Intelligent chemical agent adding amount control system for FPSO

Abstract

The invention provides an intelligent chemical agent addition amount control system for a floating production storage and offloading (FPSO), and relates to the field of chemical agent automatic control in the production water treatment process of a floating production storage and offloading device (FPSO), which comprises a trend extraction training module based on real-time data of an oil content analyzer and an intelligent control module based on trend data, under the condition that existing measurement information is not accurate, a set of intelligent algorithm is designed to achieve online intelligent autonomous control over the chemical agent adding amount, a production water oil content trend extraction algorithm model is used for trend extraction and feedback control over the chemical agent adding amount, and the effect that the quality index of discharged water is stable and qualified is achieved; the waste of chemicals is reduced, and the operation cost is reduced; the addition amount of the water clarifier is reasonably decided, and the performance of the FPSO platform agent adding system is improved.

Description

technical field [0001] The invention relates to the field of automatic control of chemical agents in the production water treatment process of a floating production storage and offloading unit (FPSO), in particular to an intelligent chemical agent addition control method based on the measurement data of an oil content analyzer. Background technique [0002] FPSO is the English abbreviation of FloatingProductionStorageandOffloading, which is called "floating production storage and offloading device" in Chinese; meters of oil and gas processing capacity; it is an oil storage vessel, and the oil storage capacity of the FPSOs currently in service in the world has reached 35×10 4 t; it has strong adaptability and can work in the water depth range of 20 to 1000m; it can save the export submarine pipeline and use shuttle tankers to transport commercial oil to other places; it has a high design return period (100 years) and strong wind and wave resistance , can be moored for a long...

AI Technical Summary

Problems solved by technology

Nowadays, most of the water treatment process of FPSO platforms adopts gravity sedimentation separation of oily sewage tank, centrifugal force separation of hydrocyclone, filtration separation, air-entrainment flotation separation and other methods to process crude oil; due to frequent and complicated changes in working conditions, production The water treatment process fluctuates greatly, resulting in large fluctuations in the quality indicators of the external drainage. Currently, the external drainage oil analyzer commonly used on the platform has low measurement accuracy and is inaccurate under complex working conditions such as high temperature, high pressure, and sand carrying. The measurement data is difficult to support the real-time feedback control of the amount of chemical agent added; limited by the inaccurate and unreliable process measurement, the process has generally not yet achieved the goal of automatic control, let alone the goal of optimal control

Therefore, it is very necessary to develop an intelligent control algorithm to realize real-time feedback control of the amount of chemical agent added in the case of inaccurate existing measurement information, so as to achieve the goal of stable and qualified external drainage quality indicators

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