[1]赖仁,查明,高长海,等.吉木萨尔凹陷芦草沟组超高压形成机制及演化特征[J].新疆石油地质,2016,(06):637.[doi:10.7657/XJPG20160603]
 LAI Ren,ZHA Ming,GAO Changhai,et al.Formation Mechanism and Evolution Characteristics of Ultra-High Pressure in Lucaogou Formation of Jimsar Sag, Junggar Basin[J].Xinjiang Petroleum Geology,2016,(06):637.[doi:10.7657/XJPG20160603]
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吉木萨尔凹陷芦草沟组超高压形成机制及演化特征()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2016年06期
页码:
637
栏目:
出版日期:
2016-12-01

文章信息/Info

Title:
Formation Mechanism and Evolution Characteristics of Ultra-High Pressure in Lucaogou Formation of Jimsar Sag, Junggar Basin
文章编号:
1001-3873(2016)06-0637-07
作者:
赖仁 查明高长海曲江秀丁修建
(中国石油大学 地球科学与技术学院,山东 青岛 266580)
Author(s):
LAI Ren ZHA Ming GAO Changhai QU Jiangxiu DING Xiujian
(School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China)
关键词:
准噶尔盆地吉木萨尔凹陷芦草沟组盆地模拟古压力压力系数超压成因机制
Keywords:
Junggar bain Jimsar sag Lucaogou formation basin modeling paleopressure pressure coefficient ultra-high pressure formation mechanism
分类号:
TE112.23
DOI:
10.7657/XJPG20160603
文献标志码:
A
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 generally occurs in the Middle Permian Lucaogou formation of Jimusar sag, Junggar basin. This paper analyzes the present formation pressure features and the ultra-high pressure formation mechanism and reconstructs the paleopressure evolution of Lucaogou formation by using logging, drilling, formation testing data combined with basin modeling technology. The study results show that the present pressure structure can be categorized into four zones from top to bottom such as normal pressure zone, shallow ultra-high pressure zone, transitional zone and deep ultra-high pressure zone. Lucaogou formation is located in the deep ultra-high pressure zone which is continuous laterally. Most residual pressures range from 10 to 20 MPa and the pressure coefficient is 1.10~1.50. The paleopressure evolution of Lucaogou formation experiences three and a half cycles of pressurization—decompression and there is a good matching relationship among the pressure cycle, sedimentation rate, hydrocarbon generation and expulsion and tectonic uplifting. Undercompaction resulted from the rapid burial of sediments is the main reason causing the first stage of ultra-high pressure. After reaching the hydrocarbon generation threshold in Late Triassic, hydrocarbon-generating pressurization was the key mechanism for the second and third stages of ultra-high pressure

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更新日期/Last Update: 2016-11-29