CN113482545A - Mining method of deep-sea combustible ice - Google Patents
Mining method of deep-sea combustible ice Download PDFInfo
- Publication number
- CN113482545A CN113482545A CN202110968829.0A CN202110968829A CN113482545A CN 113482545 A CN113482545 A CN 113482545A CN 202110968829 A CN202110968829 A CN 202110968829A CN 113482545 A CN113482545 A CN 113482545A
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- Prior art keywords
- combustible ice
- air compressor
- oil pipe
- installing
- drilling
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005065 mining Methods 0.000 title description 15
- 238000005553 drilling Methods 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 3
- 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 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- -1 Natural gas hydrates Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/013—Connecting a production flow line to an underwater well head
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a method for exploiting deep-sea combustible ice, which comprises the following steps: s1: installing an offshore drilling platform, installing drilling equipment on the drilling platform, and drilling a well through the drilling equipment; s2: after the combustible ice layer is drilled, arranging two horizontal wells at certain intervals; s3: after reaching a certain depth, laying an oil pipe at the bottom of the well; s4: a sleeve is arranged at the wellhead, and vent pipelines are arranged on two sides of the sleeve; s5: installing an air compressor at a wellhead, connecting an outlet of the air compressor with the casing, and welding and fixing the end part of the oil pipe with the casing; s6: starting an air compressor, and discharging welding slag and dirt generated by welding through an emptying pipeline; s7: a heating device is arranged at the air compressor; this application is through the active heating cooperation geothermol power, can increase the exploitation efficiency of combustible ice.
Description
Technical Field
The invention belongs to the technical field of combustible ice mining, and particularly relates to a mining method of deep sea combustible ice.
Background
Natural gas hydrates are ice-like crystalline substances formed by natural gas and water under high-pressure and low-temperature conditions, and are also called "combustible ice", "solid gas" or "gas ice" because their appearance is like ice and can be burned when encountering fire. The natural gas hydrate is mainly buried in ocean deep sea bottom stratum, continental permafrost, slope zone of island, ridge of continental margin, polar continental frame and deep water lake bottom stratum of inland lake, the mining of the natural gas hydrate is still in exploration, pilot production and small-scale mining stages at present, the main reason of slow progress is that the mining mode of the natural gas hydrate is not known, and the disastrous influence on the environment is caused by the fact that the natural gas hydrate is gasified instantly in large scale in the mining process. The pressure reduction exploitation method generally adopted in the prior art is that the pressure of a natural gas hydrate reservoir is reduced, so that the phase equilibrium point of the natural gas hydrate is changed, and the natural gas hydrate is decomposed, too much artificial energy does not need to be injected when the natural gas hydrate is exploited in a pressure reduction mode, the required energy is mainly heat flow inside a stratum, the heat is provided only by utilizing the temperature of the stratum due to the fact that no artificial heat source supplies heat, and the speed of exploiting the natural gas hydrate by singly using the pressure reduction method is slow; depressurization is not suitable for natural gas hydrate reservoirs with too low reservoir temperature (close to or lower than 0 ℃), and the main reason is that water may exist in the form of ice at the temperature lower than 0 ℃, and the ice can have certain influence on the gasification of natural gas hydrate and the transportation of gaseous natural gas.
Disclosure of Invention
The invention aims to provide a mining method of deep-sea combustible ice, which is used for solving the problem that the mining speed is low in the traditional mining mode and accelerating the mining of the combustible ice by actively heating and matching with the traditional terrestrial heat.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a method for exploiting deep sea combustible ice comprises the following steps:
s1: installing an offshore drilling platform, installing drilling equipment on the drilling platform, and drilling a well through the drilling equipment;
s2: after the combustible ice layer is drilled, arranging two horizontal wells at certain intervals;
s3: laying an oil pipe at the bottom of the well;
s4: a sleeve is arranged at the wellhead, and vent pipelines are arranged on two sides of the sleeve;
s5: installing an air compressor at a wellhead, connecting an outlet of the air compressor with the casing, and welding and fixing the end part of the oil pipe with the casing;
s6: starting an air compressor to discharge welding slag and dirt generated by welding through an emptying pipeline;
s7: and a heating device is arranged at the air compressor, heat is transferred to a pipeline in the horizontal well through an oil pipe, and the combustible ice is discharged outwards through the oil pipe.
Further, the distance between the horizontal wells is 3-6 meters, and preferably 4 meters.
Further, oil pipe's pipe diameter is 2~3 cun, and oil pipe is the multilayer.
The invention has at least the following beneficial effects:
(1) the mining temperature is increased through active heating, the speed is higher compared with that only depending on the geothermal heat, the heating power and time can be adjusted according to the mining condition, and the stable mining speed is ensured.
(2) The water can not freeze in the pipeline after heating, reduces the influence of ice to pipeline transport.
(3) The pressure is regulated through the pressure regulating tank, so that the influence on the gas volume in exploitation caused by the change of temperature difference in the morning and evening is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Examples
A method for exploiting deep sea combustible ice comprises the following steps:
s1: and installing an offshore drilling platform, installing drilling equipment on the drilling platform, and drilling by the drilling equipment.
S2: after the combustible ice layer is drilled, two horizontal wells are arranged at certain intervals, the interval is 3-6 meters, the interval is preferably 4 meters, and the stability of the vertical well can be improved.
S3: after a certain depth is reached, oil pipes are arranged at the bottom of the well, the pipe diameters of the oil pipes are 2-3 inches, the oil pipes are in a multilayer structure, seawater corrosion can be reduced, the heat preservation effect is achieved, and pipelines which are in contact with the oil pipes but are not communicated with each other are arranged in the horizontal well.
S4: the well head is provided with a sleeve, and vent pipelines are arranged on two sides of the sleeve and used for discharging impurities in pipelines, such as welding slag and the like.
