Reservoir Geometry Determination and Volumetric Reserve Estimation of an Offshore, Niger Delta Basin Nigeria

Volumetric reserve estimation had been carried out as well as deducing the reservoir geometry of Idje field. Idje field is an 8.4 km2 area between latitudes 4°31’49”N and 4°33’23” N and longitudes 4°34’43”E and 4°36'17"E offshore Niger Delta in a water depth of approximately 1000 m on the continental slope. Well logs suites from ten wells comprising gamma-ray, resistivity, neutron and density were obtained and analyzed. From the result, it was observed that the reservoir was a sedimentary dome possibly resulting from an underlying shale diaper. The volumetric reserve estimate for the D-3 reservoir shows that it contains 15.8 million barrels of oil and 32 billion cubic feet of gas. If the field is produced at the rate of 10,000 barrels per day, it would yield production for approximately 4 years before subsequent secondary and tertiary recovery measures would be employed.