【摘要】 选取泸州区块龙马溪组页岩为研究对象，基于核磁共振（nuclear magnetic resonance, NMR）实验、场发射扫描电子显微镜（field emission scanning electron microscope, FE-SEM）等手段，对泸州区块深层页岩的孔隙结构进行了分析，并利用分形几何近似方程计算了NMR分形维数，讨论了分形维数与总有机碳（total organic carbon, TOC）、热演化程度、矿物成分含量、孔隙度和渗透率等之间的关系。结果表明：泸州区块页岩广泛发育有机孔、粒间孔、粒内孔及微裂缝；有机孔孔径为10～40 nm,无机孔孔径为20～70 nm; NMR分形维数具有明显两段式特征，束缚流体孔隙分形维数(D_min)与TOC、成熟度、石英含量呈正相关关系，与黏土矿物含量呈负相关关系，可动流体孔隙分形维数(D_max)与石英含量、孔隙度、渗透率呈负相关关系。分形维数将矿物组分、储层物性与储层非均质性联系，研究结果可为深层页岩表征提供依据。更多还原

【Abstract】 Taking Longmaxi formation shale in Luzhou block as a research model, the pore structure of deep shale in Luzhou block is analyzed based on nuclear magnetic resonance(NMR) and field emission scanning electron microscope(FE-SEM) characterization, and the nuclear magnetic resonance fractal dimension is calculated by using the fractal geometry approximate equation. The relationship between the fractal dimension and the total organic carbon(TOC), the thermal evolution degree, the mineral composition content is discussed. Also the relationship between porosity and permeability is studied. The results show that organic pores, intergranular pores, intragranular pores and microfractures are widely developed in shale in Luzhou block; the organic pore diameter is 10～40nm and the inorganic pore diameter is 20～70nm; NMR fractal dimension has obvious two-stage characteristics. Bound fluid pore fractal dimension(Dmin) is positively correlated with TOC, maturity and quartz content, negatively correlated with clay mineral content, and movable fluid pore fractal dimension(Dmax) is negatively correlated with quartz content, porosity and permeability. The mineral composition, reservoir physical properties and reservoir heterogeneity are corelated by fractal dimension. The research results can provide the basis for the characterization of deep shale.更多还原