CN106351615B - Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method - Google Patents
Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method Download PDFInfo
- Publication number
- CN106351615B CN106351615B CN201610931601.3A CN201610931601A CN106351615B CN 106351615 B CN106351615 B CN 106351615B CN 201610931601 A CN201610931601 A CN 201610931601A CN 106351615 B CN106351615 B CN 106351615B
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- China
- Prior art keywords
- hydrate
- acid solution
- stratum
- halogen family
- well
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 23
- 150000002367 halogens Chemical class 0.000 title claims abstract description 23
- 239000002253 acid Substances 0.000 title claims abstract description 22
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 10
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 34
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 230000020477 pH reduction Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 24
- 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 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004090 dissolution Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- 150000004677 hydrates Chemical class 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- VTVVPPOHYJJIJR-UHFFFAOYSA-N carbon dioxide;hydrate Chemical compound O.O=C=O VTVVPPOHYJJIJR-UHFFFAOYSA-N 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance 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
- 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
-
- 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
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The present invention provides a kind of halogen family acid solutions and solvable carbonate reaction to assist hydrate recovery method, step are as follows: a, carries out the exploitation of drainage and step-down method to hydrate formation first；B, when using drainage and step-down method occur hydrate formation gas production be obviously reduced be not able to satisfy industrial gas production require when, out of injection well or fractured well inject halogen family acid solution, until gully in liquid there is stopping when acidification phenomenon；C, solvable carbonate solution is injected out of injection well or fractured well, until stopping when liquid shows neutral in gully；D, step a, b and c are repeated.Halogen family acid solution can make acid-soluble obturator dissolution in stratum, increase the permeability on stratum, free methane gas is discharged from recovery well after being conducive to decomposition of hydrate；Solvable carbonate solution, the halogen family acid solution heat-producing chemical reaction in solvable carbonate solution and stratum are injected into stratum again, the heat for reacting generation can promote the decomposition of hydrate in stratum.
Description
Technical field
A kind of method that the present invention discloses exploitation of gas hydrates, this method are widely used in all kinds of containing natural gas hydration
The exploitation of gas hydrates operation on object stratum.
Background technique
Gas hydrates are widely paid close attention to due to its biggish reserves as following clean energy resource.Using
Reasonable technological means makes decomposition of hydrate free methane gas in stratum be the key technology for realizing natural gas hydrate exploitation.
Since gas hydrates can be stabilized under appropriate conditions of temperature and pressure, how to break containing gas water
The in-situ temperature and pressure state for closing object stratum are the technical problem underlyings for realizing gas hydrate dissociation in situ.Currently, opening
The method for adopting gas hydrates mainly has the exploitation of stratum voltage drop method, the exploitation of injection carbon dioxide replacement method and heat shock method exploitation.
Using in voltage drop method recovery process, existing with decomposition of hydrate in landing surface, formation temperature containing hydrate constantly declines, due to
Hydrate itself, which has " self-shield effect " and stratum lower temperature, causes hydrate to reach new stable equilibrium, leads to ground
The problem of layer decomposition of hydrate rate constantly reduces and may be finally stopped decomposition；And use in carbon dioxide replacement method, by
There are package gas hydrates in the carbon dioxide hydrate that displacement is formed, will cause the gas hydrates wrapped up can not
It further decomposes, eventually leads to the problem of gas hydrates can not decompose；When using heat shock method, due to the hot steam of filling
Or other hot fluids can only efficiently transfer heat to the hydrate formation around nearly well, and to make from heated well farther awayly
Layer in decomposition of hydrate when, a large amount of thermal energy need to be consumed, it is less economical there are exploitation of gas hydrates the problems such as.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides a kind of halogen family acid solution and solvable carbonate reaction are auxiliary
Hydrate recovery method is helped, this method greatly improves the production efficiency of gas hydrates.
In order to solve the above-mentioned technical problem, present invention employs following technical solutions:
Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method, and this method comprises the following steps:
A, the exploitation of drainage and step-down method is carried out to hydrate formation first, under conditions of can satisfy industry production gas, made
It is decomposed as far as possible using the hydrate that the exploitation of drainage and step-down method can decompose；
B, when there is hydrate formation gas production using drainage and step-down method and be obviously reduced not to be able to satisfy the requirement of industrial gas production
When, halogen family acid solution is injected out of injection well or fractured well, until liquid occurs stopping injection halogen family when acidification phenomenon in gully
Acid solution；
C, solvable carbonate solution is injected out of injection well or fractured well, until stopping note in gully when liquid shows neutral
Enter；
D, tri- steps of a, b and c are repeated, that realizes natural gas hydrate stratum stablizes decomposition and high yield.
The solution have the advantages that: the present invention provides halogen family acid solution and solvable carbonate reaction assists hydrate exploitation side
In method, the halogen family acid solution for being initially injected stratum can make acid-soluble obturator dissolution in stratum, increase the permeability on stratum,
Free methane gas is discharged from recovery well after being conducive to decomposition of hydrate；The present invention is being initially injected halogen family acid solution in stratum
Afterwards, and into stratum solvable carbonate solution is injected, exothermic chemical occurs for the halogen family acid solution in solvable carbonate solution and stratum
Reaction, the heat for reacting generation can promote the decomposition of hydrate in stratum；Meanwhile the halogen in solvable carbonate solution and stratum
Race's acid solution react generation carbon dioxide can with the gas hydrates in stratum occur displacement react, occur displacement reacts
The heat of generation further promotes the decomposition of hydrate, and the halogen family acid solution in solvable carbonate solution and stratum reacts generation
Halogen can be improved the salinity that water is generated after decomposition of hydrate, reduce the freezing point of water flooding, weaken formation gas hydration
Object promotes the decomposition of stratum hydrate from " protective effect ".
