科研之友
微信
新浪微博
Facebook
分享链接
摘要
Geochemical, geological, and geophysical data were used to identify and update genetic oil families, potential source rocks, and hydrocarbon generation kitchen as well as probable migration pathways in the northwestern part of the Persian Gulf. Rock-Eval analysis was performed on 52 cutting samples of prospective Cretaceous-Tertiary source rocks. According to the results, most of the samples have poor to fair potential for hydrocarbon generation, except for the Albian Formation which possesses good to excellent source rock characteristics in the study area. Two genetic oil families were identified based on source- and age-related biomarkers as well as stable carbon isotope ratios for 23 crude oil samples. Family I occurs in upper Jurassic-lower Cretaceous reservoirs mainly in the Surmeh-Hith Basin whereas family II occurs in lower Cretaceous-Tertiary reservoirs mainly in the Garau-Gotnia Basin. All attempts to correlate the identified families to prospective source rocks failed due to substantial maturity differences between the oils and rock samples. Inversion correlation based on detailed isotopic and biomarker analyses, however, confirms that the carbonates and marls of the Neocomian and Albian Formations are the main oil-generating facies for families I and II, respectively. The geographical extension and composition of the identified oil families are highly affected by source rock facies distribution and migration pathways. 2D cross sections provided in the region indicate the dominance of lateral and vertical migration pathways from the Binak depression as the main hydrocarbon generation kitchen toward the structural highs in the study area.
- 出版日期2017-5
