新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (3): 282-285.

• 油气勘探 • 上一篇    下一篇

柴西南古近系和新近系异常压力与油气成藏

曹海防1, 闫林2, 夏斌1, 周莉3   

  1. 1.中国科学院 广州地球化学研究所, 广州 510640;
    2.中国石油 石油勘探开发科学研究院, 北京 100083;
    3.中国石油 青海油田分公司 勘探开发研究院, 甘肃 敦煌 736202
  • 收稿日期:2006-09-18 修回日期:2006-11-27 出版日期:2007-06-01 发布日期:2020-07-31
  • 作者简介:曹海防(1978-), 男, 山东博兴人, 在读博士研究生, 含油气盆地分析,(Tel) 020-95290910(E-mail) caohaifang@126.com

The Abnormal Pressure and Hydrocarbon Accumulation of Tertiary in Southwestern Qaidam Basin

CAO Hai-fang1, YAN Lin2, XIA Bin1, ZHOU Li3   

  1. 1. Guangzhou Institute of Geochemistry, CAS, Guangzhou, Guangdong 510640, China;
    2. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    3. Research Institute of Exploration and Development, Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China
  • Received:2006-09-18 Revised:2006-11-27 Online:2007-06-01 Published:2020-07-31

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摘要： 通过对部分探井测试压力的分析和异常压力特征的研究,发现柴达木盆地西部南区压力类型多样,在一定深度存在异常高压。各构造单元在异常高压初始层位、初始深度、剖面特征等方面又有不同特点。依据异常压力成藏机制对柴西南油气成藏阶段进行了划分,并分析了异常压力对油气藏类型和油气藏分布的控制作用。研究认为,超压带泥岩裂缝、岩性油气藏将是今后的重要勘探领域。

关键词: 柴达木盆地, 异常压力, 油气藏, 控制

Abstract: The analysis of tested pressure and the study of abnormal pressure characteristic in partial prospecting wells indicate that there exist various types of pressures in southwestern Qaidam basin and abnormal overpressure in certain depth. But different structural units have different characteristics in initial horizon, initial depth of abnormal pressure and their section features. According to oil-gas accumulation mechanism under abnormal pressure, the hydrocarbon accumulation phases are classified, and the effects of the abnormal overpressure on reservoir type and distribution are analyzed. The study shows that the mud fracture in overpressure zone and lithologic reservoir should be the target domains for petroleum exploration.

Key words: Qaidam basin, abnormal pressure, reservoir, effect

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