HAO Xining, LI Zhong, DANG Bo, et al. Post-casing reservoir monitoring system and influence law based on line sources [J]. Petroleum Drilling Techniques, 2025, 53(2):175−180. DOI: 10.11911/syztjs.2025018
Citation: HAO Xining, LI Zhong, DANG Bo, et al. Post-casing reservoir monitoring system and influence law based on line sources [J]. Petroleum Drilling Techniques, 2025, 53(2):175−180. DOI: 10.11911/syztjs.2025018

Post-Casing Reservoir Monitoring System and Influence Law Based on Line Sources

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  • Received Date: May 09, 2024
  • Revised Date: February 03, 2025
  • Accepted Date: February 03, 2025
  • Available Online: February 09, 2025
  • In order to achieve real-time monitoring of reservoir parameters such as oil-water interface and online precise control of wellbore production, a post-casing reservoir monitoring system based on line sources was established according to the transient electromagnetic theory. Through numerical simulation, the basic characteristics of the post-casing reservoir monitoring system and the influence law of different factors on the post-casing detection performance of the reservoirs based on line sources were analyzed. The simulation results show that using the casing as a line source can apply a greater current, and the strength of the secondary field signal is positively correlated with the line source current. The suitable emission length of the line source is around 300 m. A larger wall thickness of the casing indicates a higher amplitude of the electric field response. The results show that the post-casing reservoir monitoring system based on line sources has good oil-water interface recognition ability within a range of 15 m, which can provide effective technical means for online monitoring and stable oil and water control of oil and gas wells.

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