新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (4): 372-375.

• 油气勘探 • 上一篇    下一篇

二连盆地乌里雅斯太凹陷南洼槽油气运移特征

肖伟1, 刘震1, 党虎强1, 杜金虎2, 易士威2   

  1. 1.石油大学石油大然气成藏机理教育部重点实验室,北京102249;
    2.中国石油华北油田分公司,河北任丘062552
  • 收稿日期:2003-09-17 修回日期:2004-01-10 发布日期:2021-01-06
  • 作者简介:肖伟(1976-).男,陕西台阳人,在读博士研究生,地质资源与地质工程:联系电话:010-89733505

Petroleum Migration of South Trough in W uliyastai Sag, Erlian Basin

XIAO Wei1, LIU Zhen1, DANG Hu-qiang1, DU Jin-hu2, YI Shi-wei2   

  1. 1. Key Laboratory of Hydrocarbon Accunulation Mechanism, Ministry of Education, University of Petroleum, Bejjing 102249, China;
    2. Hnabei Oilfield Company, PetroChina, Renqiu, Hebei 0625552, China
  • Received:2003-09-17 Revised:2004-01-10 Published:2021-01-06

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摘要： 在油气藏的形成过程中,油气运移始终起着重要的作用,乌里雅斯太凹陷南洼槽整体上断层规模小、延伸距离短。受湖底扇沉积环境的制约、砂体横向连通性差,不整合成为优势运移通道,油气沿着由高孔渗砂体一次生断层一不整合面构成的输导体系进行运移。该凹陷地层压力系数基本在10左右,具静压系统,且纵向上为统一压力系统。平面上较强的孔隙流体动力场控制油气运移方向,油气藏发育主要在能量相对较低的低压和现今油势低值区内。

关键词: 二连盆地, 坳陷, 输导系统, 常压, 油气运移

Abstract: Hydrocarbon migration always plays an important role in process of oil-gas accumulation. The south trough in Wuliyastai sag is char-acterized by small-sized and short-extending faults, poor plane connectivity of sandbodies under the control of sedimentary environrnent of subla-custrine fan, So lnconformity could be its dominant channel for hydrocarbon migration, and the hydrocarbons probably migrate along the conduct-ing systern composed of high porosity permeability sand body-secondary fanlt-unconformity. The sag has been found to possess static pressure system, vertically unified pressure system with formation pressure factor of about 1.0, horizontally more intensive pore fluid dynamic field to con-trol oil-gas migration directions. The study suggests that the oil gas reservoirs are mainly formed in low pressure areas with relative low energy.

Key words: Erlian basin, depression, conducting system, normal pressure, hydrocarbon migration

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