The Methods of Determination of Stratigraphic Boundaries and Reservoir Units for the Yamama Formation in the Ratawi Oil Field, Southern Iraq

Abstract

The qualitative interpretation of the logs was used by interpreting the behaviour of their curves to determine the upper and lower boundaries of the Yamama Formation in the Ratawi Oil Field, southern Iraq, and their reservoir units for the wells in the study area. Quantitative interpretation has been used to calculate the petrophysical parameters by applying equations and Petrel Software. Detailed core examinations, thin sections, and cuttings data were collected for facies analysis and divided into primary and secondary facies. These data identify the formation tops and thicknesses and have also been used in stratigraphic correlation. These core and log data are also crucial for determining the separator boundaries between the formations that return to the reservoir.