An operation safety analysis system for offshore drilling top tension riser system

Abstract

The invention discloses an operation safety analysis system for a top tensioned riser system for offshore drilling, and belongs to the technical field of top tensioned riser operation safety analysis. The invention collects various equipment operation parameters of the riser when it is working through an equipment operation supervision unit, comprehensively analyzes the equipment operation parameters to generate operation parameter floating values, and uses the operation parameter floating values ​​as a determination factor for operation risk. When an operation risk signal is generated, the equipment risk operation parameters are adjusted within a preset A range, and the regenerated operation parameter floating values ​​are evaluated and analyzed again, and this is used as a determination for whether to conduct a comprehensive analysis in combination with marine environmental interference factors. When a continuous risk signal is generated, the analysis is conducted in combination with the environmental interference value, and the equipment operation parameters are adjusted within a preset B range or a preset C range, so that the analysis of the equipment operation parameters is effectively verified, thereby being able to quickly find the influencing factors and improve the accuracy of the determination of the influencing factors.

Description

Technical Field

[0001] The present invention relates to the technical field of top tensioned riser operation safety analysis, and more specifically, to an offshore drilling top tensioned riser system operation safety analysis system. Background Art

[0002] Top-tensioned risers are mainly used in tension-leg platforms and single-column riser platforms in deepwater oil and gas production. They are one of the key components connecting the offshore platform and the underwater wellhead and are responsible for transmitting drilling mud, oil, gas and other fluids. The top-tensioned riser system will be subjected to internal and external loads during the production cycle and is one of the most vulnerable components of the watertight pipe underwater equipment system. Once the riser system is damaged, it may lead to shutdowns at the least, or oil and gas leakage at worst, causing fires and explosions.

[0003] At present, during the operation of the top tensioned riser, it is impossible to conduct real-time monitoring and analysis of the equipment operating parameters and accurately feedback the operating effect, and it is difficult to verify the analysis of the equipment operating parameters in combination with the marine environmental parameters. Therefore, when an abnormal fault occurs, it is difficult to quickly find the influencing factors and improve the accuracy of the judgment of the influencing factors. It is difficult to quickly and reasonably adjust according to the effective factors, which increases the risk of top tensioned riser operation.

[0004] To this end, we proposed an offshore drilling top tensioned riser system operation safety analysis system, which conducts risk analysis of the riser system operation, effectively captures its abnormal operation conditions and provides timely feedback and warnings, which is of great significance to ensuring operation safety and improving operation efficiency. Summary of the invention

[0005] The present invention aims to solve the problems of the prior art. Compared with the prior art, a marine drilling top tensioned riser system operation safety analysis system is provided. The system collects various equipment operating parameters of the riser when it is working through an equipment operation supervision unit, comprehensively analyzes the equipment operating parameters to generate operating parameter floating values, and uses the operating parameter floating values ​​as the determination factors of the operation risk. When an operation risk signal is generated, the equipment risk operation parameters are adjusted within a preset range A, and the regenerated operating parameter floating values ​​are evaluated and analyzed again, which is used as a judgment on whether to conduct a comprehensive analysis in combination with marine environmental interference factors. When a continuous risk signal is generated, the environmental interference value is analyzed, and the equipment operating parameters are adjusted within a preset range B or a preset range C, so as to effectively verify the analysis of the equipment operating parameters, so as to quickly find the influencing factors and improve the accuracy of the determination of the influencing factors.

[0006] The object of the present invention can be achieved by the following technical solutions: an offshore drilling top tension riser system operation safety analysis system, including a supervision platform, an equipment operation supervision unit, a marine environment supervision unit, a proofreading and control unit, a strengthening control unit, and an early warning unit;

[0007] The equipment operation supervision unit is used to obtain the equipment operation parameters of the riser when it is working, analyze the equipment operation parameters to generate operation parameter floating values, and generate operation risk signals and operation safety signals according to the operation parameter floating values, obtain the corresponding risk operation parameters according to the operation risk signals, and send the operation risk signals to the proofreading and control unit and the early warning unit via the supervision platform;

[0008] After receiving the operation risk signal, the proofreading and control unit obtains the risk operation parameters in the equipment operation supervision unit, and adjusts the risk operation parameters within the preset range A, regenerates multiple operation parameter floating values, and generates an operation continuous risk signal and an operation safety signal according to the newly obtained operation parameter floating values, and sends the operation continuous risk signal to the enhanced control unit;

