Advanced Flowing Material Balance To Determine Original Gas in Place of Shale Gas Considering Adsorption Hysteresis
- Lang He (Southwest Petroleum University, Chengdu) | Haiyan Mei (Southwest Petroleum University, Chengdu) | Xinrui Hu (Southwest Petroleum University, Chengdu) | Morteza Dejam (University of Wyoming) | Zuhao Kou (University of Wyoming) | Maolin Zhang (Yangtze University, Wuhan)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- March 2019
- Document Type
- Journal Paper
- 2019.Society of Petroleum Engineers
- original gas in place, pseudodeviation factor, adsorption hysteresis, material balance equation, flowing material balance
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- 258 since 2007
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A series of shale gas adsorption and desorption experiments are conducted. Desorption and adsorption curves are not coincident, with the former located above the latter, which suggests that adsorption hysteresis also occurs in shale gas. Pseudodeviation factor (Z*) is revised to advance the material-balance equation (MBE) and flowing material balance (FMB). The case study of the Fuling Shale in China illustrates that original gas in place (OGIP) of all three wells (1-HF, 2-HF, and 3-HF) calculated by conventional FMB is lower than that calculated by refined FMB, which has accounted for adsorption hysteresis. The conventional FMB underestimates OGIP of the three wells by 2.21, 3.29, and 4.02%, respectively. Adsorption hysteresis should be accounted for to accurately determine OGIP.
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