剩余油饱和度测井方法适应性分析与应用实践--以胜利油区为例  

Analysis of adaptability of saturation logging methods and their application in actual production:A case of Shengli Oilfield

作　　者：柴德民 安振芳 刘显太[2] 谭海洲 孙荣德 罗水发 薛辉 CHAI Demin;AN Zhenfang;LIU Xiantai;TAN Haizhou;SUN Rongde;LUO Shuifa;XUE Hui(Reservoir Dynamic Monitoring Center,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257100,China;Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257001,China)

机构地区：[1]中国石化胜利油田分公司油藏动态监测中心,山东东营257100 [2]中国石化胜利油田分公司,山东东营257001

出　　处：《油气地质与采收率》2022年第3期20-28,共9页Petroleum Geology and Recovery Efficiency

摘　　要：剩余油分布状况是油田开发后期需要普遍关注的焦点问题,地下情况的复杂性给剩余油的探测增加了难度,套管井饱和度测井是探测剩余油最为直接有效的方法,可为油田开发方案调整提供有力支撑。然而,单一饱和度测井方法很难适用于各类地质情况。为此,对目前胜利油区常用的几种主要饱和度测井方法进行比较,并分析其所适用的储层特征,在现场应用中针对区域地质特点,优选合适的饱和度测井方法,可以更加准确地判断管外窜槽,指示出水层位,识别气层、低电阻率油层、清污交替混合注入油藏复杂水淹层,辨析近井地带孔隙内的流体性质,确定剩余油的分布状况,挖掘潜力油层,减小了岩性、孔隙度、井筒环境、地层水矿化度等因素的影响,降低了多解性,解释结果符合率得以有效提升,根据测井解释结果,为酸化、压裂、补孔提供潜力层位,措施后,含水率下降,产油量增加。The distribution of remaining oil is a common concern in the later period of oilfield development,and the com⁃plexity of underground conditions makes the detection of remaining oil more difficult.The cased hole saturation logging is the most direct and effective method to detect remaining oil,which can provide strong support for the adjustment of oilfield development plans.However,one saturation logging method can hardly be applied to all geological conditions.Hence,we compared the current saturation logging methods applied in Shengli Oilfield and analyzed the characteristics of reservoirs that these methods can be applied to.According to the geological characteristics of the region,an appropriate saturation log⁃ging method was selected to evaluate the remaining oil saturation(ROS).It can more accurately determine the channeling outside the casing,indicate the location of water leakage,and recognize the gas reservoir,the oil reservoir with low resistivi⁃ty,and the oil reservoir that is injected with fresh water and produced water alternately.Additionally,this method can dis⁃tinguish and analyze the fluid properties in pores near the well,determine the distribution of remaining oil,and excavate the potential oil reservoirs.As a result,the multiplicity of solutions and the influence of factors such as lithology,porosity,well⁃bore environment,and the salinity of formation water are reduced;the coincidence rate of interpretation results has been ef⁃fectively improved.Given the result of logging interpretations,the potential reservoirs are provided for acidizing,fracturing,and perforation adding.Upon the implementation of the measures,the water cut decreases,and the oil production increases.

关 键 词：剩余油饱和度 过套管电阻率 中子寿命 碳氧比 脉冲中子全谱 

分 类 号：P631.84[天文地球—地质矿产勘探]