WO2010014770A1 - Procédé et système pour traitement sous-marin d'effluents de puits à phases multiples - Google Patents

Procédé et système pour traitement sous-marin d'effluents de puits à phases multiples Download PDF

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Publication number
WO2010014770A1
WO2010014770A1 PCT/US2009/052186 US2009052186W WO2010014770A1 WO 2010014770 A1 WO2010014770 A1 WO 2010014770A1 US 2009052186 W US2009052186 W US 2009052186W WO 2010014770 A1 WO2010014770 A1 WO 2010014770A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
liquid
separation vessel
fluid
gas
Prior art date
Application number
PCT/US2009/052186
Other languages
English (en)
Inventor
Svein Audun HÅHEIM
Original Assignee
Shell Oil Company
Shell Internationale Research Maatschappij B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Oil Company, Shell Internationale Research Maatschappij B.V. filed Critical Shell Oil Company
Priority to AU2009276524A priority Critical patent/AU2009276524B2/en
Priority to CN2009801292822A priority patent/CN102105651A/zh
Priority to GB1101265A priority patent/GB2475184B/en
Priority to BRPI0916521A priority patent/BRPI0916521A2/pt
Priority to US13/056,905 priority patent/US20110155385A1/en
Publication of WO2010014770A1 publication Critical patent/WO2010014770A1/fr
Priority to NO20110309A priority patent/NO20110309A1/no

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/36—Underwater separating arrangements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations

Definitions

  • the invention relates to a method and system for subsea processing of multiphase well effluents.
  • US patent 7,210,530 discloses a fluid delivery system comprising a vertical liquid/vapor separator and riser assembly that comprises a multiphase separator inlet, a vapor outlet and riser, and a liquid outlet port connected to a hydraulically-driven centrifugal pump.
  • the vertical separator is capable of low pressure operation and large variations in controlled liquid levels within the separator, allowing the relatively slow reaction time pump to control the liquid level from low pressure wells penetrating low pressure reservoirs.
  • a hydraulic pump combined with a differential pressure transducer to control the flowrate of the liquid flowing through the liquid flowline;
  • FIG.1 is a schematic view of a subsea processing system according to the invention. Detailed Description of the Invention:
  • a liquid level transmitter measures the liquid level in the separation vessel and transmits the level signal to a controller, which adjusts the pump speed setpoint in a cascade arrangement to maintain the liquid level at a predetermined setpoint.
  • the level controller is tuned to provide extremely fast action for handling level disturbances caused by changes in the liquid feed rate, such that the pump speed setpoint is almost instantly adjusted to respond to changes in liquid level.
  • the level controller also provides stable pump speed when the liquid feed rate is stable.
  • the fast acting variable speed drive receives its speed setpoint from the level controller and increases or decreases the pump speed within 2 seconds, being limited only by the physical capabilities of the particular variable speed drive.
  • This fast acting level controller enables the use of compact separation systems as the liquid interface level can now be maintained within a small boundary.
  • the pump is a gas tolerant or multiphase pump, to ensure occasional separator drainage or gas surge can be tolerated when severe liquid feed disturbances occur which may require a faster pump speed response than is physically possible with the variable speed drive.
  • the flowline for transferring the gas enriched fluid fraction is connected at or near the top of the separation vessel and the flowline for transferring the liquid enriched fluid fraction is connected at or near the bottom of the gravity separation vessel, that the flowline for transferring the gas enriched fluid fraction is equipped with a liquid overflow valve, which is closed if liquid enters the valve, the separation vessel and liquid valve overflow valve are arranged in a separator module which is rethevably mounted on a pump station base at the seabed and - the pump and the electric pump motor are mounted in a pump module, which is rethevably mounted on the pump station base.
  • an inlet of a fluid recirculation conduit may be connected to the liquid enriched fluid transportation conduit at a location downstream of the pump and an outlet of the fluid recirculation conduit is connected to the multiphase well effluent transportation conduit, which conduit is equipped with a valve, which is opened during start up of the pump and which is subsequently closed.
  • a system for subsea processing multiphase well effluents comprising natural gas and liquid from an underwater hydrocarbon containing formation, the system comprising:
  • liquid level transmitter assembly for monitoring the gas liquid interface in the fluid separation vessel
  • liquid level controller which receives the signal from the level transmitter and generates a pump speed setpoint for controlling the liquid level to a predetermined setpoint
  • FIG.1 shows a subsea processing system 1 according to the invention comprising a separation module 2 and a pump module 3 that are rethevably mounted on a base 4, which is mounted on the seabed 5.
  • the separation module 2 comprises a gas-liquid separation vessel 6, which is connected to a multiphase well effluent flowline 7, which is connected via a manifold 8 to a pair of subsea gas wells 9 and 10 which produce a multiphase flow mixture of natural gas, water, condensates and optionally crude oil from an underwater gas reservoir (not shown).
  • the gas- liquid separation vessel 6 is provided with an upper outlet 1 1 for discharging a gas enriched fluid fraction into a gas transportation conduit 12 and with a lower outlet 13 for discharging a liquid enriched fluid fraction into a liquid transportation conduit 14.
  • the gas and liquid transportation conduits 12 and 14 comprise vertical riser sections 12A, 14A, which are suspended below a floating platform 15, which floats at the water surface 16.
  • the pump module 3 comprises a gas tolerant liquid pump 17, which is driven by an electric motor 18 that is powered via an electrical cable 19 by an electric power source 20 at the platform 15.
  • the electric motor 18 is equipped with a fast acting variable speed drive system, which is coupled, as indicated by dashed line 24, to an assembly of two liquid level transmitters 21 and 22 and a level controller which monitor the liquid level 23 in the separation vessel 6.
  • the level controller provides the speed setpoint to the fast acting variable speed drive system.
  • the level controller will increase the speed of the motor and pump assembly 17,18 within 1 to 2 seconds if the liquid level increases above its setpoint 21 and the level controller will decrease the speed of the motor and pump assembly 17,18 within 1 to 2 seconds if the liquid level 23 drops below the predetermined liquid level controller setpoint 21.
  • a liquid overflow valve 25 is arranged in the gas transportation conduit 12 in the vicinity of the upper gas outlet 1 1 , which valve automatically closes itself if a liquid surge enters the valve.
  • a fraction of the liquid discharged from the lower liquid outlet 13 is circulated back to the multiphase well effluent flowline 7 through a liquid recycling conduit 26, which is equipped with a valve 27, which is opened during the pump start up phase and which is subsequently gradually closed.
  • the valve 27 may comprise a conventional subsea choke and an on-off valve, which does not need to be fast acting as failure to control the recycle flow rate will not have a detrimental effect on the multiphase pump 17.
  • valves 25 and 27 may be simple on off valves, which do not require a complex dynamic control of the valve openings and that the electric motor 18 is the only subsea component which is dynamically controlled by a fast acting variable speed drive system which receives its speed setpoint from a level controller.
  • the modular construction of the system 1 allows replacement, inspection and/or repair of the retrievable pump and separator modules 3 and 2 by disconnecting the stab-in pipe joints 30 and the subsea power cable connector 31 and then lifting the pump and/or separator module 3,2 to a vessel at the water surface 16 for replacement inspection and/or repair.
  • processing system 1 may be installed at the bottom 5 of an ocean, sea, lake and/or river and that the term "subsea" as used in this specification and the accompanying claims should be interpreted extensively so that it embraces all these options.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un procédé et sur un système pour le traitement sous-marin d'effluents de puits à phases multiples comprenant du gaz naturel et un liquide venant d'une formation contenant des hydrocarbures sous-marines. Ledit système (1) comprend : une cuve de séparation de fluide (6) qui est reliée à une extrémité aval d'un conduit de transport d'effluent de puits à phases multiples (7) ; un ensemble de transmission de niveau de liquide (21, 22) pour contrôler l'interface gaz/liquide (23) dans la cuve de séparation de fluide (6) ; une conduite d'écoulement de transport de fluide enrichi en liquide (14) reliée au fond (13) de la cuve de séparation de liquide (6) ou au voisinage de celui-ci et une conduite d'écoulement de transport de fluide enrichi en gaz (12) reliée au sommet (11) de la cuve de séparation de fluide (6) ou au voisinage de celui-ci ; une pompe (17) reliée à un moteur électrique (18) ; et un système d'entraînement à vitesse variable à action rapide, qui est couplé au dispositif de commande de niveau de liquide qui règle le point de consigne de vitesse de moteur et de pompe en 2 secondes afin de maintenir le niveau de liquide dans la cuve à un point de consigne prédéterminé.
PCT/US2009/052186 2008-07-31 2009-07-30 Procédé et système pour traitement sous-marin d'effluents de puits à phases multiples WO2010014770A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2009276524A AU2009276524B2 (en) 2008-07-31 2009-07-30 Method and system for subsea processing of multiphase well effluents
CN2009801292822A CN102105651A (zh) 2008-07-31 2009-07-30 用于多相井流出物的海底处理的方法和系统
GB1101265A GB2475184B (en) 2008-07-31 2009-07-30 Method and system for subsea processing of multiphase well effluents
BRPI0916521A BRPI0916521A2 (pt) 2008-07-31 2009-07-30 método e sistema para processamento submarino de efluentes de poço de multifases
US13/056,905 US20110155385A1 (en) 2008-07-31 2009-07-30 Method and system for subsea processing of multiphase well effluents
NO20110309A NO20110309A1 (no) 2008-07-31 2011-02-25 Fremgangsmate og system for undervannsbehandling av flerfasebronnavlopsvannsportkanaler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08161579A EP2149673A1 (fr) 2008-07-31 2008-07-31 Procédé et système pour le traitement sous-marin d'effluents de puits à phases multiples
EP08161579.1 2008-07-31

