A critical evaluation of unconventional gas recovery from the marcellus shale, northeastern United States

摘要: The Marcellus tight gas shale represents a significant resource within the northeastern United States. It is both large reserve, with an estimated 30 to 300 TCF of recoverable gas, and close some largest prospective markets in country. However, production fraught technological obstacles, most which include prospecting, access by drilling, stimulation, recovery. Prospecting difficult because viability reservoir relies on original place ability that through pre-existing fractures may be developed stimulation. Drilling challenge since drilling costs typically comprise 50% cost wells improved horizontal longer productive zone than cheaper vertical wells. Finally, stimulation methods are necessary improve yields reduce environmental impacts consumptive water use subsequent problems safe disposal fracwater waste. We discuss challenges involved economic recovery from shales general particular.