The Original Town - The Jingchuan On Behalf Of Jiaping Block In Reservoir Evaluation And Oil Analysis

Reservoir is the main study object of oil and gas exploration and production, and that the valuation of reservoir is the most important content of reservoir description. In my thesis, the study object is the sand body of Yanchang group in the area of Daijiaping, Zhenqing borough in the south of Erdos basin. Based on the study of the predecessors, with the data of lithology,physical characteristic,electrical characteristic and test information in the area of length 6, length 8 layers, I have made a further study on every feature of reservoir bed and the relationship, the communication and the containing oilness among the smaller layers of sand body, and further analyze the characters of bearing oil and the standard of identifmg oil ,which have value for exploration and exploitation of reservoir.The Yanchang group of Daijiaping area is fluvial faces and the river direction is from southwest to northeast. The stratum is varied from bottom to top in three layer-members, Iength8, Iength7, Iength6. Primarily, the lithology of Iength6 is quartzose sandstone and the lithology of Iength8 is arkose , the granularity of reservoir is the fine sand stage. And the reservoir is the less poral and percolating dense reservoir, porosity is distributed from 2% to 18.7%, 10.84% on average , from 8% to 12% at most time, and whose permeability is distributed from 0.008 to 6.15×10^-3 μm² , 0.462×10^-3 μm² on average, from 0.1 to 0.5×10^-2 μm² at most time,its pore structure is bad with heavy aeolotropism . The sand body of Length8 and the Lenth6 is comparatively thicker in the parent creek. The thickness of sand body varied greatly in both length and breadth. The sand body of Length6 is thicker than that of Length8, while at most time the single sand body of Length8 is thicker and better-connected than that of Length6. In breadth, sand bodies in the primary creek are better connectedness.The areas of Length8 are the main producing layers, on the top of which have a cover of thicker and better-connected oil pool. The oil layers mainly lie in the area of Zhentan 1 well,Zhentan 4 well,Zhenping 1 well,Zhenping 2 well,Zhenping 3 well and Honghe 1 well. The apparents of oilness are very good ,but the characters of oilness are very bad. he characters of oilness are close relationship with the feature of sediment faces, lithology, electrical characteristic and physical characteristic, is distributed in the middle of this area. The study consider that Iength6 has some developing potential. Therefore we should make more exploration about it .According...