Exploration prospects of the whole oil and gas system in the Permian hydrocarbon depressions in the Eastern Junggar Basin
| Autor: | ZHI Dongming, XIE An, YANG Fan, MA Qiang, HE Changsong, GOU Hongguang |
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| Jazyk: | čínština |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Dizhi lixue xuebao, Vol 30, Iss 5, Pp 781-794 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1006-6616 01839810 |
| DOI: | 10.12090/j.issn.1006-6616.2024029 |
| Popis: | Objective Multiple types of oil reservoirs, including conventional oil, tight oil, and shale oil, have been discovered from the slope area to the depression area in the Jimusaer Depression, demonstrating the characteristics of conventional–unconventional ordered coexistence and complete oil and gas system accumulation. Methods Source rocks, sedimentary reservoirs, and reservoir formation were examined to explore the rules of oil and gas accumulation in hydrocarbon-rich depressions in the Eastern Junggar. Results High-quality, saline, lacustrine facies source rocks are believed to be developed in the Middle Permian of the Eastern Junggar. The source rocks in the Jinan, Jimusaer, and Shishugou Depressions have large scale and best quality and have reached the mature stage of evolution. The inherited ancient uplifts around the Permian hydrocarbon-rich depression provided long-term material sources, with the development of fan deltas, braided river deltas, and saline lake sediments, forming sandy conglomerates, cloudy sandstones, cloudy mudstones, etc., in an orderly manner and demonstrating the characteristics of grain sequence reservoir formation. Conventional oil and gas, tight oil and gas, and shale oil and gas accumulations, demonstrating a complete type of reservoir formation and complete oil and gas system development pattern, are developed from the edge of the basin to the depression area. Conclusions The depressions in the Eastern Junggar Basin show a whole oil and gas system pattern. Significance Under the guidance of the entire oil and gas system reservoir formation model, the southern slope of the Shishugou Sag and the Lucaogou Formation of the Jinan Sag were selected as important exploration zones for future exploration in the Eastern Junggar. |
| Databáze: | Directory of Open Access Journals |
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