Interference mechanism in coalbed methane wells and impacts on infill adjustment for existing well patterns
نویسندگان
چکیده
Inter-well interference, a superimposed effect of pressure propagation from adjacent wells, can enhance the dynamics methane desorption in pores and gas transport fractures through energy migration. To better understand variation pattern seepage efficiency, inter-well interference mechanism different types reservoirs productivity changes after infilling coalbed wells were investigated. The results showed that average old increased by 627 m3/d horizontal well high-permeability without surrounding rock water supply (HP-WW); however, newly infilled produced at 4996 m3/d. infill HP-WW reservoir resulted 11％-39％permeability increment compared with initial permeability (the 1.58 to 2.18 mD). While, much higher was observed (varies 29％-50％) relative low formation due well. After confining increases effective stress, which is smaller than positive formed fracture expansion increase diffusion area. Additionally, promotes coupled superposition drop funnel, effectively suppresses influence induced velocity sensitivity, lock, resulting an difference between wellbore. This enhances pore surface migration fracture. For diffusion, mean free path molecules decreases implying main resistance collisions wall among molecules. Therefore, findings this study help for understanding response efficient CBM production.
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ژورنال
عنوان ژورنال: Energy Reports
سال: 2022
ISSN: ['2352-4847']
DOI: https://doi.org/10.1016/j.egyr.2022.06.070