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《Journal of Northeast Petroleum University》 2017-06
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Interlayer identification and distribution of Triassic lower oil group in block 9 of Tahe oilfield

He Tingting;Duan Taizhong;Zhao Lei;Hu Song;Li Yanhua;Petroleum Exploration and Production Research Institute,SINOPEC;Postdoctoral Station,China University of Petroleum (Beijing);  
The interlayer identification and distribution in thick sandstone of Triassic lower oil group in block 9 of the Tahe oilfield are not clear enough. Based on detailed observation of core,well-logs and dynamic data,combined with the resistivity curve inversion of horizontal well,the interlayer identification and inter-well contrast analysis in the block 9 are studied by the vertical well and the horizontal well. On that basis,combined with the quantitative statistical analysis of interlayer parameters and the distribution of sedimentary facies,the spatial distribution of interlayer is analyzed. The result shows that the interlayer in the study area can be classified into two types of muddy and calcareous,and the plane distribution range of the interlayer is determined through the qualitative identification of single well and the resistivity curve inversion of horizontal well. Interlayers are lenticular and long striped with the thickness and the sizes are different,and the distribution is scattered and the continuity is poor. The muddy interlayer mainly belongs to the over-bank sediment of the distributary channel in the braided river delta plain and the braided river delta front,controlled by sedimentary microfacies,and distributes along the source. However,the calcareous interlayer is relatively developed and mainly distributes in the braided delta front sedimentary environment. The interlayer analysis results provide reference for the research of remaining oil distribution in the later period.
【Fund】: 国家科技重大专项(2016ZX05033-003-002)
【CateGory Index】: P618.13
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