Evaluation of key parameters of gas-bearing shale reservoir on the plateau in Babaoshan Basin,East Kunlun,Qinghai
The Triassic Babaoshan Formation in Babaoshan Basin,East Kunlun,Qinghai Province is a set of plateau continental clastic rock and volcanic rock deposits,there is currently no effective logging evaluation program for plateau continental mud shale.With reference to traditional shale gas evaluation ideas,the relationship between conventional and imaging logging response characteristics of key wells in the excavation area and core experimental data is evaluated,and key parameters are evaluated:①Based on conventional logging curves,9 rocks are optimized using correlation analysis Sensitivity factor,calculate the volume of 6 main minerals through optimization algorithm;②Use multiple methods such as multiple linear regression based on conventional curve,resistivity-sonic time difference overlap,volume model,uranium content calculation and other methods for total organic carbon calculation(w(TOC))and method Optimization;③Based on the mineral volume model to calculate the matrix porosity of the variable skeleton,the use of micro-electric imaging for crack picking and fracture parameter evaluation,the use of PoroTex image processing technology to describe the development of dissolution pores and fractures,and the array acoustic wave field separation technology Stoneley wave interface reflection,amplitude attenuation calculation and permeability inversion;④Core experiment calibration logging,optimization of key geological parameters,construction of adsorption gas,free gas and total gas content calculation model;⑤Based on array acoustic wave rock Mechanical static conversion parameters and mineral volume models are optimized to evaluate rock brittleness and fracturing properties in suitable areas.The results show that the multi-method optimization results based on the key parameters of logging have achieved high accuracy,and the established regional reservoir quality evaluation standards have solved the difficult problem of gas-bearing mud shale reservoir evaluation and achieved good application results.
East KunlunBabaoshan Basingas-bearing shalereservoir evaluation
万方数据
维普
