CN105003232A - Ultra-deep marine oil and gas dry type production system, installing method of ultra-deep marine oil and gas dry type production system and evacuating method of ultra-deep marine oil and gas dry type production system - Google Patents
Ultra-deep marine oil and gas dry type production system, installing method of ultra-deep marine oil and gas dry type production system and evacuating method of ultra-deep marine oil and gas dry type production system Download PDFInfo
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Abstract
The invention discloses an ultra-deep marine oil and gas dry type production system, an installing method of the ultra-deep marine oil and gas dry type production system and an evacuating method of the ultra-deep marine oil and gas dry type production system. The system comprises a movable oil production platform, dry type production equipment, an in-water platform, rigid vertical pipe systems, a tension mooring system and an in-water wellhead system, wherein the rigid vertical pipe systems comprise a lower part rigid vertical pipe system and an upper part rigid vertical pipe system. An ultra-deep marine production platform is designed into the movable oil production platform and the in-water platform. The in-water platform bears the weight of the lower part rigid vertical pipe system, so that the complicated requirements of production vertical pipes on the movable oil production platform are reduced. The movable oil production platform realizes the expansion application of a shallow marine movable soil production platform to an ultra-deep marine region. Compared with the existing ultra-deep marine oil production platform, the oil production platform provided by the invention has the advantages that the structure form is simple, and the building cost is reduced. The movable oil production platform is arranged on the in-water platform, so that a complicated mooring positioning system required by the existing ultra-deep marine oil production platform in the use process is avoided.
Description
Technical field
The present invention relates to a kind of offshore and gas development technology, particularly a kind of marine oil and gas dry type production system for working under super abyssal environment and install evacuation method.
Background technology
The petroleum resources at the South Sea is very abundant, and the oil and gas development of China to ultra-deep sea area, the South Sea (depth of water is greater than 1500 meters) is still in the starting stage.
At present, Chinese patent (patent No.: ZL201110441883.6) discloses a kind of novel ultra-deep-water oil gas field Engineering Develop System for MSC, this system supports oil production equipment in floating drum and water primarily of single standpipe and forms, by adopting shallow water (within 300 meters of depth of waters) submerged production equipment to be arranged on the subduction floating drum of tension force mooring, realize ultra-deep-water oil-gas field development.There are the following problems for this system:
The first, the cost due to the subsea production system that this system still adopts, therefore install, use, safeguarded is very high;
The second, due to this system subduction floating drum Texas deck limited space, therefore these subsea production systems cannot on floating drum rational layout.
Chinese patent (patent No.: ZL 2013204961047) discloses " a kind of ultra-deep-water oil and gas development system based on dry type tree ", this system mainly contains dry type tree and underwater well head cabin composition, dry type tree and relevant device are arranged in underwater well head cabin, and underwater well head cabin to be arranged in water on well head.There are the following problems for this system:
The first, because this system is positioned on the underwater platform at 100 ~ 400 meters of under water, therefore underwater well head cabin needs to bear huge hydrostatic pressure;
The second, underwater well head cabin volume is comparatively large, and each underwater completion device needs a underwater well head cabin, is therefore unfavorable for arranging on underwater platform;
3rd, the instrument that this system uses is various, complex structure, cost are high.
Existing dry type oil and gas development equipment has the advantage that well workover is convenient, running cost is low, downtime is short and flowing safety is good.But because South Sea ultra-deep sea environment condition is very severe, apply current conventional dry oil and gas development equipment and also there is following problem:
The first, in current production reality, available dry type oil and gas development equipment is only confined to tension leg platform (TLP) and open side type platform;
The second, the designing requirement that the disastrous Marine Environmental Elements in ultra-deep sea is equipped dry type oil and gas development is high;
3rd, by the restriction that ultra-deep seawater is dark, TLP mooring system is with high costs, has become the key constraints that it strides forward to ultra-deep-water.Open side type platform construction difficulty is large, and vortex-induced vibration is obvious, and anti-fatigue performance is poor.
