Abnormal stress diagnosis method for FPSO single-point mooring system

Abstract

The invention provides an abnormal stress diagnosis method for an FPSO single-point mooring system; the method comprises the following steps: monitoring sea condition environment data, FPSO motion and anchor chain tension data through a sensor arranged on an FPSO, and obtaining a basic database of monitoring data needed by evaluation; performing data cleaning on the acquired monitoring data, the data cleaning comprising data exception screening and time continuity checking; analyzing the cleaned monitoring data, setting monitoring time periods, and calculating the sea condition environment data, the FPSO movement data and the anchor chain tension data average value of each monitoring time period; setting monitoring periods, and counting FPSO movement and anchor chain tension data under different wind wave and flow combined sea conditions in each continuous monitoring period in each monitoring period; calculating an overall evaluation standard value; and evaluating whether the whole mooring system has an abnormal stress condition or not under the current sea condition through monitoring data.

Description

technical field [0001] The invention relates to an algorithm for diagnosing abnormal force of an FPSO single point mooring system. Background technique [0002] The floating production and storage unit (FPSO) has the functions of oil, gas and water treatment, crude oil storage, external transportation and life support. It is fixed on the sea for long-term operations through a single point mooring system. It is the main equipment for the production of offshore oil and gas resources. Once a problem occurs will have extremely serious consequences. In recent years, ultra-limit sea conditions have occurred frequently, and single-point system failures have also increased. According to statistics, 90% of the failures come from the mooring system. The abnormal force causes the single-point mooring system to fail to perform its normal functions, resulting in the failure of the FPSO to be normally fixed at sea. Operation, oil riser breakage and other accidents. In the face of disast...

AI Technical Summary

Problems solved by technology

However, underwater ROV detection is often not targeted, and the accuracy of the detection results is low, and it is impossible to quantify the abnormalities of the mooring system, and the failure of the mooring system is often combined with unforeseen, long-term accumulation of systematic defects. Rely on the statistical analysis results of long-term monitoring data to give quantitative analysis guidance

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