned shutdowns apparently and obviously led to divers array of questions. One of the questions is whether or not the latest and most advance technology is applied that might cause a temporary disruption of oil supply. Furthermore, other questions the human resources. Are they readily adaptable to the fast-paced changing industrial environment? Is the performance of the past contribute to the discovery of overlooked information. Last but not least, the expectation for the management to fully execute a sound strategic business plan. This particular study is approached by using the qualitative non-linear multivariable regression in order to incorporate a number of different categorical variables. In addition, each variable will be analyzed as for the significant contribution to the unplanned shutdown. The result projected to answer the recurring unplanned shut downs; the using a non-linear multivariable regression that incorporates multivariable should be able to explain the undisclosed conditions. In a nutshell , recommendation for improvement is definitely needed. The past performance should be viewed as a lesson learnt for predicting the future operational success.

Keywords
catergorical variable, multi Variable, unplanned shutdown, refinery turnaround, qualitative approach,non-linear multi variable regression, refinery management

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/gDL2rNH6PeKC

Corresponding Author
Aton Patonah

Institutions
(a) Faculty of Geological Engineering, Padjadjaran University, Jl. Raya Bandung – Sumedang KM 21. Jatinangor, 45363, West Java, Indonesia

(b) Research Center for Geotechnology LIPI, Jl. Sangkuriang, Bandung 40135, West Java, Indonesia

Abstract
The mineral chemistry data of three gabbro samples of Ciletuh Mélange Complex (CMC), West Java, Indonesia was determined by JEOL Super probe 733 method. The rock shows phaneritic, intersertal to poikilitic texture, 2 to 8 mm mineral size, have been deformed and auto metamorphism experienced. The gabbro constitutes pyroxene and plagioclase, and least of amphibole (hornblende, actinolite, tremolite) replacing pyroxene, while epidote, chlorite sericite and carbonate replacing plagioclase. The Mg

Keywords
Ciletuh Mélange Complex, gabbro, mineral chemistry, Island Arc

Topic
Geology

Link: https://ifory.id/abstract/AfqkayhnrjDR

Corresponding Author
Akhmad Zamroni

Institutions
(a)(b) Department of Geological Engineering, Institut Teknologi Nasional Yogyakarta
Jl Babarsari, Caturtunggal, Depok, Sleman, Yogyakarta, Indonesia
(c)(e)(f) Department of Mining Engineering, Institut Teknologi Nasional Yogyakarta
Jl Babarsari, Caturtunggal, Depok, Sleman, Yogyakarta, Indonesia
*akhmadzamroni[at]itny.ac.id
(d)Department of Mining Engineering, Institut Teknologi Adhi Tama Surabaya
Jl Arief Rachman Hakim No 100 Surabaya, Indonesia

Abstract
Indonesia is a country that has many coal deposits, especially in Sumatra Island and Kalimantan Island. In both Islands have many coal formations. 8 samples in this study are from three formations, they were Warukin Formation in East Kalimantan, Pengasih Formation in Jambi, and Muara Enim Formation in South Sumatra. The main factor to determine coal qualities is the coal rank. The coal rank from the lowest to the highest are lignite, sub-bituminous, bituminous, and anthracite. The factors that influencing of coal ranks are calorific value, volatile matter, moisture (inherent water), and fixed carbon. One of the influencing factors is geologic history. Geologic history is the key to understanding the story of rocks in the past. The purpose of this study is to review the relationship between coal samples qualities and their geologic histories. The differences in coal ranks of those samples have difference geologic histories. Those factors that influencing of coal ranks are rocks age, depositional environment, temperature, pressure, and recent geologic events.

Keywords
coal, formation, quality, geologic history

Topic
Geology

Link: https://ifory.id/abstract/4mCkFdRtjuga

Corresponding Author
Muchamad Ocky Bayu Nugroho

Institutions
UPN Veteran Yogyakarta

Abstract
The Prambanan and its surrounding area is rich in the ancient relics of Buddhist and Hindu culture, in the form of temples or other forms of heritage. When was observed the distribution of the ancient buildings in this area form a specified pattern, which tends to round or close to the Boko Hills and usually were built on the riverbank. Based on the geological idea, it can be interpreted that the spread of these buildings is influenced by the procurement of source material for its. The Boko Hills composed of polimict breccias; lapilli breccias; pebbly sandstones; tuffaceous sandstones and siltstones, is the nearest location where the materials of the temple was taken, in addition to the rivers that supply the igneous andesite as a product of Merapi-s volcanism. Tuffaceous sandstones; pebbly sandstones and lapilli breccias of the Boko Hill are used for stuffing materials, such as flooring, wall around the temple and small statues. Andesite is used for the main temple building materials, such as walls, walkways and large statues. Key words : Boko Hill, source materials, ancient Hindu and Budha temples

