吐哈油田魯克沁東區(qū)梧桐溝組儲層特征研究
[Abstract]:Aiming at the problem that the reservoir characteristics of Wutonggou formation in the eastern part of Lukeqin are not clear and the research degree is not deep, this paper expounds the methods and ideas of reservoir characteristics research, and makes a systematic study. The stratigraphic division and correlation are carried out, the sequence characteristics of the reservoir in the Wutonggou formation are defined, the stratigraphic positions in the area are divided and correlated in detail, and the geophysical data are explained in detail, and the structural characteristics of the eastern part of Lukeqin are clarified. Then, the reservoir characteristics are analyzed, including sedimentary characteristics, reservoir spatial characteristics, reservoir types, the relationship between four properties and so on, and the main controlling factors of reservoir development are defined. Finally, the reservoir parameter modeling method and reservoir discrimination standard are given. The results show that the fault pattern of the Wutonggou formation in the east of Lukeqin is mainly in the north west direction and supplemented by the north east direction fault. The strata generally incline northwestward and the southeastern part is eroded, forming tectonic-lithologic (stratigraphic) and lithologic traps. The sedimentary environment is littoral shallow lake environment, mainly developed fan delta front subfacies, front subfacies mainly developed underwater distributary channel and interdistributary channel microfacies. The reservoir lithology is generally coarser, mainly composed of sandy gravel, conglomerate and fine sandstone, and the Wutonggou formation in the eastern part of Lukeqin shows strong intralayer, interlayer and plane heterogeneity. The reservoir of the Wutonggou formation is abundant in oil source and favorable in structure. The effective migration channel of oil and gas and the perfect assemblage of reservoir and caprock are the main controlling factors for the development of the reservoir. The reservoir of the Wutonggou formation is of medium and deep depth, long span and small length of oil bearing section. The single oil layer is composed of medium thick layer and thick layer, which is composed of -high porosity, medium-high permeability oil layer, and belongs to abnormal low temperature and abnormal high pressure system. It is a structural-lithologic (stratigraphic) heavy oil reservoir. The methods and achievements of this paper can provide favorable technical support for further exploration in Lukeqin area.
【學位授予單位】:東北石油大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:P618.13
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