套后饱和度测井在南苏丹TS区块的应用  

Application of Cased Hole Saturation Logging in TS Block of South Sudan

作　　者：孔庆东 曾玉强 马宝全 杨飞 杨宝平 卢宣言 KONG Qingdong;ZENG Yuqiang;MA Baoquan;YANG Fei;YANG Baoping;LU Xuanyan(International Branch,China National Logging Corporation,Beijing 100101,China;Exploration and Development Research Institute of Daqing Oilfield Company,Daqing,Heilongjiang 166453,China)

机构地区：[1]中国石油集团测井有限公司国际公司,北京100101 [2]大庆油田勘探开发研究院,黑龙江大庆166453

出　　处：《测井技术》2022年第4期459-465,共7页Well Logging Technology

基　　金：中国石油集团测井有限公司科技项目“海外稳油挖水技术体系研究”(CNLC2022-10D02);“CPLog测井系统在海外市场的集成配套研究”(CPL2021-D04)。

摘　　要：南苏丹TS区块为砂泥岩地层,处于开发中后期,为了判断水淹级别,监测剩余油位置,相继引入了PNN、RLAC以及PSSL的C/O模式和中子寿命模式等套后饱和度测井方法,以期能够为油田制定开发方案提供合理的科学依据。从测量原理、仪器技术指标和影响因素等方面对比和梳理这些测井方法的可行性,统计和对比测井效果,验证每种方法的可靠性和局限性。从作业结果看,由于地层水等效NaCl浓度太低,在TS区块PNN和PSSL的中子寿命模式对流体识别效果不佳。在满足仪器测量要求的情况下,RLAC和PSSL的C/O模式能够有效识别流体性质以及确定剩余油潜力,增油控水效果显著,在南苏丹TS区块有较好的适用性。The TS block of South Sudan belongs to sand-shale formation,which is in the middle and late stages of development.In order to determine water flooding level and locate remaining oil,technologies such as PNN,RLAC,PSSL C/O mode and PSSL neutron lifetime mode have been introduced in succession,which is expected to provide scientific basis for the reasonable development programs for oilfields.The feasibility of these logging methods is compared and sorted out from the aspects of measurement principle,instrument technical indicators and influencing factors,and the logging effects are counted and compared to verify the reliability and limitations of each method.Based on the treatment results,PNN and the PSSL neutron lifetime mode are not effective for fluid identification in the TS block due to the low equivalent NaCl concentration in formation water.However,both RLAC and the PSSL C/O mode can effectively identify fluid properties and determine remaining oil potential in the sand-shale formation under the requirements of instrument measurement.RLAC and the PSSL C/O mode have achieved significant effects in increasing oil and reducing water,and prove their adaptability in the TS block of South Sudan.

关 键 词：生产测井 中子寿命模式 砂泥岩地层 剩余油 饱和度测井 增油控水 流体性质识别 

分 类 号：P631.84[天文地球—地质矿产勘探]