新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (3): 270-273.

• 油气勘探 • 上一篇    下一篇

辽河盆地大民屯凹陷压力场演化史模拟

史建南1, 姜建群2, 李明葵2   

  1. 1.中国地质大学，湖北武汉430074;
    2.中国石油辽河油田分公司,辽宁盘锦124010
  • 收稿日期:2003-08-12 发布日期:2020-09-18
  • 作者简介:史建南(1975-),男,辽宁盘锦人,在读硕士研究生，油气成藏机理。联系电话:027-87436682。
  • 基金资助:
    国家杰出青年科学基金项目,沉积盆地超压系统演化及其成藏效应(编号:40125008)

The Modeling of Pressure Field Evolution History in Damintun Sag, Liaohe Basin

SHI Jian-nan1, JIANG Jian-qun2, LI Ming-kui2   

  1. 1. China University of Geosciences, W uhan, Hubei 430074, China;
    2. Liaohe Oilfield Company, PetroChina, Panjin, Liaoning 124010, China
  • Received:2003-08-12 Published:2020-09-18

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摘要： 运用 Basin2盆地模拟软件对大民屯凹陷进行了压力场演化模拟，结果表明,超压在本区比较普遍,超压在垂向上有一定延续性、持续深度大,横向上规律性不强，断层对超压的积累与释放起着重要的控制作用。与运用等效深度法得出的现今剩余压力展布对比可知，两者吻合较好,证明Basin2模拟结果比较可靠,即本区超压演化总体上符合“无一陡增一平缓上升一最高一下降一最低”这一规律，这与该区盆地沉降过程相一致。超压对油气生、运、聚影响显著,根据不同层位超压展布特征可判断大民屯凹陷EsI末期、东营组为含烃流体主要运移期,剩余压力低值区的有利圈闭应为有利成藏区,是今后勘探的重要区域。

关键词: 辽河盆地, 大民屯凹陷, 压力分布, 演化, 模拟

Abstract: The pressure field evolution in Damintun Sag is modeled with Basin-2 simulator. The result indicates that overpressure preva-lently occurs in this area, which is characterized by vertical extension and deep expansion, and faults are important to control the accu-mulation and release of overpressure. The result is consistent with remaining pressure distribution of equivalent depth method, whichproves the reliability of the modeling result by using Basin-2 simulator. The evolution of overpressure is generally followed by such rule ofoverpressure changes as zero, steeply growing, gently increasing, up to the top, declining and the lowest, which is well matched with thedepressed process of this area. It is indicated that the overpressure greatly affects the generation, migration and accumulation of hydrocar-bons in it. In view of the distribution characteristics of overpressure in different strata, it is suggested that Late EgS, and Dongy ing forma-tion are the main hydrocarbon migration period and the traps in low-value area of residual pressure are favorable petroleum accumulationareas to be regarded as important domains for oil-gas exploration.

Key words: Liaohe basin, Damintun sag, pressure distribution, modeling, evolution

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