A new tEDFM-based analysis of interference characterization in tight gas reservoir

Zekai Tang, Zhiming Chen, Jiapeng Han, Xin Zhao, Zhaowei Chen and Peng Tan

Energy, 2025, vol. 330, issue C

Abstract: Tight gas reservoirs are a key component of the global unconventional energy supply, yet their development is significantly challenged by inter-well interference. Quantitative methods for analyzing interference are scarce, and existing models often rely on idealized fracture assumptions. This study presents an inter-well interference model for tight gas reservoirs with complex fracture networks using the transient embedded discrete fracture model (tEDEM). The model incorporates heterogeneous hydraulic fractures, stochastic natural fractures, and coupled interflow between matrix and fracture systems, while considering reservoir stress sensitivity and gas-water two-phase flow. Four conceptual interference models are established based on fracture connectivity: matrix (Type I), natural fracture (Type II), hydraulic fracture (Type III), and hydraulic fracture-wellbore interference (Type IV). The degree of production interference (DPI) is defined as a quantitative measure. Sensitivity analysis shows that stress sensitivity and hydraulic fracture half-length significantly impact interference. An actual case study in the ZT tight gas block demonstrates intermediate interference (DPI = 0.11) due to natural fracture interactions. This study enhances the understanding of inter-well interference mechanisms, provides strategies to mitigate interference, and supports sustainable unconventional gas production.

Keywords: Tight gas reservoir; Inter-well interference; tEDFM; Complex fracture network; Field application (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:330:y:2025:i:c:s0360544225023114

DOI: 10.1016/j.energy.2025.136669

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