4th, under the ambient conditions of ultra-deep sea, the installation of tension leg platform (TLP), open side type platform and withdraw program complexity.
Based on above problem, the feasibility using dry type oil and gas development to equip under above-mentioned patent and traditional marine oil and gas production system all cannot meet super abyssal environment and the requirement of economic serviceability.
Summary of the invention
For solving the problems referred to above existed under existing dry type oil and gas development is equipped in super abyssal environment, the present invention will design a kind of ultra-deep sea marine oil and gas dry type production system and the installation evacuation method thereof that can realize following object:
Mobile shallow water production platform can be realized in the marine expanded application of ultra-deep;
The designing requirement using dry type to produce equipment ultra-deep sea mobile production platform can be reduced;
Can structure be simplified, reduce design, construction, installation and maintenance cost;
To achieve these goals, technical scheme of the present invention is as follows: a kind of ultra-deep sea marine oil and gas dry type production system, comprises mobile production platform, dry type produces well head system in equipment, underwater platform, rigid riser system, tension force anchoring system and water.
Described rigid riser system, comprises lower rigid riser systems and top rigid riser system.Lower rigid riser systems by production of hydrocarbons passage by well head system in subsea wellheads system tieback to water, top rigid riser system by production of hydrocarbons passage by well head system tieback in water to the dry type well head system of mobile production platform.
Described mobile production platform, producing equipment and top rigid riser system for supporting dry type, being fixed on underwater platform by transferring four cylindrical legs.
Described dry type produces equipment, is positioned at more than sea level, is supported by mobile production platform.
Described underwater platform, is positioned at b.s.l. 50 ~ 200 meters of, for supporting well head system and lower rigid riser systems in water, providing support basis simultaneously, be fixed on sea bed by tension force anchoring system for portable production platform.
Described tension force anchoring system, comprises flexible coupling, tension force mooring line and suction anchor.Tension force mooring line top connects underwater platform by flexible coupling, bottom connect suction anchor, by suction anchor by underwater platform mooring at sea bed.
A mounting method for ultra-deep sea marine oil and gas dry type production system, comprises the following steps:
A, to arrive before target marine site at mobile production platform, first, pre-installation underwater platform, by underwater platform by the mooring of tension force anchoring system on sea bed; Then, adopt lower rigid riser systems by well head system in subsea wellheads system tieback to the water of underwater platform; Finally, adjustment tension force anchoring system, completes the work location of underwater platform.
B, by mobile production platform towage to target marine site, transfer four cylindrical legs to from the place of underwater platform upper deck 3-5 rice, time-out is transferred.Then tugboat auxiliary under determine that well location and spud can slot are put, complete in place.
C, the spraying system adopting mobile production platform spud leg to carry rinse the spud can groove of cleaning underwater platform, under the wind, unrestrained very little working window of correspondence, are synchronously transferred in the spud can groove of underwater platform by whole spud leg rapidly, and complete solid stake operation.
D, complete solid stake after, start mobile production platform jacking system, mobile production platform main hull risen to the above certain altitude in sea level, avoid the effect of wave and stream.Constantly adjust the ballast water of underwater platform, to ensure that underwater platform possesses enough buoyancy simultaneously.
E, installation top rigid riser system, in tieback water, well head system is to mobile production platform dry type well head system, gets through production of hydrocarbons passage, carries out production operation.
An evacuation method for ultra-deep sea marine oil and gas dry type production system, comprises the following steps:
A, when mobile production platform needs to withdraw, close well head system in water, reclaim top rigid riser system;
B, transfer mobile production platform main hull to predetermined water line place;
C, arrange mobile production platform main hull ballast water, start jacking system and spud leg is risen to predetermined altitude; Adjust underwater platform ballast water simultaneously, make it to be unlikely to for lower rigid riser systems and tension force anchoring system provided hightension;
D, employing tugboat are dragged away from.
