CN107269254A - A kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea - Google Patents
A kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea Download PDFInfo
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- CN107269254A CN107269254A CN201710573434.4A CN201710573434A CN107269254A CN 107269254 A CN107269254 A CN 107269254A CN 201710573434 A CN201710573434 A CN 201710573434A CN 107269254 A CN107269254 A CN 107269254A
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- hydrate
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- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 2
- 238000006703 hydration reaction Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 150000004677 hydrates Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea.The well group structure is adopted hot well and constituted by a bite producing well and a bite.The producing well is horizontal well, and net horizontal section is located at hydrate layer.The hot well of adopting has two horizontal branch wells, respectively the ground die mould geothermal layer positioned at hydrate layer and containing HTHP stratum water.The horizontal branch heel end top of the hot well in hydrate layer of adopting is provided with packer.The producing well net horizontal section and to adopt horizontal branch of the hot well in hydrate layer parallel to each other and positioned at top.Utilize well group structure of the present invention, high-temperature stratum waterborne return in deep is set to enter hydrate layer by adopting hot well, cause hydrate to be thermally decomposed and migrated upwards to horizontal production well, a large amount of heat loss directly from hot fluid caused by the water filling of ground in long lines are solved while water resource is saved.The present invention is hidden using deep rock thrust type geothermal energy exploitation hydrate, and its equipment is simple, and easy to operate, cost of winning is low.
Description
Technical field
The invention belongs to unconventionaloil pool production technique field, it is related to one kind using ground die mould geothermal energy exploitation seabed hydration
The well group structures and methods of thing.
Background technology
Gas hydrates are a kind of crystalline solids, and the caged screen work formed by hydrone wraps up gas molecule and (is usually
Methane) constitute.Compared with other existing fossil fuels, gas hydrates have two big advantages：First, hydrocarbonaceous amount is big, naturally
Gas hydrate contains a large amount of hydro carbons organic matters, and wherein phosphorus content is approximately twice of other global fossil fuels；Second, source is wide
It is general, it is estimated that, sea bed gas hydrate distribution accounts for the 10% of the ocean gross area.Oil, coal in face of increasingly depleted
The fossil fuel resources such as charcoal, gas hydrates are by the emphasis as exploitation.
Ground die mould geothermal energy refers to that Fluid pressure in stratum has exceeded the geothermal energy of hydrostatic pressure, and this kind of geothermal energy is except being
Outside a kind of heat resource, while a kind of still hydraulic power potentials, the feature with HTHP.At present, sea-bottom natural gas water is exploited
Steam, hot water, hot salt brine or other hot fluids are mainly pumped into natural gas hydrate stratum by the temperature activation method of compound from ground,
Make its temperature increase to reach the purpose of exploitation of gas hydrate Tibetan.However, being distributed in because of most hydrates super
In the bottom sediment for crossing the 300m depth of waters, what is had reaches several kms, is easily caused heat loss in pipeline excessive.For above-mentioned problem,
Of the invention to propose to hide using ground die mould geothermal energy extracting hydrate on bottom of sea, it utilizes the abnormal pressure of ground die mould geothermal layer in itself,
By hot water delivery in layer to hydrate layer, so as to reach exploitation hydrate, the purpose of reduction energy consumption and cost is reached.Profit of the invention
Hidden with deep rock thrust type geothermal energy exploitation hydrate, its equipment is simple, and easy to operate, cost of winning is low.
The content of the invention
The deficiency of hydrate is exploited for more than, the present invention provides one kind using ground die mould geothermal energy extracting hydrate on bottom of sea
Well group structure.
The present invention also provides a kind of utilization method of the above-mentioned well group structure by ground die mould geothermal energy extracting hydrate on bottom of sea.
Technical scheme is as follows：
A kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea, it is characterised in that by a bite producing well and
Hot well composition is adopted flatly, wherein, the producing well is horizontal well, and net horizontal section is located at hydrate layer；The hot well of adopting has two
Horizontal branch well, respectively the ground die mould geothermal layer positioned at hydrate layer and containing HTHP stratum water.The hot well of adopting is in water
Packer is provided with horizontal branch heel end 1~3m of top in compound layer；The hot well of adopting is in hydrate layer and ground die mould underground heat
Sleeve pipe between layer, which is cladded with, is stamped heat-insulation layer；It is described to adopt horizontal branch of the hot well in hydrate layer and the producing well horizontal well
Section is parallel to each other and positioned at bottom；The producing well and the horizontal branch for adopting hot well in hydrate layer are located at distance respectively
At the top and bottom 3-5m of hydrate layer, and the two length is identical, and its length range is 600-1500m；The hot well of adopting exists
Horizontal branch length in described ground die mould geothermal layer is in the range of 200-1000m.
