松南无机成因天然气成藏输导体系识别Conducting system identification for inorganic gas reservoir formation in southern Songliao Basin
杨会东,刘立,姚萍,李凌君,杨彦成,乔传乡,褚春梅
YANG Hui-dong1,2,LIU Li1,YAO Ping3,LI Ling-jun2,YANG Yan-cheng2,QIAO Chuan-xiang2
摘要(Abstract)：
松辽盆地南部主要发育北北东、北西两组走向的基底大断裂,受不同时期大地构造环境的影响,表现为伸展、走滑和挤压等多种活动状态。地化指标显示,盆地南部多处发现的高含CO2气藏属于无机成因天然气。通过盆地深部壳幔结构、长岭控陷骨架断裂体系、中浅层CO2气藏及其伴生矿物片钠铝石分布等研究后发现,乾安大断裂及其延伸部分是孙吴断裂在松辽南部的具体表现形式,规模大,切割深,控制了盆地演化与火山发育,作为联系深、浅物质能量交换的纽带,热流底辟体、地壳内岩浆囊和大型犁式断裂诱发的火山岩在空间上的叠合配置,是松南无机成因天然气分布的主要输导体系。
Southern Songliao Basin mainly develops NNE and NW basement large faults.Influenced by tectonic structure in different period,this area appears as several activity forms including extension,strike slip and compression.Geochemical indexes show that high CO2 content gas discovered in southern basin is mostly inorganic genetic gas.Study on deep crust and mantle structure of the basin,Changling rift controlling skeletal faulting system,shallow and middle CO2 gas reservoir and passing associated mineral dawsonite distribution shows that Qian'an large fracture and its extending part is an embodiment of Sunwu fracture in southern Songliao Basin,with a large scale and deep cutting,and controlling basin evolution and volcanic development.As a link of connection deep and shallow material energy exchange,spatial configuration of volcanic rock caused by heat flow diaper body,magma pocket in crust and large scale plough-shape faulting is the main conducting system of inorganic gas distribution in southern Songliao Basin.
关键词(KeyWords)：
基底断裂;CO2气藏;壳幔结构;输导体系
basement faulting;CO2 reservoir;crust and mantle structure;conducting system
基金项目(Foundation):
作者(Author):
杨会东,刘立,姚萍,李凌君,杨彦成,乔传乡,褚春梅
YANG Hui-dong1,2,LIU Li1,YAO Ping3,LI Ling-jun2,YANG Yan-cheng2,QIAO Chuan-xiang2
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