| 准噶尔盆地西北部地层压力演化与油气成藏有利动力条件研究 |
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| 关键词:evolution of overpressure distribution of overpressure formation pressure structure oil-gas migration Northwest Junggar Basin |
| 基金项目:国家自然科学基金青年基金项目(编号: 41802139);新疆维吾尔自治区高校科研重大项目(编号: XJEDU2017I011);中国石油大学(北京)克拉玛依校区科研启动项目(编号: XQZX20180030) |
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| 摘要: |
| Study on the Formation Pressure Evolution and Favorable Dynamic Conditions of Oil and Gas Accumulation in Northwest Junggar Basin |
| Abnormal high pressure has developed in Northwest Junggar Basin, and it is an important dynamic condition for the vertical migration of oil and gas. At present, many overpressure reservoirs have been found in the overpressure zone. This study aimed to reveal the characteristics of present formation pressure and restore the evolution characteristics of paleopressure during the reservoir forming period. Distribution and evolution characteristics of overpressure were obtained using the logging method and 2D basin simulation technology, and the influence of overpressure on oil and gas migration was discussed. The results showed that the formation pressure structures of single wells in the study area could be divided into three types. From ancient times to the present, the overpressure of each formation gradually increased, and it gradually increased from shallow formations to deep formations. The distribution of overpressure changed regularly in each period, and gradually increased from northwest to southeast; the distribution and evolution of overpressure is a favorable dynamic condition for vertical migration of oil and gas, which is of great significance to the formation of high-pressure oil and gas reservoirs in the study area. |
| FENG Chong,CHEN Cheng,LI Meng-yao,ZHANG Lei,ZHU Tao,XU Tao,ZOU Xian-li.2022.Study on the Formation Pressure Evolution and Favorable Dynamic Conditions of Oil and Gas Accumulation in Northwest Junggar Basin[J].Acta Geoscientica Sinica,43(5):689-697. |
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