Studying On The Method Of Tight Gas Reservoir Well Log Interpretation Of The East Sulige Gas Field

The tight gas reservoir of He8, Shan1and Shan2section of the east Sulige Gas Field is affect by the depositional environment, diagenesis, stucture and other factors, and reservoirs has the characteristics of low porosity, low permeability, the heterogeneity, nonlinear and complex logging response. Using the logging information, core and testing data research on the characteristics of reservoir sedimentary facies, diagenesis facies and petrophysical facies, after that we analyze and extract the logging response, parameter distribution and Logging evaluation method of all kinds of petrophysical facies. Specially, using Grey Theory logging geological evaluation build evaluation index, evaluation technique and disposal method of petrophysical facies in classification, and using all kinds of screened petrophysical facies build logging reservoir parameter model, which improve the linear relation and precision of the model and overcome the evaluation feature of low SNR and low resolution.By means of analyzing the calculation mode, floor standard and the distribution range and the distinction of lithology, physical properties, log curve and total hydrocarbon gas logging of the tight gas reservoir, we built the Containing gas evaluation index of the different petrophysical facies, and reexamined46wells. The evaluation index divided precisely the Containing gas horizons of the different petrophysical facies, and the result show that there were335newly increased Containing gas horizons, thickness of1095.4m. It newly increased81first kind of petrophysical facies gas blankets, thickness of294m to provide favorable exploration zone and well area for increasing the production.Consequently, it clarified the method of log interpretation and effect, and improved the ability of the tight gas reservoir logging qualitative identification and quantitative evaluation, and it provided effectively strong technical support and guarantee for the tight gas reservoir development.