Expandable Completion Liners: A Comparison Of Performance With Other Completion Types In The Reg and Teguentour Fields, Algeria.
- David L. Mason (BP) | Farouk Benaichaoui (Sonatrach) | Huw John | Mark Okwelegbe (BP) | Terje Moum (Statoil) | Tom Harneshaug (Statoil) | Quentin Morgan (Weatherford International) | Colin Jones (Weatherford International) | Juergen Neumann (Weatherford International)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- June 2011
- Document Type
- Journal Paper
- 255 - 267
- 2011. Society of Petroleum Engineers
- 5.1 Reservoir Characterisation
- Expandable Completion Liners
- 2 in the last 30 days
- 685 since 2007
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Four expandable completion liners (ECLs) have been run in Algeria in two fields--these are the first fully compliant ECLs in Algeria, the first worldwide in gas wells, and the first worldwide in multilateral wells (from Weatherford database). This paper presents the first detailed benchmark study of ECL performance.
All systems to date have been run in 8 1/2-in. hole using 5 1/2-in. base-pipe ECL compliantly expanded, and the installations went well. It has been possible to compare ECL performance data against a comprehensive surveillance data set for the two fields where data from existing openhole completions allow meaningful comparisons. The other completions consist largely of slotted liners and some barefoot completions. The tested production rates in each of the wells have been high relative to normal field trends; however, the predominant factor in this is the reservoir character. Pressure-buildup (PBU) analysis indicates that the second well has reduced Darcy skin, while it is considered unproved in the first well (more data over time are needed). There is, however, consistent evidence for a reduction in the rate-dependent proportion of total skin in both wells. This is supported by other studies and a consideration of basic principles.
The reduction in the rate-dependent proportion of skin has given an increase in production rate of 5-20% as compared with the computed rate from a slotted liner. This difference assumes no borehole collapse, with analyses and discussion presented of the effect on well performance should borehole collapse occur.
The joint venture (JV) is investigating the further use of this technology in smaller hole sizes and possibly in conjunction with fracture stimulation.
|File Size||1 MB||Number of Pages||13|
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