Borehole Mud Composition Analysis via Thermal Conductivity
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Solution Overview
Problem
Current methods for determining mud composition in hydrocarbon well systems are time-consuming and prone to errors due to water loss, requiring significant processing time and frequent maintenance, limiting the frequency of composition analysis.
Innovation Solution
A method and system utilizing thermal conductivity measurements to calculate mud composition parameters, involving dilution of mud with a liquid to measure changes in thermal conductivity, allowing for rapid and accurate determination of altered mud composition, including oil-water ratio and average specific gravity, within a margin of error comparable to conventional retort processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a retort process is used to determine mud composition, then the composition can be analyzed, but the processing time is significant (thirty minutes or more)
Solution Approach 1:
The patent replaces the mechanical/thermal retort process with an electrical measurement system. A probe measures electrical properties (conductivity, capacitance, impedance) of the mud sample, and a processor calculates composition parameters from these electrical measurements, achieving rapid analysis without the time-consuming retort heating and distillation process
Solution Approach 2:
The patent changes the measurement parameter from thermal properties (retort process) to electrical properties (conductivity, capacitance, impedance). This parameter change enables much faster measurement while still providing accurate mud composition data through the relationship between electrical properties and mud composition
2Measurement precision
If a retort process is used to determine mud composition, then the composition can be analyzed, but water loss during the process skews the results
Solution Approach 1:
The patent replaces the thermal retort process that causes water loss with an electrical measurement system. The probe measures electrical conductivity and other parameters directly in the mud sample without heating or distillation, eliminating water loss and providing more reliable, accurate composition data
3Measurement precision
If a retort process is used to determine mud composition, then the composition can be analyzed, but cleaning the mud container is problematic
Solution Approach 1:
The patent replaces the retort heating process that leaves carbonized residue with electrical measurements performed in-situ or with simple rinsing. The probe measures electrical properties directly without requiring the container to withstand high temperatures, making cleaning straightforward with water or solvent rinses
Solution Approach 2:
The patent uses electrical field interactions to obtain measurement data without physical contact or adhesion issues. The electrical probe measures conductivity and other parameters through the mud sample without the sample adhering to measurement surfaces, eliminating cleaning problems
4Measurement precision
If the retort process is used, then mud composition can be determined, but the process cannot run frequently
Solution Approach 1:
The patent replaces the slow retort process with rapid electrical measurements that take seconds or minutes. The probe quickly measures electrical conductivity, capacitance, and impedance, and the processor rapidly calculates composition parameters, enabling frequent monitoring and high-productivity analysis
Solution Approach 2:
The patent enables continuous or near-continuous mud composition monitoring through rapid sequential electrical measurements. Multiple samples can be analyzed in quick succession, providing continuous data feedback for real-time mud management decisions
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 reduces processing time to approximately two to five minutes, improves accuracy, and allows for more frequent composition analysis, reducing maintenance and increasing the reliability of results, enabling real-time adjustments to well system operations.
Implementation Method 1
obtain a thermal conductivity measurement for a portion of the mud; measure a first thermal conductivity of contents of the first mud container
Data Source
AI summary
The disclosure presents a technique for predicting the composition of a borehole mud using a thermal conductivity parameter of the mud and a dilution liquid. The mud can be altered by conditions within the borehole, such as material, fluid, and temperature affecting the original mud composition pumped into the borehole location. The mud can be an oil-based, water-based, or another type of mud of a well system. The technique can extract a measured quantity of mud and place it into a mud container. A first thermal conductivity parameter can be calculated for the extracted mud. A dilution liquid can be mixed into the extracted mud in the mud container and a second thermal conductivity parameter calculation can be performed. From the calculated first and second thermal conductivity parameters, the composition of the mud, as well as the fractional proportions of the major components of the mud, can be predicted and computed.