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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.