Experimental measurement and analysis of the acoustic-electrical anisotropy of dolomites
TANG Jun1(), LIU Qin-Yuan1(), LAI Qiang2, WU Yu-Yu2, XU Wei1
1. College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China 2. Exploration and Development Research Institute,PetroChina Southwest Oil and Gas Field Company,Chengdu 610041,China
The dolomites in the Dengying Formation in the Gaoshi-Moxi area,Sichuan Basin have strong anisotropy,causing great differences in acoustic and resistivity curves measured at horizontal and vertical wells and unclear interpretation of logging response rules,thus affecting the application performance of the horizontal well technique in actual reservoirs.With the dolomite outcrops in the Gaoshi-Moxi area as a case study,this study designed and conducted the synchronous measurement experiments of resistivity and acoustic waves of cores in different directions under high-temperature and high-pressure conditions and analyzed the experimental relationship between acoustic and electrical anisotropy coefficients.The experimental results show that there was a positive linear correlation between the two coefficients at 60℃ and 60 MPa.Specifically,with an increase in water saturation,the compressional wave velocity increased,the resistivity decreased,and acoustic and electrical anisotropy coefficients increased.This result provides an experimental basis for the correlation analysis of acoustic-electrical anisotropy and the correction of the differences in the acoustic waves and resistivity.
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doi: 10.1190/1.1441006
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