Downhole Thermal Response Tool for In-Situ Fluid Characterization
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Solution Overview
Problem
Current methods for characterizing fluids in hydrocarbon reservoirs are limited by their inability to perform direct in-situ determination, leading to inaccuracies and delays in drilling and production operations.
Innovation Solution
A downhole tool equipped with temperature sensors and heating elements, such as ceramic mesh heating elements coupled with RF antennas, measures the thermal response of fluids, allowing for the determination of properties like heat capacity, diffusivity, and thermal conductivity by matching thermal responses with known fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional downhole tools and core sampling techniques are used to determine fluid information, then the determination can be performed, but the accuracy of fluid information is insufficient and delays occur in drilling and production operations
Solution Approach 1:
The patent replaces traditional mechanical core sampling techniques with electromagnetic radiation-based measurement. The tool uses electromagnetic radiation to directly measure fluid properties in-situ, eliminating the need for physical sample retrieval and laboratory analysis, thereby improving both accuracy and reducing time loss.
Solution Approach 2:
The patent introduces an intermediary measurement approach using electromagnetic radiation as a mediator between the downhole tool and the fluid. This intermediary method enables indirect but accurate measurement of fluid properties without direct physical contact or sampling, resolving the contradiction between accuracy and time efficiency.
2Measurement precision
If direct in-situ determination methods are implemented, then accuracy of fluid information improves, but device complexity increases
Solution Approach 1:
The downhole tool is designed with multi-functionality, integrating electromagnetic radiation sources, detectors, and measurement capabilities into a single universal device. This allows the tool to perform multiple functions (emitting radiation, detecting radiation, measuring fluid properties) without requiring separate complex systems, thereby achieving high accuracy while controlling device complexity.
3Measurement precision
If electromagnetic radiation is used to heat and measure fluid thermal response, then accurate fluid property determination is achieved, but energy consumption increases
Solution Approach 1:
The patent employs periodic action by using pulsed electromagnetic radiation rather than continuous radiation. The electromagnetic source emits radiation in pulses to heat the fluid, and detectors measure the thermal response during specific time intervals. This periodic approach achieves accurate fluid property determination while significantly reducing overall energy consumption compared to continuous heating.
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
This approach provides more accurate and direct characterization of downhole fluids, enhancing the efficiency and accuracy of hydrocarbon reservoir analysis, reducing costs and time compared to traditional methods.
Implementation Method 1
a heating element disposed at a position along the axial length of the tool body such that the heating element is disposed between two of the plurality of temperature sensors and the heating element is configured to heat the fluid
Implementation Method 2
a plurality of temperature sensors disposed at a respective plurality of positions along an axial length of the tool body. Each of the plurality of temperature sensors is configured to acquire a temperature measurement of the fluid
Data Source
AI summary
Tools, processes, and systems for in-situ fluid characterization based on a thermal response of a fluid are provided. The thermal response of a downhole fluid may be measured using a downhole thermal response tool and compared with thermal responses associated with known fluids. The properties of the downhole fluid, such as heat capacity, diffusivity, and thermal conductivity, may be determined by matching the thermal response of the downhole fluid with a thermal response of a known fluid and using the properties associated with the known fluid. The composition of the downhole fluid may be determined by matching the viscosity of the downhole fluid to the viscosity of known fluid. A downhole thermal response tool for cased wellbores or wellbore sections and a downhole thermal response tool for openhole wellbores or wellbore sections are provided.