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
投稿时间:2022-02-27  修订日期:2022-04-01  点此下载全文
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作者单位邮编
冯冲 中国石油大学 北京 克拉玛依校区石油学院 834000
陈程 中国地质科学院地质力学研究所 
李梦瑶 中国石油新疆油田分公司勘探开发研究院 
张磊 中国石油新疆油田分公司勘探开发研究院 
朱涛 中国石油新疆油田分公司勘探开发研究院 
许涛 中国石油大学 北京 克拉玛依校区石油学院 
邹贤利 中国石油大学 北京 克拉玛依校区石油学院 
基金项目:国家自然科学基金青年基金项目(编号: 41802139) 稠油的核磁共振特征研究
中文摘要:准噶尔盆地西北部发育异常高压,异常高压是油气垂向运移的重要动力条件,目前已经在超压带上发现大量高压油气藏。为了揭示现今地层压力特征,恢复成藏期古压力演化特征。利用测井方法和2D盆地模拟技术,得到超压的分布和演化特征,并讨论了超压对油气运移的影响。结果表明,研究区单井地层压力结构可以分为三类;由古至今,各地层超压逐渐变大,超压由浅部地层向深部地层逐渐变大;各时期平面上超压分布呈规律性变化,整体上是由西北部向东南部逐渐增大;超压的分布和演化成为油气垂向运移有利动力条件,对研究区高压油气藏的形成具有重要的意义。
中文关键词:超压的演化  超压的分布  地层压力结构  油气运移  准噶尔盆地西北部
 
Study on Formation Pressure Evolution and Favorable Dynamic Conditions of Oil and Gas Accumulation in Northwest Junggar Basin
Abstract:Abnormal high pressure developed in Northwest Junggar Basin, and it is an important dynamic condition for vertical migration of oil and gas. At present, many overpressure reservoirs have been found in the overpressure zone. In order to reveal the characteristics of present formation pressure and restore the evolution characteristics of paleopressure during the reservoir forming period. Using logging method and 2D basin simulation technology, the distribution and evolution characteristics of overpressure have been obtained, and the influence of overpressure on oil and gas migration has been discussed. The results show that the formation pressure structures of single wells in study area can be divided into three types; From ancient times to present, the overpressure of each formation has gradually increased, and the overpressure has gradually increased from shallow formations to deep formations; The distribution of overpressure changes regularly in each period, and gradually increases from northwest to southeast; The distribution and evolution of overpressure become favorable dynamic conditions 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.
keywords:evolution of overpressure  distribution of overpressure  formation pressure structure  oil-gas migration  Northwest Junggar Basin
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