塔中4油田接地电阻测量分析

塔中４油田地表土壤电阻率由地表向下随着沙土含水量和密实度的增加，呈明显减小趋势。在土壤电阻率不均匀的厚层流动沙丘中测量深井埋设金属接地体接地电阻值，采用将测试极打入足够的深度或在其周围洒水并利用辅助接地极的方法会造成较大投资。通过大量现场实测数据的分析，发现采用电流表校验法和在密实度较好的地带（井场或公路两侧）埋设测试极来进行测量，可用较短的测试极完成测量。解决了测试极的合理埋深、埋设位置及测量结果是否为接地电阻真值等一系列技术问题，达到了经济合理的测量目的。该方法现已在沙漠油田推广应用。

Tazhing No 4 Oilfield Grounding Resistance Gauging Analysis

Through a great deal site practical gauging date analysis, the authors found that gauging task can be completed by using shorter pole and by using amperemeter calibrating method and on the district which has better compactness(Well site or both sides of the highway) buried test pole, carrying on measurement. Thus a series of problems(reasonably buried depth and buried place, and whether the gauging result is the true value of grounding resistance etc) are solved. The method is rational in economy and has been spread to desert oilfields.