三相流产出剖面测井在大庆油田适用性研究

尽管大庆油田产出液体的综合含水率已经超过90%,随机统计60口油井中井下流量与井口液量测量结果的差异,显示油水两相流产出剖面测井仪器不适应的井约占20%.41口井三相流测井资料327个测量层段解释结果显示,含气率与液相含油率之间没有明显的关系,因此是否应用三相流仪器测井的判据应该是产气量而不是液相含油率.实例表明,在三相流井中用两相流仪器测得资料判断出的主产液层和主产水层并不可靠.三相流产出剖面测井在特高含水期的大庆油田仍有适用性.

On Applicability of Three-phase-flow Production Profile Logging in Daqing Oilfield

By investigating the difference between flowrate measured dowhole and liquid flowrate measured at the wellhead, it is observed that about 20 percent of 60 random-selected oil wells in Daqing Oilfield are not suitable for those production logging tools designed for oil/water two-phase-flow, though the integration water-cut of liquid phase in this field has been higher than 90%. Data from 327 layers in 41 producers logged with three-phase-flow tools show that there is no closer connection between gas-cut and oil-cut of the liquid phases. Therefore, it is gas production, but not oil-cut of the liquid phases, that can be the criterion of applying three-phase-flow tool. Field examples show that log data collected with two-phase-flow tool may misinterpret the primary liquid or water-producing zones in a well with three-phase-flow. Three-phase-flow production logging still plays an important role in production logging in this field.