[0009] The marine environment monitoring unit is used to obtain the marine environment interference parameters of the riser when it is working, analyze the marine environment interference parameters to generate environmental interference values, and send the environmental interference values ​​to the enhanced control unit via the monitoring platform;

[0010] After receiving the continuous operation risk signal, the enhanced control unit analyzes the environmental interference value to generate an environmental safety signal and an environmental interference signal, and adjusts the equipment operation parameters within a preset B range or a preset C range accordingly. The preset B range and the preset C range both refer to a comprehensive adjustment of the equipment risk operation parameters from a small to a large range, and regenerate multiple operating parameter floating values ​​respectively, and evaluate and analyze the generated operating parameter floating values, thereby generating a control success signal and a control failure signal, and sending the control failure signal to the early warning unit.

[0011] As a preferred embodiment of the present invention, the specific operation process of the equipment operation supervision unit includes: setting multiple monitoring time points within the monitoring period at a preset time, collecting multiple sets of equipment operation parameters at the multiple monitoring time points, the equipment operation parameters including riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature, respectively calculating the square of the difference between the riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature and the preset tension threshold, preset displacement threshold, preset vibration frequency threshold, preset pressure threshold, and preset temperature threshold stored in the supervision platform to obtain the tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value;

[0012] The tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value are respectively grouped into sets, and the mean in each set is obtained, which are marked as tension floating mean, displacement floating mean, vibration frequency floating mean, pressure floating mean, and temperature floating mean respectively;

[0013] The floating value of the operating parameter is obtained by numerically calculating the floating mean value of the tension, the floating mean value of the displacement, the floating mean value of the vibration frequency, the floating mean value of the pressure and the floating mean value of the temperature. The floating value of the operating parameter is compared with the preset floating threshold value of the operating parameter. When the floating value of the operating parameter is greater than or equal to the preset floating threshold value of the operating parameter, an operating risk signal is generated, and the risk operating parameters are determined based on the operating risk signal. Otherwise, an operating safety signal is generated.

[0014] As a preferred embodiment of the present invention, the proofreading and control unit groups the obtained multiple operating parameter floating values ​​YCF into a set A, selects the smallest operating parameter floating value YCF in the set A for comparison with the preset operating parameter floating threshold, and when the operating parameter floating value YCF is less than the preset operating parameter floating threshold, generates an operation safety signal, and obtains the risk operating parameter adjustment value corresponding to the minimum operating parameter floating value YCF, and when the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold, generates an operation continuous risk signal.

[0015] As a preferred embodiment of the present invention, the specific operation process of the marine environment monitoring unit includes: obtaining multiple sets of marine environment interference parameters at multiple monitoring time points, the marine environment interference parameters including wind speed values, ocean current values, wave height values, and sea water temperature values, and numerically calculating the marine environment interference parameters to obtain environmental interference values.

[0016] As a preferred embodiment of the present invention, after receiving the continuous operation risk signal, the enhanced control unit retrieves the environmental interference values ​​HGZ obtained at multiple monitoring time points, marks the ratio between the sum of the multiple environmental interference values ​​HGZ and the number as the environmental interference assessment value, compares the environmental interference assessment value with the preset environmental interference threshold, and generates an environmental interference signal when the environmental interference assessment value is greater than or equal to the preset environmental interference threshold, otherwise an environmental safety signal is generated.

[0017] As a preferred embodiment of the present invention, the enhanced control unit organizes the obtained multiple operating parameter floating values ​​YCF into a set B, selects the smallest operating parameter floating value YCF in the set B for comparison with the preset operating parameter floating threshold, and generates a control success signal when the operating parameter floating value YCF is less than the preset operating parameter floating threshold, and obtains the equipment operating parameter adjustment value corresponding to the minimum operating parameter floating value YCF, and generates a control failure signal when the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) This scheme is to collect various equipment operating parameters of the riser during operation through the equipment operation supervision unit, comprehensively analyze the equipment operating parameters to generate operating parameter floating values, and use the operating parameter floating values ​​as the judgment factors of operation risk. When an operation risk signal is generated, the equipment risk operation parameters are adjusted within the preset A range, and the regenerated operating parameter floating values ​​are evaluated and analyzed again. This is used as a basis for determining whether to conduct a comprehensive analysis in combination with marine environmental interference factors. When a continuous risk signal is generated, the environmental interference value is analyzed, and the equipment operating parameters are adjusted within the preset B range or the preset C range. The analysis of the equipment operating parameters is effectively verified, so that the influencing factors can be quickly found and the accuracy of the judgment of the influencing factors can be improved.

