Stress seismic prediction based on anisotropic equivalent medium theory
With the technological development of unconventional oil and gas exploration and development,especially the need for efficient shale oil and gas extraction,accurate stress prediction is crucial for designing shale horizontal well trajectories and selecting favorable fracturing areas.In order to obtain the stress magnitude and direction,firstly,we should get the elastic parameters and fracture rock physics parameters;we carry out the high-precision pre-stack AVAZ inversion using wide-azi-muthal seismic data based on the anisotropic equivalent medium theory and then driven by the anisotropic rock physical model of shale.Secondly,combined with the stress prediction model,we realize the quantitative prediction that includes the magni-tude and direction of the stress.The theoretical model test and practical data application show that this stress prediction meth-od has high accuracy,the results of stress prediction conform to the geological rule,and have good consistency with the results of micro-seismic fracturing monitoring and log data.It can effectively guide the shale horizontal well trajectory design and frac-turing scheme deployment.
shale oil and gasstressanisotropyAVAZ inversiondifferent horizontal stress coefficientstress di-rection
国家科技期刊平台
NSTL
万方数据
