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。
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.
出处
《天然气地球科学》
EI
CAS
CSCD
2003年第5期362-365,共4页
Natural Gas Geoscience
基金
十五"国家重点科技攻关项目(编号:2001BA605A-02-03-03-04)资助.
关键词
塔里木盆地
库车坳陷
天然气
高压封存箱
成藏模式
Tarim basin
Kuqa depression
Overpressure
Fluid compartment
Entrapment pattern.
