Optical Fiber Reservoir Monitoring for Deep-Water Flow Assurance
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Solution Overview
Problem
Current technologies lack effective real-time monitoring and analysis methods for deep-water hydrocarbon reservoirs under the FPSO development mode, making it difficult to guarantee the flow of hydrocarbon reservoirs.
Innovation Solution
An oil well optical fiber multi-parameter testing method and apparatus that collects temperature, pressure, and vibration data to perform temperature and vibration analyses, followed by conjoint analysis, to obtain production parameters and flow conclusions for hydrocarbon reservoirs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional monitoring technologies are used for deep-water hydrocarbon reservoirs under FPSO development mode, then the monitoring system can be implemented, but real-time continuous multi-parameter monitoring capability is insufficient
Solution Approach 1:
The patent combines temperature monitoring, pressure monitoring, and vibration monitoring into a single integrated optical fiber monitoring system. Multiple sensing functions are merged along the optical cable to enable simultaneous multi-parameter measurement, resolving the contradiction between system reliability and measurement precision by providing comprehensive real-time data for flow assurance.
Solution Approach 2:
The optical fiber monitoring system performs multiple functions including temperature sensing, pressure sensing, and vibration sensing within a single system. This multi-functional approach enables the system to provide comprehensive monitoring capabilities for deep-water hydrocarbon reservoirs, simultaneously improving reliability and measurement precision through unified real-time monitoring.
2Reliability
If real-time continuous monitoring is implemented for deep-water hydrocarbon reservoirs, then flow assurance capability is improved, but system complexity increases
Solution Approach 1:
The patent uses optical fiber as an intermediary sensing medium that can be deployed along the wellbore and production facilities. The optical fiber acts as a distributed sensor that transmits measurement data back to the surface, enabling real-time monitoring without requiring complex downhole electronics or power systems, thus improving flow assurance while managing system complexity.
Solution Approach 2:
The patent replaces traditional mechanical sensing systems with optical fiber-based sensing. This substitution eliminates the need for complex mechanical components, moving parts, and electrical systems in harsh downhole environments, reducing system complexity while maintaining real-time monitoring capability for flow assurance.
3Measurement precision
If distributed multi-parameter sensing is deployed in deep-water reservoirs, then monitoring coverage is enhanced, but cost increases
Solution Approach 1:
The patent divides the monitoring system into distributed sensing segments along the optical fiber length. Each segment of the optical cable provides sensing capability for temperature, pressure, and vibration at its location, creating a distributed network of measurement points. This segmentation approach enhances monitoring coverage across the entire deep-water reservoir system while optimizing cost by using a single continuous optical fiber rather than multiple discrete sensors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides direct, economical, long-term, online, and continuous monitoring of deep-water hydrocarbon reservoirs, ensuring smooth flow and production parameters, enhancing development benefits.
Implementation Method 1
obtaining, at a formation depth where a pipe string is located, a temperature micro-differential between a position of the hydrocarbon reservoir and a position of an inner wall of a wellbore due to thermal effect
Implementation Method 2
performing vibration analysis on the hydrocarbon reservoir according to the vibration data; obtaining a vibration frequency characteristic value according to a frequency expression formula; obtaining a vibration energy characteristic value according to an energy expression formula
Data Source
AI summary
Provided in the present disclosure are an oil well optical fiber multi-parameter testing method and apparatus. The method includes: collecting monitoring data at a preset position, and the monitoring data at least includes temperature data, pressure data and vibration data; performing temperature analysis on a hydrocarbon reservoir according to the temperature data; performing vibration analysis on the hydrocarbon reservoir according to the vibration data; performing conjoint analysis on the hydrocarbon reservoir according to the temperature data, the pressure data and the vibration data; obtaining production parameters of hydrocarbon reservoirs in different formations according to the conjoint analysis; and obtaining flow conclusions of the hydrocarbon reservoirs according to the production parameters of the hydrocarbon reservoirs. The present disclosure solves the technical problem that it is difficult to guarantee the flow of deep-water hydrocarbon reservoirs under an offshore FPSO development mode.