摘要
克拉2气田是一个大型、特高丰度、高产、超高压优质气田。该气田出现在南天山山前逆冲带,成藏机制十分特殊。运用近代石油地质学理论,特别是油气系统和流体封存箱的概念、方法对克拉2气田的成藏机制进行研究后认为:位于库车富气油气系统中心地带和活跃的气源补给、卓越的封盖层、良好的储层、比较完整的背斜圈闭、畅顺的油气充注通道(主要是断裂)等成藏要素的有序耦合以及晚近期至今源岩处于生气高峰阶段("活气源")和异常流体压力封存箱内载气水循环对流作用是该气田天然气聚集成藏的主要有利条件。
Kela 2 gas field——a grant, abundant, super\|overpressure,larger producer,high quality gas field distributing in the southern!Tianshan Thrusting zone,has been with quietly special reservoir\|forming mechanism. The reservoir\|forming mechanism of Kela 2 gas field was researched, Used the recent petroleum geological theory, emphasizing the concept and method of petroleum system and fluid compartment. Its excellent forming conditions of Kela 2 gas field were that located in the center of Kuqe rich\|gas petroleum system, and coupled of five factors\|active gas replenishment, predominant cap rock, favorable reservoir rock, rather integrated anticline trap and smooth charging\|pathway, and the late\|stage enrichment and reservoir forming. Its reservoir\|forming circumstance was the super\|charging\|high impedance petroleum system. High speed sediment fill and intense extrusion of Tianshan mountain southerly in the late stage of the Himalaya cycle resulted in the super\|over pressure gas pool of Kela 2 gas field. The over\|pressure affect become stronger as a result of the rapid tectonic uplifting in shore time in recent stage. The reservoir forming mechanism of convection reservoir forming from water carried gas in overpressure compartment would be reservoir forming mechanism.
出处
《天然气地球科学》
EI
CAS
CSCD
2003年第5期354-361,共8页
Natural Gas Geoscience
关键词
塔里木盆地
克拉2气田
成藏机制
流体封存箱
油气系统
天然气聚集成藏
Tarim basin
Kela 2
Gas field
Mechanism of convection reservoir-forming from water carried gas
Petroleum system
Fluid compartment.
