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.

中文翻译：

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气体吸附，吸附和吸附孔隙率及其对页岩气在位计算的影响的实验研究

页岩气储层中气体吸附能力的测量对于理解储气和资源评估机制具有重要意义。在这项研究中，对页岩样品进行了气体吸附实验，并提出了一种气体吸附分析模型。该模型已使用先前发布的数据进行了验证。这样，通过结合气体吸附方程和应力方程分析有效孔隙度，并使用先前和新提出的方法来计算页岩气就位值（GIP）。还检查了孔隙度（吸附​​/吸附）对页岩气GIP的影响。结果表明，所提出的模型提供了吸附气体和吸收气体对总储气量的贡献，其结果优于Langmuir模型。此外，还确定有效孔隙度是表征页岩气储层特征的关键部分，并且随着孔隙压力的增加而降低。结果还表明，使用新提出的方法，由于低压下的气体吸收，可以获得更高的总储气量。另外，随着压力的增加，根据页岩样品特性即吸收和吸附，总储气量增加。此外，总气体存储量也由于吸附/吸附的孔隙率而改变。在这项研究中观察到吸收的气体量为18.99-19.45％。使用新提出的方法。另外，随着压力的增加，根据页岩样品特性即吸收和吸附，总储气量增加。此外，总气体存储量也由于吸附/吸附的孔隙率而改变。在这项研究中观察到吸收的气体量为18.99-19.45％。使用新提出的方法。另外，随着压力的增加，根据页岩样品特性即吸收和吸附，总储气量增加。此外，总气体存储量也由于吸附/吸附的孔隙率而改变。在这项研究中观察到吸收的气体量为18.99-19.45％。