CN108150136B - In-situ combustion well bore combustion preventing fire extinguishing tail pipe and application thereof - Google Patents
In-situ combustion well bore combustion preventing fire extinguishing tail pipe and application thereof Download PDFInfo
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- CN108150136B CN108150136B CN201711129385.1A CN201711129385A CN108150136B CN 108150136 B CN108150136 B CN 108150136B CN 201711129385 A CN201711129385 A CN 201711129385A CN 108150136 B CN108150136 B CN 108150136B
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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
- E21B35/00—Methods or apparatus for preventing or extinguishing fires
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
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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
- 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
- E21B43/243—Combustion in situ
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Abstract
The invention provides a fire extinguishing tail pipe for preventing shaft combustion in-situ combustion and application thereof. The fire extinguishing tail pipe comprises a first oil pipe and a second oil pipe which are connected in series from top to bottom; the top end of the first oil pipe is provided with an upper sealing material (a sealing pressure relief valve), the bottom end of the first oil pipe is connected with the top end of the second oil pipe in a sealing manner through a middle sealing material, and the bottom end of the second oil pipe is an oil pipe sealing end; in addition, the ABC dry powder extinguishing agent is filled in the first oil pipe, and the magnesium carbonate solid is filled in the second oil pipe; the upper sealing material is made of a metal material with a melting point of 660 ℃, and the middle sealing material is made of a metal material with a melting point of 600 ℃. When the shaft is violently burnt, the fire extinguishing tail pipe can release a large amount of flame retardant gas, control the fire behavior and protect the test equipment and the casing pipe.
Description
Technical Field
The invention relates to a fire extinguishing tail pipe for preventing shaft combustion in-situ combustion and application thereof.
Background
The in-situ combustion technology is also called fire flooding, and is an exploitation technology capable of greatly improving the recovery ratio of a heavy oil reservoir, and is mainly characterized in that heavy components in stratum crude oil are used as fuel, air or oxygen-enriched gas is used as combustion improver, methods such as spontaneous combustion and artificial ignition are adopted to enable the temperature of the oil reservoir to reach the ignition point of the crude oil, the combustion improver is continuously injected, the crude oil in the oil reservoir is continuously combusted, a large amount of heat is generated by combustion reaction, the oil reservoir is heated, the temperature of the oil reservoir rises to 600-700 ℃, the heavy components are cracked at high temperature, and the injected gas, light oil generated by cracking of heavy oil, gas generated by combustion and water vapor are used for driving the crude oil to flow to a production well and are exploited from the production well.
At present, key technical researches on in-situ combustion mainly focus on: ignition method, well completion method, tracing method, monitoring method, produced gas treatment, auxiliary exploitation, profile control plugging, indoor simulation and the like. The safety production plan also runs through each production link, but some non-artificial unpredictable safety hazards always influence the normal implementation of the technology, such as the steam channeling of an adjacent well before ignition causes the temperature of the well to rise and oxidize and burn, oil return of an oil layer causes combustion in a well barrel, and the like. Once the temperature of the shaft is too high and is not processed in time, a light person may damage the testing equipment, and a heavy person may burn out the casing and the well cementation cement, so that the production well is scrapped.
In the prior art, an in-situ combustion high temperature resistant instrument can generally resist the instantaneous temperature up to 800 ℃, the safety temperature resistance is generally not more than 600 ℃, and the bottom temperature is required to be controlled below 600 ℃ for the purpose of protecting test equipment and an oil well. Some wells also require steam to preheat the formation at an earlier stage, and the downhole ambient temperature can sometimes reach 300 ℃. Due to the influence of complex factors such as underground high temperature, high pressure and the like, the general fire extinguishing concept, equipment and medicament composition available on the ground cannot adapt to the requirements. The fire extinguishing rod arranged outside the pipe column is limited by size, the charge dosage is generally less, the fire extinguishing rod only can play a role in early warning or initial fire extinguishing, and the action is less when the fire is great. Fire extinguishing processes such as water injection, nitrogen injection, or carbon dioxide injection require a certain amount of time to prepare.
Through inspection, no relevant report of a simple and effective fire extinguishing technology for preventing shaft combustion in-situ combustion is found.
Disclosure of Invention
One purpose of the invention is to develop a fire extinguishing tail pipe for preventing shaft burning in-situ combustion, and protecting test equipment and a sleeve.
Another object of the invention is to provide a method for using the inventive fire liner for in-situ combustion of a well bore, for protecting test equipment and casings.
In one aspect, the invention provides a fire extinguishing tail pipe for preventing shaft combustion in-situ combustion, which comprises a first oil pipe and a second oil pipe which are connected in series up and down; the top end of the first oil pipe is provided with an upper sealing material (a sealing anti-pressure valve), the bottom end of the first oil pipe is connected with the top end of the second oil pipe in a sealing manner through a middle sealing material, and the bottom end of the second oil pipe is an oil pipe sealing end; in addition, the ABC dry powder extinguishing agent is filled in the first oil pipe, and the magnesium carbonate solid is filled in the second oil pipe; the upper sealing material is made of a metal material with a melting point of 660 ℃, and the middle sealing material is made of a metal material with a melting point of 600 ℃.
According to a specific embodiment of the invention, the total length of the fire extinguishing liner can be determined according to the length of the well pocket, generally 10-80 meters. The upper oil pipe and the lower oil pipe (the first oil pipe and the second oil pipe) can be equal in length or unequal in length.
According to a specific embodiment of the present invention, the ABC dry powder fire extinguishing agent may include one or more of sodium bicarbonate dry powder, modified sodium salt dry powder, potassium salt dry powder, ammonium dihydrogen phosphate dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder and amino dry powder fire extinguishing agent. The loading is typically 0.03 cubic meters per meter of oil pipe.
