辽东湾坳陷X油田黏土矿物对注水开发储层物性的影响

发布时间：2018-05-27 23:08

本文选题：辽东湾坳陷X油田 + 东二下段　；参考：《大庆石油地质与开发》2017年05期

【摘要】：为摸清研究区储层物性变化规律,指导油田注水开发,以辽东湾坳陷X油田东二下段三角洲前缘储层中黏土矿物为研究对象,采用铸体薄片、扫描电镜、X—衍射等方法,通过对比不同位置、不同含水阶段密闭取心井黏土矿物体积分数、储层物性,结合古地貌与沉积环境,深入分析黏土矿物的分布规律及控制因素,探讨黏土矿物对注水开发储层的影响。研究结果表明:研究区储层中黏土矿物主要为伊/蒙混层和高岭石,含有少量的伊利石和绿泥石;受古地貌与沉积环境两大因素控制,黏土矿物含量呈现规律性变化,南西地区古地貌低洼,储层埋深较大,以石英砂岩为主的河口坝砂体发育,伊/蒙混层含量高,而北东地区古地貌略凸起,储层埋深小,以长石砂岩为主的水下分流河道砂体发育,高岭石含量高;黏土矿物总含量低的储层水淹较强,黏土矿物总含量高的储层水淹较弱;伊/蒙混层含量高的储层,水淹后储层物性明显降低,而高岭石含量高的储层,水淹后储层物性明显变好。研究成果为储层剩余油描述提供了新思路,也为同类油田的注水措施优化、开发方案调整提供了理论指导。
[Abstract]:In order to find out the change rule of reservoir physical property in the study area and to guide oilfield water injection development, the clay minerals in the delta front reservoir of the lower east second member of Liaodong Bay Depression X Oilfield were studied by casting thin slice, scanning electron microscope (SEM) and X-ray diffraction (SEM), etc. By comparing the number of clay objects in closed coring wells, reservoir physical properties, paleogeomorphology and sedimentary environment, the distribution law and controlling factors of clay minerals are deeply analyzed. The influence of clay minerals on reservoir development by water injection is discussed. The results show that the clay minerals in the reservoir are mainly composed of Iraq / Mongolia mixed layer and kaolinite, and contain a small amount of Illite and chlorite, which are controlled by two factors, paleogeomorphology and sedimentary environment, and the clay mineral content changes regularly. The paleogeomorphology is low, the reservoir depth is deep, the sand body of estuarine dam, which is mainly quartz sandstone, is developed, and the content of Iraq / Mongolia mixed layer is high, while the paleogeomorphology is slightly raised and the reservoir buried depth is small in the north east area. The sand body of underwater distributary channel mainly composed of feldspar sandstone is developed, the content of kaolinite is high, the reservoir with low clay mineral content is stronger water flooded, the reservoir with high clay mineral content is weaker, the reservoir with high content of Iraq / Mongolia mixed layer, The physical properties of the reservoirs with high kaolinite content are obviously decreased after water flooding, while the physical properties of the reservoirs with high kaolinite content are improved obviously. The research results provide a new idea for the description of reservoir remaining oil, and also provide theoretical guidance for the optimization of water injection measures and the adjustment of development scheme for similar oilfields.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“海上油田丛式井网整体加密及综合调整技术”(2011ZX05024)
【分类号】：TE357.6

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