Study on damage mechanism and protection drilling fluid for coalbed methane
Abstract：Firstly,damage mechanisms of coalbed methane reservoir in Qinshui Basin of Shanxi Province were comprehensively analyzed by X-ray diffraction(XRD),Scanning Electron Microscope(SEM),liner swelling test and hot rolling dispersion experiments,thin-section analysis,mercury penetration analysis,wettability measurement and evaluation of sensitivity.Based on this work,pertinent protection counter-measure study were conducted,the surface wettability modifier SD-905 and water sensitivity inhibitor SMYZ-2 were selected out,and then drilling fluid for coalbed methane reservoir in Qinshui Basin of Shanxi Province composed of 0.4%SD-905+0.5% SMYZ-2 was developed,which has minimal damage to permeability of ingredient under hygrometric state.
Keywords：coalbed methanedamage mechanismreservoir protectiondrilling fluidsurface wettability
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1717-1721 )