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塔里木盆地库车坳陷天然气高压封存箱

THE OVERPRESSURE COMPARTMENTS ON NATURAL GAS OF KUQA DEPRESSION IN TARIM BASIN

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【作者】 徐士林吕修祥周新源马玉杰杨明慧刘洛夫

【Author】 XU Shi\|lin1,2,Lü Xiu\|xiang1,2,ZHOU Xin\|yuan1,3,MA Yu\|jie1,3,YANG Ming\|hui1,2,LIU Luo\|fu1,2(1. Basin and Research Center,University ofMechanism in Ministry of Education,University of Petroleum,Beijing 102249,China;3. Branch of Tarim Oilfield Company,CNPC,Kverle 841000, China)

【机构】 石油大学盆地与油藏研究中心石油大学盆地与油藏研究中心 北京102249石油大学石油天然气成藏机理教育部重点实验室北京102249北京102249中国石油塔里木油田分公司新疆库尔勒841000

【摘要】 流体封存箱的概念为正确认识盆地油气运移和聚集过程以及油气分布规律提供了一种新的思维。库车坳陷的纵向压力结构表现为逐层升高的3层台阶式(3带式)压力结构,说明该地区存在流体封存箱。其中:封存箱的顶板由第三系的膏盐岩和含膏泥岩地层构成,该顶板明显地受岩性控制,不具有近水平、穿时代和穿岩性的现象;顶板之下是具有异常高压力的产气层段;封存箱的边部封隔带由断层来充当。库车坳陷高压气藏的成藏机制决定了该地区的高压气藏属于箱内运聚成藏模式。

【Abstract】 The concept of fluid compartment offers a new thought to accurately understand the petroleum migration and accumulation processes and distribution law in basin. The longitudinal pressure of Kuqa depression can be divided into three zones and characterized by three steps rising gradually by layer. This kind of difference obviously indicates that the fluid compartments occur in this area. The top sealing layers of the compartments are composed of gypsolyte and salt rock and gypsum\|bearing mudstone of Tertiary system. They are controlled by lithology and not characterized by horizontal distribution, diachronism and transformation. The gas producing intervals with overpressure are overlain by the top sealing layers. The faults act as the side sealing boards of the fluid compartments. The entrapment mechanism of the overpressure gas reservoirs determines that the overpressure gas reservoirs belong to the entrapment pattern inside compartment.

【基金】 十五"国家重点科技攻关项目(编号:2001BA605A-02-03-03-04)资助.
  • 【文献出处】 天然气地球科学 ,Natural Gas Geoscience , 编辑部邮箱 ,2003年05期
  • 【分类号】P618.13
  • 【被引频次】24
  • 【下载频次】400
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