CAJ | 학술논문

依托渭北煤田韩城矿区煤样，采用压汞法和小角X射线散射技术（SAXS），结合孔隙分形表征，从分形特征的角度探讨了构造变形对煤孔隙结构的影响程度。结果表明，煤的孔隙分形维数定量表征了构造煤孔隙结构的差异性变化及其非均质性。强构造变形煤具有较高的渗流孔分形维数（DHg ），孔隙结构及表面非均质性较高，而渗透率较低，说明强烈构造变形所导致的复杂孔隙结构是构造煤储层低渗透的原因之一。吸附孔孔隙表面分形维数（DSAXS ）随着构造变形的增强而增大，表明变形作用造成煤孔隙表面结构在微观上变得复杂。研究认为，分形维数可以指示煤中孔隙结构的构造变形程度。
의탁위북매전한성광구매양，채용압홍법화소각X사선산사기술（SAXS），결합공극분형표정，종분형특정적각도탐토료구조변형대매공극결구적영향정도。결과표명，매적공극분형유수정량표정료구조매공극결구적차이성변화급기비균질성。강구조변형매구유교고적삼류공분형유수（DHg ），공극결구급표면비균질성교고，이삼투솔교저，설명강렬구조변형소도치적복잡공극결구시구조매저층저삼투적원인지일。흡부공공극표면분형유수（DSAXS ）수착구조변형적증강이증대，표명변형작용조성매공극표면결구재미관상변득복잡。연구인위，분형유수가이지시매중공극결구적구조변형정도。
Base on Hancheng Mine coal samples ,Weibei coalfield was elaborated by means of mercury porosimetry combined with small angle X-ray scattering (SAXS) based upon the fractal theory .The results show that the variation characteristics of pore structure and pore heterogeneity of tectonically deformed coals (TDC) can be represented by the fractal dimension D .Strong deformed coals have higher fractal dimension DHg ,higher heterogeneity and more complicated pore structure/surface ,and lower permeability ,indicating that the complicated pore structure resulted from strong tectonic deformation contributes to low permeable coalbed methane reservoir .With the stress strengthening ,fractal dimension DSAXS shows an increasing trend , suggesting that tectonic deformation leads to the complication of pore surface structure .Thus ,the fractal dimension can be used as an indicator of the deformation degree of pore structure .