It is a kind of to utilize method of the well group structure by ground die mould geothermal energy extracting hydrate on bottom of sea, it is characterised in that
Comprise the steps of：
(1) dynamic and static state parameters of hydrate layer and ground die mould geothermal layer are obtained；
(2) according to acquired parameter, the sea bottom hydrate block of contentedly die mould geothermal energy mining conditions is selected, it is described to open
The condition of adopting includes：
Hydrate layer thickness is more than 20m, and ground die mould geothermal layer thickness is more than 300m, and ground die mould geothermal layer temperature is more than 80
DEG C, ground die mould geothermal layer barometric gradient is more than 14.5KPa/m, and ground die mould geothermal layer permeability is more than 500mD, ground die mould geothermal layer
Depth is less than 2000m；
(3) hydrate exploitation, the producing well are carried out using the well group structure of ground die mould geothermal energy extracting hydrate on bottom of sea
Exploited with pressurization methods, bottom pressure scope is 0.3~0.7 times of the hydrate layer reset pressure；
(4) when the aerogenesis speed of the producing well is less than 200m3Exploitation terminates during/d.
The invention has the advantages that and advantage：
(1) solve in conventional hot-fluid injection method, heat-energy losses of the hot fluid in long lines；
(2) solve adopt hot well using peupendicular hole when, the contact area on peupendicular hole and stratum is small, and decomposition of hydrate is slow
Problem；
(3) decomposition of hydrate energy is from seabed ground die mould underground heat water layer, it is not necessary to be equipped with hot water and injection device, profit
Hot water can just be pressed into hydrate layer by land used die mould geothermal layer pressure itself, and equipment is simple, easy to operate.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea；
Wherein, 1. hydrate layer, 2. ground die mould geothermal layers, 3. impermeable rammells, 4. producing wells, 5. adopt hot well, 6. water
Divide the branch packer of 1,7. horizontal branch 2,8., 9. heat-insulation layers, 10. perforations equally.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing, but does not limit the practical range of the present invention.
A kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea, heat is adopted by a bite producing well 4 and a bite
Well 5 is constituted, wherein, the producing well 4 is horizontal well, and net horizontal section is located at hydrate layer 1；The hot well 5 of adopting has two levels
Multilateral Wells 6,7, respectively the ground die mould geothermal layer 2 positioned at hydrate layer 1 and containing HTHP stratum water；The hot well 5 of adopting exists
Packer 8 is provided with the heel end top 2m of horizontal branch 6 in hydrate layer 1；The hot well 5 of adopting is in hydrate layer 1 and ground die mould
Sleeve pipe between geothermal layer 2, which is cladded with, is stamped heat-insulation layer 9；It is described to adopt horizontal branch 6 of the hot well 5 in hydrate layer 1 and the life
The production net horizontal section of well 4 is parallel to each other and positioned at bottom；The producing well 4 is located at the top 5m of hydrate layer 1, described to adopt heat
Horizontal branch 6 of the well 5 in hydrate layer 1 is located at the bottom 5m of hydrate layer 1, and the two length is identical, and its length is all
For 1200m；Horizontal branch 7 length of the hot well 5 in described ground die mould geothermal layer 2 of adopting is 800m.
Flow process of the fluid in well group structure includes：
(1) deep formation water carries heat and passes through hanging down comprising the heat-insulation layer 9 by being returned in the horizontal well branch 7
Straight well section and the horizontal branch 6 enter hydrate layer 1, heat hydrate, are thermally decomposed it；
(2) decompose the gas produced and water is migrated to the producing well 4 upwards, pass through the producing well 4 exploitation to ground
Face.
It is a kind of to utilize the well group structure by the method for ground die mould geothermal energy extracting hydrate on bottom of sea, include following step
Suddenly：
(1) dynamic and static state parameters of hydrate layer and ground die mould geothermal layer are obtained；
(2) according to acquired parameter, the sea bottom hydrate block of contentedly die mould geothermal energy mining conditions is selected, it is described to open
The condition of adopting includes：
Hydrate layer thickness 50m, ground die mould geothermal layer thickness 400m, 110 DEG C of ground die mould geothermal layer temperature, ground die mould underground heat
Stressor layer gradient 15KPa/m, ground die mould geothermal layer permeability 600mD, ground die mould underground heat layer depth 1800m；
(3) hydrate exploitation, the producing well are carried out using the well group structure of ground die mould geothermal energy extracting hydrate on bottom of sea
Exploited with pressurization methods, bottom pressure is 0.5 times of the hydrate layer reset pressure；
(4) when the aerogenesis speed of the producing well is 200m3Exploitation terminates during/d.
