松南气田登娄库—泉头组天然气成藏特征分析

松南气田位于松辽盆地南部长岭断陷中央隆起带达尔罕断凸带腰英台深层构造高部位.通过分析解剖烃源岩、输导等,认为松南气田登娄库—泉头组天然气藏具有双向供烃的特征;达尔罕断裂是控制气藏规模的主断裂,它的开启与封闭直接决定天然气藏的形成保存及破坏散失.在典型气藏解剖的基础上,综合油气成藏条件,总结了成藏规律：多期生烃,北、西次凹供烃、近距离运移,长期运移指向、聚集,深层储盖组合匹配.

Analysis of Gas Reservoir Accumulation Characteristics of Denglouku and Quantou Formations in Songnan Gas Field

The Songnan Gas Field is located in the high position of the Yaoyingtai deep buried structure,which is situated in the Dae- rhan faulted bump, the central uplift belt in the faulted depression of Changling in Southern Songliao Basin. Through analyzing the characteristics of hydrocarbon source rocks and transportation systems, it is believed that the gas accumulation in Denglouku and Quantou Formation in the Songnan Gas Field is characteried by two-way hydrocarbon supply. The Daerhan fault is the main fault which controlled the scale of the gas reservoirs. The open and close of the Daerhan fault controlled the preservation and destruction of the gas reservoirs. On the basis of analyzing results on gas reservoirs and hydrocarbon accumulation conditions, it is conclued that hydrocarbon accumulation was due to multi-phase of hydrocarbon generation, hydrocarbon supply from northern and western depres- sion, short distance hydrocarbon migration, and excellent matching between reservoirs and seal rocks.