徐家围子断陷徐东地区气藏控制因素研究

徐家围子断陷徐东地区气藏控制因素复杂,本文从构造、烃源岩、储层三个方面对气藏进行了解剖,结论如下：断裂是深部天然气运移成藏的主要通道;烃源岩与火山岩储层合理匹配是形成大气田的基础;岩性以酸性火山岩类为主,孔隙和裂缝是火山岩的主要储集空间,爆发相储层最为发育,溢流相具有一定的储集能力;气藏流体分布上气下水,没有统一的气水界面,为岩性气藏。

Study on Control Factors of Gas Pools in Xudong area of XJWZ Fault Depression

Gas pools are very complex in Xudong area of XJWZ Fault Depression.This article mainly focuses on structural,source rock and reservoirs.The gas pools are interpreted and some conclusions are got： faults are the main channels of deep gas migration;Fair match between source rock and volcanic reservoirs is the basis of forming of big gas fields;Lithology is mainly acid volcanic rocks;Pore and fracture are storing space;Eruption faces are good reservoir and flooding faces also have some storing space;Fluid distribution of gas pools is up gas and down water and no unique layer of gas and water.The gas pools are lithologic in Xudong area of XJWZ fault depression.