沉积相对储集层质量的控制作用——以黄骅坳陷王官屯油田枣Ⅱ、Ⅲ油层组为例

王官屯油田位于黄骅坳陷南部，古近系孔店组孔一段枣Ⅱ、枣Ⅲ油层组是其主力含油层系，储集层主要为砂岩，但其储集层质量差异很大，同一层段有的含油，有的却为干层。研究发现，储集层质量的巨大差异主要是沉积环境的差异引起的，物性好、含油的砂岩为高能河道沉积，砂岩泥质含量低，分选较好，粒度较粗，原生粒问孔隙发育；物性差、干层的砂岩是低能河道沉积，砂岩泥质含量高，分选差，粒度较细，孔隙不发育。辫状河中的高能河道是有利储集层发育相带。图8参10

Control of sedimentary facies on reservoir quality-An example from Zao Ⅱ and Ⅲ oil sets in Wangguantun Oilfield,Huanghua Depression

Wangguantun Oilfield is located in the southern Huanghua Depression.The Zao II and III Paleogene oil sets are the major production beds,and the reservoirs are mainly sandstones with different quality.The study shows that the difference results from the different sedimentary environments.The sandstones with oil and good reservoir quality are deposited in high-energy channels of braided river.They are low in mud content,good in sorting and relatively coarse in grain size.Primary porosity is developed.The sandstones with no oil and poor reservoir quality are deposited in low-energy channels.They are high in mud content,poor in sorting and relatively fine in grain size.Porosity is not developed.High-energy channels are favorable facies for good reservoirs.