CN103397871A - Dry-type Christmas tree based ultra-deepwater oil and gas development system and mounting method thereof - Google Patents
Dry-type Christmas tree based ultra-deepwater oil and gas development system and mounting method thereof Download PDFInfo
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- CN103397871A CN103397871A CN2013103546198A CN201310354619A CN103397871A CN 103397871 A CN103397871 A CN 103397871A CN 2013103546198 A CN2013103546198 A CN 2013103546198A CN 201310354619 A CN201310354619 A CN 201310354619A CN 103397871 A CN103397871 A CN 103397871A
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Abstract
The invention discloses a dry-type Christmas tree based ultra-deepwater oil and gas development system and a mounting method thereof. The system comprises a water float, underwater wellhead chambers, dry-type Christmas trees, a water manifold device, an upper flexible stand pipe and a floating-type water surface production device, wherein the dry-type Christmas trees and related equipment are mounted in the underwater wellhead chambers; the underwater wellhead chambers are formed in a wellhead of the water float; oil outlet pipelines of the underwater wellhead chambers are connected with the inlet of the water manifold device; the water float is positioned in the position with the depth of 100-400 m under the water, and is moored to a sea bed through tension cables. According to the invention, the underwater dry-type Christmas trees are adopted, and the dry-type Christmas trees and the related equipment are separated from the sea water environment through the underwater wellhead chambers, so that compared with wet-type Christmas trees, influence of marine corrosion and pressure as well as sea bed sludge and marine creatures on the dry-type Christmas trees is avoided; the suitability is strong, the operation is convenient and safe, the maintenance cost is low, and the situation that divers are not needed to perform installation can be realized completely.
Description
Technical field
The present invention relates to a kind of super deep water hydrocarbon field Application and Development technology, particularly a kind of super deepwater oil-gas development system and mounting method thereof based on dry type tree.
Background technology
To the expanding day of petroleum resources demand and the development of Offshore Oil Industry technology, marine petroleum exploitation is towards super deep water (1500～3000m) and profound water (greater than 3000m) future development along with the mankind.
At present, deepwater production adopts floating oil production system or submerged production system usually.Production tree is the important component part of various oil extraction systems.Whether the operating environment according to production tree directly contacts and it can be divided into to dry type tree and wet-type christmas tree with seawater.Dry type tree can be divided into dry type tree waterborne and underwater dry-type Christmas tree again according to its installation site.Dry type tree waterborne is the important component part of floating oil production system; Underwater dry-type Christmas tree and wet-type christmas tree are the important component parts of submerged production system.
Existing floating oil production system in use, is arranged on dry type tree waterborne on the water surface floating type process units, and the weight of the weight of production tree and bottom water neutral tube is born by the water surface floating type process units.Along with the increase of operating depth, length and the weight of water neutral tube constantly increase, and is more and more higher to the technical requirements of water surface floating type process units and water neutral tube system.
Existing submerged production system in use, directly is installed on seabed by underwater dry-type Christmas tree or wet-type christmas tree.For underwater dry-type Christmas tree, in when application, production tree and auxiliary equipment thereof are arranged in the wellhead chamber of a sealing isolated with seawater.Along with the increase of operating depth, the intensity of shape, size, seal and the material in underwater well head cabin, compressive property etc. are had to higher requirement, and install more complicated.
To sum up, the application depth of water of existing dry type tree technology is subject to certain restrictions, and application is very few in super deep water and the exploitation of profound aqueous hydrocarbon field.
At present, many employing wet-type christmas trees in super deepwater environment.Yet because it is directly exposed in seawater, seriously corroded, be subject to the impact of bottom silt, marine growth etc., to the anti-seawater corrosion ability of material, and the requirement of the performances such as intensity, toughness very high; And after the depth of water surpassed certain limit, structure is more complicated, and was with high costs, and its operation, maintenance cost increase thereupon, and the techniques such as installation, well workover are also more complicated.In addition, when the depth of water was larger, production riser, because deadweight is excessive, can cause dynamic response and the series of problems such as oversize of water surface floating type process units.
Based on the problems referred to above, under super deep water and profound water environment, safety, feasibility and the economic serviceability of existing production tree technology all can't meet the demands.
Summary of the invention
for solving when existing production tree technology is applied in super deepwater environment the problems referred to above that exist, the present invention will design a kind of super deepwater oil-gas development system and mounting method thereof based on existing dry type tree, while to reduce existing dry type tree waterborne, in super deepwater environment, applying to the technical requirements of water surface floating type process units and water neutral tube system, and existing underwater dry-type Christmas tree while in super deepwater environment, applying to wellhead chamber intensity, the requirement of compressive property and seal etc., and the series of problems that runs into while avoiding wet-type christmas tree to apply in super deep water, thereby promote the ability to work of existing offshore oil production system, safer, economy and every challenge of the super deep water of reply and profound water marine environment effectively.
