New Technique to Recover By-passed Reserves Above Packer Reduces the Completion Cost and Maximizes the Well Production in ONWJ Field, Indonesia

Yoliandri, Susilo; Wibowo, Wahju; Rich, David; Priyandoko, P.

doi:10.2118/72145-ms

Cited by 5 publications

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“…The zones are then perforated through the cemented tubing and casing annulus and put on production. This technique (Susilo et al 2001;Idris et al 2007) provides a cost-effective solution with a quick turnaround time to complete and develop marginal reservoirs. Therefore, the cementing objective for Well BB-1 was simply to provide zonal isolation from above and below the identified production zones.…”

Section: Zonal Isolation Considerationsmentioning

confidence: 99%

Cost-Effective Recovery of Bypassed Reserves Using Rigless Cement Packer Completion Technique: Case History from Offshore Egypt

et al. 2013

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In many Brownfield developments, toward the end of a well's life cycle, the primary production zone(s) commonly waters out or depletes, or the well sits idle with no alternative means of returning back to production. At this stage, as a normal course of action, the wells are re-evaluated for potential reserves that might have been bypassed during the original completion. For zones that do not appear promising or could be marginal in terms of delivery, the recompletion costs can be prohibitive. It is in such situations that "cement packer" completions performed rigless in offshore environments provide an economic alternative to workover operations. This technique can be cost-effective and has the potential to increase the producing life of a well. This paper describes the successful application of a "cement packer" to recover bypassed reserves located above the production packer in an offshore field in the Mediterranean Sea. The technique allows zonal isolation between the various upper zones by placing cement slurry in the production tubing and casing annulus.Conceptually, it might appear simple to perform such a job, but the planning and execution must be well formulated to ensure well integrity is maintained at all times. In this case history, the challenges of executing the job were examined from many different angles (i.e., high angle well, small platform, short weather window for operations, and multiple job sequences). The average cost was only 20 to 60% of conventional workover jobs, which is a savings of up to USD 400,000. The production results have also been encouraging. These successful results have revealed opportunities for reactivating many more shut-in wells with bypassed reserves that are currently considered economically marginal. BackgroundWell BB-1 was drilled in 1997 during the exploratory drilling phase of the Petro-Said field in the Mediterranean Sea, offshore Egypt (Fig. 1). The well was completed in 2005 in the Kafr el Sheikh Anomaly-4 (An-04) level from 1710.0 to 1755.0 m with an internal casing gravel pack to help prevent formation sand production. With time, the primary production zone (An-04) depleted and watered-out, and it remained idle for further development. There were a few limited shallower zones (An-02 and M1) higher up in the wellbore, above the production packer, that appeared worth investigating. These zones were small sands with possibly low static bottomhole pressure; otherwise, scarce information was available regarding their production capability. The upper completion string consisted of a 4.5-in. chrome tubing (Fig. 2) run to surface on a 9 5/8-in. completion packer set at 1648 m. A landing nipple was available in the string at 1645 m and a subsurface safety valve at 215 m. The lower completion included a gravel-pack packer set at 1675 m and a gravel pack screen and gravel across the perforated interval at 1710 to 1755 m.The recompletion of this well using an offshore workover rig would have entailed killing the well, isolating the lower completion, pulling the upper co...

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Section: Zonal Isolation Considerationsmentioning

confidence: 99%

Cost-Effective Recovery of Bypassed Reserves Using Rigless Cement Packer Completion Technique: Case History from Offshore Egypt

et al. 2013

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Recovery of Marginal Reserves Through a Cement Packer within Two Production Packers in Dual Completion Strings

et al. 2013

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For more than a decade now cement packers have been used to access behind the pipe reserves that have been over looked due to their uneconomical viabilities during the developmental stages of the different reservoirs in a well. This technology has been used mostly to access reserves above the production packers either in a single completion or in a dual completion wells.Recently, this technology has been extended to marginal reserves found between dual production packers in dual strings completions. In some cases, it has been used to plug off existing perforations within the dual production packers and also used in accessing reserves slightly above or below the existing perforations.Equally, a new approach was adapted in keeping the tubing free of cement slurry during displacement. This new approach uses a foam wiper ball that is housed in a conventional cement head (designed solely for cement packer jobs) which launches the foam wiper ball to wipe off cement from the Christmas tree bore and production tubing during the displacement of the cement slurry. It also prevents the rigging down of the pump line from the well head connection/crossovers during the wiper ball launching. This paper describes successful cement packer recompletion jobs done on reserves found above dual production completion and those found between two dual production completion packers using the above techniques.

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Annular Packer Seal Remediation through the SS in a Dual Completion Using Coiled Tubing: Onshore Niger Delta

Atakele¹,

Anim²,

Airhis³

et al. 2018

All Days

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A dual string well in the Northern Niger Delta was diagnosed with a well integrity problem resulting from mechanical setting failure of the long string (LS) packer during initial completion. The well was designed to produce the deeper condensate reservoir through the LS and shallower black oil through the short string (SS). The packer failure created wellbore communication across the two strings, which resulted in the shutting in of the well because of a sudden increase in water cut. The communication was evident in the condensate production from both strings, suggesting production loss from the deeper condensate reservoir to the shallower black oil reservoir. A cost effective solution without recompletion was necessary to isolate the leak across the packer and eliminate the cross string communication. The initial proposal was to perform a rigless through-tubing operation that would involve setting plugs in the LS and perforating the LS to enable setting of the cement plug on the failed packer. The downside to this approach is difficulty milling the cement and plugs in the tubing after the operation, as well as the complexity of the entire operation. This paper presents a novel solution to the problem by deploying coiled tubing (CT) with optimized cement slurry through the SS. Six CT runs were made, exiting the SS 1,365 ft in each run and thereby eliminating the cost of plugs and perforation in the LS. The pump and pull method was used to spot the cement plug. The packer leak was isolated, and black oil production was established through the SS. Postoperation production proved the design a success. The procedure was implemented resulting in more than a 60% increase in production from both strings, and water cut was reduced to less than 1%. A cost reduction of more than 90% was realized compared to a workover option.

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New Technique to Recover By-passed Reserves Above Packer Reduces the Completion Cost and Maximizes the Well Production in ONWJ Field, Indonesia

Cited by 5 publications

References 0 publications

Cost-Effective Recovery of Bypassed Reserves Using Rigless Cement Packer Completion Technique: Case History from Offshore Egypt

Cost-Effective Recovery of Bypassed Reserves Using Rigless Cement Packer Completion Technique: Case History from Offshore Egypt

Recovery of Marginal Reserves Through a Cement Packer within Two Production Packers in Dual Completion Strings

Annular Packer Seal Remediation through the SS in a Dual Completion Using Coiled Tubing: Onshore Niger Delta

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