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• W4211259404 abstract "Subsea Production Control: Beryl Field B.D. Boles B.D. Boles Hydril Co. Search for other works by this author on: This Site Google Scholar Paper presented at the European Petroleum Conference, London, United Kingdom, October 1984. Paper Number: SPE-12971-MS https://doi.org/10.2118/12971-MS Published: October 22 1984 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Boles, B.D. Subsea Production Control: Beryl Field. Paper presented at the European Petroleum Conference, London, United Kingdom, October 1984. doi: https://doi.org/10.2118/12971-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Europec featured at EAGE Conference and Exhibition Search Advanced Search AbstractThe subsea production control system installed on 3 wells in Mobil North Sea Ltd's. Beryl Field have each logged five or more full years of service. This paper describes the control system employed and reviews the operational history.IntroductionThe Beryl Field, an 80 square mile block 95 miles southeast of the Shetland Islands, was licensed in 1971 by the British government to a group of producing oil companies with Mobil North Sea Limited acting as the operator. Principal development of the field was designed around the use of a Condeep platform structure. This platform supports well drilling, production processing, oil platform supports well drilling, production processing, oil storage and tanker loading facilities. After installation of the platform in 1975, the field discovery well, 9/13-1, was completed and produced to the platform using a SEAL Intermediate System single wet tree. This well was brought on stream in mid-1976 and provided a good basis for development of future subsea wells.In 1977, Mobil initiated a program to complete three previously drilled delineation wells. Hardware selection previously drilled delineation wells. Hardware selection consisted of Cameron Iron Works completion equipment and Plain Jane subsea trees along with Hydril control systems. Two wells were completed and connected to the platform in late-1978. The third well was brought on-stream in late-1979.CONTROL SYSTEM REVIEWThe overriding characteristics in selection of the Beryl control system was 100% availability. That is, except for interruption of production because of other platform or downhole conditions, the primary objective of the control system was to available at all times. The reliability of existing control system components was enhanced by the use of both redundancy and back-up control capability. This, combined with ease of maintainability and field servicing were prime considerations in the control system chosen for the Beryl field.The surface portion of the control system consists of a dual microprocessor based master station located on the Beryl Alpha platform along with a sequence system control panel and hydraulic power unit. This equipment is utilized panel and hydraulic power unit. This equipment is utilized to control the three subsea wells. Figure 1 depicts the system block diagram including surface hardware and that required for one subsea tree.Each subsea tree includes three control pods. Two of these, redundant electrohydraulic (EH) control pods, house solenoid and hydraulically piloted valves in oil-filled, pressure balanced containers. Electronics are housed in a pressure balanced containers. Electronics are housed in a one-atmosphere enclosure located atop the hydraulic section of each pod. This pod serves as a back-up pod to the electrohydraulic pods. All pods are diver retrievable and field repairable.Control system connection to the platform is via separate electric and hydraulic umbilicals. Operation of a tree in the EH mode requires both umbilicals to be functional; however, operation in the sequenced back-up mode only requires use of the hydraulic umbilical. Loss of the hydraulic umbilical causes all control valves, EH and sequence controlled, to return to their failsafe state resulting in well shut-in.SURFACE EQUIPMENT Master StationThe dual microprocessor master station is the focal point for all control operations. Associated with the master point for all control operations. Associated with the master station is a master display panel incorporating control pushbuttons, status indicators and alarm readouts. pushbuttons, status indicators and alarm readouts. Each single microprocessor master station contains memory, processing modules, input/output modules and communication modems necessary for stand-alone control of the entire system. Them microprocessor module assembles all messages to be transmitted to the EH pods and receives all data from the pods. It establishes monitoring and command priorities, and generates and checks the transmission priorities, and generates and checks the transmission signals.p. 117 Keywords: subsea production equipment, Beryl Field, Upstream Oil & Gas, subsea system, Subsea Production Control Subjects: Offshore Facilities and Subsea Systems, Subsea production equipment This content is only available via PDF. 1984. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4211259404 date "1984-10-01" @default.
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• W4211259404 title "Subsea Production Control: Beryl Field" @default.
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