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柳赞油田断裂构造发育,油水关系复杂,水淹层水淹程度差异大,剩余油分布复杂,认识难度大,新井投产和老井作业效果不理想。为了正确认识储层,寻找剩余油饱和度相对富集层位,2008年8月以来应用高精度碳氧比能谱测井仪,对该油田15口井进行了测井分析。应用结果表明,利用高精度碳氧比能谱测井资料,能够重新对某些储层进行正确评价,确定剩余油分布并判断水淹层级别,经解释,柳赞-1井27号层为剩余油富集区,柳赞-2井22号层为上油水同层下水层,柳赞-3井14号层为上中水淹层下较强水淹层,9口井采取了新的生产措施,累积增油量为2 560t,综合含水率下降了30.6%。据此,重新作业井的解释符合率达100%。
The fault structure of Liuzan Oilfield is developed, the relationship between oil and water is complex, the degree of flooding of water flooded layer varies greatly, and the distribution of remaining oil is complex, so it is difficult to recognize. The operation effect of new wells and old wells is not satisfactory. In order to understand the reservoir correctly and find the relatively rich reservoir of remaining oil saturation, the logging analysis of 15 wells in this oilfield has been carried out since August 2008 with high-precision C / O spectral logging tools. The application results show that the use of high-precision C / O logging data can re-evaluate some reservoirs correctly to determine the remaining oil distribution and determine the level of water flooded layer. After interpretation, In the remaining oil-rich area, layer No.22 of the Liuzan-2 well is a subterranean formation of the upper layer of oil-bearing water while layer 14 of the No.3-well of Yanzan-3 is a strong water-flooded layer under the upper-middle-water flooded layer. Nine wells Production measures, the cumulative oil yield of 2 560t, the integrated moisture content decreased by 30.6%. Accordingly, the re-operation of the interpretation of the well-matched rate of 100%.