长6特低渗油藏剩余油分布主控因素定量化研究  

Quantitative study on main controlling factors of remaining oil distribution in Chang 6 ultra-low permeability reservoir

作　　者：高卓林 刘成 何甜 张道亮 王祎婷 张伟[1] 霍焱彬 邓盼盼 GAO Zhuolin;LIU Cheng;HE Tian;ZHANG Daoliang;WANG Yiting;ZHANG Wei;HUO Yanbin;DENG Panpan(Yanchang Oilfield Co.,Ltd.,Exploration and Development Technology Research Center,Yan'an Shaanxi 716000,China;School of Economics and Management,Xi'an Shiyou University,Xi'an Shaanxi 710000,China;Yanchang Oilfield Co.,Ltd.,Baota Oil Production Plant,Yan'an Shaanxi 716000,China)

机构地区：[1]延长油田股份有限公司勘探开发技术研究中心,陕西延安716000 [2]西安石油大学经济管理学院,陕西西安710000 [3]延长油田股份有限公司宝塔采油厂,陕西延安716000

出　　处：《石油化工应用》2024年第9期74-79,88,共7页Petrochemical Industry Application

基　　金：延长油田股份有限公司基金项目(ycsy2021qnjj-B-01,ycsy2022qt-B-1-2-4-8)。

摘　　要：依据钻井、测井、生产开发数据,将区内的小层、砂体、油层进行精细划分与对比,对油层进行精细识别,采用定性分析和定量计算、静动态分析相结合的方法,对全区低幅度构造发育程度、沉积相的发育稳定程度、储层性质的变化程度与油层单井平均原始含油饱和度、单井平均原始地质储量、单井平均剩余油饱和度、单井平均采出程度、单井平均产量、变异系数等相关地质开发参数进行定量分析统计。研究表明,低幅度构造组合单元的变化对采出程度的影响差值达到1.12%,差值率达到17.1%,单井平均累产差值达到17.3 t,差值率达到0.7%;沉积相变化的快慢对采出程度的影响差值达到0.80%,差值率达到13.7%,单井平均累产差值达到544.3 t,差值率达到23.3%;储层性质变化的快慢对采出程度的影响差值达到1.83%,差值率达到29.5%,单井平均累产差值达到670.4 t,差值率达到26.3%;开发过程中平均原始含油饱和度经过多年开发的变化率,构造的影响差值变化率为0.48%,沉积的影响差值变化率为1.00%,储层性质的影响差值变化率为1.46%。综上分析,储层性质的变化对剩余油的分布具有明显的控制作用,其次为沉积发育变化,最后为构造的变化。According to the drilling,logging,production and development data,the small layers,sand bodies,and oil layers in the area are finely divided and compared,and the oil layers are finely identified.By combining qualitative analysis,quantitative calculation,and static and dynamic analysis,the low amplitude structural development degree,the development and stability of sedimentary facies,the change degree of reservoir properties,and the average single well original oil saturation of the oil layers are analyzed quantitative analysis and statistics are made on the average single well original geological reserves,average single well remaining oil saturation,average single well recovery,average single well production,variation coefficient and other relevant geological development parameters.The research shows that the difference of the influence of the change of low-amplitude structural combination unit on the recovery degree is 1.12%,the difference rate is 17.1%,the average cumulative production difference of single well is 17.3 t,and the difference rate is 0.7%.The influence of the speed of sedimentation change on the recovery degree has a difference of 0.80%,with a difference rate of 13.7%,and the average cumulative production difference of a single well has reached 544.3 t,with a difference rate of 23.3%.The difference of the influence of the change of reservoir property on the recovery degree is 1.83%,the difference rate is 29.5%,and the average cumulative production difference of single well is 670.4 t,the difference rate is 26.3%.The change rate of oil saturation after years of development in the process of development,the change rate of influence difference of structure is 0.48%,the change rate of influence difference of sedimentation is 1.00%,and the change rate of influence difference of reservoir property is 1.46%.To sum up,changes in reservoir properties have obvious control over the distribution of remaining oil,followed by changes in sedimentary development and finally structural changes.

关 键 词：长6油藏 剩余油定量研究 主控因素 子长油区 

分 类 号：TE122.35[石油与天然气工程—油气勘探]