Petrophysical Investigation of the Hawas Formation within the Concession Area (J-field-NC-186) in the Northwestern Region of the Murzuq Sedimentary Basin, Libya

الملخص

This research includes a study of the petrophysical parameters of the Hawaz Formation in the Murzuq Basin, which was deposited in the pre-Cambrian to Quatrain ages, with a thickness of about 5000 to 6000 meters. The thickness varies in different areas of the basin. The depositional environment of the Murzuq Basin is characterized by diverse sedimentary formations, which include sandy formations that are a major part, where sand dunes and arid areas of clay and silt are found in some areas, reflecting the history of deposition in ancient aquatic environments and carbonate formations that include limestone, indicating ancient marine environments. In this study, the zone that carries good reservoir properties was obtained, where the volume of clay (Volume of Shall) was calculated using the gamma ray log (Gama Ray log) and the percentage was about 30%, and the primary porosity was calculated through s (Sonic log) and density logs (Density log) and the primary porosity was in the range of 12.6%, as well as the total porosity (Total Porosity) was calculated about 11% and also the water saturation (Water Saturation) was calculated and was about 20% using Archie's equation, while the oil saturation was about 80% and this gives excellent productivity for this formation.