EP0084587B1 - Procédé pour exploiter des gisements marins d'huile et/ou de gaz - Google Patents

Procédé pour exploiter des gisements marins d'huile et/ou de gaz Download PDF

Info

Publication number
EP0084587B1
EP0084587B1 EP82103350A EP82103350A EP0084587B1 EP 0084587 B1 EP0084587 B1 EP 0084587B1 EP 82103350 A EP82103350 A EP 82103350A EP 82103350 A EP82103350 A EP 82103350A EP 0084587 B1 EP0084587 B1 EP 0084587B1
Authority
EP
European Patent Office
Prior art keywords
platform
substructure
drilling
location
production
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP82103350A
Other languages
German (de)
English (en)
Other versions
EP0084587A3 (en
EP0084587A2 (fr
Inventor
Peter Christian Schiemichen
Peter Schaloske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Babcock Anlagen AG
Original Assignee
Deutsche Babcock Anlagen AG
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 Deutsche Babcock Anlagen AG filed Critical Deutsche Babcock Anlagen AG
Publication of EP0084587A2 publication Critical patent/EP0084587A2/fr
Publication of EP0084587A3 publication Critical patent/EP0084587A3/de
Application granted granted Critical
Publication of EP0084587B1 publication Critical patent/EP0084587B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto

Definitions

  • the invention relates to a method for the exploitation of marine oil and / or gas deposits by drilling holes in different locations of the occurrence and processing of the product obtained, both processes being carried out from separate platforms, and to an offshore structure, in particular for carrying out the method.
  • the cost-effectiveness of using small or recently located oil and gas fields is essentially determined by the costs for the production platform and the drilling costs. In the case of marginal fields, the solid constructions previously customary for low to medium water depths have to be written down to the relatively small amount of hydrocarbons that can be obtained. This entails high production costs.
  • the production platform is constructed in the manner of a four-legged jack-up platform that sits directly on the sea floor.
  • the legs extend from the platform to a surrounding box-shaped foundation frame, which is necessary to distribute the relatively high foundation load of this production platform.
  • the holes are drilled from specially designed jack-up platforms somewhat away from the installation site of the actual production platform.
  • a half-timbered scaffold protects the pipelines rising from the sea floor, which are led to the production platform via a pipe bridge. After the field is exhausted, the production platform can be relocated and used again, while the pipe bridge and truss cannot be easily reused.
  • Another proposal is a drilling platform that is planned in connection with a tanker as a storage and terminal.
  • the relatively low loads of such a drilling platform allow a direct foundation of the lifting legs.
  • the drilling platform is combined with a production platform into one unit.
  • this combined platform is designed as a jack-up platform, it can be reused at another location after the deposit has been exhausted, but it is not possible to separate drilling and production.
  • an offshore construction designed, for example, as a drilling or production platform is known (US Pat. No. 3,528,254), which is supported on a substructure that was previously lowered onto the seabed.
  • the substructure is firmly anchored in the subsurface.
  • the dimensions of several such substructures are matched to the offshore construction and can be lowered to the sea floor at various points and anchored there.
  • One and the same offshore construction can therefore be placed on the different substructures.
  • the offshore construction is therefore reusable, while the substructures are lost.
  • the invention has for its object to provide a method and an apparatus which are suitable for the exploitation of marine oil or gas fields and allow a short field development time.
  • This object is achieved according to the invention in that the platforms are placed one after the other on a substructure previously lowered onto the sea floor and in that the substructure lowered at a first location is picked up after leaving the platform and lowered at the next but one location for renewed pickup of one of the platforms.
  • an offshore structure consisting of a floating drilling platform and a floating production platform with lifting and lowering lifting legs, which are each supported on a substructure lowered to the sea floor, is proposed, which is characterized in that the lifting legs of the Drilling platform and the production platform have the same dimensions and the same arrangement to each other and that the respective substructure is floating and is optionally assigned to the drilling platform or the production platform.
  • foundation work on a new location can be started before drilling on another location is complete.
  • the drilling platform can be moved to the already established substructure at the new location.
  • the production platform is placed on the substructure left by the drilling platform.
  • repairs and adjustments to the platforms and the substructures can be carried out. In this way, the field development time can be significantly reduced.
  • the reuse of not only the platforms but also the substructures reduces the production costs.
  • the offshore structure shown is designed as a drilling platform 1, from which the holes to the deposit are made, and as a production platform 2, which is used to process the products obtained.
  • Each of these platforms contains a deck 3 on which the facilities necessary for the respective purpose are set up.
  • steam generators, turbines, Ge generators and, if necessary, rectifiers can be installed, with the aid of which the oil and / or gas can be converted into electricity which is transported ashore via submarine cables.
  • the decks 3 of the platforms are buoyant and equipped with lifting and lowering legs 4.
  • lifting devices are available on the deck.
  • the deck 3 and the lifting legs 4 of the drilling platform 1 and the production platform 2 are largely the same.
  • the lifting legs 4 have the same dimensions and the same arrangement with respect to the deck 3.
  • the lifting legs 4 of the platforms are supported on a substructure 5 which has previously been lowered onto the seabed 6.
  • the substructure 5 is buoyant due to the arrangement of bilge and floodable tanks. It can also be provided with storage tanks for the extracted oil.
  • the substructure 5, like the drilling platform 1 and the production platform 2, is fully assembled at a shipyard. These units are towed to the intended construction site on the sea and lowered there.
  • the substructure 5 consists of feet 7 and vertical sections 8, which are connected to one another by struts 9.
  • the lower ends of the lifting legs 4 rest on the vertical sections 8 of the substructure 5.
  • the mutual spacing of the lifting legs 4 corresponds to the spacing of the vertical sections 8 from one another.
  • Each substructure 5 can thus be assigned either a drilling platform 1 or a production platform 2.
  • the vertical sections 8 of the substructure 5 can be extended and connected by a truss structure 10.
  • the distance of the vertical sections 8 from the water surface indicated by the line 11 is essentially the same.
  • the lifting legs 4 of the drilling platform 1 and the production platform 2 can always have a constant short length. This means a comparatively economical dimensioning of the relatively expensive lifting legs 4 and a small space requirement for the leg diameter which is small given the short leg lengths.
  • a substructure 5 is placed and installed on the seabed 6 at location A by flooding the tanks.
  • a drilling platform 1 is initially placed by floating this drilling platform 1 over the substructure 5, lowering the lifting legs 4 until they strike the substructure 5, and the deck 3 when the lifting legs 4 are firmly seated, up to the desired height above the water surface is raised.
  • the required production wells are drilled from the drilling platform 1.
  • a second substructure 5 is to be installed on location B while the production wells are being sunk.
  • appropriate structural preparations for extending and adapting the substructures 5 initially installed at location A to the water depth and the ground conditions of location C are to be carried out.
  • phase II and the subsequent phase 111 a short time is provided for general overhauls of the production platform 2 and the drilling platform 1 and for adaptation work on the resumed substructure 5 from location A.
  • This substructure 5 is then placed on location C, while the production platform 2 is placed on the substructure 5 left by the drilling platform 1 at location B.
  • drilling operations can be started from the attached drilling platform 1 at this new location C.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Claims (2)