For achieving the above object, technical scheme of the present invention is as follows: a kind of super deepwater oil-gas development system based on dry type tree comprises manifold apparatus, top compliant riser and water surface floating type process units in floating drum in water, underwater well head cabin, dry type tree, water;
Described dry type tree and relevant device thereof are installed in the underwater well head cabin, and described underwater well head cabin is arranged in water the floating drum well in word; The flow line in underwater well head cabin is connected with the entrance of manifold apparatus in water;
In described water, floating drum is positioned at the following degree of depth 100～400m of water surface place, by the tension cables mooring on sea bed; In water, floating drum well head head is connected by the bottom rigid riser with subsea wellhead installations; The lower end of described top compliant riser is connected with manifold apparatus outlet in water, and the upper end of top compliant riser is connected with the water surface floating type process units.
A kind of mounting method of the super deepwater oil-gas development system based on dry type tree comprises the following steps:
A, previous work
A1, dry type tree and relevant device and underwater well head cabin install on the coast;
A2, drill ship are in place, complete the brill Completion Operations of offshore oil and gas field, and subsea wellhead installations installs;
In A3, water, floating drum installs, and in water, floating drum well head head installs;
A4, complete the tieback of floating drum well head head in subsea wellhead installations and water;
The installation in B, underwater well head cabin
B1, the underwater well head cabin is connected on leading truck with hydraulic connector, with drilling rod, the underwater well head cabin is transferred along guide line together with hydraulic connector, and, under the provisional guide seats that is positioned at well head head place auxiliary, complete being connected of floating drum well head head in hydraulic connector and water;
B2, through the sealing pressure testing after, drill ship is withdrawn;
In C, underwater well head cabin and water, manifold apparatus is connected
Auxiliary by underwater robot ROV, complete being connected of manifold apparatus entrance in underwater well head cabin flow line and water, and flow line manifold apparatus in water in several underwater well heads cabin collects becomes a flow line;
In D, top compliant riser and water, manifold apparatus and water surface floating type process units is connected
Auxiliary by ROV, complete being connected of manifold apparatus in compliant riser lower end, top and water, and being connected of compliant riser upper end, top and water surface floating type process units.
When the present invention works, the petroleum resources in seabed is by manifold apparatus, top compliant riser in floating drum well head head, underwater well head cabin, flow line, water in subsea wellheads, bottom rigid riser, water, finally arrive the water surface floating type process units, thereby complete the exploitation work of marine oil and gas resource.
Compared with prior art, the present invention has following advantage:
1, because the present invention adopts underwater dry-type Christmas tree, production tree and relevant device thereof are separated by underwater well head cabin and briny environment, with wet-type christmas tree, compare, avoided seawater corrosion and pressure, and the impact of bottom silt and marine growth etc.; Its strong adaptability, easy and safe to operate, maintenance cost is low, can be completely achieved to exempt from the diver and install.
2, because the present invention adopts and land essentially identical conventional dry type tree, all devices can adopt standard and ready-made model, long service life, and automaticity is high, and its operation, operation and maintenance maintenance are convenient, and cost is relatively low; Production tree and relevant device thereof are transferred together with the underwater well head cabin is after ground installs, shortened the activity duration;
3, because underwater well head of the present invention cabin is arranged in water on floating drum rather than on the water surface floating type process units, the weight of the weight of production tree and bottom rigid riser is born by floating drum in water, with the floating oil production system of routine, compare, the present invention has alleviated the supporting power of water surface floating type process units, has avoided the problems such as water surface floating type process units dynamic loading is excessive;
4, underwater well head of the present invention cabin is arranged on floating drum rather than seabed in the water of certain depth under water, with the submerged production system that is installed on seabed of routine, compare, the present invention has avoided the I&M operation of super deepwater environment, reduce task difficulty and, to the requirement of equipment, promoted safety and reliability;
5, in water of the present invention, floating drum is positioned at certain depth rather than sea under water, has alleviated the impact of the environmental loads such as sea surface wind, wave, stream, and has gone for different operating water depths, and its feasibility and work capacity are greatly improved; Go for the profound water marine oil gas field exploitation more than 3000 meters.
The accompanying drawing explanation
The present invention has 2 accompanying drawings, wherein:
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is underwater well head of the present invention cabin schematic diagram.
In figure: 1, provisional guide seats, 2, leading truck, 3, hydraulic connector, 4, dry type tree, 5, floating drum well head head in water, 6, sea, 7, sea bed, 8, the underwater well head cabin, 9, ROV, 10, subsea wellhead installations, 11, tension cables, 12, the bottom rigid riser, 13, floating drum in water, 14, flow line, 15, the top compliant riser, 16, water surface floating type process units, 17, manifold apparatus in water.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in Figure 1, a kind of super deepwater oil-gas development system that adopts dry type tree, comprise manifold apparatus 17, top compliant riser 15, water surface floating type process units 16 in floating drum 13 in water, underwater well head cabin 8, flow line 14, water.
