CN103397871B - A kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof - Google Patents
A kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof Download PDFInfo
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Abstract
The invention discloses a kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof, described system 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 underwater well head cabin, and described underwater well head cabin is arranged on the well of floating drum in water 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 water surface following degree of depth 100 ~ 400m place, by tension cables mooring on sea bed.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, compared with wet-type christmas tree, avoid seawater corrosion and pressure, and the impact such as bottom silt and marine growth; Its strong adaptability, easy and safe to operate, maintenance cost is low, can be completely achieved to exempt from diver and install.
Description
Technical field
The present invention relates to a kind of ultra-deep-water oil-gas field development application technology, particularly a kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof.
Background technology
Along with the mankind are to the development of the expanding day of petroleum resources demand and Offshore Oil Industry technology, marine petroleum exploitation is towards ultra-deep-water (1500 ~ 3000m) and profound water (being greater than 3000m) future development.
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 system.Whether directly contact with seawater according to the operating environment of production tree and can be divided into dry type tree and wet-type christmas tree.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.
Dry type tree waterborne in use, is arranged on water surface floating type process units by existing floating oil production system, and the weight of production tree and the weight of bottom water neutral tube are born by water surface floating type process units.Along with the increase of operating depth, length and the weight of water neutral tube constantly increase, more and more higher to the technical requirements of water surface floating type process units and water neutral tube system.
Underwater dry-type Christmas tree or wet-type christmas tree in use, are directly installed on seabed by existing submerged production system.For underwater dry-type Christmas tree, when applying, production tree and auxiliary equipment thereof are arranged in a wellhead chamber sealed and completely cut off with seawater.Along with the increase of operating depth, there is higher requirement to the intensity, compressive property etc. of the shape in underwater well head cabin, size, seal and material, and install more complicated.
To sum up, the application depth of water of existing dry type tree technology is subject to certain restrictions, and applies very few in ultra-deep-water and the exploitation of profound aqueous hydrocarbon field.
At present, in ultra-deep-water environment, adopt wet-type christmas tree more.But because it is directly exposed in seawater, seriously corroded, is subject to the impact of bottom silt, marine growth etc., to the anti-seawater corrosion ability of material and the requirement of the performance such as intensity, toughness very high; And after the depth of water exceedes certain limit, structure is more complicated, with high costs, 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 is larger, production riser is excessive owing to conducting oneself with dignity, and can cause the dynamic response of water surface floating type process units and the series of problems such as oversize.
Based on the problems referred to above, under ultra-deep-water and profound water environment, the safety of existing production tree technology, feasibility and economic serviceability all cannot meet the demands.
Summary of the invention
For solving the problems referred to above existed when existing production tree technology is applied in ultra-deep-water environment, the present invention will design a kind of ultra-deep-water oil and gas development system based on existing dry type tree and mounting method thereof, to reduce the technical requirements to water surface floating type process units and water neutral tube system when existing dry type tree waterborne is applied in ultra-deep-water environment, and existing underwater dry-type Christmas tree when applying in ultra-deep-water environment to wellhead chamber intensity, the requirement of compressive property and seal etc., and the series of problems run into when avoiding wet-type christmas tree to apply in ultra-deep-water, thus promote the ability to work of existing offshore oil production system, safer, economic and reply ultra-deep-water and profound water marine environment effectively every challenge.
For achieving the above object, technical scheme of the present invention is as follows: a kind of ultra-deep-water oil and 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 underwater well head cabin, and described underwater well head cabin to be arranged in water 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 water surface following degree of depth 100 ~ 400m place, by tension cables mooring on sea bed; In water, floating drum well head head is connected by lower rigid standpipe with subsea wellhead installations; The lower end of described top compliant riser exports with manifold apparatus in water and is connected, and the upper end of top compliant riser is connected with water surface floating type process units.
Based on a mounting method for the ultra-deep-water oil and gas development system of dry type tree, comprise 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, and complete the brill Completion Operations of offshore oil and gas field, 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, underwater well head cabin hydraulic connector is connected on leading truck, with drilling rod, underwater well head cabin is transferred along guide line together with hydraulic connector, and be positioned at well head head place provisional guide seats auxiliary under, complete the connection of floating drum well head head in hydraulic connector and water;
B2, through sealing pressure testing after, drill ship is withdrawn;
The connection of manifold apparatus in C, underwater well head cabin and water
Assisting by underwater robot ROV, complete the connection of manifold apparatus entrance in underwater well head cabin flow line and water, flow line manifold apparatus in water in several underwater well head cabin collects becomes a flow line;
The connection of manifold apparatus and water surface floating type process units in D, top compliant riser and water
Assisting by ROV, completes the connection of manifold apparatus in compliant riser lower end, top and water, and the connection 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, lower rigid standpipe, water, final arrival water surface floating type process units, thus 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, compared with wet-type christmas tree, avoid 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 diver and install.
2, due to the present invention adopt with land substantially identical conventional dry production tree, all devices can adopt standard and ready-made model, long service life, and automaticity is high, and its operation, operation and maintenance maintenance facilitate, advantage of lower cost; Production tree and relevant device thereof are transferred together with underwater well head cabin is after ground installs, and shorten the activity duration;
3, because underwater well head cabin of the present invention to be arranged in water on floating drum instead of on water surface floating type process units, the weight of production tree and the weight of lower rigid standpipe are born by floating drum in water, compared with the floating oil production system of routine, present invention alleviates the supporting power of water surface floating type process units, avoid the problems such as water surface floating type process units dynamic loading is excessive;
4, underwater well head cabin of the present invention is arranged on floating drum instead of seabed in the water of certain depth under water, compared with the submerged production system being installed on seabed of routine, present invention, avoiding the I&M operation of ultra-deep-water environment, reduce task difficulty and the requirement to equipment, improve safety and reliability;
5, in water of the present invention, floating drum is positioned at certain depth instead of sea under water, and alleviate the impact of the environmental loads such as sea surface wind, wave, stream, and go for different operating water depths, its feasibility and work capacity are greatly improved; Go for the profound water marine oil gas field development of more than 3000 meters.