1. Procédé pour l'exploitation des gisements de pétrole et/ou de gaz naturel situés au large des côtes par exécution de forages en différents points sélectionnés du gisement et pour le traitement du produit d'extraction, ces deux opérations étant réalisées par des plate-formes distinctes, caractérisé par le fait que les plate-formes sont mises en place les unes après les autres sur un soubassement préalablement descendu sur le fond marin et que le soubassement descendu au premier point sélectionnée du gisement est, une fois la plate-forme enlevée, relevé puis descendu au point de sélection placé immédiatement après le point de sélection suivant pour y recevoir à nouveau l'une des plate-formes.
2. Ouvrage offshore, comportant une plate-forme de forage (1) capable de flotter et une plate-forme de production (2) également capable de flotter, ces plates-formes étant équipées de colonnes d'appui (4) pouvant s'abaisser et se relever, destinées à prendre appui sur un soubassement (5) descendu sur le fond marin (6), en particulier pour la mise en oeuvre du procédé conforme à la revendication 1, caractérisé par le fait que les colonnes d'appui (4) de la plate-forme de forage (1) et de la plate-forme de production (2) présentent les mêmes dimensions et la même disposition réciproque et que chaque soubassement (5) peut flotter et recevoir au choix la plate-forme de forage (1) ou la plate-forme de production (2).
EP82103350A 1982-01-27 1982-04-21 Procédé pour exploiter des gisements marins d'huile et/ou de gaz Expired EP0084587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823202605 DE3202605A1 (de) 1982-01-27 1982-01-27 Verfahren zum ausbeuten von marinen oel- und/oder gasvorkommen
DE3202605 1982-01-27

Publications (3)