Keywords
Boko Hill, source materials, ancient Hindu and Budha temples

Topic
Geology

Link: https://ifory.id/abstract/buLgFeDzYHMa

Corresponding Author
Jatmika Setiawan

Institutions
Universitas Pembangunan Nasional Veteran Yogyakarta

Abstract
Pendawa hill is located in Jering, Sleman, Yogyakarta. It is one of hill who formed by diorite intrusion (Miocene) and intruded claystone of Nanggulan Formation ages Eocene. In this area will be built a simple housing and that opens some of the western side of the Pendawa hill. So that expose some of the lithology on the Pendawa hill. The beauty of the rare outcrop in the Pendawa hill, Jering, Sleman, than the authors propose that some of the area is preserve to become the geoheritage. Than it will be planned the construction of simple housing are integrated with geological touriem object in this area. For the supporting of the developmnet of simple hausing in this area, so used to arrange of slope stability analisis of all the area who cut of slope.

Keywords
Pendawa hill, simple housing, geoheritage, slope stability

Topic
Geology

Link: https://ifory.id/abstract/KNdmgDhLB4CG

Corresponding Author
Jatmika Setiawan

Institutions
Universitas Pembangunan Nasional Veteran Yogyakarta

Abstract
Matang Keladang Lake in the Tawing Lama Village, Aranio, Banjar District, South Kalimantan is lake on the top of Meratus Mountain. This lake is striking NE-SW and icluding in the ultra mafic lithology at 152-135 years ago. This lake are formed together with Meratus Mountain formed at 150 years ago of collision interaction without the eastern of Sunda Land with Pasternoster micro continent. Juring the collision formed the horst and graben in Meratus Mountain contrlled by strike slip fault and reverse fault with striking NE-SW. One of graben who in fill of rain fall to be formed of Matang Keladang Lake (Raja Lima). The beauty of the Matang Keladang Lake (Raja Lima Lake) among others; the hills in the lake are formed by mafic and ultramafic rocks and not limestone; this lake is in the top of the Meratus Mountains. On some hills inside the lake, grows a very large kayu besi (ironwood) trees specific in Kalimantan. The other beauty, from one of the hills that bordered of the lake we can see sun rice in the morning and sun set in the evening, if the weather is nice. Therefor Raja Lima Lake we can lift it as one of geosite in the South Kalimantan Geopark, and can be developed as a leading tourism object in this Geopark. This is supported by paved roads to the location of the lake and ease of transportation.

Keywords
Matang Keladang Lake, Raja Lima, ofiolite, Meratus, South Kalimantan.

Topic
Geology

Link: https://ifory.id/abstract/tFkpAZP7u4KJ

Corresponding Author
Jeffier Winarta

Institutions
(a) Trisakti University
(b) SKK Migas

Abstract
Lifting activities are the most end activities of the upstream industry, needed a good evaluation for doing those. There is 2 methods in terms of measuring volume; static measurements and dynamic measurements. Static measurement is a measurement of the tank gauging, which is the measurement of the height of oil or liquid in the tank (storage tank or receiver tank), the liquid that will measure in static condition, no changing physics form (temperature or volume) in a long period of time (approximately more than an hour). Dynamic measurement is a measurement of a metering system, which means to do measuring the flowrate (transformation of volume against time) of crude product. the liquid condition with relatively constant speed and pressure, while lifting on loading. commonly, dynamic measurements used flow meters, there are several types of flow meters; positive displacement, turbine, coriolis mass, ultrasonic and orifice. On this occasion, will discuss the two varieties of measurements that is mentioned above, and the differences results among the two method. This paper takes the case in one of the oldest terminals in Indonesia in the Sumatra region of Riau province. During this lifting activity, the difference in values always works in the range of 0 - 0.5%. Not always coming smooth, sometimes there are some lifting activities that have a considerable value difference in both methods more than 0.5%. for additional information, terminal use the flowmeter (Positive Displacement) with automatic and manual mode to generate the results It is expected from this paper, to be able to share experiences in the field in order to guarantee the accuracy of each type of measurement. Not just explain the success, but the failure will show up.

