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Shale gas-content comprehensive analysis device and method thereof

A comprehensive analysis and shale technology, applied in the field of oil and gas exploration and development, which can solve problems such as inconvenient analysis, unfavorable decision-making, gas loss and component changes

Pending Publication Date: 2019-03-29
NAT RESERACH CENT OF GEOANALYSIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This test method has the following defects: First, the chemical composition of the analytic gas samples collected at different times and different analytic stages is not exactly the same, and the gas composition analysis results cannot accurately reflect the true chemical composition of shale gas; Improper storage during transportation and long storage time will cause gas loss and composition changes, resulting in test errors; third, the gas composition data cannot be provided to site personnel in time, which is not conducive to site engineering decision-making
The unconventional reservoir rock nano-adsorption gas extraction device and its extraction and hydrocarbon analysis method obtain the information of the gas that is bound in the reservoir rock and will not be naturally resolved. In terms of technical solutions, the rock needs to be crushed at the nanoscale In addition, acid hydrolysis of rocks is required, which is not suitable for the analysis of the natural analyzable gas part in shale gas, which is dominant in content, and is not convenient for analysis at the shale gas drilling site

Method used

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  • Shale gas-content comprehensive analysis device and method thereof
  • Shale gas-content comprehensive analysis device and method thereof
  • Shale gas-content comprehensive analysis device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Analysis operation process

[0072] Based on the shale gas content measurement and gas component analysis of the shale gas-bearing comprehensive analysis device of the present invention, except that the loading, unloading, crushing and weighing of core samples are done manually, the rest of the instrument control work is performed by the described operation. The control unit is implemented under the control of the computer in accordance with the set procedures and parameters. Specifically, the following steps and contents are included:

[0073] 1. Instrument Preparation

[0074] (1) Connect the power supply of the instrument, start the computer of the operation control unit 23, and run the operation control software. Adjust the gas path of the instrument so that it is in "gas path mode A" (see figure 1 ). Open the pressure reducing valves for carrier gas 1, carrier gas 2, carrier gas 3, and carrier gas 4.

[0075] (2) Set the temperature of the thermostatic analysi...

Embodiment 2

[0105] Calculation and processing of analysis results

[0106] 1. Detector Calibration

[0107] 1.1 Detector calibration test

[0108]Close the carrier gas 1 on-off switch on the gas filter 8. From the standard gas inlet port that is installed on the gas filter 8, it is connected with all gas containing methane, ethane, propane, isobutane, n-butane, isopentane, n-pentane, nitrogen, oxygen, carbon monoxide, carbon dioxide, etc. A standard gas for the gas component to be detected. Let the standard gas flow into the gas filter 8 at a constant speed, and test the standard gas according to the normal sample testing instrument conditions and operating procedures, so as to determine the relationship between the detection signal intensity of the first detector 20 at the flow rate and the total volume of hydrocarbon gas For calibration, the relationship between the relative peak areas of the chromatographic peaks of the components of the second detector 21 and the third detector 22 ...

Embodiment 3

[0200] Standard gas analysis

[0201] (1) Gas composition: methane 85.88%, ethane 3.04%, propane 0.77%, isobutane 0.29%, n-butane 0.22%, isopentane 0.10%, n-pentane 0.10%, nitrogen 3.01%, oxygen 0.57% , carbon monoxide 4.98%, carbon dioxide 0.96%, other 0.08%.

[0202] (2) Test conditions

[0203] Carrier gas and its flow rate: carrier gas 1, hydrogen, flow 20mL / min; carrier gas 2, hydrogen, flow 63mL / min; carrier gas 3, hydrogen, flow 22mL / min; carrier gas 4, hydrogen, flow 30mL / min.

[0204] Limiting value of gas flow limiting valve 5: 200mL / min at 0.2MPa.

[0205] Sample loading loop volume: the volume of the first sample loading loop 9 is 0.5mL; the volume of the second sample loading loop 10 is 2.5mL.

[0206] Analytical constant temperature analytical chamber 6 temperature: 100°C,

[0207] Separation column temperature: The temperature of the separation column oven is 50°C.

[0208] Multi-way valve temperature: the temperature of the first multi-way valve 11 is 60°C...

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Abstract

The invention relates to a shale gas content comprehensive analysis device. The device comprises a gas content test unit, a hydrocarbon gas component analysis unit, an inorganic gas component analysisunit, and an operation control unit. The invention further discloses a shale gas content comprehensive analysis method based on the device. The technical scheme for resolving gas component and the change thereof in the online analysis and monitoring resolution process is realized when performing the gas content resolution test on the shale core at a shale gas drilling field by using the technicalscheme disclosed by the invention, the reliability and the instantaneity of the test data can be effectively improved, so that the test data can preferably serve the shale gas exploration and development engineering implementation, and provide more scientific and more reliable gas content data for the shale gas resource exploration and assessment.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a shale gas-bearing comprehensive analysis device and its method, which is a set of gas analysis and monitoring analysis process that analyzes and tests the shale core at the same time. Technical solutions for gas composition and its variation. Background technique [0002] Shale gas content is a key parameter for shale gas resource evaluation, and the quality of its test data is directly related to the reliability of shale gas resource evaluation results. Shale gas test includes two aspects: one is to measure the gas content of shale, and the other is to measure the content of each gas component in shale gas. At present, these two parts of the test are carried out at different times and places respectively, that is, the shale gas content is first analyzed and tested at the drilling site, the analyzed gas is collected, and then the gas components ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/16G01N30/02G01N30/66G01N30/68
CPCG01N7/16G01N30/02G01N30/66G01N30/68
Inventor 汪双清张小涛沈斌许智超
Owner NAT RESERACH CENT OF GEOANALYSIS
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