Abstract

In western offshore basin, some of the wells are producing hydrocarbon from fractured basement reservoir. The accurate identification of fractures is the critical part for evaluation of unconventional reservoirs like basement. In present technology, the fractures can be identified from wellbore imaging tools like Formation Micro-Imager and Dipole Shear Sonic, which is very expensive and time consuming. The objective of present study is to identify the fractures from conventional log like flushed zone resistivity (MSFL), density (RHOB), sonic log (DT), density correction (DRHO) and photoelectric factor (PEF). The fractures are identified based on the response of conventional logs recorded in fractured section in 6 nos. of wells in western offshore basin, India. The identified fractures are also confirmed with the sedimentological study carried out on core sample. This technique for identification of fractures from conventional Wireline logs integrated with core studies is very useful and cost effective.