RESERVOIR CHARACTERIZATION AND PLAY EVALUATION OF ‘LOVE’ FIELD, NIGER DELTA.

Abstract

Reservoir characterization and play evaluation of ‘LOVE’ field was carried out to identify additional leads and prospects within the study area. The objectives of the study is to identify and correlate hydrocarbon bearing sands and determine their reservoir properties in order to identify additional leads and quantify the hydrocarbon in the established reservoirs. Gamma ray and resistivity logs were used to delineate lithology and identify hydrocarbon charged reservoirs respectively. Petrophysical properties (porosity, volume of shale, fluid saturation, gross pay, net pay and net/gross) of the identified reservoirs were computed using basic equations. Some of the computed petrophysical properties were modelled to give a visual representation of the physical property. Horizons of interest were mapped and generation of structural maps with picking of faults was carried out. The identified hydrocarbon bearing sands were subsequently mapped and depth structure maps were generated for each horizon. Reserve estimate was calculated to know if the field is commercially viable based on the volume of hydrocarbon. The structural analysis revealed that ‘LOVE’ Field is made up of simple structural traps. The depth maps showed that the bilobate structures are zones of hydrocarbon accumulation within the field. The porosity model revealed that porosity distribution does not follow a special trend but it is rather related to diagenetic processes which are responsible for the reservoir potential. The oil and gas models correlate with the well-log analysis as the models show that reservoir R2 and R3 are charged with gas and oil respectively. The hydrocarbon saturation ranges from 12% to 79%, 0% to 71.82% and 21% to 88% on Reservoir R1, R2 and R3 respectively. The volume of shale ranges from 8.12% to 18.11%, 8.34% to 13.41% and 8.01% to 14.56% on Reservoir R1, R2 and R3 respectively which depicts good reservoir of clean sand deposition. The play evaluation also shows that several prospects are available for hydrocarbon exploitation following the interpretation done on the structural maps that reveal many closures and many fault dependent closures in the field. Hydrocarbon retention in the prospect area is dependent on the sealing capacity of the fault. In conclusion, ‘LOVE’ Field is a productive field with good average porosity of about 24%, average hydrocarbon saturation 74% and average volume of shale of 10% which indicate good reservoir of clean sand deposition. Hydrocarbon retention within the study area would depend on the sealing capacity of the faults and the bilobate structure.