2. In the process of drilling, the salinity of mud drilling fluid is lower than that of pure water identify oil layer and water layer according to the deep and shallow lateral resistivity curve, and explain the reason. 1080- 1200 Micro Electrode Three Lateral Logging Deep shallow 2 a.m 0 Seven Lateral Logging Deep shallow 0 Induction curve 500 ms/m. 1007 SP +25mV+ { 2

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