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 cabin of the present invention 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, underwater well head cabin, 9, ROV, 10, subsea wellhead installations, 11, tension cables, 12, lower rigid standpipe, 13, floating drum in water, 14, flow line, 15, top compliant riser, 16, water surface floating type process units, 17, manifold apparatus in water.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in Figure 1, a kind of ultra-deep-water oil and gas development system adopting dry type tree, comprises 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 at D(100 ~ 400m under water) depth, be fixed in the pile foundation (figure does not show) being arranged in sea bed 7 by tension cables 11, thus the motion amplitude of floating drum 13 in water can be reduced; And owing to avoiding the stronger environmental load active region of Layer Near The Sea Surface, make floating drum 13 in water have good performance in place;
Described lower rigid standpipe 12 lower end is connected with subsea wellhead installations 10, and upper end is connected with well head head 5 lower end of floating drum in water 13; Tensioning under the effect of lower rigid standpipe 12 floating drum 13 buoyancy in water; The tensile force of crossing brought by floating drum in water 13 or subsea wellheads pressure is born by tension cables 11, prevents lower rigid standpipe 12 to be pulled off;
In described water, floating drum well head head 5 place is provided with provisional guide seats 1, is convenient to underwater well head cabin 8 and docks with the accurate of well head head 5.
Described top compliant riser 15 lower end is connected with manifold apparatus 17 in the water on floating drum in water 13, and top compliant riser 15 upper end is connected with the water surface floating type process units 16 at sea 6 place.
On sea, following degree of depth D place awaits orders described underwater robot ROV9, 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 to be arranged in water on floating drum well head head 5.Production tree to be arranged in water on floating drum 13, compared with existing dry type tree application technology waterborne, reduce the technical requirements to water surface floating type process units and water neutral tube system, compared with existing underwater dry-type Christmas tree, reduce the requirement to wellhead chamber intensity, compressive property and seal etc., compared with the wet-type christmas tree being installed on seabed, reduce the requirement to hardware, it is installed and maintenance is more prone to, and substantially increases 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, lower rigid standpipe 12, water, final arrival water surface floating type process units 16 processes, thus completes the exploitation work of Marine oil and gas resource.
Based on a mounting method for the ultra-deep-water oil and gas development system of dry type tree, 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 (not showing in figure) are in place, and complete the brill Completion Operations of offshore oil and gas field, 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 subsea wellhead installations 10 and floating drum well head head 5 in water;
The installation in B, underwater well head cabin 8
B1, underwater well head cabin 8 hydraulic connector 3 is 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 be positioned at well head head 5 place provisional guide seats 1 auxiliary under, complete the connection of hydraulic connector 3 and floating drum well head head 5 in water;
B2, through sealing pressure testing after, drill ship (not showing in figure) is withdrawn;
The connection of pipeline in C, water
C1, auxiliary by ROV9, complete the connection of manifold apparatus 17 and the flow line 14 in underwater well head cabin 8 in water, and the connection of manifold apparatus 17 and top compliant riser 15 lower end in water;
C2, assisting by ROV9, complete top compliant riser 15 upper end to the connection of water surface floating type process units 16.
So far, a kind of ultra-deep-water oil and gas development system based on dry type tree installs.
Claims (1)
1., based on a mounting method for the ultra-deep-water oil and gas development system of dry type tree, described system comprises 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 in water (17);
In described water, floating drum (13) is positioned at the water surface following degree of depth 100 ~ 400m place, by tension cables (11) mooring on sea bed (7); In water, floating drum well head head (5) is connected by lower rigid standpipe (12) with subsea wellhead installations (10); The lower end of described top compliant riser (15) exports with manifold apparatus in water (17) and is connected, and the upper end of top compliant riser (15) is connected with water surface floating type process units (16);
It is characterized in that: described method 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 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, the well head head (5) of floating drum (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 at well head head (5) place provisional guide seats (1) auxiliary under, complete the connection of hydraulic connector (3) and floating drum well head head (5) in water;
B2, through sealing pressure testing after, drill ship is withdrawn;
The connection of manifold apparatus (17) in C, underwater well head cabin (8) and water
Assisting by underwater robot ROV (9), complete the flow line (14) of underwater well head cabin (8) and the connection of manifold apparatus (17) entrance in water, flow line (14) manifold apparatus (17) in water of several underwater well head cabin (8) collects becomes a flow line;
The connection of manifold apparatus (17) and water surface floating type process units (16) in D, top compliant riser (15) and water
Assisting by ROV (9), complete the connection of manifold apparatus (17) in top compliant riser (15) lower end and water, and the connection of top compliant riser (15) upper end and water surface floating type process units (16).
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| CN201310354619.8A CN103397871B (en) | 2013-08-14 | 2013-08-14 | A kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof |
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| CN201310354619.8A CN103397871B (en) | 2013-08-14 | 2013-08-14 | A kind of ultra-deep-water oil and gas development system based on dry type tree and mounting method thereof |
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| CN103397871B true CN103397871B (en) | 2015-10-28 |
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