Innovative ESP Completions For Liverpool Bay Development
- D.R. Stewart (BHP Petroleum Ltd.) | B. Holland (BHP Petroleum Ltd.)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- December 1997
- Document Type
- Journal Paper
- 219 - 223
- 1997. Society of Petroleum Engineers
- 3.1 Artificial Lift Systems, 3 Production and Well Operations, 2 Well Completion, 1.6 Drilling Operations, 4.1.2 Separation and Treating, 4.5 Offshore Facilities and Subsea Systems, 2.2.2 Perforating, 5.6.4 Drillstem/Well Testing, 3.1.2 Electric Submersible Pumps, 1.7 Pressure Management, 4.2.5 Offshore Pipelines, 4.2 Pipelines, Flowlines and Risers, 4.1.5 Processing Equipment, 1.8 Formation Damage, 6.1.5 Human Resources, Competence and Training, 4.2.3 Materials and Corrosion, 5.2.1 Phase Behavior and PVT Measurements, 7.1.10 Field Economic Analysis, 7.1.9 Project Economic Analysis, 1.10 Drilling Equipment, 1.7.5 Well Control
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This paper presents a review of the ESP completions installed in the Douglas Field in Liverpool Bay. A number of innovations were successfully introduced into the completion design, these are discussed along with the completion procedures and the excellent operational performance which was achieved. ESP runlife performance and the steps taken to maximize runlives are also discussed.
The Douglas Oil Field, part of the Liverpool Bay Development, off the west coast of the United Kingdom, requires artificial lift to achieve economic production rates. Low reservoir temperature and a low GOR make Douglas an ideal application for electrical submersible pumps, ESP's and all producers will be completed with an ESP.
In a field dependent on ESP's, runlives and workover costs play a critical part in project economics. On Douglas, a number of steps have been taken to maximise runlives and minimise completion and workover costs. The completions have been designed to be reliable and quick to install without compromising productivity.
A number of innovations have been introduced into the completion design to help achieve these objectives and the operational performance on the original completion campaign was very good.
The ESP system has been designed to maximise runlife, with the selection of fit-for-purpose, cost-effective equipment. Systems have been put in place to ensure comprehensive monitoring of the operation of the ESP's, further increasing the probability of long runlives.
Oil production started in January 1996; by the end of June 1996 when the paper was written, all ESP's were still operating despite having been subjected to a high number of starts.
Liverpool Bay Development
Development Overview. The Liverpool Bay Development comprises four fields in two separate license blocks. The Hamilton and Hamilton North gas fields and the Douglas oil field are located 15 miles off the North coast of Wales in Block 110/13 and the Lennox oil and gas field is located 5 miles off the West coast of England in block 110/15. BHP operates the development on behalf of a partnership including Lasmo, Monument and Powergen.
Figure 1 shows an overview of the development which includes a total of six platforms offshore. On Douglas there are three bridge linked structures; an Accommodation platform, a process platform and a wellhead platform. Smaller unmanned platforms on Lennox, Hamilton and Hamilton North pump oil and gas to the Douglas complex via subsea pipelines. The oil is exported via an offshore storage barge and shuttle tankers. The gas is exported via a pipeline to an onshore terminal in North Wales.
Plateau production rates from the development are expected to be around 75,000 barrels per day of oil and around 200 mmscf/day of gas.
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