Keywords
Static Measurement, Dynamic Measurement, Positive Displacement, Discrepancy

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/eJV3GCaMYu6H

Corresponding Author
Suryo Prakoso

Institutions
a) Petroleum Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti
b) Geological Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti

Abstract
Several studies show that P-wave velocity are greatly affected by pore geometry and pore structure. Pore geometry and pore structure here are functions of pore attributes. Petrophysical properties of rocks such as porosity are the result of the sedimentation and diagenesis process so that porosity is strongly influence by pore geometry and pore structure. Thus the P-wave velocity should be predicted well by using porosity. This study was intended to apply the concept of critical porosity for P-wave velocity estimation. The data used in this study included porosity from log analysis and DT log data obtained from the Talang Akar formation for validation. By using this method, the P-wave velocity can be accurately predicted.

Keywords
Pore Geometry, Critical Porosity, Pore Structure, P-wave Velocity

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/9y2K8f7hG6Rk

Corresponding Author
Rahmat Catur Wibowo

Institutions
Geophysical Engineering Department, Universitas Lampung
Jl. Sumantri Brojonegoro No.1 Kec. Rajabasa Kota Bandar Lampung, Lampung, Indonesia
*catur3712[at]gmail.com

Abstract
The main workable coal measures are concentrated at two horizons within the Miocene Muara Enim Formations (MEF). The main Coal Bed Methane (CBM) targets are the MEF coals, which are known to have good coal thickness and favorable depth for CBM production. Typically, coals are recognized to thin toward the east as they pinch out against the Sunda landmass. Important elements of the CBM play are coal presence and coal lateral distribution. The objective of this study is to identify thin coal reservoir distribution by using well and seismic data integration. Reprocessing seismic data prior to acoustic impedance (AI) inversion produces better results. In situations where wells are located far from seismic lines, calibration with logs is problematic and inversion produces less than maximum results. Multi-attribute approach can optimize the results. Integration of the filtering, AI inversion, and then multi-attribute & neural network methods produce the best output to identify coal seams, their distribution and continuity. The thickest coal identified well data (10 wells) of 6 m in depth 768 m with a total of 5 layers of coal (seam A, B, C, D, and E) in R5 well. Based on seismic modeling, the seams was only seams A with a total volume respectively 518 million m3.

Keywords
thinned coal, cbm, muara enim formation, seismic modelling, geostatistical

Topic
Geophysics,Geomatics and Geochemistry

Link: https://ifory.id/abstract/uGUaKnVZ7AXF

Corresponding Author
Muhammad Faizal Zakaria

Institutions
1. Teknik Geofisika, UPN "Veteran" Yogyakarta
2. Teknik Geofisika, UPN "Veteran" Yogyakarta
3. Teknik Lingkungan, UPN "Veteran" Yogyakarta
4. Fisika, Universitas Islam Negeri Sunan Kalijaga Yogyakarta

Abstract
Tuk sibedug is a spring located in Seyegan sub-district, Sleman Regency. This spring is never dry even in the long dry season. Myth says that the spring is purified because it was discovered by Sunan Kalijaga during the Islamic dispatch in Java. This study aims to determine the subsurface conditions around Tuk Sibedug and determine the configuration of groundwater systems in these areas. The study was conducted by measuring the geoelectric method of Dipole-dipole configuration. Measurements were made on 3 tracks around the spring with a target depth of about 90 m. The tool used is Syscal Jr Switch-48. The software used is Global Mapper13, Surfer10, Res2dinv3, and Arcgis 10.3. The result interpreted as clay stone, sandstone, and breccia. The clay has the smallest resistivity value ie (3.80 - 9,18) Ohm-meter, sandstone (9,18 - 34,40) Ohm-meter, and breccia (34,40 - 83,10) Ohm-meter. Ground water is stored in sandstone. The type of aquifer is a confined aquifer so it has it own natural pressure to push the water to the surface.

Keywords
Tuk Sibedug, Resistivity, aquifer

Topic
Geophysics,Geomatics and Geochemistry

Link: https://ifory.id/abstract/aM3ECWAcFDh9

Corresponding Author
Suharsono Suharsono

Institutions
Universitas Pembangunan Nasional Veteran Yogyakarta

Abstract
Geological complexity part of South-West of Central Java area becomes an attraction for geologists and geophysicist to conduct details research in this area. An integrated approach of gravity and magnetic interpretation was performed to determine the subsurface geological structure patterns, distribution of sedimentary sub-basin, and basement configuration. Objective of this research is to analyze the depth of basement and describe the illustration of sedimentary rock. Interpretation of basement depth was processed from magnetic data whereas geological structure and sedimentary patterns was analyzed using gravity data. Magnetic Anomaly pattern shows that low intensity of magnetic < 60 nT (yellow – green) is disseminated at West-East of the map where as high intensty magnetic about > 200nT (red-purple) indicates basement rock or intrusive rock. Bouguer anomaly indicates that the area is dominated high anomaly 79.4 – 116 mgal (orange to purple) in west, north and southeast area, while low anomaly 49 – 79 mgal ( blue-yellow) in the middle to northwest of area. Interpretation of magnetic data have guided gravity method in reconstuction basin model especially in basement and intrusive rock. Foreward modelling of regional gravity map has pointed seven Formation with different desities, Tapak Formation; Upper Halang; Lower Halang; Pemali Formation; Gabon Formation; Karangsambung Formation and Basement rock

Keywords
Exploration of oil and gas, Gravity Method, Oil and gas basin, Geological structure

Topic
Geophysics,Geomatics and Geochemistry

Link: https://ifory.id/abstract/NQE4YKcvdbFz

Corresponding Author
Lilik Eko Widodo

Institutions
Research Group on Earth Resources Exploration,
Faculty of Mining and Petroleum Engineering, Bandung Institute of Technolgy, Bandung, Indonesia

Abstract
The cycle time in mining activities is the time needed by a mining equipment or a combination of several mining equipments to complete one or one series of several particular jobs or tasks. The cycle time in some cases will never be constant but follows a certain distribution with an average and certain standard deviation of time. This is due to the fact that each mining equipment and / or each component of the work varies in time to complet the task. The cycle time of some mining equipments and / or some components of work is basically an arithmetic operation of the variation of cycle time of each individual mining equipment with its individual distribution. Arithmetic operation of several data distributions can be done stochastically by using Monte Carlo method or method with fuzzy number operation. This paper will briefly describe the uncertainty analysis of cycle time using both methods and finally comparing the results of both.

Keywords
Cycle Time, Monte Carlo Method, Random Number, Fuzzy Number Operation

Topic
Mining and Metallurgy Engineering

Link: https://ifory.id/abstract/zxvVj73WJpPb

Corresponding Author
Wahyu Sardjono

Institutions
a*,b,c)Information Systems Management Department,
BINUS Graduate Program - Master of Information Systems Management, BINA NUSANTARA University, Jakarta, INDONESIA 11480

Abstract
Indonesia is vulnerable to natural disasters such as: earthquakes, tsunamis, volcanic eruptions, floods, landslides and droughts and forest fires. Geographically, Indonesia is also located on the equator, so this region has a tropical climate. During the rainy season when rainfall is high, this condition triggers tornadoes, floods and landslides. While in the dry season, and low rainfall occurs drought, forest and land fires. While in the transitional season, the natural phenomenon of tornadoes is a threat of disaster. In Law No. 24 of 2007 of the Republic of Indonesia concerning Disaster Management, it is stated that the central government and regional governments are responsible for implementing disaster management, with an emphasis on preparedness and mitigation in the face of natural disasters. However, socialization to the community regarding the two matters is not regulated in the existing law, so that the planning and implementation of the outreach and internalization program must be carried out to the wider community so that natural disaster preparedness and mitigation can be carried out to the maximum. In line with the development of information technology and systems that have entered the era of media convergence, namely the integration of various technology platforms on one media or equipment owned by all levels of society, the acceleration of the process of disseminating preparedness and mitigation can also be done by utilizing these equipment. Using the theory of SECI Model, the development of knowledge management can be implemented to optimize the dissemination and development of data and information about sustainable mitigation activities related to natural disasters. The results of the research are in the form of developing a Knowledge Management System (KMS) for natural disaster preparedness and mitigation that can be used to support the socialization and internalization of disaster preparedness and community-based disaster mitigation activities, including dissemination and measurement of community preparedness and mitigation performance in the face of natural disasters.

Keywords
natural disasters, knowledge management systems, SECI Model, mitigation activities, socialization

Topic
Disaster Management and Environmental Issues

Link: https://ifory.id/abstract/mRPQ2V9XuNwd

Corresponding Author
Syafrizal Syafrizal

Institutions
Earth Resources Exploration Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung, Indonesia

Abstract
Three vein zones hosting gold mineralization have been outlined at the Poboya prospect, named as the River Reef Zone, the Hill Reef 1 Zone, and the Hill Reef 2 Zone. The vein zones were observed within metamorphic rocks leading to an issue regarding classification of the deposit type and exploration of the gold deposit. Macroscopic observation on considerable number of veins collected from the Hill Reef 1 and Hill Reef 2 Zones show that the vein textures consist of massive chalcedony, massive quartz, massive carbonate, banded chalcedony, colloform, crustiform, cockade, and lattice textures. These textures represent primary growth and replacement textural groups, which are similar to the vein textures observed at the River Reef Zone. Accordingly, the gold mineralization at the Hill Reef 1 and Hill Reef 2 Zones can be classified as a low-sulfidation epithermal deposit. In addition, the predominance of massive and lattice textures in the surface indicate that the veins analyzed in this study are from Chalcedonic Superzone and gold mineralization at the Hill Reef 1 and Hill Reef 2 Zones are well preserved.

