Three-dimensional numerical modeling of surface-to-borehole electromagnetic method for monitoring reservoir

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Abstract Dynamic exploration for oil and gas requires careful monitoring of reservoir contents for safety and efficiency of oil extraction. This paper proposes a multi-source and multi-azimuth walk-around vertical electromagnetic profiling (MM-VEP) technique for surface-to-borehole electromagnetic surveying. Based on the difference in conductivities between reservoirs with different concentrations of oil and water, MM-VEP can be used to monitor reservoirs as they are injected with water. The MM-VEP response in five azimuth planes is modeled with three-dimensional (3D) integral equation calculations. The progress of waterflooding in four stages for enhanced oil recovery is shown to be indicated by field anomalies MM-VEP caused by variations in the reservoir resistivity. Numerical modeling demonstrates that MM-VEP measurements provides enough quantitative information from an underground reservoir to accurately detect oil deposits and monitor the progress of waterflooding.

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Key words： Reservoir detecting multi-azimuth MM-VEP integral equation method

Received: 2017-03-13;

Fund:

This work is supported by the National Science and Technology Major Project (No. 2011ZX05019-007), National Natural Science Foundation of China (No. 41604097), China Postdoctoral Science Foundation (No. 2016M592611), and Project (Nos. 002401003503 and 002401003514) from Guilin University of Technology.

Cite this article:

. Three-dimensional numerical modeling of surface-to-borehole electromagnetic method for monitoring reservoir[J]. APPLIED GEOPHYSICS, 2017, 14(4): 559-569.

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