白云岩声电各向异性实验测量及分析

doi:10.11720/wtyht.2022.1615

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Abstract

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.

Key words： dolomite anisotropy acoustic wave resistivity water saturation

Received: 25 November 2021 Published: 03 January 2023

ZTFLH:

P631.4

Corresponding Authors: LIU Qin-Yuan E-mail: tangjun@yangtzeu.edu.cn;774965375@qq.com

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	Articles by authors
	Jun TANG
	Qin-Yuan LIU
	Qiang LAI
	Yu-Yu WU
	Wei XU

Cite this article:

Jun TANG,Qin-Yuan LIU,Qiang LAI, et al. Experimental measurement and analysis of the acoustic-electrical anisotropy of dolomites[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1492-1499.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1615 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1492

Schematic diagram of horizontal well logging for anisotropic reservoirs

Schematic diagram of core x direction and z direction

Schematic diagram of acoustic pulse transmission measurement

Basic measurement principle diagram of resistivity measuring instrument

Schematic diagram of experimental instrument connection

Statistics of measurement results of core physical parameters

x-direction acoustic waveform diagram of No.2 core

z-direction acoustic waveform diagram of No.2 core

Comparison of acoustic waveform of No.2 core

Statistical table of anisotropy coefficient of dolomite

Statistical table of electrical anisotropy coefficient of dolomite core

Relationship between acoustic velocity anisotropy coefficient and resistivity anisotropy coefficient

Comparison chart of x-direction acoustic waveform of No.1 core with different water saturation

Statistical table of acoustic and electrical anisotropy coefficients of 3 cores with different water saturation

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