Logging Evaluation Of Fu Yang Reservoir In Wang Jia Tun Gas Field

The fault in the Wang Jia Tun gas field is mainly composed of two parts,namely the Fuyu oil layer and the Yang Da Cheng Zi oil layer.In this area,the strata of the Fu and Yang reservoir have lower salinity,mostly channel sand and sand dams,mainly with low porosity,low permeability and ultra-low permeability reservoirs,and micro cracks in the formation.Therefore,the combination of conventional acoustic time difference logging and resistivity logging has poor stability in identifying gas and water layers.This study is mainly based on logging response characteristics and development of geological analysis method to identify the gas and water layer in the Wang Jia Tun gas field.Firstly,by optimizing the logging series,the series of lithology,porosity and resistivity logging are optimized respectively,and the order of the sensitivity of logging response characteristics is determined.In addition,the depth correction of porosity and sonic time difference curve,core analysis mud content and natural gamma curve is carried out by core analysis,so that the core data and logging curves have a good correspondence relationship.Secondly,by carrying out the research on the "Four Relations" of the reservoir in Wang Jia Tun,the characteristics of the reservoir in lithology,oil and gas,electricity and physical properties are analyzed,and the relationship between them is studied in depth,and the reservoir characteristics,especially the electrical characteristics,are studied.Thirdly,through the study of the interpretation method of reservoir parameters,we can optimize the data processing of test gas and coring,the effective construction of the clay content interpretation model,the effective construction of the effective porosity interpretation model,and the effective construction of the lithology,physical property and gas saturation parameter interpretation model are realized.By using the double porosity difference method,combined with the oil and gas reservoir effective thickness standard,and the reservoir logging response characteristics,the interpretation process of the Wang Jia Tun gas reservoir is clearly defined,and the comprehensive classification standard of the Fuyang and Yang reservoir is established,which has a good effect on promoting the improvement of the recovery rate.Finally,through the evaluation of the production capacity of the gas wells in Wang Jia Tun gas field,it can effectively guide the division of single well reservoir,the selection of oil test scheme,the implementation of the preliminary perforation,test gas and the later production increase measures in the process of future gas field development,and provide the guarantee for the effective development of the gas field economy.