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孔隙结构研究是油藏精细描述、储层综合评价的重要内容,采用铸体薄片、扫描电镜、铸体图像分析、高压压汞和恒速压汞等多种技术手段,对鄂尔多斯盆地宁51区长2储层孔隙结构特征进行了深入分析和研究。宁51区储层具有中低孔、中低渗储层的特征。长2储集空间主要为粒间孔,其次为长石溶蚀孔,为小孔中细喉、细喉孔喉组合。孔隙结构特征是影响储层流体的储集能力和开采油气资源的主要因素。
The study of pore structure is an important part of reservoir description and reservoir comprehensive evaluation. By means of casting thin slices, scanning electron microscope, image analysis of castings, high pressure mercury intrusion and constant pressure mercury intrusion, The pore structure of Chang 2 reservoir has been deeply analyzed and studied. The reservoirs in Ning 51 area have the characteristics of middle-low porosity and medium-low permeability reservoirs. Long 2 reservoir space is mainly intergranular pores, followed by feldspar corrosion pores, small holes in the throat, throat throat combination. Pore structure characteristics are the main factors affecting the reservoir fluid storage capacity and oil and gas exploitation.