In described water, floating drum 13 is positioned under water the depth of D(100～400m), by tension cables 11, is fixed on the pile foundation (figure does not show) that is arranged in sea bed 7 upper, thereby can reduces the motion amplitude of floating drum 13 in water; And, owing to having avoided the stronger environmental load active region of Layer Near The Sea Surface, make floating drum 13 in water have good performance in place;
In described water, floating drum well head head 5 places are equipped with provisional guide seats 1, are convenient to underwater well head cabin 8 and dock with the accurate of well head head 5.
In water in compliant riser 15 lower ends, described top and water on floating drum 13, manifold apparatus 17 is connected, and compliant riser 15 upper ends in top are connected with the water surface floating type process units 16 at 6 places, sea.
Following depth D place awaits orders described underwater robot ROV9 on sea, carries out necessary monitoring, and completes corresponding auxiliary installation work.
As shown in Figure 2, described dry type tree 4 and relevant device thereof are installed in underwater well head cabin 8, and described underwater well head cabin 8 is arranged in water on floating drum well head head 5.Production tree is arranged in water on floating drum 13, with existing dry type tree application technology waterborne, compare, reduced the technical requirements to water surface floating type process units and water neutral tube system, with existing underwater dry-type Christmas tree, compare, reduce the requirement to wellhead chamber intensity, compressive property and seal etc., with the wet-type christmas tree that is installed on seabed, compared, reduced the requirement to hardware, its installation and maintenance are more prone to, and have greatly improved work capacity.
The petroleum resources in seabed is by manifold apparatus 17, top compliant riser 15 in floating drum well head head 5, underwater well head cabin 8, flow line 14, water in subsea wellhead installations 10, bottom rigid riser 12, water, the final water surface floating type process units 16 that arrives is processed, thereby completes the exploitation work of marine oil and gas resource.
A kind of mounting method of the super deepwater oil-gas development system based on dry type tree comprises the following steps:
A, previous work
A1, dry type tree 4 and relevant device and underwater well head cabin 8 install on the coast;
A2, drill ship (in figure, showing) are in place, complete the brill Completion Operations of offshore oil and gas field, and subsea wellhead installations 10 installs;
In A3, water, floating drum 13 installs, and in water, floating drum well head head 5 installs;
A4, complete the tieback of floating drum well head head 5 in subsea wellhead installations 10 and water;
The installation in B, underwater well head cabin 8
B1, underwater well head cabin 8 use hydraulic connectors 3 are connected on leading truck 2, with drilling rod, underwater well head cabin 8 is transferred along guide line (not showing in figure) together with hydraulic connector 3, and, under the provisional guide seats 1 that is positioned at well head head 5 places auxiliary, complete being connected of floating drum well head head 5 in hydraulic connector 3 and water;
B2, after the sealing pressure testing, drill ship (in figure show) is withdrawn;
The connection of pipeline in C, water
C1, auxiliary by ROV9, being connected of flow line 14 that completes manifold apparatus 17 and underwater well head cabin 8 in water, and being connected of manifold apparatus 17 and top compliant riser 15 lower ends in water;
C2, auxiliary by ROV9, complete the connection of compliant riser 15 upper ends in top to water surface floating type process units 16.
So far, a kind of super deepwater oil-gas development system based on dry type tree installs.
Claims (2)
1. the super deepwater oil-gas development system based on dry type tree, is characterized in that: comprise manifold apparatus (17), top compliant riser (15) and water surface floating type process units (16) in floating drum in water (13), underwater well head cabin (8), dry type tree (4), water;
Described dry type tree (4) and relevant device thereof are installed in underwater well head cabin (8), and described underwater well head cabin (8) is arranged on the well head head (5) of floating drum in water (13); The flow line (14) in underwater well head cabin (8) is connected with the entrance of manifold apparatus (17) in water;
Floating drum in described water (13) is positioned at the following degree of depth 100～400m of water surface place, by tension cables (11) mooring on sea bed (7); In water, floating drum well head head (5) is connected by bottom rigid riser (12) with subsea wellhead installations (10); The lower end of described top compliant riser (15) is connected with manifold apparatus (17) outlet in water, and the upper end of top compliant riser (15) is connected with water surface floating type process units (16).
