辽东湾坳陷X油田黏土矿物对注水开发储层物性的影响  

INFLUENCES OF THE CLAY MINERALS ON THE WATERFLOODED RESERVOIR PHYSICAL PROPERTIES OF OILFIELD X IN LIAODONG BAY DEPRESSION

作　　者：张雪芳 刘宗宾 刘超 刘欢 张瑞 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《大庆石油地质与开发》2017年第5期62-67,共6页Petroleum Geology & Oilfield Development in Daqing

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)

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。In order to find out the change laws of the reservoir physical properties in the study area and provide the guide for the development of the oilfield water injection,taking the clay minerals of the delta front reservoir in Member E3d2 Lof Oilfield X in Liaodong Bay Depression as the researching object,with the help of the cast thin sheet,scanning electron microscope（ SEM）,X-ray diffraction and so on,by means of the contrasts of the volume fractions of the clay minerals,reservoir physical properties of different positions and watercut stages of the sealed coring wells,integrated with the palaeogeomorphology and sedimentary environments,the distribution laws and controlling factors of the clay minerals were analyzed in-depth,the influences of the clay minerals on the waterflooded reser-voirs were explored. The researches show that the main clay minerals in the reservoir area are illite/smectite mixed layer and kaolinite with a small amount of the illite and chlorite; under the controls of two principal factors： palaeogeomorphology and sedimentary environments,the contents of the clay mineral change regularly,the palaeogeomorphology in the southern and western regions is rather lower,the buried depth of the reservoir is rather bigger,the mouth bar sandbodies in the subsurface distributary channels are well developed and mainly composed of the quartz sandstones,the content of the illite/smectite mixed layer is pretty higher,while the palaeogeomorphology in the northern and eastern regions uplifts a litter bit,the buried depth is pretty shallow,the sandbodies in the subsurface distributary channels are well developed and mainly composed of the feldspar sandbodies with the high content of the kaolinite; the reservoirs with the low content of the clay minerals are seriously waterflooded,the reservoirs with the high content of the clay mineral are just on the contrary; the physical properties of the reservoirs with the high content of the illite/smectite mixed layer are significantly reduced after waterflooded,whil

关 键 词：辽东湾坳陷X油田 东二下段 三角洲前缘 黏土矿物 储层物性 

分 类 号：TE122.23[石油与天然气工程—油气勘探]