西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (4): 104-110.DOI: 10.11885/j.issn.1674-5086.2019.06.10.02

• 石油与天然气工程 • 上一篇    下一篇

论构造应力不是油气初次运移的主要动力

罗川1, 杨虎2   

  1. 1. 克拉玛依职业技术学院石油工程系, 新疆 克拉玛依 834000;
    2. 中国石油大学(北京)克拉玛依校区, 新疆 克拉玛依 834000
  • 收稿日期:2019-06-10 出版日期:2020-08-10 发布日期:2020-08-10
  • 通讯作者: 罗川,E-mail:1420983699@qq.com
  • 作者简介:罗川,1986年生,女,汉族,四川南充人,讲师,硕士,主要从事油藏工程方面的研究。E-mail:1420983699@qq.com;杨虎,1974年生,男,汉族,新疆克拉玛依人,高级工程师,博士,主要从事石油工程岩石力学方面的研究。E-mail:411195188@qq.com
  • 基金资助:
    中国石油大学(北京)克拉玛依校区引进人才基金项目(YJ2018B01003)

Tectonic Stress is Not the Main Driving Force for Primary Migration of Oil and Gas

LUO Chuan1, YANG Hu2   

  1. 1. Department of Petroleum Engineering, Karamay Vocational&Technical College, Karamay, Xinjiang 834000, China;
    2. Karamay Campus, China University of Petroleum(Beijing), Karamay, Xinjiang 834000, China
  • Received:2019-06-10 Online:2020-08-10 Published:2020-08-10

摘要: 油气初次运移是一个尚未完全解决的学术难题。石油地质学界认为,构造应力是油气初次运移的主要动力之一,笔者对该观点进行了质疑。根据有效应力理论和弹性力学理论,分析了构造应力对孔隙压力的影响,建立了孔隙压力增量的计算模型以及孔隙压力释放驱动油气运移尺度的计算模型。结果表明,相同构造应力条件下,烃源岩的孔隙压力增量主要受杨氏模量影响,杨氏模量越大,孔隙压力增量越小;构造应力导致的孔隙压力增量一般不会超过60 MPa;孔隙压力释放只需要排出少量地层流体即可,驱动油气运移的距离很短,相对于烃源岩厚度几乎可以忽略不计;构造应力对油气初次运移的影响十分微弱,不可能是初次运移的主要动力。

关键词: 构造应力, 初次运移, 动力, 孔隙压力, 烃源岩

Abstract: The primary migration of oil and gas is an unsolved academic problem. In the field of petroleum geology, structural stress is considered to be one of the main driving forces for the primary migration of oil and gas. According to the theory of effective stress and elastic mechanics, the influence of structural stress on pore pressure is analyzed. The calculation model of pore pressure increment and the calculation model of oil-gas migration scale driven by pore pressure release are established. Theoretical analysis and quantitative calculation results show that under the same structural stress condition, the increment of pore pressure of source rock is mainly affected by Young's modulus. The larger the Young's modulus is, the smaller the increment of pore pressure is; the increment of pore pressure caused by structural stress is generally not more than 60 MPa; the release of pore pressure only needs to discharge a small amount of formation fluid, and the distance to drive oil and gas migration is very short, relatively because the thickness of source rock is negligible, and the influence of structural stress on the primary migration of oil and gas is very weak, which can not be the main driving force of the primary migration.

Key words: tectonic stress, primary migration, dynamics, pore pressure, source rocks

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