Geological Implications of Geophysical Enhancement Techniques in Kirkuk Oilfields Area

Abstract

The study area is located in Kirkuk governorate in the north–eastern part of Iraq within the footills zone which includes the transverse Kirkuk block that contains oilfield anticlines (Baba, Bai Hassan and Khabaz) trending NW to SE. The previous studies have pointed out that there are tectonic faults and sub-blocks in and around the study area. The enhancement processings were applied on the available geophysical data in the purpose of identifying the tectonic and structural implications via a correlation with the previous petroleum and academic studies. The first directional derivatives of the gravity data revealed the presence of three deep seated secondary blocks coinciding with the boundary of central faulting and Kirkuk fault. The map of the math's difference between the maps obtained by filters (8 & 90) delineated the sub-blocks boundaries. Furthermore, the math's difference between the maps obtained by filter (8) and the original Bouguer is characterized by associating with faults of south eastern parts of the study area. The map of math's difference between geogridding and local polynomial data is also displayed that the structures of Bai Hassan, Khabaz and Jambur representing a huge geological structure (separated with saddles) parallel to Kirkuk structure. The first directional derivative map of the geomagnetic data is also illustrated the deep sub-blocks underneath the structures of the study area. As well, the map of the math's difference between original total magnetic field and local polynomial is displayed the presence of shallow magnetized bodies.