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 PDFInfo
- 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
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)
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)
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 |
-
1982
- 1982-01-27 DE DE19823202605 patent/DE3202605A1/de not_active Withdrawn
- 1982-04-21 EP EP82103350A patent/EP0084587B1/fr not_active Expired
- 1982-04-21 DE DE8282103350T patent/DE3274665D1/de not_active Expired
- 1982-07-07 DK DK305082A patent/DK305082A/da not_active Application Discontinuation
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 |