新型动电测井仪复合式电极系分析和测试

对实际探测器复合式电极系进行研究,重点研究动电测井探测器复合式电极系结构、工作原理及电子系统原理及测试等。使用有限元法进行数值模拟,分析电场响应结果并求解出电极系系数数值解。其次,分析复合电极系电路系统原理并在实验室对发射和采集系统电路进行上电测试和高温实验。结果表明:这种探测器成功地将不同结构和材料要求的声、电探测器融合在一起,且能实现声、电信号记录点深度对齐;电路系统在高温下工作正常,可以进行下井实验。研究结果为动电测井探测器的研究、实现以及井下现场测试提供理论支持。

Analysis and testing of a new electrokinetic logging tool composite electrode array

The composite electrode array in electrokinetic logging detectors was studied, with focuses on its structure, working principle, electronic system principle and testing. A numerical modelling study with the electrode array was carried out using finite element method, then the results in the electric field response were analyzed to solve for the numerical solution of the electrode array coefficient. Next, the electronic circuit principle of the composite electrode array was also analyzed, and power-on test and high temperature experiment with the exciting circuit and data acquisition circuit system were also conducted. The results show that this detector successfully merges acoustic logging and electric logging detectors with different structure and material together, and can align the acoustic and electrical signals in the depth of the record point; the electronic circuit system functions well in high temperature and then can be experiment in downhole. The results also suggest the technique has great feasibility for downwhole field tests and analyzing electrokinetic logging tool.