@Article{fdmp.2025.065151,
AUTHOR = {Cuiping Yuan, Sicun Zhong, Yijia Wu, Man Chen, Ying Wang, Yinping Cao, Jia Chen},
TITLE = {Evaluation of Estimated Ultimate Recovery for Shale Gas Infill Wells Considering Inter-Well Crossflow Dynamics},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {7},
PAGES = {1689--1710},
URL = {http://www.techscience.com/fdmp/v21n7/63256},
ISSN = {1555-2578},
ABSTRACT = {Field development practices in many shale gas regions (e.g., the Changning region) have revealed a persistent issue of suboptimal reserve utilization, particularly in areas where the effective drainage width of production wells is less than half the inter-well spacing (typically 400–500 m). To address this, infill drilling has become a widely adopted and effective strategy for enhancing reservoir contact and mobilizing previously untapped reserves. However, this approach has introduced significant inter-well interference, complicating production dynamics and performance evaluation. The two primary challenges hindering efficient deployment of infill wells are: (1) the quantitative assessment of hydraulic and pressure connectivity between infill wells and their associated parent wells, and (2) the accurate estimation of platform-scale Estimated Ultimate Recovery (EUR) following infill implementation. This study presents a novel framework to quantify inter-well connectivity by deriving a material balance equation tailored for shale gas infill well groups, explicitly incorporating gas adsorption and desorption mechanisms. The model simultaneously evaluates formation pressure evolution and crossflow behavior between wells, offering a robust analytical basis for performance prediction. For infill wells intersecting the drainage boundaries of parent wells, EUR is estimated using an analytical model developed for multi-stage hydraulically fractured horizontal wells. Meanwhile, the EUR of the parent wells is obtained by summing their pre-infill EUR with the final inter-well crossflow contribution.},
DOI = {10.32604/fdmp.2025.065151}
}