Lawson-Jack, OsakiOpara, Alexander I.2020-02-172020-02-172018-07Osaki, L. J., & Opara, A. I. (2018). QUANTITATIVE PETROPHYSICAL EVALUATION AND RESERVOIR CHARACTERIZATION OF WELL LOGS FROM" DATOM" OIL FIELD, NIGER DELTA. Petroleum & Coal, 60(4).1337-7027http://repository.elizadeuniversity.edu.ng/jspui/handle/20.500.12398/676This paper presents a detailed reservoir characterization of three wells in “Datom” Oil Field, Niger Delta using well logs data. The distributions and thicknesses of sand bodies were determined within each of the wells in the field using interactive petrophysical (IP) software. The quantitative and qualitative analysis were done for the three exploration wells with the depth ranges of 8700-9200ft for Datom North well , 8900-9400ft for Datom West well, and 9000-9500ft for Datom East well. Two distinctive porous sand bodies were identified across the field (A and B), Datom North has it reservoirs as 1A (8815- 8903ft) and 1B (9100-9157ft), Datom West has its reservoir as 2A (8996-9095ft) and 2B (9263- 9321ft) and Datom East as 3A (9101-9219ft) and 3B (9357-9418ft). Petrophysical evaluation was made from a suite of wire-line logs comprising of gamma ray, resistivity, neutron and density logs of the wells. The average porosity values obtained are in the range of 0.18-0.22 with average net pay permeability values ranging from 322.70mD to 733.20mD. The water saturation obtained for each reservoir unit in combination with the resistivity index was used to prove the presence of hydrocarbon in the sand units. The hydrocarbon saturation of the reservoirs are in the range of 0.6-0.7 across the prospect zones with gas effect of the combination logs of neutron and density indicating the hydrocarbon accumulation is predominantly gas. The average net to gross ratio across the reservoirs (0.7-0.9) is defined using an average porosity (∅) and volume of clay (𝑉𝑐𝑙𝑎𝑦 ) cut offs values of ≥ 0.1 𝑎𝑛𝑑 ≤ 0.5 respectively. With a moveable hydrocarbon index (MHI=𝑆𝑊 𝑆𝑋𝑂 ⁄ ) less than 0.7 across the sand units, it shows favorable hydrocarbon moveability in the reservoirs. The results clearly revealed that the gas bearing sand units have good reservoir potentials favorable for hydrocarbon production.enPetrophysicsNet-to-GrossNiger deltawell logsPorosityWater and Hydrocarbon SaturationArticle