Specific embodiment
Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method, when creeping into Approaching Coal Seam, pause drilling
Operation is simultaneously passed through cryogen to bottom hole, drilling objects ahead coal seam is refrigerated to depth selection, and pass through the tripping in of ground drilling rod
The wire line coring that core plugging notifying mechanism of rope core drilling normally creeps into freezing coal seam operates.
This method specifically comprises the following steps:
A, the exploitation of drainage and step-down method is carried out to hydrate formation first, under conditions of can satisfy industry production gas, made
It is decomposed as far as possible using the hydrate that the exploitation of drainage and step-down method can decompose；
B, when there is hydrate formation gas production using drainage and step-down method and be obviously reduced not to be able to satisfy the requirement of industrial gas production
When, halogen family acid solution is injected out of injection well or fractured well, until liquid occurs stopping injection halogen family when acidification phenomenon in gully
Acid solution；
C, solvable carbonate solution is injected out of injection well or fractured well, until stopping note in gully when liquid shows neutral
Enter；
D, tri- steps of a, b and c are repeated, that realizes natural gas hydrate stratum stablizes decomposition and high yield.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (1)
1. halogen family acid solution and solvable carbonate reaction assist hydrate recovery method, which is characterized in that this method includes following step
It is rapid:
A, the exploitation of drainage and step-down method is carried out to hydrate formation first, under conditions of can satisfy industry production gas, makes applying
The hydrate that the exploitation of drainage and step-down method can decompose decomposes as far as possible；
B, when using drainage and step-down method occur hydrate formation gas production be obviously reduced so that it cannot meets industry gas production want
When asking, halogen family acid solution is injected out of injection well or fractured well, until liquid occurs stopping injection halogen when acidification phenomenon in gully
Race's acid solution；
C, solvable carbonate solution is injected out of injection well or fractured well, until stopping injection in gully when liquid shows neutral；
D, tri- steps of a, b and c are repeated, that realizes natural gas hydrate stratum stablizes decomposition and high yield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931601.3A CN106351615B (en) | 2016-10-31 | 2016-10-31 | Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610931601.3A CN106351615B (en) | 2016-10-31 | 2016-10-31 | Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106351615A CN106351615A (en) | 2017-01-25 |
| CN106351615B true CN106351615B (en) | 2019-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610931601.3A Expired - Fee Related CN106351615B (en) | 2016-10-31 | 2016-10-31 | Halogen family acid solution and solvable carbonate reaction assist hydrate recovery method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106351615B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575197A (en) * | 2017-10-23 | 2018-01-12 | 大庆东油睿佳石油科技有限公司 | A kind of method of row's formula horizontal well chemical flooding exploitation of gas hydrate |
| CN108194063A (en) * | 2018-03-07 | 2018-06-22 | 吉林大学 | Utilize the device and method of spontaneous heating material heating secondary buck exploitation hydrate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786416A (en) * | 2005-12-22 | 2006-06-14 | 中国石油大学(华东) | Method for extracting hydrate on bottom of sea by deep earth heart water circulation |
| CN105134152A (en) * | 2015-08-24 | 2015-12-09 | 中国石油大学(北京) | Method and system for extracting natural gas hydrate through thermal jet flow |
| CN105332681A (en) * | 2015-10-28 | 2016-02-17 | 吉林大学 | Thermal stimulation and chemical stimulation combined process of hot-dry-rock thermal reservoir |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9121259B2 (en) * | 2010-08-13 | 2015-09-01 | Board Of Regents, The University Of Texas System | Storing carbon dioxide and producing methane and geothermal energy from deep saline aquifers |
| CN102454394A (en) * | 2010-10-15 | 2012-05-16 | 中国海洋石油总公司 | Method for displacing methane from natural gas hydrate |
| US9091156B2 (en) * | 2011-03-03 | 2015-07-28 | Battelle Memorial Institute | Downhole fluid injection systems, CO2 sequestration methods, and hydrocarbon material recovery methods |
| CN103603638B (en) * | 2013-11-13 | 2016-06-22 | 大连理工大学 | A kind of gas hydrates CO in conjunction with voltage drop method2Replacement exploitation method |
| CN105715236B (en) * | 2014-08-12 | 2019-08-13 | 成都能生材科技开发有限责任公司仁寿分公司 | The environmental protection united low pressure supercooled liquid production technique of combustible ice well pattern |
| CN105822267B (en) * | 2016-03-31 | 2021-01-26 | 杨溢 | Method and device for exploiting deep sea natural gas hydrate |
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2016
- 2016-10-31 CN CN201610931601.3A patent/CN106351615B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786416A (en) * | 2005-12-22 | 2006-06-14 | 中国石油大学(华东) | Method for extracting hydrate on bottom of sea by deep earth heart water circulation |
| CN105134152A (en) * | 2015-08-24 | 2015-12-09 | 中国石油大学(北京) | Method and system for extracting natural gas hydrate through thermal jet flow |
| CN105332681A (en) * | 2015-10-28 | 2016-02-17 | 吉林大学 | Thermal stimulation and chemical stimulation combined process of hot-dry-rock thermal reservoir |
| CN105625998A (en) * | 2016-02-02 | 2016-06-01 | 西南石油大学 | Reverse production method and production equipment for seafloor natural gas hydrate stable layer |
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| Publication number | Publication date |
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| CN106351615A (en) | 2017-01-25 |
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Granted publication date: 20190719 Termination date: 20201031 |