Geochemical Evaluation of Abu Gabra source rock formation in Hamra oilfield

Abstract

The objective of this study is to evaluate the Abu Gabra source rock formation in Hamra oilfield, Muglad basin, Sudan. This is done using results of analysis of ‘‘38” samples from the shales of the Abu Gabra formations in Hamra oilfield from Hamra SE-1 and Hamra SW-2 wells. The samples have been analyzed using the geochemical method of Rock–Eval pyrolysis and results of the analysis were provided by CPL. The analysis shows that the total organic carbon content lies between 0.15 and 2.13 wt%. It also shows that kerogen is a mixture of type I and III that is dominant, and is deposited in the lacustrine environment under prevailing reducing conditions. This type of kerogen is prone to gas and oil/gas production. The geochemical diagrams show that all the studied samples have fair to good quantity and lies in the mature stage. Furthermore, the total organic carbon TOC has been calculated all over Abu Gabra formation within Hamra oilfield using the trendline equation generated from the cross-plotting of GR log reading against TOC values obtained from the core.