靖安油田盘古梁长6储层综合评价

发布时间：2018-03-14 09:47

本文选题：靖安油田　切入点：长6储层　出处：《西北大学》2015年硕士论文　论文类型：学位论文

【摘要】：靖安油田盘古梁地区位于鄂尔多斯盆地中部宽缓的陕北斜坡带上,研究区勘探开发前景良好,但是近几年随着勘探开发研究的不断深入,油藏进入中含水期,出现含水速度上升,水驱特征不明显,油藏中部产量下将迅速等问题,针对目前开发存在的矛盾,急需开展盘古梁地区长6油藏描述以及合理开采技术政策研究的工作,而精细的地质研究和储层综合评价就是合理开发技术政策研究的前提。此次研究当中,以前人对本地区以及周边地区的研究成果为基础,将研究区测井资料、录井资料、岩心观察以及各种测试方法有机的结合起来,对盘古梁地区长6储层展开研究,最后进行储层分类和综合评价并得出了以下认识：1)研究区地层构造平缓,在西倾单斜的背景下发育由东向西倾没的小型鼻状隆起构造：2)盘古梁地区长6油层组为三角洲前缘亚相沉积体系,主要发育河口坝、水下分流河道等微相；3)岩石类型以长石砂岩和岩屑长石砂岩为主,绿泥石和碳酸盐构成填隙物的主体；4)孔隙类型以粒间孔和长石溶孔为主,长621+2粒间孔含量最高；研究区长6储层主要以中孔隙和小孔隙为主,分别占35.9%和28.9%；5)研究区长6储层平均喉道半径2.75μm,主要为中喉道,含量为53%。其次是细喉道,含量为30%；6)研究区长6油层组的孔隙度一般为11-14%之间,平均12.35%,下限9%,渗透率主要集中在0.1～1×10-3μm2之间,下限0.1×10-3μ m2,属于低孔-超低渗储层；7)长621+2和长612小层的物性最好,向两侧逐渐变差,物性较好的区域分布在东部以及中部地区；8)研究区长6成岩作用类型较为丰富,通常以机械压实作用、胶结作用、压溶作用以及溶蚀作用为主。在上述地质分析的基础上,采用K-Means聚类分析法,将研究区长6储层分为三类,G类储层储集性能最好,其次是F类,两者主要分布在水下分流河道中央以及河口坝,P类储层储集性能最差,主要分布在分流河道边沿；主力层长621+2以G类和F类储层为主,长611、长612、长623以F类和P类储层为主。
[Abstract]:Panguliang area is located in the Ordos basin in the middle of Shanbei slope relief belt, the study area of exploration and development prospect is good, but in recent years, with the development of exploration and deepening of the study, reservoir enters the water cut period, water speed rise, water flooding characteristic is not obvious, the central reservoir yield will rapidly, at present the development of the contradictions, an urgent need for Panguliang area of Chang 6 reservoir description and Research on reasonable mining technology policy, and the premise of fine geological research and comprehensive reservoir evaluation is the rational development policy research technology. The research, previous research results of the local area and the surrounding area as the foundation, the research area of well logging data, logging data, core observation and testing method of organic combination of Panguliang Chang 6 reservoir research, the reservoir classification and Comprehensive evaluation and obtained the following understanding: 1) stratigraphic structure in the study area is flat, small nose shaped uplift from east to West plunging development in West monocline background: 2) in Panguliang area Chang 6 reservoir is delta front subfacies depositional system, mainly developed underwater distributary channel mouth bar, etc. microfacies; 3) feldspathic sandstone and lithic feldspar sandstone, chlorite and carbonate constitute the main fillings; 4) pore types are intergranular pore and feldspar dissolved pore, intergranular pore length 621+2 was the highest; of Chang 6 reservoir mainly in the pores and small pores, accounted for 35.9% and 28.9%; 5) of Chang 6 reservoir average throat radius of 2.75 m, mainly in the throat, content is 53%. followed by fine throat, content is 30%; 6) of Chang 6 oil-bearing formation porosity is usually between 11-14%, with an average of 12.35%, the lower limit of 9%, the permeability is mainly concentrated Between 0.1 ~ 1 * 10-3 m2, the lower limit of 0.1 * 10-3 m2, belong to low porosity and low permeability reservoir; 7) of long 621+2 and 612 small layers on both sides of the best, to become worse with better properties of regional distribution in the eastern and central regions; 8) the study area 6 diagenesis types are abundant, usually by mechanical compaction, cementation, pressolution and dissolution. Based on the geological analysis, using K-Means clustering analysis method, the study of Chang 6 reservoirs are divided into three types, G class reservoir performance best, followed by F, both mainly in the underwater distributary channel and mouth bar of the central, P class reservoir performance is the worst, mainly distributed in the edge of the main distributary channel; long 621+2 main layer with G and F reservoir of Chang 611, Chang 612, Chang 623 in class F and P reservoir.

【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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