辽河东部凹陷浅层气成藏控制因素

通过对辽河盆地东部凹陷浅层气藏的研究,说明气藏类型与分布规律主要受断层,背斜构成的闭地质条件所控制。在火山岩体的发育区还受上倾方向火山岩遮挡而形成气藏。非构造型气藏的形成则与上倾尖灭或侧向尖灭砂岩储层有关,但也离不开断裂和构造背影的有机配合。对辽河东部凹陷下第三系东营组,沙河街组浅层气藏富集因素分析认为：生烃源岩是浅层气藏富集的基本条件;良好的盖层是气藏富集的先决条件;储层条件是控制浅气藏富集程度

Control Factors of Shallow Gas Reservoin in East Depression of Liao he Petroleum Exploration Bureau)

Through study the control factors of the shallow gas reservoir of depression in East of Liaohe,reveal the reservoir tupe and distribution regulation were control by geologic setting which were formed by fault and anticline. The volcanic body development region forms gas reservoir as shelter from updip volcanic body. Unstructural gas reservoir fomed are relation with the uplip pinching or lapout sandstone reservoir,but don't have the organic synthesis of repture and tectonic setting. Through analyse lower tertiary system of Dongying Team and shallow reservoir eurich factor of Shahejie Team,the authors think "hydrocarbon source rock is basic condiction of shallow gas reservoir enrich;good overlying formation is precondition of gas reservoir enrich;reservoir condition is important factor to control shallow gas reservoir enriched degree". At the end of this paper,according to Shallow geological structural distinguishing feature of different region in depression in east of Liaohe Oilfield,takes out exploration thinkings and advices,which have act on similar other regions. At the fracture structure that join with the source of gas still hope to find secondary reservoir.