Complex Resistivity Anisotropy Response Characteristics of Wufeng-Longmaxi Formation Shale in Southern Sichuan

Electrical exploration has become an important means of shale gas reservoir and evaluation, is expected to play a key role in the later stages fracturing development. At present, research on electrical response characteristics reservoirs their relationship with parameters extensive in-depth, but there little complex resistivity anisotropy influencing factors, which restricts petrophysical modeling parameter prediction, reduces reliability evaluation by electromagnetic methods. In this paper, samples from Longmaxi Formation Wufeng wells southern Sichuan were collected, 34 shales bedding direction vertical measured, induced polarization (IP) extracted inversion. The under different temperature pressure conditions analyzed, factors laws revealed. Combined test results porosity permeability, model resistivity, polarizability permeability was established. have formed set testing methods analysis techniques for reservoirs, are mainly based testing. It helpful understand Sichuan; will provide theoretical physical basis monitoring exploration.