Petrophysical Evaluation of Mishrif Formation in X oilfield, southeastern Iraq

Abstract

Well logs data was analyzed and used to identify reservoir properties. The Mishrif Formation was sudivided into six units (MA, MB1, MB2, MC1, MC2 and MC3) with different potential characteristics. By using the MID method and M-N cross plots to determine the rock and mineral composition of the Mishrif Formation in the X oil field, it was found through the profiles that the Mishrif Formation consists largely of limestone, little dolomite and shale. Based on the CPI results of the two wells (XA and XB)it was noted that the units BM1, BM2 and MC1 reservoir units have good petrophysical properties as they had good porosity ranging from 0.1 to 0.19 with low values of water saturation (0.3-0.79) and shale volume (0.0295-0.070) respectively). Due to these characteristics these units are considered oil-bearing areas are among the most important units in the Mishrif Formation in the X field. while the other units (MA, MC2 and MC3) are considered non-reservoir units due to It has poor petrophysical properties.