Hydrocarbon probability of Middle Ordovician Hawaz Formation, Murzuq Basin, Southwestern Libya (2015)

Middle Ordovician Hawaz clastic reservoir on the Murzuq Basin is a new exploration play of great importance in NC-186 concession. H-field is one the new discoveries in this concession. The main target of this investigation is to detect and evaluate the hydrocarbon play of Hawaz Formation in H-field. Petrophysical characteristics and seismic interpretations of Hawaz Formation in H oil field, Concession NC186 of Murzuq basin have been evaluated through the analysis of well-logging records of ten exploratory and twenty 3D seismic sections, distributed in H oil field. These data have been analyzed and interpreted through utilizing some analytical cross-plots. The litho-saturation analysis indicates, the Hawaz Formation is mainly oil-bearing with some water-bearing sand levels with thickness ranges from 550 ft in the northwestern part of this field and increase to more than 640 ft. This surface was picked at picked 840 msec (TWT) in the northwestern part of the study area and increase to 1060 msec (TWT) in the southeastern part of the study area. The Hawaz surface was located at depths ranges from 4360ft in northwestern part and increase to 4611 ft in H3-NC186 well in the southeastern part of the H-field. The analytical formation evaluation reveals that the lithological facies consists mainly of sandstone and little shale. This sandstone is coursing upward. The lateral distribution of the petrophysical parameters portrays that Hawaz formation is a good reservoir rock where H4 and H5 horizons are the main productive zones.