浅析八面河地区孔店组成藏主控因素

Main Factors Controlling Hydrocarbon Accumulation in Kongdian Formation in Bamianhe

八面河地区孔店组成藏条件良好,但勘探及认识程度较低,油气成藏控制因素不明确,制约了进一步的勘探。分析该区孔店组的构造、地层、沉积、储层等基本地质特征,解剖油气成藏条件,研究成藏控制因素,总结油气分布特征。发现古地貌格局、不整合面、断裂、砂体、鼻状背景为孔店组油气成藏的五大主要控制因素,其中洼隆相间的古地貌特征控制沉积、储层的展布及圈闭的发育类型,不整合面、断层及砂体的有效组合控制孔店组的油气运移,鼻状背景、断裂展布控制油气的富集。

Although Kongdian Formation in Bamianhe has a good condition for hydrocarbon accumulation, controlling factors are uncertain because of low level of exploration and acquaintance, which has constrained further exploration. Through analyzing and studying Kongdian Formation＇s general geologic features of structure, stratum, deposition and reservoir, its hydrocarbon distribution and its condition for hydrocarbon accumulation, This paper has found out five main factors controlling hydrocarbon accumulation： palaeogeomorphology pattern, plane of unconformity, frac- ture, sand body as well as nose structure. Up--and--down ancient landform controls its deposition. Hydrocarbon distribution and trap＇s development type, plane of unconformity, fracture and efficient combination of sand body are responsible for its oil--gas migration while nose structure and fracture pattern affect its oil--gas gathering.