塔里木盆地东部英南2气藏天然气散失特征  

DISSIPATION CHARACTERISTICS OF GAS IN YINGNAN-2 GAS RESERVOIR IN THE EASTERN TARIM BASIN

作　　者：黄志龙[1] 张振英[1] 陈践发[1] 王招明[2] 肖中尧[2] 

机构地区：[1]中国石油大学教育部"石油天然气成藏机理"重点实验室 [2]中国石油塔里木油田公司研究院

出　　处：《天然气工业》2006年第9期12-13,20,共3页Natural Gas Industry

基　　金："十五"国家重点科技攻关项目(编号:2004BA616A02-01-01-01)的部分研究成果

摘　　要：英南2气藏的盖层是特殊的致密砂岩,天然气来自寒武系—奥陶系,为湿气。对侏罗系砂岩碳酸钙胶结物碳同位素的分析认为有20%的碳酸钙胶结物与天然气散失有关,致密砂岩盖层的形成也与天然气散失有关,甲烷的优先散失和消耗可以导致天然气偏湿。利用天然气运聚动平衡模型模拟了英南2气藏天然气的聚集和散失过程,认为英南2气藏是喜山期以来一直处于天然气储量递减的残留气藏。The seal in Yingnan-2 gas reservoir is specially tight sand and the natural gas is wet gas derived from Cambrian-Ordovician source rocks. Based on carbon isotope analysis of the calcium carbonate cements in Jurassic sandstone, it is believed that gas dissipation was related with 20% of the calcium carbonate cements and the formation of tight sand seal, and the preferential dissipation and consumption of methane resulted in the wet-prone gas. The dynamic equilibrium model is used to simulate the process of gas migration and accumulation in Yingnan-2 gas reservoir. It is believed that Yingnan-2 is a relic gas reservoir, the gas reserves of which have been in declining since Himalayan epoch.

关 键 词：天然气 散失 碳酸钙胶结物 英南2气藏 塔里木盆地 英吉苏凹陷 英南构造带 

分 类 号：P618.13[天文地球—矿床学]