模拟地层条件的复电阻率自动测量系统研制

Auto-controlled Complex Resistivity Measurement System Under Modeling Reservoir Condition

复电阻率测井技术是非常有应用前景的新技术,但是缺乏定量研究基础,其主要原因是没有高精度实验系统。研制了模拟地层条件下的复电阻率自动测量系统。模拟地层条件下的高温高压复电阻率测量系统由岩心夹持器、驱替系统、温度控制系统、饱和度计量系统、复电阻率测量装置和控制系统等组成。系统能够连续测量驱替条件下的岩心的复电阻率;解决了测量系统的压力精度和稳定性;研制了岩心含水饱和度测量装置,且全部测量和控制由计算机完成。对实际岩心测试结果表明,该实验系统具有较高的复电阻率测量精度和含水饱和度计量精度,满足了实验需要,对于研究含水泥质砂岩的复电阻率具有非常重要的作用,同时该系统还能够用于驱替条件下的电阻率测试。

The complex resistivity logging is a new technology in formation evaluation, But there are few quantitative experiments about the complex resistivity of the rocks. This mainly results from the lack of high-precision measuring system. A complex resistivity measurement system under modeling reservoir condition has been developed that consists of core holder, oil-water displacement, temperature control unit, saturation measuring unit, complex resistivity measuring unit and controlling unit, etc. The complex resistivity of the cores can be measured continuously in the displacement process with high pressure precision and stability. A core water saturation measurement unit was made that is auto-controlled by a computer. The actual core tests show that the system has high precision and can improve the measurements of complex resistivity of partial-water-saturated shaly sands. It can also be used for the measurements of the resistivity of the rocks in the simulated water flood process.