Fluid Compressibility Determination via Density Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining fluid compressibility in downhole fluid analysis require accurate measurement and control of fluid volume, making them costly and complex, and affecting the accuracy of compressibility calculations.
Innovation Solution
A method and apparatus that compute fluid compressibility by measuring fluid densities at multiple pressures, eliminating the need for precise volume measurement, using a pressure control unit, density sensor, and compressibility module to calculate compressibility based on density values, allowing for simpler and less expensive fluid chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If accurate measurement and control of fluid volume is implemented, then compressibility calculation accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the volume measurement and control requirement from the compressibility determination process. By using a chamber of known volume and eliminating the need to accurately measure or control fluid volume during compression, the method removes this complexity source while maintaining calculation accuracy through density measurements at different pressures
Solution Approach 2:
The patent replaces mechanical volume measurement and control systems with a computational approach. Instead of using complex mechanical devices to measure and control volume, the method uses density sensors and computational algorithms to determine compressibility from density changes at different pressures, substituting mechanical complexity with sensor and processing simplicity
2Measurement precision
If precise volume control is required, then compressibility measurement accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent employs a fluid chamber that does not require precise manufacturing tolerances for volume control. The chamber can be simpler and less expensive to manufacture because its finite compliance does not affect accuracy, allowing the use of more economical manufacturing methods and materials while maintaining measurement integrity
3Measurement precision
If finite compliance of fluid chambers is considered, then measurement accuracy is affected, but device complexity increases
Solution Approach 1:
The patent converts the potential harm of chamber finite compliance into a beneficial feature. Rather than requiring rigid, complex chambers with controlled compliance, the method accepts and accommodates the compliance of simpler chambers by using density measurements at multiple pressures, which inherently account for volume changes and eliminate the need for compliance control
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 determination of fluid compressibility without requiring precise volume control, facilitating real-time data collection and reducing equipment costs while maintaining accuracy.
Implementation Method 1
pressurizing the captured fluid to first and second pressures
Implementation Method 2
measuring first and second values representative of first and second densities of the fluid while pressurized
Implementation Method 3
computing a third value representative of a compressibility of the fluid using the first and second values
Data Source
AI summary
Example methods and apparatus to determine the compressibility of a fluid are disclosed. A disclosed example method includes capturing a fluid in a chamber, pressurizing the captured fluid to first and second pressures, measuring first and second values representative of first and second densities of the fluid while pressurized at respective ones of the first and second pressures, and computing a third value representative of a compressibility of the fluid using the first and second values.