A method and system for simulating a dynamic kill of a relief well

By using the dynamic method to kill wells, a characterization model of rescue wells and blowout wells was established, and the density and displacement distribution of the kill fluid were optimized. This solved the well control problem after drilling fluid blowout and improved the success rate and safety of well control.

CN116341046BActive Publication Date: 2026-06-19PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2021-12-24
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

During the drilling process, if the drilling fluid in the well is blown out, conventional well control methods will fail, resulting in no drilling tools in the well and the wellhead cannot be shut in, making it impossible to effectively control the well and increasing the risk and difficulty of well control.

⚗Method used

The dynamic method is used for well control. By establishing a characterization model of the rescue well and the blowout well, a transient dynamic well control model is constructed using a commercial simulator. The density, displacement and distribution ratio of the well control fluid are optimized, and simulation and selection are carried out in combination with field conditions.

🎯Benefits of technology

It improved the success rate of well control in rescue wells, optimized key parameters, reduced the risk of equipment damage, and enhanced the efficiency and safety of well control processes.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a simulation method and system for well control in rescue wells. The method includes: establishing a surface strike-slip fracture zone solid structure model for the area to be drilled; establishing a subsurface strike-slip fracture zone development model based on the surface strike-slip fracture zone solid structure model; calibrating the fractured cavities within the strike-slip fracture zone using data obtained from drilled wells, evaluating the oil and gas reservoir production using the production of drilled single wells, and establishing an oil and gas reservoir distribution model; superimposing the subsurface strike-slip fracture zone development model with the oil and gas reservoir model, predicting potential high-yield well development areas in the oil and gas reservoir distribution model based on the strike-slip fracture zone pattern; and determining the drilling well location based on the predicted high-yield well development area. This invention can improve the storage of equipment and materials such as pumps and well control fluids on-site, promoting efficiency and effectiveness.
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