Keywords
Epithermal, low-sulfidation, gold mineralization, vein textures

Topic
Mining and Metallurgy Engineering

Link: https://ifory.id/abstract/vmXqZ9TBHnPy

Corresponding Author
Padlil Iswahyu

Institutions
Geothermal Engineering, faculty of Petroleum UPN Veteran Yogyakarta

Abstract
Water balance between production and injection in a geothermal water dominated reservoir is very important to maintain the sustainability of steam power plant production. So that in order to plan the amount of steam produced, a natural injection calculation must be done first. This natural substance is water that is infiltrated into a reservoir that comes from rainwater inside the reservoir of the PLTP. The method of knowing natural injection is by analyzing the availability of water in the PLTP watershed, the area of the river flowing into reservoir is 30 km2, with annual rainfall around 2400 mm. One of the calculation methods used is the FJ.Mock method. This method transforms rainfall into run-off based on the concept of a hydrological model. Water availability is calculated in daily, monthly and annual rainfall. From the calculation results, the monthly average infiltrations are obtained about 154 kg/s and the annual total is about 1859 kg/s, from the results of this calculation, the total annually mass production must not exceed 1859 kg/s, if mass production exceeds infiltration, injection must be done through injection wells.

Keywords
Water balance: natural injection, FJ Mock, Sustainable

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/97pETQgdJUMH

Corresponding Author
Tri Nopi Yanti

Institutions
a) University of Lampung, Lampung
*trinopiyanti30[at]gmail.com
b) Marine Geological Institute, Bandung

Abstract
Comprehensive characterizarion methods are carried out to determine accurate source rock and reservoir identification. Geochemical data has become a critical part of recent unconventional exploration and development. However, due to high cost of geological core extraction and analysis, geophysical wireline logging tools have become the primary source of downhole measurement of geomechanical properties. This study covers an integrated approach at defining geochemical report derived from geological core extraction and analysis and its relationship with geophysical wireline logs of 5 (five) wells at Northeast Java Basin. Wireline logs can be used to identify reservoir and source rock intervals in the primary stage of well drilling. However, the well logs that directly measure the hidrogen content of the kerogen do no exist. Consequently, it used for source rock evaluations and calculation of Total Organic Carbon (TOC) most commonly include sonic, density, gamma ray, neutron, and resistivity. The Van Krevelen diagram has been applied to all 5 (five) wells that indicates 2 (two) of them have potential gas – kerogen type III/IV with marginally mature to mature source rock. The integration of well logs and geochemical data greatly improves the accuracy and understanding of the controls of reservoir quality and source rock. It can be used for further step of knowing basin potential and its prospect level.

Keywords
well log analysis; geochemical data; Total Organic Carbon; Northeast Java Basin

Topic
Geophysics,Geomatics and Geochemistry

Link: https://ifory.id/abstract/xvwgmD9VnpNE

Corresponding Author
Sudarmoyo Sudarmoyo

Institutions
UPN Veteran Yogyakarta

Abstract
The studied field is a field with the characteristics of light oil reservoir. To increase the oil recovery will be applied surfactant injection in this field. In this study the type of surfactant that will be used is Sodium Lignosulfonate (SLS) surfactant using formulations. The surfactant formulations conducted by adding Sodium Oleate and Ethylene Glycol Butyl Ether (EGBE) in variation concentration. The research conducted is a laboratory study with core flooding test and wettability test using Berea sandstone with variation of SLS surfactant concentrations. The core flooding test results will provide the largest recovery factor from SLS surfactant formulations with various concentrations. The same thing will be done on wettability test. It will be observed changes in the reservoir fluid contact angle at various formulated SLS surfactant concentrations. This study aims to determine the change in wettability of rocks that occur after the injection of SLS surfactant before and after the formulation. Furthermore, formulations and concentrations of surfactants can be selected which produce the greatest recovery to be applied to the field.

Keywords
Core flooding, Surfactant SLS, Wettability Alteration

Topic
Petroleum and Geothermal Engineering

Link: https://ifory.id/abstract/28LzRmDVdNqM