Re-prediction method of subsea Christmas tree combining Kalman filter and Bayesian network

Abstract

The invention belongs to the field of petroleum engineering, and in particular relates to an underwater Christmas tree re-prediction method integrating Kalman filtering and Bayesian network. The underwater Christmas tree re-prediction method combining Kalman filter and Bayesian network includes three steps: establishment of digital twin model, establishment of re-prediction model of degradation process and establishment of remaining life calculation model. The subsea Christmas tree re-prediction system integrating Kalman filter and Bayesian network, including the subsea distribution unit information acquisition subsystem installed in the subsea distribution unit, and the subsea control module information acquisition subsystem installed in the subsea control module , the subsea valve group information acquisition subsystem installed in the subsea valve group, the wellhead mechanical module information acquisition subsystem installed in the wellhead mechanical module, the underwater environment information acquisition module installed in the subsea control module, and the underwater control station installed in the water control station The Subsea Christmas Tree Digital Twin Subsystem.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a method for re-predicting underwater Christmas trees by integrating Kalman filtering and Bayesian network. Background technique [0002] With the increase of global oil consumption, the development of offshore oil has been paid more and more attention. Subsea Christmas tree is one of the key equipments to complete subsea crude oil extraction. Subsea tree systems contain hydraulic systems, control systems, and various valves used to test, operate, shut down, and throttle the oil, gas, and other fluids produced. The hydraulic system is mainly responsible for providing hydraulic power to the underwater valve. The control system is mainly responsible for regulating the production of the oil well and controlling the valves installed on the trees and pipelines. The main functions of the Christmas tree include: safe isolation of oil reservoirs, isolation of various u...

AI Technical Summary

Problems solved by technology

The traditional remaining life prediction is to establish a life model based on statistical analysis, or to perform data-driven life analysis based on degradation data. However, for dynamic systems, after the working environment and workload change, the remaining life will also fluctuate. For The subsea oil tree has a more complex underwater environment, and it is extremely difficult to optimize the life prediction results

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