Publication Number Publication Date
EP0084587A2 EP0084587A2 (fr) 1983-08-03
EP0084587A3 EP0084587A3 (en) 1985-01-23
EP0084587B1 true EP0084587B1 (fr) 1986-12-10

Family

ID=6154047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103350A Expired EP0084587B1 (fr) 1982-01-27 1982-04-21 Procédé pour exploiter des gisements marins d'huile et/ou de gaz

Country Status (3)

Country Link
EP (1) EP0084587B1 (fr)
DE (2) DE3202605A1 (fr)
DK (1) DK305082A (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924947A (en) * 1955-01-07 1960-02-16 Peterson Ole Caisson
US3524322A (en) * 1968-06-27 1970-08-18 Texaco Inc Splay footed platform anchor
DE2736937C3 (de) * 1977-08-16 1981-04-16 Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel Verfahren zum Bau eines Offshore-Bauwerkes
WO1981003191A1 (fr) * 1980-05-02 1981-11-12 Global Marine Inc Plate-forme offshore

Also Published As

Publication number Publication date
DE3274665D1 (en) 1987-01-22
EP0084587A3 (en) 1985-01-23
EP0084587A2 (fr) 1983-08-03
DK305082A (da) 1983-07-28
DE3202605A1 (de) 1983-08-04

Similar Documents

Publication Publication Date Title
DE60126984T2 (de) Verfahren und vorrichtung zur anordnung mindestens einer windturbine an offenem wasser
DE69738573T2 (de) Bohrshiff oder halbeintauchbare Bohrinsel und Bohranordnung für vielfältige Operationen
DE3605161C2 (fr)
DE2452560C2 (de) Verfahren zum Überführen einer Arbeitsplattform aus der schwimmenden Lage in eine aus dem Wasser herausgehobene Lage und Arbeitsplattform zur Ausführung des Verfahrens
DE60316279T2 (de) Verfahren und wasserfahrzeug zur manipulation einer offshore-anlage
DE2913570A1 (de) Offshore-plattformaufbau
DE19727330A1 (de) Schwimmfähige Offshore-Windenergieanlage
DE3751457T2 (de) Verfahren zur Einrichtung eines Meeresbauwerks.
DE2838281A1 (de) Meeresbodenschablone
DE2416357A1 (de) Verfahren und vorrichtung zum umwandeln eines schwimmponton in ein halb-tauchfaehiges schwimmfahrzeug, insbesondere eine schwimmende arbeitsinsel
DE2939982C2 (de) Verfahren zum Errichten eines Elektrizitätswerks
DE1956328A1 (de) In einiger Entfernung von der Kueste versenkbare Vorrichtung zur Gewinnung und Lagerung von OEl
DE2334468A1 (de) Verfahren zur herstellung grosser schwimmender einheiten
DE2606297A1 (de) Verfahren zum errichten einer werksanlage an land
EP2623674A1 (fr) Infrastructure pour une plateforme offshore et procédé d'installation d'une telle infrastructure
DE69119852T2 (de) Meeresbauwerk
DE2457536B2 (de) Verfahren zum transport und zum absetzen einer offshore-plattform auf der meeressohle sowie offshore-plattform
DE2532775A1 (de) Schwimmfaehiges fundament in form eines flosses sowie verfahren zu seiner herstellung und vereinigung mit einer turmkonstruktion
DE2005960A1 (de) Anlage einer Gruppe von Unterwasser-Bohrlöchern
EP0084587B1 (fr) Procédé pour exploiter des gisements marins d'huile et/ou de gaz
DE2605392A1 (de) Hochsee- bohr- und -foerderinsel
EP3530814B1 (fr) Procédé de mise en place d'un poste électrique et kit de fondation pour un poste électrique
DE2634622C2 (de) Schwimmende Plattform mit Schwimmkörpern aus Stahlbeton
EP1321669B1 (fr) Système de transport et d'installation d'éoliennes marines
DE2323135A1 (de) Verfahren zum errichten eines turmes od. dgl. auf dem meeresboden

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19850226

17Q First examination report despatched

Effective date: 19860219

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

REF Corresponds to:

Ref document number: 3274665

Country of ref document: DE

Date of ref document: 19870122

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890323

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890331

Year of fee payment: 8

Ref country code: DE

Payment date: 19890331

Year of fee payment: 8

Ref country code: BE

Payment date: 19890331

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890430

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19900430

BERE Be: lapsed

Owner name: DEUTSCHE BABCOCK ANLAGEN A.G.

Effective date: 19900430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19901101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19901228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST