Downhole Thermal Sensor Module for Real-Time Fluid Property Measurement
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Solution Overview
Problem
Current methods for measuring thermophysical properties of downhole hydrocarbon fluids are inefficient, as they rely on lab analysis of samples that can be contaminated and take days or months, leading to inaccurate results due to phase transitions and environmental changes.
Innovation Solution
An improved sensor module that provides real-time measurements of thermal conductivity and specific heat capacity, capable of distinguishing between reservoir fluid and mud filtrate, using a thermal sensor module with a heat source and temperature sensors to calculate these properties in-situ, reducing contamination and improving data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If lab analysis of downhole fluid samples is used, then comprehensive thermophysical properties can be measured, but measurement time is extended to days or months and contamination risk increases
Solution Approach 1:
The patent replaces mechanical/lab-based analysis systems with downhole electronic sensors that directly measure thermal conductivity and heat capacity in-situ. The sensor module uses electrical heating elements and temperature sensors to determine thermophysical properties through electrical and thermal measurements, eliminating the need for physical sample transport and laboratory analysis.
Solution Approach 2:
The patent introduces a downhole sensor module as an intermediary device that interfaces between the formation fluids and the measurement system. This sensor module contains heating elements, temperature sensors, and processing electronics that enable direct in-situ measurements without requiring sample collection and transport to external laboratories.
2Measurement precision
If downhole fluid samples are collected and transported to lab, then thermophysical properties can be analyzed, but sample contamination and phase transition errors occur
Solution Approach 1:
The patent performs measurements in advance, directly at the formation location before any sample collection or transport occurs. The sensor module measures thermal conductivity and heat capacity in-situ, capturing the true formation fluid properties before contamination or phase changes can occur during sampling and transport processes.
Solution Approach 2:
The sensor module is designed to be self-contained and self-measuring, performing all thermophysical property determinations autonomously downhole without requiring external laboratory equipment or personnel. The device heats the fluid, measures temperature changes, calculates properties, and transmits data automatically, eliminating human handling and environmental exposure.
3Productivity
If real-time in-situ measurement is implemented, then measurement time is reduced and contamination is minimized, but device complexity increases
Solution Approach 1:
The sensor module is designed as a multi-functional downhole tool that can measure multiple thermophysical properties (thermal conductivity, heat capacity, and potentially other formation characteristics) using a single integrated device. This universal approach consolidates what would otherwise require multiple separate measurement systems into one compact sensor package.
Solution Approach 2:
The patent determines thermophysical properties by changing physical parameters during measurement - specifically by applying controlled heating (temperature change) and measuring the resulting thermal response. By varying temperature and measuring heat transfer rates, the system calculates thermal conductivity and heat capacity from the observed parameter changes, enabling real-time computation without complex analytical equipment.
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
Enables accurate and timely characterization of downhole fluids, enhancing production efficiency and reservoir management by providing real-time thermophysical property data, which can be used to optimize well completion and production processes.
Implementation Method 1
a heating element operable to apply heat to a downhole fluid sample
Implementation Method 2
a temperature sensor operable to measure a temperature of the downhole fluid sample
Data Source
AI summary
A thermal sensor module, comprising: a housing, wherein the housing comprises a first end and a second end, wherein the housing is hollow and configured to allow a fluid to flow into the housing through the first end and exit through the second end; a heat source, wherein the heat source is disposed at a central axis of the housing and traverses at least partially through the housing; and a temperature sensor, wherein the temperature sensor is positioned in the housing to measure temperature of the fluid flowing in the housing.