# US 12,602,522 B2 · Decision-making method and system for suspension operation of marine riser system based on digital twin

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- Number: US 12,602,522 B2
- Document ID: US12602522B2
- Status: Granted
- Kind: B2
- Application number: 17/748,386
- Filed: 2022-05-19
- Published: 2023-11-02
- Granted: 2026-04-14
- Earliest claimed: 2022-04-27
- Assignees: China University of Petroleum
- Applicants: China University of Petroleum
- Inventors: Xiuquan Liu; Yanwei Li; Pengji Hu; Zhaowei Liu; Na Qiu; Xianglei Wang; Yuanjiang Chang; Guoming Chen
- Web page: https://patentgrep.com/patent/US12602522B2

## CPC

- G06F 30/20: Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30)
- Y02A 90/10: Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

Provided is a decision-making method and system for a suspension operation of a marine riser system based on a digital twin, which belongs to the technical field of marine oil and gas development. The decision-making method includes: acquiring original monitoring data by the sensor group to establish a physical entity structure model; acquiring real-time monitoring data to establish a digital twin model of the physical entity structure; and introducing navigation path and speed of the drilling platform, and a configuration and suspension mode of the riser system, combined with the digital twin model of the marine riser coupling system and a limit performance parameter, providing a suspension operation decision-making model of the riser system, and making a real-time accurate suspension operation decision based on a multi-objective optimization algorithm, so as to guarantee a safe and efficient suspension operation of the riser system.

## Claims

### Claim 1

A method for a suspension operation of a marine riser system based on a digital twin, applied to a physical entity structure of a marine riser coupling system composed of a marine environment system, a drilling platform and a riser system, and arranged to monitor a sensor group of the physical entity structure, wherein the method comprises:
S1, acquiring original monitoring data by the sensor group to establish a physical entity structure model;
S2, acquiring real-time monitoring data from the sensor group to establish a digital twin model of the physical entity structure; and
S3, establishing a suspension operation model of the physical entity structure based on the digital twin model, and determining a position of the drilling platform from the suspension operation model
wherein step S1 specifically comprises:
S11, acquiring marine environment data and structural state data of the drilling platform and the physical entity structure respectively by the sensor group;
S12, processing the marine environment data and the structural state data based on a multi-source information processing technology; and
S13, constructing the physical entity monitoring model in combination with the marine environment data and the structural state data; and
wherein step S2 specifically comprises:
S21, acquiring the real-time monitoring data, and establishing a marine riser coupling system solution model composed of an environmental load model and a structural mechanics model based on a marine structural dynamics theory:
S22, using a frequency domain method to convert the marine riser coupling system solution model into a frequency response function model or a reverse inverse model established in a form of modal superposition;
S23, combining the frequency response function model or the reverse inverse model with the marine environment data and the structural state data to reversely obtain a flow profile of a steady-state ocean current;
S24, inputting the flow profile and the structural state data into the marine riser coupling system solution model, and acquiring dynamics simulation data of the physical entity structure;
S25, using a machine learning algorithm to train a difference value between the real-time monitoring data and the simulation data to obtain a data mapping model; and
S26, integrating the environmental load model, the structural mechanics model and the data mapping model to obtain the digital twin model.

### Claim 2 (depends on 1)

The method for the suspension operation of the marine riser system based on the digital twin according to claim 1, wherein the sensor group comprises a mechanical quantity sensor, an environmental parameter monitoring sensor and a position monitoring sensor.

### Claim 3 (depends on 1)

The method for the suspension operation of the marine riser system based on the digital twin according to claim 1, wherein the following steps are comprised before the step S23:
S23a, acquiring vibration attitude data of the physical entity structure; and
S23b, calculating an average number of the vibration attitude data to obtain a vibration center position of the physical entity structure.

### Claim 4 (depends on 3)

The method for the suspension operation of the marine riser system based on the digital twin according to claim 3, wherein the following steps are comprised after the step S23:
S23c, generating a specified motion by the drilling platform to obtain the vibration attitude data; and
S23d, using a heuristic method to perform joint reverse calculation and verification on the vibration attitude data.