Application of Geophysical Exploration Method in Sedimentary Facies Analysis of Shanxi Formation in Linqing Depression

The core, thin section, logging and conventional logging data are lacked in a certain block of LinQing depression. In order to study its purpose layer in the control action of sedimentary facies of reservoir of shanxi formation, to guide the efficient development of unconventional gas.By using less logging lithology statistical data and combining seismic geophysical method, the characteristics of seismic profile, root-mean-square amplitude and relative wave impedance are analyzed, and the target sedimentary facies are determined. By this geophysical method through the above seismic attribute study, it can be got that the reservoir of shanxi formation contains fluvial-dominated shallow water delta facies and carbonate platform facies, with the main sedimentary microfacies of distributary channel, distributary bay and restricted platform. Delta facies is the main sedimentary facies type and distributary channel is the main microfacies type of effective reservoir development.