Compared with prior art, the present invention has following beneficial effect:
1, ultra-deep sea production platform is designed to a mobile production platform and a underwater platform by the present invention.Because underwater platform bears lower rigid riser systems weight, therefore, the requirement of heavy production riser to mobile production platform is decreased.
2, the underwater platform in the present invention is positioned at 50 ~ 200 meters of bmsl, significantly reduces the disastrous environmental key-element in sea to the effect of underwater platform.
3, the mobile production platform in the present invention in normal operation, its main hull is supported by four spud legs and rises to the above certain altitude in sea level, therefore, main hull is no longer subject to the effect of wave and stream loading, significantly reduces the wave force suffered by whole system and stream loading active force.
4, the mobile production platform in the present invention achieves mobile shallow water production platform in the marine expanded application of ultra-deep.Compared with the production platform of current ultra-deep sea, form of structure is simple, reduces construction cost.
5, the mobile production platform in the present invention when mounted, only needs to select suitable working window, carries out pitching pile, avoid and use large-scale installation vessel, reduce installation risk and cost under assisting of ship is assisted on sea.Simultaneously when withdrawing, only needing decline main hull to predetermined drinking water place, carrying out pile pulling operation, program of therefore withdrawing is simple, shortens the departure time.
6, the mobile production platform in the present invention is arranged on underwater platform, therefore, avoids the complicated mooring and positioning system using current ultra-deep sea production platform to need.
7, with Chinese patent (patent No.: ZL 2011104418836), Chinese patent (patent No.: ZL2013204961047) and current production reality, available dry type oil and gas development equipment (tension leg platform (TLP) and open side type platform) is compared, the dry type well head system that the present invention adopts and dry type produce equipment, be convenient to the layout on mobile production platform, there is the advantage that operation is easy to maintenance, efficiency is high, be convenient to control.Therefore, there is obvious Technical Economy.
Accompanying drawing explanation
The present invention has 11, accompanying drawing, wherein
Fig. 1 is the underwater platform of the present invention's installation in position.
Fig. 2 is the top view of underwater platform of the present invention.
Fig. 3 is mobile production platform of the present invention.
Fig. 4 is mobile production platform top view of the present invention.
Fig. 5 is that mobile production platform of the present invention moves boat to target marine site schematic diagram.
Fig. 6 is that mobile production platform of the present invention arrives target marine site, transfers spud leg schematic diagram.
Fig. 7 is mobile production platform installation in position schematic diagram of the present invention.
Fig. 8 is the schematic diagram after the present invention installs top rigid riser system.
Fig. 9 is the schematic diagram after the present invention reclaims lower rigid riser systems when withdrawing.
Figure 10 is that the present invention promotes spud leg schematic diagram when withdrawing.
Figure 11 is that schematic diagram withdrawn by mobile production platform of the present invention.
In figure: 1, underwater platform, 2, spud can groove, 3, well head system in water, 4, lower rigid riser systems, 5, subsea wellheads system, 6, tension force anchoring system, 7, sea bed, 8, sea level, 9, cylindrical leg, 10, spud can, 11, main hull, 12, top rigid riser system.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described.
As shown in figs. 1-11, a kind of ultra-deep sea marine oil and gas dry type production system, comprises mobile production platform, dry type produces well head system 3 in equipment, underwater platform 1, rigid riser system, tension force anchoring system 6 and water.
Described rigid riser system, comprises lower rigid riser systems 4 and top rigid riser system 12.Lower rigid riser systems 4 by production of hydrocarbons passage by well head system 3 in subsea wellheads system 5 tieback to water, top rigid riser system 12 by production of hydrocarbons passage by well head system in water 3 tieback to the dry type well head system of mobile production platform.
Described mobile production platform, producing equipment and top rigid riser system 12 for supporting dry type, being fixed on underwater platform 1 by transferring four cylindrical legs 9.
Described dry type produces equipment, is positioned at sea level more than 8, is supported by mobile production platform.
