Study On Sedimentary Microfacies Of Member X8-S1 In The Eastern Block Su75 Of Sulige Aera

Sulige gas field is not only the largest natural gas field at present,but also the first world-class reserves of large gas field in our country,and eastern of the block Su75 as high withdrawal area should be pay more attention.but due to its complex geological conditions,reservoir with low permeable member,low abundance and strong aeolotropism,that is seriously restrict the effect of reservoir evaluation and development.Based on the predecessor's achievements,the thesis further work to study sedimentary microfacies of the main reservoir production of Member He8 and Shanl,in order to predict the favorable exploration area.1.Combining with the existing data of the eastern block Su75 research,I think members divide scheme is not clear,there is no a set of complete classification data.The process of this paper with sequence stratigraphy and exploration practice of organic combining,determining the members divide scheme about 5 members of He8 and 3 members of Shan 1.To establish a uniform stratigraphic correlation framework,for a study of sequence stratigraphy.2.By the way of electrofacies analysis,combining with relevant maps to analyze the sedimentary characteristics of Member He8 and Member Shan 1,then to compile sedimentary microfacies study on sedimentary sand body spatial distribution characteristics.To through previous research results that the members of He8 from bottom to up that river channel developments are decrease significantly,the river channels from continuous development into sporadic ribbon development,and inheritance are poorer.Comparing with the river channels of He8,the rivers of Shanl are stable development and strong inheritance.3.In combination with core data,seismic data and physical property data to make the comprehensive analysis of the distribution characteristics of sand body effectively.The main pay fomation in the study area are reservoir for Member 4,5 of He8 and Member 1 of Shan 1,on the basis of the different facies belt of the physical property data,I think point bat and riverbed detainment sedimentation are the best reservoir physical property.Finally to predicted the favorable exploration area.