Buckle Village Oilfield Of Qikou Sag In Permian And Tertiary Reservoir Research

This paper mainly studies Buckle village oil field reservoir. According to reservoir lithology, electrical characteristics and the cycle of comparison method, I divide the layers. Combined with the reservoir sedimentary characteristics, ancient fossils and ancient structure, climate environment, this paper describes the characteristics of sedimentary facies. Application of cast thin section, scanning electron microscope, cathodoluminescence and capillary pressure, the article divides the pore types.The koucun oil field has Buckle13fault block, buckle9fault block and the buckle11fault block. It has3sets of formation, such as the Permian, Eslx and the Ng Ⅱ,Ⅲ.The Permian reservoir in the buckle11block is delta sedimentary face. Lithology is mainly feldspar quartz sandstone, quartz sandstone. The reservoir is further subdivided into P1, P2, P3, P4, P5, P6, P7reservoir groups. The Eslx reservoir distribution in the buckle13fault block, buckle9fault block and the buckle11fault block. The Ng Ⅱ,Ⅲ reservoir distribution in the buckle11fault block.The main pore type sandstone are intergranular pores, intergranular dissolved pore, feldspar solution openings, debris dissolution pore, intercrystalline pore, and various cracks. Carbonate pore are mainly intergranular pore, particle hole, intercrystalline pore, solution pores and fractures. The reservoir is mainly weak hydrophilic and hydrophilic wettability type.The Permian reservoir belongs to the low permeability micro throat and moderate-strong heterogeneity clastic rock reservoir. The Eslx reservoir belongs to the low permeability micro throat and strong heterogeneity reservoir. The Ng Ⅱ,Ⅲ reservoir belongs to moderate pore and moderate throat, weak medium heterogeneity clastic rock reservoir.