Described underwater platform 1, is positioned at, less than 8 50 ~ 200 meters, sea level, for supporting well head system 3 and lower rigid riser systems 4 in water, provides support basis simultaneously, be fixed on sea bed 7 by tension force anchoring system 6 for portable production platform.
Described tension force anchoring system 6, comprises flexible coupling, tension force mooring line and suction anchor.Tension force mooring line top by flexible coupling connect underwater platform 1, bottom connect suction anchor, by suction anchor by underwater platform 1 mooring at sea bed 7.
Installation evacuation method of the present invention is as follows:
As shown in Figure 1, underwater platform 1 is completed by tension force anchoring system 6 and installs location, adopts lower rigid riser systems 4 by well head system 3 in subsea wellheads system 5 tieback to water.
As shown in Figure 2, be underwater platform 1 top view.
As shown in Figure 3, for being in the mobile production platform of transit condition.
As shown in Figure 4, be mobile production platform top view.
When mobile production platform move boat carry out production operation to target marine site time, need to carry out following operation:
As shown in Figure 5, after underwater platform 1 installation in position, mobile production platform moves boat to target marine site.
As shown in Figure 6, mobile production platform transfers four cylindrical legs 9 after arriving target marine site, transfers when spud can 10 only has the place of 3-5 rice to suspend apart from underwater platform 1.The spraying system carried is used to clear up spud can groove 2.
As shown in Figure 7, mobile production platform, in the auxiliary lower location of well of workboat, completes in place.Under suitable working window, rapidly cylindrical leg 9 is transferred, enter in spud can groove 2 under making spud can 10 smoothly, complete spud leg and fix.Rise the above predetermined altitude in mobile production platform main hull 11 to sea, sea.Meanwhile, constantly discharge ballast water, the adjustment of tonicity anchoring system 6 of underwater platform 1, to ensure that underwater platform 1 effectively can support mobile production platform, meanwhile, also can provide enough top tensile forces for lower rigid riser systems 4 and tension force anchoring system 6.
As shown in Figure 8, top rigid riser system 12 is installed, by well head system in water 3 tieback to the dry type well head system of mobile production platform, opens production of hydrocarbons passage, carry out production operation.
When withdrawing mobile production platform, need to carry out following operation:
As shown in Figure 9, close producing well, reclaim top rigid riser system 12, close well head system 3 in water.
As shown in Figure 10, mobile production platform main hull 11 is dropped to predetermined water line place, meanwhile, constantly in underwater platform 1, injects ballast water, adjustment of tonicity anchoring system 6, ensures that underwater platform 1 can provide suitable tensile force for lower rigid riser systems 4 and tension force anchoring system 6.Whole cylindrical leg 9 that hoists makes spud can 10 extract spud can groove 2.
As shown in figure 11, cylindrical leg 9 is promoted to predetermined altitude, mobile production platform moves boat to next target marine site.
Claims (3)
1. a ultra-deep sea marine oil and gas dry type production system, is characterized in that: comprise mobile production platform, dry type produces well head system (3) in equipment, underwater platform (1), rigid riser system, tension force anchoring system (6) and water;
Described rigid riser system, comprises lower rigid riser systems (4) and top rigid riser system (12); Lower rigid riser systems (4) by production of hydrocarbons passage by well head system (3) in subsea wellheads system (5) tieback to water, top rigid riser system (12) by production of hydrocarbons passage by well head system in water (3) tieback to the dry type well head system of mobile production platform;
Described mobile production platform, producing equipment and top rigid riser system (12) for supporting dry type, being fixed on underwater platform (1) by transferring four cylindrical legs (9);
Described dry type produces equipment, is positioned at more than sea level (8), is supported by mobile production platform;
Described underwater platform (1), be positioned at 50 ~ 200 meters of below, sea level (8), for supporting well head system in water (3) and lower rigid riser systems (4), provide support basis for portable production platform simultaneously, be fixed on sea bed (7) by tension force anchoring system (6);
Described tension force anchoring system (6), comprises flexible coupling, tension force mooring line and suction anchor; Tension force mooring line top connects underwater platform (1) by flexible coupling, bottom connect suction anchor, by suction anchor by underwater platform (1) mooring in sea bed (7).
