| In this paper, through the study of YiChuan eastern Ordos basin gas accumulation geological factors research, from the stratigraphic division and correlation, the research area of Shanxi group,Taiyuan group, Benxi group distribution characteristics of sedimentary facies and sedimentary environment were studied, at the same time, the evaluation of coal measures hydrocarbon source rock department was accomplished. In the basis of reservoir petrology, mineralogy, diagenesis and physical property analysis, the evaluation of the reservoir was completed. Meanwhile combined with the distribution and characteristics of caprock,favorable reservoir-cap combination has been predicted. By means of reservoir lithology, physical property, gas-bearing and electrical analysis, combined with gas analysis,the research of coalbed methane and the features of tight sandstone gas in this area has been studied.On the basis of accumulation elements study, guided by the oil and gas enrichment regularity, based on the permeability of sand body distribution, through oil and gas shows, test and production data, the study has found that the He8interval is the main production atmosphere,and predicted good areas favorable for oil in He8, Shan1, Shan2reservoir and trap elements. |
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