--> Abstract: Geochemical Characteristics of Source Rocks, and the Hydrocarbon Family in the Eastern Sirte Basin - Libya; #90063 (2007)

Datapages, Inc.Print this page

Geochemical Characteristics of Source Rocks, and the Hydrocarbon Family in the Eastern Sirte Basin - Libya

 

Abulkhier, Idris1 (1) Waha oil company, Tripoli, Libya

 

Identifying the characteristics source rock sediments and the knowledge of the petroleum generation is well known in the exploration success of an area. Detailed evaluation of the qualities and the maturation levels of the Upper and Lower Cretaceous potential source rocks in the eastern Sirte basin was the primary objective of this study. In this study cutting samples and core samples from more than fourteen wells have been analyzed geochemically and paleonologically. Geochemical data from previous studies and the result of oil samples analysis from selected wells have also been incorporated. The work has been concentrated on selected intervals of Lower Cretaceous sediments, some samples from Upper Cretaceous sediments and younger units were also analyzed to identify the source rocks and their maturity levels. The results of this study indicate that both petroleum systems (Upper and Lower Cretaceous rocks) have a very good source section with high potential for oil and gas generation. Both systems have organic facies derived from marine and terrestrial organic input. The Geochemical analysis including carbon isotope, gas chromatograph, and mass spectrometry indicates that the Hydrocarbon extracted from Pre Upper Cretaceous have a positive correlation with Hydrocarbon found in the Lower Cretaceous Nubian sandstone. The Geochemical modeling has demonstrated that source rock in the deeper parts of the eastern Sirte basin is mature for oil and gas generation. The hydrocarbons were derived from different organic facies and grouped into four oil families, oil from Upper Cretaceous, oil from Lower Cretaceous, oil from Triassic, and oil from mixed or unknown source rocks.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California