2. a mounting method for ultra-deep sea as claimed in claim 1 marine oil and gas dry type production system, is characterized in that: comprise the following steps:
A, to arrive before target marine site at mobile production platform, first, pre-installation underwater platform (1), by underwater platform (1) by tension force anchoring system (6) mooring on sea bed (7); Then, adopt lower rigid riser systems (4) by well head system (3) in subsea wellheads system (5) tieback to the water of underwater platform (1); Finally, adjustment tension force anchoring system (6), completes the work location of underwater platform (1);
B, by mobile production platform towage to target marine site, transfer four cylindrical legs (9) to from the place of underwater platform (1) upper deck 3-5 rice, time-out is transferred; Then tugboat auxiliary under determine well location and spud can groove (2) position, complete in place;
C, the spraying system adopting mobile production platform spud leg to carry rinse the spud can groove (2) of cleaning underwater platform (1), under the wind, unrestrained very little working window of correspondence, rapidly whole spud leg is synchronously transferred in the spud can groove (2) of underwater platform (1), and complete solid stake operation;
D, complete solid stake after, start mobile production platform jacking system, mobile production platform main hull (11) risen to sea level (8) above certain altitude, avoids the effect of wave and stream; Constantly adjust the ballast water of underwater platform (1), to ensure that underwater platform (1) possesses enough buoyancy simultaneously;
E, installation top rigid riser system (12), in tieback water, well head system (3) is to mobile production platform dry type well head system, gets through production of hydrocarbons passage, carries out production operation.
3. an evacuation method for ultra-deep sea as claimed in claim 1 marine oil and gas dry type production system, is characterized in that: comprise the following steps:
A, when mobile production platform needs to withdraw, close well head system (3) in water, reclaim top rigid riser system (12);
B, transfer mobile production platform main hull (11) to predetermined water line place;
C, arrange mobile production platform main hull (11) ballast water, start jacking system and spud leg is risen to predetermined altitude; Adjust underwater platform (1) ballast water simultaneously, make it to be unlikely to for lower rigid riser systems (4) and tension force anchoring system (6) provided hightension;
D, employing tugboat are dragged away from.
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| CN106522896A (en) * | 2016-12-02 | 2017-03-22 | 大连理工大学 | Double-layer underwater production supporting floating barrel and installation and recycling methods thereof |
| CN108533232A (en) * | 2018-03-09 | 2018-09-14 | 中国石油大学(北京) | A kind of underwater hovering clump formula manifold system |
| CN112502658A (en) * | 2020-10-19 | 2021-03-16 | 中海石油(中国)有限公司 | Installation method of oil gas production wet type protection structure located under seabed mud surface |
| CN112727408A (en) * | 2020-12-03 | 2021-04-30 | 中海石油(中国)有限公司 | Installation method of oil-gas production dry-type protection structure located under seabed mud surface |
| CN113605440A (en) * | 2021-08-24 | 2021-11-05 | 江苏科技大学 | Deep sea rock seabed suction anchor applying bionic adhesion device |
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Cited By (8)
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| CN106522896A (en) * | 2016-12-02 | 2017-03-22 | 大连理工大学 | Double-layer underwater production supporting floating barrel and installation and recycling methods thereof |
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| CN112502658A (en) * | 2020-10-19 | 2021-03-16 | 中海石油(中国)有限公司 | Installation method of oil gas production wet type protection structure located under seabed mud surface |
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| CN113605440A (en) * | 2021-08-24 | 2021-11-05 | 江苏科技大学 | Deep sea rock seabed suction anchor applying bionic adhesion device |
| CN113605440B (en) * | 2021-08-24 | 2022-03-04 | 江苏科技大学 | Deep sea rock seabed suction anchor applying bionic adhesion device |
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| CN105003232B (en) | 2018-01-30 |
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