桩西下古生界潜山油藏储集空间类型及其控制因素

Type and Control Factors in Lower Palaeozic Reservoirs in Zhuangxi Buried Hill

通过岩心观察、薄片鉴定以及扫描电镜等分析,查明了桩西下古生界潜山油藏的储集空间类型, 并阐述了其影响因素。研究表明,桩西下古生界潜山油藏发育3类7种储集空间类型,即晶间孔、晶间溶 孔、溶蚀洞、角砾间洞、构造缝、层间缝、压溶缝;影响储集空间发育的因素主要包括构造运动、断裂、 岩性、火成岩侵入体以及剥蚀程度等。根据各储集空间的组合,储层划分为缝洞复合型、裂缝孔隙型及 微孔徽缝型3种类型;目前生产动态资料表明,缝洞复合型、裂缝孔隙型储层为有效储层。

By core observation, section identification, and scanning electron microscopic analysis, the type of Zhuangxi lower Palaeozoic reservoir space in buried hill is clarified and its influence is described. Study shows that 7 types of reser- tion degree. Based on its spatial assemblage, the reservoirs can be divided into fissure-hole type, fissure-pore type and micro pore-fissure. Dynamic production data shows that the pore-fissure type and fissure-hole type are the beneficial reservoirs.