Colorado’s oil and gas conflict flared as hundreds of people packed FirstBank Center on Tuesday night hoping to kill — or at least tame — a plan to drill 139 wells from four 8-acre pads near homes in Broomfield. Those opposed to Extraction Oil and Gas’ plan displayed a map showing one pad within 500 feet of a drinking-water reservoir and pointed to a recent Anadarko Petroleum blowout that sprayed more than 11,000 gallons of oil four times that far. But Denver-based Extraction promised to use state-of-the-art practices, including underground pipelines to minimize truck traffic; $4 million in landscaping; and fracking machines so quiet that onsite workers would not need to wear ear plugs. Broomfield is considering a five-month drilling moratorium. The forum reflected discord over intensifying fossil fuel production — despite intervention by Gov.