[0020] (2) This scheme also combines the marine environmental interference parameters for comprehensive judgment. Only when the signal obtained after the first adjustment of the risk operation parameters is a continuous operation risk signal, the marine environmental interference parameters are analyzed to generate an environmental interference value, and the environmental interference value is used as a judgment factor to adjust the equipment operation parameters within the preset B range or the preset C range, thereby effectively adjusting the equipment operation parameters within different degrees under different marine environments, effectively capturing its abnormal operation conditions and providing timely feedback and warnings to ensure the safety of the riser operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a principle block diagram of the present invention. DETAILED DESCRIPTION

[0022] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0023] Example 1: The present invention discloses an offshore drilling top tension riser system operation safety analysis system, please refer to Figure 1 , including supervision platform, equipment operation supervision unit, marine environment supervision unit, proofreading and control unit, strengthened control unit and early warning and control unit.

[0024] The equipment operation monitoring unit is used to obtain the equipment operation parameters of the riser when it is working. The equipment operation parameters include riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature;

[0025] Select a monitoring period, set multiple monitoring time points within the monitoring period at a preset time, collect multiple sets of equipment operating parameters at multiple monitoring time points, calculate the square of the difference between the riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature and the preset tension threshold, preset displacement threshold, preset vibration frequency threshold, preset pressure threshold, and preset temperature threshold stored in the supervision platform, and obtain the tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value;

[0026] The tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value are respectively grouped into sets, and the mean in each set is obtained, which are marked as tension floating mean, displacement floating mean, vibration frequency floating mean, pressure floating mean, and temperature floating mean respectively;

[0027] The floating value of the operating parameters is obtained by numerically calculating the floating mean of tension, the floating mean of displacement, the floating mean of vibration frequency, the floating mean of pressure, and the floating mean of temperature. Specifically, the floating value of the operating parameters is marked as ZF, WF, ZPF, PF, and WF respectively, and the floating value of the operating parameters YCF is generated according to the formula. , where a1, a2, a3, a4, and a5 represent preset proportional coefficients of the floating mean value of tension, the floating mean value of displacement, the floating mean value of vibration frequency, the floating mean value of pressure, and the floating mean value of temperature, respectively, and a1, a2, a3, a4, and a5 are all natural numbers greater than 1;

[0028] The operating parameter floating value is compared with the preset operating parameter floating threshold. When the operating parameter floating value is greater than or equal to the preset operating parameter floating threshold, an operating risk signal is generated, and the risk operating parameter is determined according to the operating risk signal. The larger the operating parameter floating value YCF is, the greater the risk factor of the riser in the operation process is, and the more unfavorable it is for safe operation. The operating risk signal is sent to the proofreading and control unit and the early warning unit via the supervision platform;

[0029] On the contrary, an operation safety signal is generated. When an operation safety signal is generated, it indicates that the risk factor of the riser is low during operation.

[0030] After receiving the operation risk signal, the proofreading and control unit obtains the risk operation parameters in the equipment operation supervision unit, and adjusts the risk operation parameters within the preset range A. The A range refers to the targeted adjustment of the equipment risk operation parameters from small to large, and regenerates multiple operation parameter floating values ​​during the adjustment process. The obtained multiple operation parameter floating values ​​YCF form a set A, and the smallest operation parameter floating value YCF in the set A is selected for comparison with the preset operation parameter floating threshold. When the operation parameter floating value YCF is less than the preset operation parameter floating threshold, an operation safety signal is generated, and the risk operation parameter adjustment value corresponding to the minimum operation parameter floating value YCF is obtained. On the basis of the current equipment operation parameters, the risk operation parameters are adjusted with the risk operation parameter adjustment value corresponding to the minimum operation parameter floating value YCF.

