马厂油田沙三段储层微观特征研究

STUDY OF MICROSCOPIC CHARACTERISTICS OF SANDSTONE RESERVOIRS IN THE SHA-3 MEMBER IN THE MACHANG OIL FIELD

马厂油田沙三段储层以中—细粒长石砂岩为主。利用岩芯观察、岩石薄片、粒度、物性、扫描电镜、X光衍射、压汞和孔隙结构象分析等资料,对砂岩的岩石成分、成岩特点、成岩序列、孔隙类型、孔隙演化、孔隙结构和储层潜在敏感性等进行了研究。在此基础上,对储层作了分类评价。

The reservoirs of the sha-3 member in the Machang Oil Field is composed mainly ofmedium-to fine-grained arkose. On the basis of a study of the cores, thin sections,grain size, SEM, physical properties, X-ray diffractions, capillary pressures and diagram analy-sis of the pore structure, the paper discusses the lithological composition, diagenetic fea-tures, pore types, evolution and structures and potential sensitivity to reservoir conditionsof sandstones. On that basis, an evaluation of classification of the sandstone reservoirs hasbeen made.