RESERVOIR EVALUATION OF PAB SANDSTONE BY PETROPHYSICAL INTERPRETATIONS OF BHIT-FIELD, SOUTHERN INDUS BASIN, PAKISTAN

Abstract

In the field investigation of hydrocarbon producing Late Cretaceous Pab Sandstone Formation in southwest Pakistan, links between architectural aspects of significant sand bodies and reservoir properties were investigated. Central and Southern Indus Basin are collectively known as Lower Indus Basin. Petrophysical study has been performed in the Bhit field wells, Bhit-02, Bhit-03, and Bhit -04, for the purpose of locating hydrocarbons. The location of the study wells' coordinates (26 16 55.4316 N and 67 27 31.7707 E). Pab Formation, which dates from the Cretaceous, has been the subject of this study. The volume of shale, average porosity, effective porosity, water resistivity, saturation of water, saturation of hydrocarbon, hydrocarbon pore volume, and net pay of the reservoir will be estimated using the well log data from Bhit-02, Bhit-03, and Bhit-04 that are run using GeoGraphix software. The reservoir zone of the well Bhit-02 has good hydrocarbon potential, and the typical net pay is between 13 and 18 meters. The reservoir zone of the well Bhit-03 also has a good potential for hydrocarbons; the average net pay estimate for this well ranges from 2 to 8 meters. Data and logs from the Bhit-04 well are missing, and they were not evaluated. To better understand the depth of the sandy and shale zone of the Pab Sandstone, structural and stratigraphic correlation is done after the interpretation of these wells. Be aware of the structural deformation of the research region as well as the variations in Pab Sandstone thickness from well to well. Crossplots are used to determine the lithology or matrix. Umaa vs. RHOmaa cross plot and M-N lithology cross plot are the cross plots that were employed in this study The Pab Sandstone was primarily made of quartz, feldspar, and some calcite, according to the study of these cross plots. The Pab Sandstone in Bhit-02 and Bhit-03 has a good reservoir for the accumulation of hydrocarbon, according to the findings of this comprehensive study.