The following a sample production patten for the Corbett Creek Project. In 2015, Corbett (operated by Trident Exploration Corp and its partners) was the only sustained commercial production of coal gas from the Upper Mannville Group (Wet Coals) is in the fairway near Corbett Creek.
If one views the completion plan shown below, the concept is to effectively have no infill driling locations within the subsurface. According to Bustion (2015), the development is spaced at 3 to 4 horizontal/lateral wells miles per square mile, with laterals 1,000 and 1,500 m.
According Finn, the transition to multi-lateral well designs introduced new operational challenges and has led to more complex pumping requirements. Pumps had to overcome varying degrees of dogleg severity, operate efficiently in horizontal wellbores, be able to produce low water rates from depths greater than 3000ft, and be able to handle coal solids and fines associated with water production
References
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A.M.M. Bustin, R.M. Bustin, Total gas-in-place, gas composition and reservoir properties of coal of the, Mannville coal measures, Central Alberta, International Journal of Coal Geology 153 (2016) 127–143.
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J.R. COCKBILL, C.M. FINN, M.B. KRAWIEC, Economics of Mannville CBM Development: Drilling & Production Innovation at Corbett Creek, PAPER 2008-200. Proceedings of the Canadian International Petroleum Conference/SPE Gas Technology Symposium 2008 Joint Conference