Publications (1)

Publication Number Publication Date
WO2010014770A1 true WO2010014770A1 (fr) 2010-02-04

Family

ID=40723220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/052186 WO2010014770A1 (fr) 2008-07-31 2009-07-30 Procédé et système pour traitement sous-marin d'effluents de puits à phases multiples

Country Status (8)

Country Link
US (1) US20110155385A1 (fr)
EP (1) EP2149673A1 (fr)
CN (1) CN102105651A (fr)
AU (1) AU2009276524B2 (fr)
BR (1) BRPI0916521A2 (fr)
GB (1) GB2475184B (fr)
NO (1) NO20110309A1 (fr)
WO (1) WO2010014770A1 (fr)

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CN107532470B (zh) * 2015-04-01 2019-10-18 沙特阿拉伯石油公司 用于油气应用的流体驱动混合系统
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CN106401539B (zh) * 2016-10-24 2019-03-01 中海石油(中国)有限公司 具有清管球自动发射功能的水下管汇装置
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CN107727553B (zh) * 2017-10-31 2023-09-29 中国石油大学(北京) 一种稠油启动压力梯度以及渗流规律测量装置与方法
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Also Published As

Publication number Publication date
BRPI0916521A2 (pt) 2015-11-10
GB2475184B (en) 2011-10-19
EP2149673A1 (fr) 2010-02-03
GB2475184A (en) 2011-05-11
NO20110309A1 (no) 2011-04-19
CN102105651A (zh) 2011-06-22
US20110155385A1 (en) 2011-06-30
AU2009276524A1 (en) 2010-02-04
AU2009276524B2 (en) 2013-02-28
GB201101265D0 (en) 2011-03-09

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