The Logging-Reservoir Investigation On Clastic Lithology Of Majing In Western Sichuan

Recently, natural gas was discovered gradually in Majing cretaceous , which displayed shallow stratum have the large exploration and development potentialities. These emphasize the comprehensive research in natural gas of shallow stratum. And this research is very necessary to know the gas-bearing condition and exploration prospect in the western of Sichuan district.To know the gas-bearing condition in shallow stratum, it must do two main works: calculate the store parameter and modeling set and distinguish hydrous and gas.With reference to research of the logging interpretation model, it should exploit fully logging datum and the results of well core experimental analysis which was existed and analyze the relationship between the quality parameter of well core materiality and brothel log, which should further be understood in porosity, coefficient of permeability and water degree of saturation in well-core graduation.With regard to distinguishing containing of the water and gas, the cretaceous is the difficult point on logging interpretation all the time in the Majing of western of Sichuan. It is mainly the diversity of the containing of gas and water is very difficult to distinguish. Gas and water react very closely in the log. The partly gas stratum produce the water in the past logging interpretation method can't distinguish them easily. According to the logging and brothel logging shows and testing results, this thesis will utilize the cross-plot analysis technology to look for the qualification and quantity index of the containing water and gas by mutual comparison, triumphantly discern the containing gas and water quality in the store stratum; Using B-P Network can recognize the reservoir; the utilize the fuzzy cluster analysis technology to cluster analyze separately the water well section and water quality well in the store stratum, settle the type datum and central type distinctly and analyze fluidity's material quality and diversity in all models and others store stratum, triumphantly distinguish the diversity of the containing water and gas. Above the base statement, scientists comment the containing gas quality and point out the helpful the stratum of containing gas and area.