Evaluation of petrophysical properties of Mishrif Formation in some wells in Majnoon oil field - Southern Iraq

• Main Authors: Jileel, Hiba Tarq, Al-Banna, Ahmed S., Al-Sharaa, Ghazi H.
• Format: Conference Proceeding
• Language: English
• Subjects: Arches; Calcite; Deflection; Density; Dolomite; Electrical resistivity; Gamma rays; Limestone; Lithology; Mathematical analysis; Oil fields
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0091891

Petrophysical properties were calculated using available well logs data from neutron, density, sonic, gamma ray, resistivity and self-potential logs for three wells from Majnoon oil field for Mishrif Formation, one of most important production formation in the middle and south of Iraq. These logs are digitized and then environmental correction and interpretations will be carried out using Techlog 2015 software. shale volume was estimate using GR log and used to calculated effective porosities then water saturation using arches equation. Mishrif formation was divided into nine units according to the lithology logs deflection (SP, and GR) to (M1, M2, M3, M4, M5, M6, M7, M8 and M9). Mishrif Formation average values were calculated (Vsh range between 8-35%, PHIE from 5-16, PHIT from 5-27% and SW from 11-97%). From final CPI interpretation for each zone in Mishrif and from the evaluation of the electrical logs readings, which are almost equal and close in values, and this means salt drilling, and from the depths where spacing between three zones electrical resistivity logs were different in values with high value of Rt curve, in addition to the deflection of the neutron and density porosities logs curves, the reservoir unites were determined. The matrix of formation was calcite and lithology was limestone with layers of dolomite.