S5: install the air compressor machine at the well head, the discharge capacity of air compressor machine is 3 m/min, and pressure is 20MPa, is connected the export and the sleeve pipe of air compressor machine, and oil pipe's tip and sleeve pipe welded fastening.
S6: and starting an air compressor, opening a vent pipeline, and discharging welding slag and dirt generated by welding through the vent pipeline.
S7: the heating device is installed at the air compressor, heat is transferred to the pipeline in the horizontal well through the oil pipe, the temperature near the oil pipe is improved through the pipeline in the combustible ice layer, the combustible ice expands in heated volume, pressure is increased, and the combustible ice is sprayed out through the oil pipe.
The pressure regulating tank is arranged on the natural gas transmission pipeline, so that fluctuation caused by unstable pressure is avoided.
Claims (3)
1. A method for exploiting deep sea combustible ice is characterized by comprising the following steps: the method comprises the following steps:
s1: installing an offshore drilling platform, installing drilling equipment on the drilling platform, and drilling a well through the drilling equipment;
s2: after the combustible ice layer is drilled, arranging two horizontal wells at certain intervals;
s3: laying an oil pipe at the bottom of the well;
s4: a sleeve is arranged at the wellhead, and vent pipelines are arranged on two sides of the sleeve;
s5: installing an air compressor at a wellhead, connecting an outlet of the air compressor with the casing, and welding and fixing the end part of the oil pipe with the casing;
s6: starting an air compressor to discharge welding slag and dirt generated by welding through an emptying pipeline;
s7: and a heating device is arranged at the air compressor, heat is transferred to a pipeline in the horizontal well through an oil pipe, and the combustible ice is discharged outwards through the oil pipe.
2. The method for exploiting deep sea combustible ice according to claim 1, wherein: the distance between the horizontal wells is 3-6 meters, and preferably 4 meters.
3. The method for exploiting deep sea combustible ice according to claim 1, wherein: the pipe diameter of oil pipe is 2~3 cun, and oil pipe is the multilayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110968829.0A CN113482545A (en) | 2021-08-23 | 2021-08-23 | Mining method of deep-sea combustible ice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110968829.0A CN113482545A (en) | 2021-08-23 | 2021-08-23 | Mining method of deep-sea combustible ice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113482545A true CN113482545A (en) | 2021-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110968829.0A Pending CN113482545A (en) | 2021-08-23 | 2021-08-23 | Mining method of deep-sea combustible ice |
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| CN (1) | CN113482545A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004132A (en) * | 2007-01-04 | 2007-07-25 | 中国石油大学(华东) | Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN103277072A (en) * | 2013-05-16 | 2013-09-04 | 李贤明 | Method and system for exploiting seabed natural gas hydrate |
| CN204327446U (en) * | 2014-12-15 | 2015-05-13 | 山东浩泰天然气股份有限公司 | compressor oil recovering device |
| BR132016009664E2 (en) * | 2016-04-29 | 2018-06-05 | Fmc Technologies Do Brasil Ltda | UNDERWATER CONNECTION EQUIPMENT IN BLOCK ARCHITECTURE AND OIL EXPLORATION SYSTEM |
| CN108625827A (en) * | 2017-09-30 | 2018-10-09 | 杨浩祥 | A kind of sea-bottom shallow combustible ice safe working method |
| CN109356556A (en) * | 2018-11-20 | 2019-02-19 | 中国石油大学(华东) | A kind of recovery method and device of the burning of deep water shallow layer gas hydrate underground |
| CN111734358A (en) * | 2020-06-29 | 2020-10-02 | 陕西工业职业技术学院 | Comprehensive exploitation method for combustible ice in frozen soil area |
| CN111894530A (en) * | 2020-07-30 | 2020-11-06 | 吉林建筑大学 | Seabed combustible ice filling mining device and mining method thereof |
| CN112096353A (en) * | 2019-06-17 | 2020-12-18 | 中国石油天然气股份有限公司 | Emptying device and gas injection system |
-
2021
- 2021-08-23 CN CN202110968829.0A patent/CN113482545A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004132A (en) * | 2007-01-04 | 2007-07-25 | 中国石油大学(华东) | Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| CN102817596A (en) * | 2012-09-05 | 2012-12-12 | 韩中枢 | Ocean combustible ice mining device and method |
| CN103277072A (en) * | 2013-05-16 | 2013-09-04 | 李贤明 | Method and system for exploiting seabed natural gas hydrate |
| CN204327446U (en) * | 2014-12-15 | 2015-05-13 | 山东浩泰天然气股份有限公司 | compressor oil recovering device |
| BR132016009664E2 (en) * | 2016-04-29 | 2018-06-05 | Fmc Technologies Do Brasil Ltda | UNDERWATER CONNECTION EQUIPMENT IN BLOCK ARCHITECTURE AND OIL EXPLORATION SYSTEM |
| CN108625827A (en) * | 2017-09-30 | 2018-10-09 | 杨浩祥 | A kind of sea-bottom shallow combustible ice safe working method |
| CN109356556A (en) * | 2018-11-20 | 2019-02-19 | 中国石油大学(华东) | A kind of recovery method and device of the burning of deep water shallow layer gas hydrate underground |
| CN112096353A (en) * | 2019-06-17 | 2020-12-18 | 中国石油天然气股份有限公司 | Emptying device and gas injection system |
| CN111734358A (en) * | 2020-06-29 | 2020-10-02 | 陕西工业职业技术学院 | Comprehensive exploitation method for combustible ice in frozen soil area |
| CN111894530A (en) * | 2020-07-30 | 2020-11-06 | 吉林建筑大学 | Seabed combustible ice filling mining device and mining method thereof |
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Application publication date: 20211008 |