CAJ | 학술논문

采用物性分析、薄片观察、扫描电镜、常规压汞等方法，对低渗透储层特征及孔隙结构进行了研究．并探讨了孔隙结构对低渗透储层物性的影响。结果表明：储层孔隙类型有残余粒间孔隙、溶蚀孔隙、晶间孔隙、微裂缝，以溶蚀孔隙为主要类型；喉道类型以细喉道为主；孔隙结构以中孔-细喉道型为主，其次是小孔-细喉道型、大孔-中粗喉道型；孔喉半径越大，低渗透储层的渗透性越好；分选系数和歪度系数反映了低渗透储层喉道大小不均一、类型多样及储层微观非均质性强的特点。
채용물성분석、박편관찰、소묘전경、상규압홍등방법，대저삼투저층특정급공극결구진행료연구．병탐토료공극결구대저삼투저층물성적영향。결과표명：저층공극류형유잔여립간공극、용식공극、정간공극、미렬봉，이용식공극위주요류형；후도류형이세후도위주；공극결구이중공-세후도형위주，기차시소공-세후도형、대공-중조후도형；공후반경월대，저삼투저층적삼투성월호；분선계수화왜도계수반영료저삼투저층후도대소불균일、류형다양급저층미관비균질성강적특점。
The property analysis, thin sections, scanning electronic microscope and mercury injection tests were applied to study the characteristics of low permeability reservoir and pore structure and discuss the effect of pore structure on physical properties of low permeability reservoir. The result shows that the pore types include residual intergranular pores, dissolved pores, intercrystalline pore and micro-fracture,dominated by dissolved pores. Fine throat is the main throat type. Pore throat structure is mainly of middle pore-thin throat, followed by eyelet-thin throat and macropore-medium throat. The greater the pore throat radius is, the better the permeability of low permeability reservoirs is. Sorting coefficient and skewness show the characteristics of low permeability reservoirs such as various types of throat, different sizes and strong microscopic heterogeneity.