【摘要】 针对松辽盆地王府断陷泉头组低渗透储层孔隙结构认识不清的问题，运用储层孔隙分形方法，结合X射线衍射、铸体薄片、扫描电镜以及压汞等实验方法，确定了该低渗透砂岩储层的孔隙分型特征，并讨论了分形维数与储层物性、储层矿物组分之间的关系。实验结果表明：该地区储层孔隙以粒间孔和粒内溶孔为主；矿物成分主要为石英和长石；储层孔隙具有多重分形特征，小孔隙的孔隙结构优于中、大孔隙；分形维数与储层孔隙度无关，与渗透率、矿物成分均有良好的相关性。该研究从多重分形理论角度揭示了低渗透储层的孔径分布特征，可为松辽盆地王府断陷泉头组低渗透储层开发提供依据。更多还原

【Abstract】 To address the problem of unclear understanding of the pore structure of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin, the fractal method of reservoir pores was applied in combination with experimental methods such as X-ray diffraction, casting slice, scanning electron microscopy, and mercury intrusion porosimetry, to determine the pore fractal characteristics of the low-permeability sandstone reservoir and discuss the relationship between the fractal dimension and the physical properties and mineral composition of the reservoir. The experimental results showed that: the pores of the reservoir in this area were mainly intergranular pores and intragranular dissolved pores; the mineral components were mainly quartz and feldspar; the pores of the reservoir were of multiple fractal characteristics, and the structure of small pores was better than that of medium and large pores; the fractal dimension was unrelated to the reservoir porosity, but closely correlated with permeability and mineral composition. This study discovers the pore size distribution characteristics of low-permeability reservoirs from the perspective of multiple fractal theory, and provides a basis for the development of low-permeability reservoirs in Quantou Formation, Wangfu Fault Depression, Songliao Basin.更多还原