Development and Application of High Temperature and High Pressure Wellbore Corrosion Probe Monitoring System

doi:10.11885/j.issn.1674-5086.2021.05.26.01

Abstract

Abstract: In order to solve the problem of high-temperature and high-pressure wellbore annulus corrosion monitoring, based on the principle of inductive corrosion monitoring technology, a method of serial connection of multiple sets of measurement test strips and simultaneous implementation of excitation signals is designed and developed, which is a tubular corrosion probe monitoring system for simultaneous monitoring of tubing and casing corrosion with multiple channels. The connection between the probe monitoring device and the tubing adopts a snap-fit connection, avoids the impact of device welding on tubing corrosion. Under the experimental conditions of 140 ℃ and 70 MPa, the temperature and pressure resistance and data reliability of the device is tested using on-site produced fluid. The deviation between the monitoring data and the simulation results of high temperature and high pressure corrosion is less than 5%, and the temperature and pressure resistance is good. Finally, the corrosion monitoring system is tested on-site. The results show that the developed wellbore corrosion probe monitoring system works well, and the relative error between the monitoring data and the on-site coupon is 8.32%. It is concluded that the monitoring system can meet the requirements of wellbore corrosion monitoring in harsh environments, and provides a new technical means for effectively grasping the wellbore oil casing annulus corrosion status and high-temperature and high-pressure wellbore corrosion monitoring.

Key words: high temperature and high pressure, oil and gas well, oil sleeve annulus, corrosion monitoring, probe

CLC Number:

TE38

LONG Wu, LIU Zhendong, ZHANG Jiangjiang, LI Fang, ZENG Dezhi. Development and Application of High Temperature and High Pressure Wellbore Corrosion Probe Monitoring System[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(6): 147-156.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2021.05.26.01

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