Research Papers: Petroleum Wells-Drilling/Production/Construction

Microhole Coiled Tubing Drilling: A Low Cost Reservoir Access Technology

[+] Author and Article Information
Kent Perry

 Gas Technology Institute, 1700 South Mount Prospect Road, Des Plaines, IL 60018-1804

J. Energy Resour. Technol 131(1), 013104 (Feb 06, 2009) (9 pages) doi:10.1115/1.3000100 History: Received February 01, 2008; Revised August 26, 2008; Published February 06, 2009

Although the microhole coiled tubing drilling rigs have been used extensively in Canada, their application in the U.S. has been very limited. In an effort to introduce this technology to the U.S. operators, GTI, with the support of DOE∕NETL, has completed a successful field testing of the coiled tubing microhole drilling technology. In this paper we report results of field testing of the system in 25 wells drilled in the Niobrara unconventional gas play of Kansas and Colorado. The objective of the field test was to measure and document the rig performance under actual drilling conditions. In these tests, a coiled tubing drilling rig (designed and built by T Gipson with Advanced Drilling Technologies Inc.) was utilized. The rig operations have continued to improve to the point where it now drills a 3100ft well in a single day. Well cost savings of approximately 30% over conventional rotary well drilling have been documented. A description of the rig and a summary of its performance in the Niobrara unconventional gas play are included. In addition, an estimate of economic advantages of widespread application of microhole drilling technology in the lower 48 states is presented.

Copyright © 2009 by American Society of Mechanical Engineers
Topics: Drilling , Tubing
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Figure 1

Coiled tubing rig used in Kansas

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Figure 2

CT microhole rig in operation

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Figure 3

Distribution of rig time for a typical Niobrara well

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Figure 4

Historical well completions by depth category

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Figure 5

Projection of U.S. onshore drilling

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Figure 6

Projection of U.S. onshore drilling expenditure

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Figure 7

Estimated annual savings from application of CT microhole drilling

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Figure 8

Nuclear Production Stimulation

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Figure 9

Massive Hydraulic Fracturing

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Figure 10

Complete Reservoir Access by Microhole Drilling



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