[0031] When the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold, an operation continuous risk signal is generated, and the operation continuous risk signal is sent to the enhanced control unit. After the risk operating parameters are adjusted and operated, if a operation continuous risk signal is generated, it means that the risk operating parameters are adjusted within the preset range A, and it is still difficult for the equipment to meet the safety standards during operation. Therefore, it is largely affected by the current marine environment.

[0032] Embodiment 2: The marine environment monitoring unit is used to obtain the marine environment interference parameters of the riser when it is working. The marine environment interference parameters include wind speed value, ocean current value, wave height value, and sea water temperature value. Wind speed, ocean current, wave height, and sea water temperature all have an impact on key parameters such as tension, displacement, vibration, pressure, and temperature during the operation of the riser;

[0033] The marine environment supervision unit obtains multiple sets of marine environmental interference parameters at multiple monitoring time points, marks the wind speed value, ocean current value, wave height value, and sea temperature value as FZ, YZ, HZ, and WZ respectively, and generates the environmental interference value HGZ according to the formula. , where b1, b2, b3, and b4 represent the preset proportional coefficients of wind speed, ocean current, wave height, and seawater temperature, respectively, and b1, b2, b3, and b4 are all natural numbers greater than 1. The environmental interference value is sent to the enhanced control unit via the supervision platform. The larger the environmental interference value, the worse the environment during the current monitoring period, which has a greater impact on the operational stability of the riser.

[0034] After receiving the continuous operation risk signal, the enhanced control unit retrieves the environmental interference value HGZ in the marine environment supervision unit, marks the ratio between the sum of multiple environmental interference values ​​HGZ and the number as the environmental interference assessment value, compares the environmental interference assessment value with the preset environmental interference threshold, and generates an environmental interference signal when the environmental interference assessment value is greater than or equal to the preset environmental interference threshold, otherwise, generates an environmental safety signal;

[0035] When the enhanced control unit generates an environmental safety signal, the equipment operating parameters are adjusted within the preset B range accordingly. When the enhanced control unit generates an environmental interference signal, the equipment operating parameters are adjusted within the preset C range accordingly. The preset B range and the preset C range both refer to comprehensive adjustment of equipment risk operating parameters from small to large ranges. The preset B range and the preset C range are two adjustment ranges for different signals, respectively. Multiple operating parameter floating values ​​are regenerated respectively, and the obtained multiple operating parameter floating values ​​YCF are combined into a set B. The smallest operating parameter floating value YCF in the set B is selected for comparison with the preset operating parameter floating threshold. When the operating parameter floating value YCF is less than the preset operating parameter floating threshold, a control success signal is generated, and the equipment operating parameter adjustment value corresponding to the minimum operating parameter floating value YCF is obtained. The equipment operating parameter adjustment value is used to adjust the original equipment operating parameters to ensure that the riser can operate safely in the marine environment.

[0036] When the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold, an unsuccessful control signal is generated and sent to the early warning unit. The early warning unit takes corresponding measures according to the unsuccessful control signal, such as shutting down for inspection.

[0037] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. An offshore drilling top tension riser system operation safety analysis system, characterized in that: It includes supervision platform, equipment operation supervision unit, marine environment supervision unit, proofreading and control unit, enhanced control unit and early warning unit; The equipment operation supervision unit is used to obtain the equipment operation parameters of the riser when it is working, analyze the equipment operation parameters to generate operation parameter floating values, and generate operation risk signals and operation safety signals according to the operation parameter floating values, obtain the corresponding risk operation parameters according to the operation risk signals, and send the operation risk signals to the proofreading and control unit and the early warning unit via the supervision platform; After receiving the operation risk signal, the proofreading and control unit obtains the risk operation parameters in the equipment operation supervision unit, and adjusts the risk operation parameters within a preset range A, where the range A refers to the targeted adjustment of the equipment risk operation parameters from small to large, regenerates multiple operation parameter floating values, and generates an operation continuous risk signal and an operation safety signal according to the newly obtained operation parameter floating values, and sends the operation continuous risk signal to the enhanced control unit; The marine environment monitoring unit is used to obtain the marine environment interference parameters of the riser when it is working, analyze the marine environment interference parameters to generate environmental interference values, and send the environmental interference values ​​to the enhanced control unit via the monitoring platform; After receiving the continuous operation risk signal, the enhanced control unit analyzes the environmental interference value to generate an environmental safety signal and an environmental interference signal, and accordingly adjusts the equipment operation parameters within a preset B range or a preset C range, and regenerates a plurality of operating parameter floating values, and evaluates and analyzes the operating parameter floating values ​​generated this time, and accordingly generates a control success signal and a control failure signal, and sends the control failure signal to the early warning unit; When the enhanced control unit generates an environmental safety signal, the equipment operating parameters are adjusted within the preset B range accordingly. When the enhanced control unit generates an environmental interference signal, the equipment operating parameters are adjusted within the preset C range accordingly. The preset B range and the preset C range both refer to comprehensive adjustments of equipment risk operating parameters from small to large. The preset B range and the preset C range are two adjustment ranges for different signals, respectively, which regenerate multiple operating parameter floating values.

