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Abstract

Summary

Equation of state (EOS), void volume, pressure sensor accuracy and blank test are identified as major factors to affect the accurate measurement of gas adsorption capacity on shale. In the EOS, the Se-W equation is the most suitable for the calculation of the methane adsorption capacity of the shale, and the second is the S-R-K equation. P-R equation is the worst. Adsorption capacity of shale is negatively related with void volume. The void volume has an error that measurement value is larger than real, which would result in reducing adsorption capacity of the shale in test. Under the condition of high pressure, the effect of void volume error on the adsorption quantity is more serious. Comparison with the temperature sensor, the influence of pressure sensor accuracy on the shale methane adsorption capacity is more prominent. The adsorption capacity test accuracy and stability of measurement system with 10–4 precision pressure sensor superior to that with 10–3 precision pressure sensor. In addition, the test adsorption capacity of the shale which is not corrected by the blank test is usually lower than the actual adsorption capacity, and possibly leads to negative values of adsorption.

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/content/papers/10.3997/2214-4609.201801307
2018-06-11
2024-04-19

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801307
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Quantitative Analysis for Affecting Factors of Gas Adsorption Capacity Measurement on the Shales
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201801307
/content/papers/10.3997/2214-4609.201801307
/content/papers/10.3997/2214-4609.201801307
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