CALCULATIONS O F OIL RESERVE - BENTIU FORMATION IN JAKE OIL FIELD, USING VOLUMETRIC METHOD

Abstract

The study area (Jake oilfield) is located on the Western Escarpment of the Fula Subbasin of the Muglad Basin, which is bounded by the latitudes 11°20’ and 11°36′ N and longitudes 28° 30′ and 29° 36′ E. This oilfield has been structurally subdivided into three main structures of Jake, Jake Central and Jake South. The goal of this study is to identify reservoir type, and calculate the latent and recoverable oil reserves in “Jake oil field“, to achieve this goal in successful way the information and data of four wells (Jake South -3, Jake South -4, Jake South -7 and Jake South -8), were made available, then the evaluation of the wells data has been processed using the interactive petrophysic software (IP 3.5) version. The wireline logging data had been carefully evaluated during the process of the data application, and data quality was thought to be good. For the Reservoir identification the most useful indicator was obtained from the behavior of the gamma ray, density, and neutron logs. The thickness of pay zone in the well (Jake South-8) was determined, its equal 26.2 ft, The water oil contact in the depth 1503 m. The reservoir area has been calculated using (ArcMap 10.4.1) version, and found it is equal 6 acres. The latent and recoverable oil reserve existing in reservoir are calculated by using volumetric method, and founded: the latent oil reserve equal 253426.6221 STB, and the recoverable oil reserve equal 51597.66026 STB.