Claims (7)
1. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea, it is characterised in that by a bite producing well and one
Mouth adopts hot well composition, wherein, the producing well is horizontal well, and net horizontal section is located at hydrate layer；The hot well of adopting has two water
Flat Multilateral Wells, the ground die mould geothermal layer positioned at hydrate layer and containing HTHP stratum water respectively, the hot well of adopting is in hydration
Horizontal branch in nitride layer and the producing well net horizontal section are parallel to each other and positioned at bottom.
2. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea according to claim 1, its feature
It is, packer is provided with the horizontal branch heel end 1~3m of top for adopting hot well in hydrate layer.
3. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea according to claim 1, its feature
It is, the sleeve pipe for adopting hot well between hydrate layer and ground die mould geothermal layer is overcoating to be stamped heat-insulation layer.
4. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea according to claim 1, its feature
Be, the producing well and the horizontal branch for adopting hot well in hydrate layer be located at respectively apart from the top of hydrate layer and
At the 3-5m of bottom.
5. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea according to claim 1, its feature
It is, the producing well is identical with the horizontal branch length for adopting hot well in hydrate layer, its length range is 600-
1500m。
6. a kind of well group structure using ground die mould geothermal energy extracting hydrate on bottom of sea according to claim 1, its feature
It is, the horizontal branch length for adopting hot well in described ground die mould geothermal layer is in the range of 200-1000m.
7. a kind of utilize method of the well group structure as claimed in claim 1 by ground die mould geothermal energy extracting hydrate on bottom of sea, its
It is characterised by, comprises the steps of：
(1) dynamic and static state parameters of hydrate layer and ground die mould geothermal layer are obtained；
(2) according to acquired parameter, the sea bottom hydrate block of contentedly die mould geothermal energy mining conditions, the exploitation bar are selected
Part includes：
Hydrate layer thickness is more than 20m, and ground die mould geothermal layer thickness is more than 300m, and ground die mould geothermal layer temperature is more than 80 DEG C, ground
Die mould geothermal layer barometric gradient is more than 14.5KPa/m, and ground die mould geothermal layer permeability is more than 500mD, ground die mould underground heat layer depth
Less than 2000m；
(3) hydrate exploitation is carried out using the well group structure of ground die mould geothermal energy extracting hydrate on bottom of sea, the producing well is with fixed
Pressure mode is exploited, and bottom pressure scope is 0.3~0.7 times of the hydrate layer reset pressure；
(4) when the aerogenesis speed of the producing well is less than 200m3Exploitation terminates during/d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710573434.4A CN107269254A (en) | 2017-07-14 | 2017-07-14 | A kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710573434.4A CN107269254A (en) | 2017-07-14 | 2017-07-14 | A kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea |
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| CN107269254A true CN107269254A (en) | 2017-10-20 |
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| CN201710573434.4A Pending CN107269254A (en) | 2017-07-14 | 2017-07-14 | A kind of well group structures and methods using ground die mould geothermal energy extracting hydrate on bottom of sea |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736753A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using individual well jointly pressure type underground heat exploitation of gas hydrate |
| CN109958410A (en) * | 2019-03-06 | 2019-07-02 | 大连理工大学 | A kind of device and method closing object using individual well joint underground heat production of water |
| CN110318675A (en) * | 2019-07-01 | 2019-10-11 | 山东科技大学 | A kind of Deep Coalbed Methane heat is total to mining method |
| CN110344801A (en) * | 2018-04-03 | 2019-10-18 | 齐鲁工业大学 | Fracturing work method, recovery method and mining system for combustible ice exploitation |
| CN113738317A (en) * | 2021-10-14 | 2021-12-03 | 中国矿业大学 | Method for combined exploitation of deep coal bed gas and dry hot rock type geothermal |
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| CN109958410A (en) * | 2019-03-06 | 2019-07-02 | 大连理工大学 | A kind of device and method closing object using individual well joint underground heat production of water |
| CN110318675A (en) * | 2019-07-01 | 2019-10-11 | 山东科技大学 | A kind of Deep Coalbed Methane heat is total to mining method |
| CN113738317A (en) * | 2021-10-14 | 2021-12-03 | 中国矿业大学 | Method for combined exploitation of deep coal bed gas and dry hot rock type geothermal |
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