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Diagenesis Constrain to Physical Property of Permian Conglomerate Reservoir in Underlying Block of Kebai Fault

ZHANG Shun-cun1,YANG Zhao-chen2,LIU Zhen-yu3,LIU Wei3,WANG Long-gang4,SHI Ji-an1,LU Xin-chuan1(1.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy ofSciences,Lanzhou 730000,China;2.Fengcheng Field Operation District,PetroChina Xinjiang Oilfield Company,Karamay 834000,China;3.Institute of Exploration and Development of Xinjiang Oil Company,Karamay 834000,China;4.Qinghai Oilfield Company No.1 Production Plant,Dunhuang 736202,China.)  
In the Permian detrital reservoir in the underlying block of Kebai fault,the main reservoir rock is composed of fine conglomerate and sandy conglomerate,with good physical property in Xiazijie Formation and poor property in Fengcheng and lower Wuerhe Formations.Based on core observation,rock slice and scanning electron microscope(SEM),we discussed the diagenesis constrain to the physical property of sandy conglomerate reservoir as follows:Compaction is negative to physical property of reservoirs;cementation performs the double actions depending on different quantity of cement matters;dissolution is positive to make secondary porosity and fracture as well as connectivity with pores.
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