X-ray Test Device for Sulfur Deposition Rock Sample Evaluation
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Solution Overview
Problem
Current methods lack effective evaluation and analysis of sulfur deposition distribution and the plugging removal effect of sulfur dissolvents in sour gas reservoirs, leading to reduced production capacity due to reservoir damage.
Innovation Solution
An X-ray-based test device and method that uses X-ray diffraction to assess core density changes, determining sulfur deposition distribution and the effective swept area of a sulfur dissolvent, allowing for comprehensive evaluation of plugging removal efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional core damage evaluation methods are used, then the assessment of sulfur deposition damage is achieved, but the distribution of sulfur deposition and effective swept area cannot be determined
Solution Approach 1:
The patent introduces X-ray technology as an intermediary measurement method to indirectly observe sulfur deposition distribution within the core. By measuring X-ray absorption coefficients at different positions, the system can map sulfur deposition patterns and effective swept areas without direct observation, thus resolving the information loss problem while maintaining evaluation precision.
2Productivity
If sulfur dissolvent injection is performed to recover reservoir permeability, then the production capacity can be increased, but the plugging removal effect cannot be comprehensively evaluated
Solution Approach 1:
The patent implements a feedback mechanism by using X-ray measurements to continuously monitor changes in sulfur deposition distribution before and after sulfur dissolvent injection. This provides quantitative feedback on the plugging removal effect, allowing comprehensive evaluation of whether the injection successfully restored permeability and identified the effective swept area.
3Measurement precision
If X-ray diffraction is used to measure core density distribution, then the sulfur deposition distribution can be obtained, but the device complexity increases
Solution Approach 1:
The patent designs the test device with multi-functionality, where the X-ray measurement system serves multiple purposes: measuring core density distribution, mapping sulfur deposition patterns, and evaluating dissolvent injection effectiveness. By consolidating these functions into a single integrated system, the device complexity is managed while achieving high measurement precision.
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
Quantitatively analyzes sulfur deposition distribution and the effective swept area of sulfur dissolvents, providing significant insights into their plugging removal effectiveness and permeability recovery in sour gas wells.
Implementation Method 1
The X-ray generator is used for emitting X-rays to vertically irradiate the core holder, and the X-ray detector is used for completely receiving the X-rays
Implementation Method 2
the change of core density distribution is obtained through X-ray diffraction
Data Source
AI summary
An X-ray-based test device for a plugging removal effect of a sulfur dissolvent on a sulfur deposition rock sample includes a constant speed and pressure pump, a first intermediate container, a second intermediate container, a first pressure transmitter, a core holder, a second pressure transmitter, a first electric pump, a third intermediate container, a back-pressure valve, a gas flow meter, an H2S neutralization tank, a second electric pump, a back-pressure transmitter, a confining pressure transmitter, an X-ray generator, an X-ray detector and a thermotank. A sour gas sample is placed in the first intermediate container, and nitrogen is filled in the second intermediate container. The sulfur dissolvent is placed into the third intermediate container. A confining pressure inlet is formed in the core holder. The test device may be used for evaluating the plugging removal effect of the sulfur dissolvent injected into the sulfur deposition rock sample.