CAJ | 학술논문

　　研究石煤(腐泥煤)的孔渗特征，对于深入了解页岩气的吸附/解吸特征具有重要意义。基于分形几何原理，推导出煤岩不同类型孔隙和毛细管压力曲线的分形几何模型，并将孔隙分形维数分为渗透分维数和扩散分维数分别计算。根据压汞实验数据分析，利用双对数图计算了安康地区石煤孔隙结构的分形维数。研究结果表明：石煤渗透分维数Ds介于2.524~2.917，其与挥发分产率、水分含量、灰分产率和迂曲度呈正相关关系，与变质程度及平均孔径呈负相关关系；扩散分维数Dk介于2.488~2.931，其与变质程度、挥发分产率、水分含量和平均孔径呈正相关关系，与灰分产率和迂曲度呈负相关关系；在物性方面，渗透分维数随孔隙度增大而减小，渗透性的分形表征与扩散分维数呈负相关关系，这说明渗透孔越不均一，煤岩孔隙度就越大，而扩散孔的均一化程度可以为评价石煤储层物性提供重要依据。
　　연구석매(부니매)적공삼특정，대우심입료해혈암기적흡부/해흡특정구유중요의의。기우분형궤하원리，추도출매암불동류형공극화모세관압력곡선적분형궤하모형，병장공극분형유수분위삼투분유수화확산분유수분별계산。근거압홍실험수거분석，이용쌍대수도계산료안강지구석매공극결구적분형유수。연구결과표명：석매삼투분유수Ds개우2.524~2.917，기여휘발분산솔、수분함량、회분산솔화우곡도정정상관관계，여변질정도급평균공경정부상관관계；확산분유수Dk개우2.488~2.931，기여변질정도、휘발분산솔、수분함량화평균공경정정상관관계，여회분산솔화우곡도정부상관관계；재물성방면，삼투분유수수공극도증대이감소，삼투성적분형표정여확산분유수정부상관관계，저설명삼투공월불균일，매암공극도취월대，이확산공적균일화정도가이위평개석매저층물성제공중요의거。
The study of pore penmeability characteristics of stone coal(sapropel coal)has great significance for deepened understanding of adsorption and desorption of shale gas. On the basis of the principle of fractal geometry, the fractal models for describing the different types of pore size and capillary pressure curve were developed and fractal dimension was divided into the penetration fractal dimension and the proliferation fractal dimension. Ac-cording to the capillary pressure data, the fraction dimension is calculated on a log-log plot of intrusion volume versus pressure. The results show that the penetration fractal dimension(Ds) is from 2.524 to 2.931, and has positive relationship with volatile matter ratio, moisture ratio, ash content and tortuosity, while negative relationship with metamorphic grade and mean pore diameter. The proliferation fractal dimension(Dk) is from 2.400 to 2.934, and has positive relationship with metamorphic grade, volatile matter ratio, moisture ratio and mean pore diameter, and negative relationship with ash content and tortuosity. In the respect of physical properties of bone coal, the pene-tration fractal dimension increases with porosity, permeability and proliferation fractal dimension is negatively correlated. This shows that the more heterogeneous penetration hole, the greater the porosity of coal, and the degree of uniformity of the diffusing pore is important to the permeability transformation in reservoir.