Rigless multizone recompletion using a cement packer placed with coiled tubing: A case history
- Chevron U.S.A. Production Co. (United States)
Cement packers have been used for some time when reserve estimates have not justified the cost of major rig remedial work. They typically provide a means of zonal isolation of the last reserves in an existing wellbore. The success of these operations has historically been low. This is predominantly because of poor cement bonding in the annulus between the tubing and production casing. Because of the minimal amount of equipment on location and lack of upfront design work involved, most cement packers are doomed to failure before they are even placed. Cement packers have been placed using a large number of methods. In the Ship Shoal 181 field, Well B-4 would not economically justify a major rig workover, even though there were several uphole gas sands capable of producing in this well. With proper upfront planning and design, it would be economical; however, all these reserves could be produced in a through-tubing process using a cement packer. This case history presents a refined look at existing technology involving placement of a cement packer and reviews problems common to cement-packer completions, including a case history. Solutions are also discussed for successfully completing and recovering reserves from not one but several remaining gas intervals. This paper reviews the design considerations and precautions, along with the production results and economics, for placing what is believed to be the largest cement packer placed through coiled tubing.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 603811
- Journal Information:
- SPE Drilling and Completion, Vol. 12, Issue 4; Other Information: DN: Paper presented at the 1996 SPE Gas Technology Conference, Calgary, Alberta (CA), April 28--May 1, 1996; PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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