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曲堤油田Q104块沙四段属于河流相沉积体系,通过对研究区岩芯观察、铸体薄片、X-射线衍射、扫描电镜、图像、粒度、岩芯常规测试以及测井二次解释成果等资料的分析,对储层岩石学特征、物性特征、孔隙类型及孔隙结构特征进行了详细的研究。储层岩石类型主要为灰、灰褐色粉、细长石岩屑或岩屑长石砂岩,成分成熟度和结构成熟度都较低,以泥质胶结为主,粘土矿物主要为伊/蒙间层、高岭石、伊利石、绿泥石,是本区最主要的潜在敏感性。储层物性多属中孔低渗、高孔中渗,储层孔隙度和渗透率具有很好的正相关性。储层面孔率在8-13%左右,储集空间以原生粒间孔为主,孔隙结构较好,属中小孔、中细喉型孔隙结构,储层的最大连通孔喉半径、孔喉半径均值以及中值半径与渗透率都有着较好的正相关性,渗透率与退汞效率具有很好的负相关性。
The Qisi block of Q104 in Quti oilfield belongs to fluvial facies depositional system. Through the observation of the core in the study area, casting thin slices, X-ray diffraction, scanning electron microscopy, image, grain size, routine testing of cores and second interpretation of logging results Data analysis of the reservoir petrology, physical properties, pore types and pore structure characteristics were studied in detail. The rock types of the reservoirs are mainly gray, tawny powder, slender rock cuttings or lithic feldspar feldspar sandstones, with low maturity and structural maturity. The mudstone is mainly composed of clay and the main clay minerals are yi / Layers, kaolinite, illite, chlorite are the most important potential sensitivities in the area. Most reservoir properties belong to low porosity and high porosity, high porosity and permeability, reservoir porosity and permeability have good positive correlation. The reservoir porosity is about 8-13%. The reservoir space is dominated by primary intergranular pores and the pore structure is good. It is a medium-small pore, medium-thin-throat type pore structure, the maximum throat radius of the reservoirs, pore throat Radius mean and median radius have a good positive correlation with permeability, and permeability has a good negative correlation with mercury removal efficiency.