摘要
利用岩心观察、薄片鉴定和多种分析测试资料对靖边气田储层孔隙结构进行系统研究,表明靖边气田风化壳储层主要发育晶间孔、晶间溶孔、膏盐晶模孔和溶孔等4种孔隙类型和成岩收缩缝、硬石膏水化胀裂缝、溶解缝、岩溶坍塌缝、压溶缝、角砾缝、构造缝等7种裂缝类型。图版观察和统计表明,岩石中孔径较大的膏盐晶模孔和溶孔对油气富集有利,成岩收缩缝和溶解缝能有效沟通储层提高气井产能。气田储层整体的孔喉组合主要为细孔-小喉型,其中主产层孔隙结构整体偏好,为粗孔-大中喉型。
By using core observation, thin section identification and various analysis test data of JingBian gasfield, the research of pore structure has been carried out. The research results show there are mainly 4 kinds of pore types, such as intercrystal pores, intercrystal solution openings, cream salt crystal die hole and solution pores, and 7 kinds of fracture types, such as diagenetic shrinkage joint, anhydrite hydration expansion crack, and dissolved seam, karst collapse sewing, pressolution sewing, breccia seam, structure seam developed in the weathering crust reservoir of JingBian gasfield. Chart observation and statistics show that the rock aperture large cream salt crystal die hole and solution pores are favorable for oil and gas enrichment, while diagenetic shrinkage joint and dissolved seam can make the reservoir effectively be communicated and then improve gas well productivity. The general pore-throat combination of gasfield reservoir is the fine pore- small throat type, in which the pore structure of main producing layer, coarse pore-large and medium throat type, is good.
出处
《石油地质与工程》
CAS
2012年第5期29-31,158,共3页
Petroleum Geology and Engineering
基金
国家重大专项"复杂油气田地质与提高采收率技术"(2008ZX05009-004-03)
