AN EXPERIMENTAL STUDY OF GAS SORPTION, ADSORBED, AND SORBED POROSITY, AND THEIR IMPACT ON SHALE GAS-IN-PLACE CALCULATIONS
AN EXPERIMENTAL STUDY OF GAS SORPTION, ADSORBED, AND SORBED POROSITY, AND THEIR IMPACT ON SHALE GAS-IN-PLACE CALCULATIONS
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DOI：
10.1615/jpormedia.2020033387
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发表时间：
2020-01-01
影响因子：
2.3
通讯作者：
Ren, Xiaoxia
中科院分区：
文献类型：
--
作者：
Memon, Asadullah;Li, Aifen;Ren, Xiaoxia
Measurement of gas sorption capacity in a shale gas reservoir is significant to comprehending the mechanism of gas storage and resource assessments. In this study, gas sorption experiments on shale samples have been conducted, and a gas sorption analytical model has been proposed. This model is validated with previously published data. With this, the effective porosity is analyzed by combining the gas sorption and stress equations, and the shale gas-in-place (GIP) is calculated using a previous and newly proposed method. The influence of porosity (adsorbed/sorbed) on shale GIP is also examined. The results show that the proposed model provides the adsorbed and absorbed gases' contribution in total gas storage capacity, and its results are better than the Langmuir model. Moreover, it is also determined that the effective porosity performs a key part in characterizing the shale gas reservoirs, and it decreases with the increase in pore pressure. The results also reveal that higher total gas storages are obtained due to gas absorption, at low pressure, using the new proposed method. Further, with the increase in pressure, the total gas storage capacity increases, according to the shale sample characteristics, i.e., absorption and adsorption. Furthermore, the total gas storage is also altered due to adsorbed/sorbed porosity. The amount of absorbed gas ranges from 18.99-19.45% and is observed in this study.
