A differential wide field electromagnetic method and its application in alkaline-surfactant-polymer (ASP) flooding monitoring

LI Diquan,HE Jishan

Fig. 2. Schematic diagram of (a) the equipment and (b) operation plan of the wide-field electromagnetic method. A and B are two grounding poles of the transmitting cable. The distance between them is generally 1-3 km, but the distance is 0.89 km in this study due to the site condition.