2. The offshore drilling top tension riser system operation safety analysis system according to claim 1, characterized in that: The specific operation process of the equipment operation supervision unit includes: setting multiple monitoring time points within the monitoring cycle at a preset time, collecting multiple sets of equipment operation parameters at the multiple monitoring time points, the equipment operation parameters including riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature, respectively calculating the square of the difference between the riser tension, riser displacement, riser vibration frequency, riser pressure, and riser temperature and the preset tension threshold, preset displacement threshold, preset vibration frequency threshold, preset pressure threshold, and preset temperature threshold stored in the supervision platform to obtain the tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value; The tension floating value, displacement floating value, vibration frequency floating value, pressure floating value, and temperature floating value are respectively grouped into sets, and the mean in each set is obtained, which are marked as tension floating mean, displacement floating mean, vibration frequency floating mean, pressure floating mean, and temperature floating mean respectively; The floating value of the operating parameter is obtained by numerically calculating the floating mean value of the tension, the floating mean value of the displacement, the floating mean value of the vibration frequency, the floating mean value of the pressure and the floating mean value of the temperature. The floating value of the operating parameter is compared with the preset floating threshold value of the operating parameter. When the floating value of the operating parameter is greater than or equal to the preset floating threshold value of the operating parameter, an operating risk signal is generated, and the risk operating parameters are determined based on the operating risk signal. Otherwise, an operating safety signal is generated.

3. The offshore drilling top tension riser system operation safety analysis system according to claim 2, characterized in that: The proofreading and control unit groups the obtained multiple operating parameter floating values ​​YCF into a set A, selects the smallest operating parameter floating value YCF in the set A and compares it with the preset operating parameter floating threshold value; when the operating parameter floating value YCF is less than the preset operating parameter floating threshold value, an operating safety signal is generated, and the risk operating parameter adjustment value corresponding to the minimum operating parameter floating value YCF is obtained; when the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold value, an operating continuous risk signal is generated.

4. The offshore drilling top tension riser system operation safety analysis system according to claim 3, characterized in that: The specific operation process of the marine environment monitoring unit includes: obtaining multiple sets of marine environment interference parameters at multiple monitoring time points, the marine environment interference parameters include wind speed values, ocean current values, wave height values, and sea water temperature values, and numerically calculating the marine environment interference parameters to obtain environmental interference values.

5. The offshore drilling top tension riser system operation safety analysis system according to claim 4, characterized in that: After receiving the continuous operation risk signal, the enhanced control unit retrieves the environmental interference values ​​HGZ obtained at multiple monitoring time points, marks the ratio between the sum of the multiple environmental interference values ​​HGZ and the number as the environmental interference assessment value, compares the environmental interference assessment value with the preset environmental interference threshold, and generates an environmental interference signal when the environmental interference assessment value is greater than or equal to the preset environmental interference threshold, otherwise an environmental safety signal is generated.

6. The offshore drilling top tension riser system operation safety analysis system according to claim 5, characterized in that: The enhanced control unit groups the obtained multiple operating parameter floating values ​​YCF into a set B, selects the smallest operating parameter floating value YCF in the set B and compares it with the preset operating parameter floating threshold. When the operating parameter floating value YCF is less than the preset operating parameter floating threshold, a control success signal is generated, and the equipment operating parameter adjustment value corresponding to the minimum operating parameter floating value YCF is obtained. When the operating parameter floating value YCF is greater than or equal to the preset operating parameter floating threshold, a control failure signal is generated.

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