Abstract

Finding hydrocarbon from well logs is extremely difficult when log signature exhibits vague and complex in nature. Recently, in Bengal On-land Basin, oil and gas has been discovered in a well whose log characters appeared to be not promising. There was no hydrocarbon show during drilling and not so encouraging basic log motif as well. Despite this, careful and optimistic log evaluation coupled with some Hi-Tech logs, e.g., XMAC, RCI and STAR helped in finding hydrocarbon in this well. All the recorded log data were processed analyzed and interpreted to predict and recommend the hydrocarbon bearing interval. The well was tested with TCP perforation and produced gas in Object-I @ 1.08 lakh m3/day with 8 mm bean size whereas the object-II produced oil @ 10 m3/day with 6 mm bean. This paper highlights the overall log interpretation strategy integrated with few Hi-Tech tools such as RCI, XMAC and STAR which directly contributed towards the discovery of hydrocarbon in Bengal Basin.