Sealed Rock Desorption Testing for Consistent Oil Gas Water Measurement
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Solution Overview
Problem
Existing methods for measuring oil, gas, and water contents in rock require separate experimental devices, leading to inconsistent and uncertain geological interpretation due to gas dissipation and sample heterogeneity.
Innovation Solution
A testing device and method that integrates a heating desorption unit, cold trap collection unit, light hydrocarbon capture unit, and gas measuring unit to simultaneously measure oil, gas, and water contents in rock, using a crushing mechanism, heating, and magnetostrictive assembly for precise volume calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate experimental devices are used to measure oil, gas and water contents in rock, then each component can be measured independently, but the measurement results are inconsistent and uncertain due to gas dissipation and sample heterogeneity
Solution Approach 1:
The patent combines multiple separate measurement functions (oil content measurement, gas content measurement, and water content measurement) into a single integrated testing device. The device includes a heating desorption unit, cold trap collection unit, light hydrocarbon capture unit, and gas measuring unit that work together to simultaneously measure all three components from one rock sample, eliminating the need for multiple separate experiments and ensuring measurement consistency.
Solution Approach 2:
The testing device is designed with multi-functionality to perform oil content measurement, gas content measurement, and water content measurement using the same sample. The heating desorption unit can heat the sample to different temperatures, the cold trap collection unit can collect different components at different temperature ranges, enabling one device to replace multiple specialized devices.
2Loss of information
If rock samples are processed through multiple separate experiments, then each component analysis can be performed with specialized equipment, but gas dissipation occurs leading to loss of information
Solution Approach 1:
The device performs preliminary heating and desorption of the rock sample in the heating desorption unit before separation and measurement. This preliminary action releases all trapped gases, oils, and water vapor simultaneously while the sample is still contained, preventing gas dissipation that would occur during sample handling in separate experiments. The desorbed components are then directly directed to the appropriate measurement units without exposure to the environment.
3Adaptability or versatility
If powder samples are used for extraction and pyrolysis, then standard methods can be applied, but block sample analysis is limited and oil potential experiments are insufficient
Solution Approach 1:
The testing device is designed to accept and process both powder samples and block samples (core samples). The heating desorption unit can handle samples in different physical forms, and the crushing mechanism can reduce block samples to powder if needed. This universality allows the device to perform both standardized powder sample analysis and novel block sample analysis, expanding the range of applicable experiments while maintaining measurement rigor.
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 simultaneous measurement of full-diameter core samples with accurate restoration of gas volume, reducing data mismatch and enhancing operational efficiency.
Implementation Method 1
a heating mechanism, the heating desorption unit being configured to crush and heat the rock sample in a sealed manner
Implementation Method 2
a cold trap collection unit in communication with the sample chamber, for capturing and separating oil and water from the components to be detected
Implementation Method 3
a magnetostrictive assembly arranged inside the measuring tube, and a magneto detection assembly, wherein the magnetostrictive assembly is configured to generate magnetostrictive effect and twist when the gas is introduced into the measuring tube and a liquid level in the measuring tube changes
Data Source
AI summary
A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.