Petroleum Technology Digest: CT drilling takes off in Niobrara play in Colorado and Nebraska ///

Drilling shallow gas wells with a coiled tubing rig has improved performance while reducing costs, and use of this technology should grow rapidly. For more than a year, Rosewood Resources, Inc. (Rosewood), has employed a coiled tubing (CT) drilling rig to develop shallow Niobrara Chalk gas wells in Eastern Colorado/ Northwestern Kansas. Experience indicates that 3,000-ft wells can be drilled in less than a day (surface casing is set previously by another rig) while realizing significant cost savings compared to conventional drilling operations. For a subset of 25 wells, funding support from the Department of Energy’s (DOE’s) Microhole Technology Development program enabled the Gas Technology Institute (GTI) to become involved and provide extensive data collection and analysis, plus subjective observations. THE NIOBRARA PLAY Rosewood owns leases in the Niobrara Chalk play, which extends through northwestern Kansas and eastern Colorado.

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