吉木萨尔凹陷芦草沟组超高压形成机制及演化特征
发布时间：2018-10-29 17:53
【摘要】：准噶尔盆地吉木萨尔凹陷中二叠统芦草沟组普遍发育超高压,综合运用测井、钻井、试油资料及盆地模拟技术,分析了现今地层压力特征和超高压形成机制,并恢复了芦草沟组古压力演化特征。研究结果表明,吉木萨尔凹陷现今压力结构由浅至深可分为常压带、浅层超高压带、压力过渡带和深层超高压带4个压力带;芦草沟组位于深层超高压带,在横向上超高压具有一定的连续性,剩余压力多为10~20 MPa,压力系数为1.10~1.50.芦草沟组地层压力演化经历了3个半"增压—泄压"旋回,且压力演化的旋回性与沉积速率、生烃排烃和构造抬升存在较好的匹配关系;沉积物快速埋藏导致的欠压实是形成第一期超高压的主要原因,在三叠纪晚期进入生烃门限后,生烃增压则成为形成第二期和第三期超高压的重要机理。
[Abstract]:Ultra-high pressure is generally developed in Lucaogou formation of Middle Permian in Jimusar depression of Junggar Basin. The characteristics of formation pressure and the formation mechanism of ultra-high pressure are analyzed by comprehensive use of logging, drilling, oil testing data and basin simulation techniques. The paleo pressure evolution characteristics of the Lucaogou formation were restored. The results show that the present pressure structure of Jimusar sag can be divided from shallow to deep into four pressure zones: shallow ultra-high pressure zone, pressure transition zone and deep pressure zone. The Lucaogou formation is located in the deep ultra-high pressure zone and has a certain continuity in the transverse. The residual pressure is mostly 10 ~ 20 MPa, and the pressure coefficient is 1.10 ~ 1.50. The formation pressure evolution of the Lucaogou formation has experienced three "pressurized pressure relief" cycles, and there is a good matching relationship between the cycle of pressure evolution and the sedimentation rate, hydrocarbon generation and expulsion of hydrocarbon generation and tectonic uplift. The undercompaction caused by the rapid burial of sediments is the main cause of the formation of the first stage of ultra-high pressure. After entering the threshold of hydrocarbon generation in the late Triassic, hydrocarbon generation pressurization becomes an important mechanism for the formation of the second and third phases of ultra-high pressure.
【作者单位】： 中国石油大学地球科学与技术学院;
【基金】：国家973项目(2014CB239005) 国家科技重大专项(2016ZX05001,2016ZX05006)
【分类号】：P618.13
本文编号：2298374
[Abstract]:Ultra-high pressure is generally developed in Lucaogou formation of Middle Permian in Jimusar depression of Junggar Basin. The characteristics of formation pressure and the formation mechanism of ultra-high pressure are analyzed by comprehensive use of logging, drilling, oil testing data and basin simulation techniques. The paleo pressure evolution characteristics of the Lucaogou formation were restored. The results show that the present pressure structure of Jimusar sag can be divided from shallow to deep into four pressure zones: shallow ultra-high pressure zone, pressure transition zone and deep pressure zone. The Lucaogou formation is located in the deep ultra-high pressure zone and has a certain continuity in the transverse. The residual pressure is mostly 10 ~ 20 MPa, and the pressure coefficient is 1.10 ~ 1.50. The formation pressure evolution of the Lucaogou formation has experienced three "pressurized pressure relief" cycles, and there is a good matching relationship between the cycle of pressure evolution and the sedimentation rate, hydrocarbon generation and expulsion of hydrocarbon generation and tectonic uplift. The undercompaction caused by the rapid burial of sediments is the main cause of the formation of the first stage of ultra-high pressure. After entering the threshold of hydrocarbon generation in the late Triassic, hydrocarbon generation pressurization becomes an important mechanism for the formation of the second and third phases of ultra-high pressure.
【作者单位】： 中国石油大学地球科学与技术学院;
【基金】：国家973项目(2014CB239005) 国家科技重大专项(2016ZX05001,2016ZX05006)
【分类号】：P618.13
【相似文献】
相关期刊论文 前3条
1 本刊编辑部;;新疆油田在吉木萨尔凹陷勘探又获重要发现[J];新疆石油地质;2011年06期
2 王尤宏;;新疆吉木萨尔沸石的应用研究成果显著[J];建材地质;1991年05期
3 ;[J];;年期
相关硕士学位论文 前1条
1 时丕同;吉木萨尔凹陷油藏地球化学研究[D];西南石油学院;2003年
，本文编号：2298374
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2298374.html