2. mounting method based on the super deepwater oil-gas development system of dry type tree is characterized in that: comprise the following steps:
A, previous work
A1, dry type tree (4) and relevant device and underwater well head cabin (8) install on the coast;
A2, drill ship are in place, complete the brill Completion Operations of offshore oil and gas field, and subsea wellhead installations (10) installs;
Floating drum in A3, water (13) installs, and the well head head (5) of floating drum in water (13) installs;
A4, complete the tieback of floating drum well head head (5) in subsea wellhead installations (10) and water;
The installation of B, underwater well head cabin (8)
B1, underwater well head cabin (8) are connected on leading truck (2) with hydraulic connector (3), with drilling rod, underwater well head cabin (8) are transferred along guide line together with hydraulic connector (3), and be positioned under provisional guide seats (1) that well head head (5) locates auxiliary, complete being connected of floating drum well head head (5) in hydraulic connector (3) and water;
B2, through the sealing pressure testing after, drill ship is withdrawn;
In C, underwater well head cabin (8) and water, manifold apparatus (17) is connected
By underwater robot ROV(9) auxiliary, being connected of manifold apparatus (17) entrance in the flow line (14) that completes underwater well head cabin (8) and water, the flow line (14) in several underwater well heads cabin (8) manifold apparatus (17) in water collects becomes a flow line;
In D, top compliant riser (15) and water, manifold apparatus (17) and water surface floating type process units (16) is connected
Pass through ROV(9) auxiliary, complete being connected of manifold apparatus (17) in top compliant riser (15) lower end and water, and being connected of top compliant riser (15) upper end and water surface floating type process units (16).
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| CN105003232A (en) * | 2015-07-23 | 2015-10-28 | 大连理工大学 | 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 |
| CN105041271A (en) * | 2015-07-29 | 2015-11-11 | 大连理工大学 | Decompression marine natural gas hydrate mining method and submarine mining system |
| CN106703761A (en) * | 2016-12-02 | 2017-05-24 | 大连理工大学 | Whole-dry type system for producing oil and gas in water and working method of whole-dry type system for producing oil and gas in water |
| CN107476775A (en) * | 2017-09-25 | 2017-12-15 | 中国海洋石油总公司 | One kind is aided in wellhead assembly and operating method under water |
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| CN105003232B (en) * | 2015-07-23 | 2018-01-30 | 大连理工大学 | A kind of ultra-deep sea marine oil and gas dry type production system and its installation evacuation method |
| CN105003232A (en) * | 2015-07-23 | 2015-10-28 | 大连理工大学 | 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 |
| CN105041271A (en) * | 2015-07-29 | 2015-11-11 | 大连理工大学 | Decompression marine natural gas hydrate mining method and submarine mining system |
| CN105041271B (en) * | 2015-07-29 | 2017-10-13 | 大连理工大学 | A kind of buck exploiting ocean natural gas hydrates method and sub-sea production systems |
| CN106703761B (en) * | 2016-12-02 | 2019-03-05 | 大连理工大学 | Hydrocarbon production system and its working method in dry type water |
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| CN107476775B (en) * | 2017-09-25 | 2019-10-18 | 中国海洋石油集团有限公司 | It is a kind of to assist under water to wellhead assembly and operating method |
| 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 |
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| CN108661608A (en) * | 2018-06-07 | 2018-10-16 | 中海油能源发展股份有限公司 | A kind of underwater dry-type extracting device of oil suitable for shallow water oil-gas field development |
| CN110578497A (en) * | 2018-06-11 | 2019-12-17 | 中国石油化工股份有限公司 | Functional cabin for underwater oil and gas drilling and production |
| CN108979598A (en) * | 2018-07-10 | 2018-12-11 | 中国石油大学(北京) | A kind of underwater hovering clump formula manifold system of built-in flexible jumper pipe |
| CN108979598B (en) * | 2018-07-10 | 2020-03-10 | 中国石油大学(北京) | Underwater suspension cluster manifold system with built-in flexible jumper tube |
| CN109098692A (en) * | 2018-08-07 | 2018-12-28 | 中国石油大学(北京) | A kind of installation method of underwater hovering clump formula manifold |
| CN109555480A (en) * | 2018-11-08 | 2019-04-02 | 中国海洋石油集团有限公司 | A kind of quick operation brill completion method based on sub-surface buoy |
| CN109916646A (en) * | 2019-02-23 | 2019-06-21 | 中国石油大学(华东) | Offshore oil equipment Test system and method based on marine environment |
| CN113323632A (en) * | 2020-02-28 | 2021-08-31 | 中国海洋石油集团有限公司 | Suction pile foundation disc type underwater dry production facility for shallow oil and gas field development |
| CN113898323A (en) * | 2020-06-22 | 2022-01-07 | 中国石油化工股份有限公司 | Offshore oil and gas field underwater production system and design method thereof |
| CN113898323B (en) * | 2020-06-22 | 2024-02-23 | 中国石油化工股份有限公司 | Marine oil and gas field underwater production system and design method thereof |
| 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 |
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