松辽盆地二氧化碳成因及分布主控因素  

Origin and main control factors of CO_2 in the Songliao basin

作　　者：鲁雪松[1] 宋岩[1] 王兆宏[2] 马淑芳[1] 柳少波[1] 洪峰[1] 

机构地区：[1]中国石油勘探开发研究院 [2]中国石油大学·北京

出　　处：《天然气工业》2009年第3期125-128,共4页Natural Gas Industry

基　　金：中国石油天然气股份有限公司重大科技专项(编号:07-02Z-01-01)的部分研究成果

摘　　要：松辽盆地天然气成因类型复杂,烃类气和CO2大量共存,已发现多个高含CO2气藏。地质和地球化学指标判识表明,松辽盆地高含量的CO2皆来自于上地幔的岩浆脱气。通过对已发现含CO2天然气分布特征的分析,总结了松辽盆地高含CO2天然气分布的五大主控因素:①深部构造背景控制CO2区域分布;②基底大断裂控制CO2区带分布;③中生代火山岩构成CO2深部优质储层;④新生代火山岩浆活动控制CO2气源;⑤区域盖层控制CO2聚集层位。松辽盆地CO2充注成藏期较晚,主要与新生代幔源玄武岩浆活动有关。Genetic types of natural gas in the Songliao basin are complicated. Normal hydrocarbon gas and CO_2 coexist widely. A number of gas reservoirs with high content of CO_2 have been discovered in this basin. Discrimination with geological and geochemical indexes indicates that the high-content CO_2 in the Songliao basin were all sourced from magma degassing in the upper mantle. On the basis of analyzing the distribution characteristics, five main factors controlling the distribution of natural gas with high content of CO_2 are summarized: a. deep tectonic settings controlled CO_2 regional distribution; b. large basement faults controlled CO_2 plays; c. the Mesozoic volcanic rocks constitute high-quality deep reservoirs for CO_2; d. the Cenozoic volcanic and magmatic activities controlled the sources of CO_2; e. regional cap rocks controlled the horizon where CO_2 accumulated. Many evidences indicate that CO_2 charging and pooling occurred late in the Songliao basin and they were mainly related to mantle-derived basalt magmatic activities in the Cenozoic.

关 键 词：松辽盆地 CO2成因 分布 断裂 火山岩 主控因素 

分 类 号：P618.13[天文地球—矿床学]