Abstract

GK-28 area, in the shallower waters of Kutch offshore on the Western passive margin of India, has been in focus for Trap exploration after discovery of hydrocarbon in Trap in a recently drilled well. The tectonic architecture defined by three Precambrian trends, the NNW-SSE normal faults and the NE-SW & ENE-WSW trending transfer faults, play a key role in migration and accumulation of hydrocarbon in trap. Detailed study of well logs was carried out in wells drilled considerably within Trap. Analyses brought out that the secondary porosity in Trap is limited to joints and moderately weathered vesicular basalt and permeability is entirely fracture driven. Fracture modeling workflow was adapted for the GK-28 area along with integration of petrophysical analysis and laboratory inputs. The integrated fracture model best explains the heterogeneity of the trap reservoirs in this area and helped identify future potential areas for Trap exploration.