POOL-FORMING DYNAMIC PROPERTY OF LITHOLOGICAL OIL-GAS RESERVOIRS IN DONGYING SAG

Zeng Jianhui; Zheng Herong; Wang Ning

doi:10.11743/ogg19980412

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POOL-FORMING DYNAMIC PROPERTY OF LITHOLOGICAL OIL-GAS RESERVOIRS IN DONGYING SAG
Vol. 19, Issue 4, Pages: 326-329(1998)
Online First：25 December 1998，

Published：1998
DOI： 10.11743/ogg19980412
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DOI：

Zeng Jianhui, Zheng Herong, Wang Ning. POOL-FORMING DYNAMIC PROPERTY OF LITHOLOGICAL OIL-GAS RESERVOIRS IN DONGYING SAG[J]. 1998, 19(4): 326-329. DOI： 10.11743/ogg19980412.

摘要

东营凹陷岩性油气藏主要为砂岩透镜体油气藏和砂岩上翘尖灭油气藏。受地层压力的影响

东营凹陷岩性油气藏表现为不同的成藏动力学特征。在正常压力系统

岩性油气藏油气运移的驱动力主要为浮力

油气沿断裂、不整合面或储集岩向上运移并在岩性圈闭中聚集成藏

运移相态主要为游离相;而在异常高压系统

油气运移的驱动力主要为压实和欠压实作用下产生的地层压力差

这种压力差可以驱动油气由高势区向低势区运移并在岩性圈闭中成藏

运移相态主要为混(溶)相和游离相。

Abstract

The lithological oil-gas pools mainly consist of lens shaped sandrock and up-tilted pinching sandrock oil reservoirs in Dongying Sag.The reservoirs show different dynamic characteristics due to the influence of the formation pressure.In normal pressure

the major drive force for oil-gas migration is buoyancy.Oil and gas migrate upward in separate phase along fault

uncomformity and reservoir rock and accumulate in the lithological traps.In abnormal high pressure system

the drive fore is predominantly the formation pressure difference between compaction and uncompaction and that drives oil and gas to migrate and accumulate in the lithological traps.The migrating phase is mainly mixed phase of oil

gas and water or separarte phase.