@Article{fdmp.2024.053496,
AUTHOR = {Haijie Zhang, Haifeng Zhao, Ming Jiang, Junwei Pu, Yuanping Luo, Weiming Chen, Tongtong Luo, Zhiqiang Li, Xinan Yu},
TITLE = {Estimated Ultimate Recovery and Productivity of Deep Shale Gas Horizontal Wells},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {1},
PAGES = {221--232},
URL = {http://www.techscience.com/fdmp/v21n1/59327},
ISSN = {1555-2578},
ABSTRACT = {Pressure control in deep shale gas horizontal wells can reduce the stress sensitivity of hydraulic fractures and improve the estimated ultimate recovery (EUR). In this study, a hydraulic fracture stress sensitivity model is proposed to characterize the effect of pressure drop rate on fracture permeability. Furthermore, a production prediction model is introduced accounting for a non-uniform hydraulic fracture conductivity distribution. The results reveal that increasing the fracture conductivity leads to a rapid daily production increase in the early stages. However, above 0.50 D·cm, a further increase in the fracture conductivity has a limited effect on shale gas production growth. The initial production is lower under pressure-controlled conditions than that under pressure-release. For extended pressure control durations, the cumulative production initially increases and then decreases. For a fracture conductivity of 0.10 D·cm, the increase in production output under controlled-pressure conditions is ~35%. For representative deep shale gas wells (Southern Sichuan, China), if the pressure drop rate under controlled-pressure conditions is reduced from 0.19 to 0.04 MPa/d, the EUR increase for 5 years of pressure-controlled production is 41.0 million, with an increase percentage of ~29%.},
DOI = {10.32604/fdmp.2024.053496}
}