According to a specific embodiment of the invention, the second oil pipe is filled with magnesium carbonate solids at a loading of 0.03 cubic meters per meter of oil pipe.
According to a specific embodiment of the present invention, the upper sealing material may be, for example, metallic aluminum (melting point 660 ℃).
According to a specific embodiment of the present invention, the intermediate sealing material may be, for example, an aluminum alloy (melting point 600 ℃).
According to the specific embodiment of the invention, the contact surface of the sealing material and the oil pipe can be coated with organic silicon high-temperature resistant paint or other high-temperature resistant screw thread oil to prevent premature failure of the seal caused by electrochemical reaction.
The tail pipe is installed at the bottom of the sieve pipe and is arranged at the bottom of the well when in use. When the bottom temperature reaches 540 ℃, the magnesium carbonate solid is decomposed to release carbon dioxide, and the interior of the oil pipe is pressurized; when the bottom temperature reaches 600 ℃, the middle seal is melted and untied, and the whole oil pipe is pressurized; when the bottom temperature reaches 660 ℃, the upper seal is melted and released, and carbon dioxide in the oil pipe is sprayed into the upper sieve pipe under pressure and rushes into the shaft to control the fire of the shaft.
Thus, the invention also provides a method for using the fire extinguishing tail pipe of the invention in oil-burning for preventing the combustion of the shaft, which comprises installing the fire extinguishing tail pipe of the invention at the bottom of the sieve pipe and arranging the fire extinguishing tail pipe at the bottom of the well.
The technology of the invention is suitable for the normal environment temperature of the oil well shaft below 400 ℃, when the combustion temperature of the oil well reaches above 600 ℃ (the ignition temperature of the oil well is generally lower than 550 ℃, the fire extinguishing tail pipe is not damaged under the normal condition and can be recycled), the fire extinguishing tail pipe is sealed and melted, the built-in chemical agent releases a large amount of carbon dioxide foam, the time is taken for the forced fire extinguishing procedures of water injection, nitrogen injection or carbon dioxide injection, the testing equipment and the casing pipe are protected, and the safe production is ensured.
The invention has the beneficial effects that:
(1) the design is simple, and the preparation is convenient.
(2) The packaging amount is large, and the fire extinguishing effect is good.
(3) The disposal is timely, and the production is guaranteed.
Drawings
Fig. 1 is a schematic view of a fire extinguishing liner. In the figure, 1-sealing pressure relief valve, 2-oil pipe A, 3-middle sealing and 4-oil pipe B.
Detailed Description
The following examples are presented to illustrate the practice and application of the present technology, but are not intended to limit the scope of the present invention.
Example 1
Referring to fig. 1, a schematic structural diagram of a fire extinguishing tail pipe for preventing combustion in a combustion chamber in a fire is shown. As shown in the figure, the fire extinguishing tail pipe comprises a first oil pipe (oil pipe A)2 and a second oil pipe (oil pipe B)4 which are connected in series up and down; the top end of the first oil pipe 2 is provided with an upper sealing material (a sealing anti-pressure valve) 1, the bottom end of the first oil pipe 2 is hermetically connected with the top end of the second oil pipe 4 through a middle sealing material 3, and the bottom end of the second oil pipe 4 is an oil pipe sealing end; in addition, ABC dry powder extinguishing agents (such as sodium bicarbonate dry powder, modified sodium salt dry powder, potassium salt dry powder, ammonium dihydrogen phosphate dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder and amino dry powder for extinguishing fire) are filled in the first oil pipe 2, and the filling amount is 0.03 cubic meter per meter of oil pipe; magnesium carbonate solid is filled in the second oil pipe, and the filling amount is 0.03 cubic meter per meter of oil pipe; the upper sealing material is made of a metal aluminum material with a melting point of 660 ℃, the middle sealing material is made of a metal alloy aluminum material with a melting point of 600 ℃, and the contact surface of the sealing material and the oil pipe is coated with organic silicon high-temperature-resistant paint or other high-temperature-resistant screw thread oil to prevent premature sealing failure caused by electrochemical reaction.
And determining the total length of the adopted oil pipe according to the length of the oil well pocket.
When the bottom temperature reaches 540 ℃, the magnesium carbonate solid is decomposed to release carbon dioxide, and the inside of the oil pipe is pressurized.
When the bottom temperature reaches 600 ℃, the middle seal is melted and untied, the whole oil pipe is pressurized,
when the bottom temperature reaches 660 ℃, the upper seal is melted and released, and carbon dioxide in the oil pipe is sprayed into the upper sieve pipe under pressure and rushes into the shaft to control the fire of the shaft.
The ground determines that the shaft is on fire by means of the temperature trend displayed by the temperature probe, so that time is won for preparing corresponding safety measures in the next step, and production is guaranteed.
Finally, the description is as follows: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover any modifications or equivalents as may fall within the scope of the invention.
Claims (2)
1. A method for preventing the combustion of well bore in-situ combustion includes installing a fire-extinguishing tail pipe at the bottom of sieve tube and setting it at bottom of well;
the fire extinguishing tail pipe comprises a first oil pipe and a second oil pipe which are connected in series from top to bottom; the top end of the first oil pipe is an upper sealing material to form a sealed pressure relief valve, the bottom end of the first oil pipe is connected with the top end of the second oil pipe in a sealing mode through a middle sealing material, and the bottom end of the second oil pipe is an oil pipe sealing end; in addition, the ABC dry powder extinguishing agent is filled in the first oil pipe, and the filling amount is 0.03 cubic meter per meter of oil pipe; magnesium carbonate solid is filled in the second oil pipe, and the filling amount is 0.03 cubic meter per meter of oil pipe; the upper sealing material is made of metal aluminum with a melting point of 660 ℃, and the middle sealing material is made of alloy aluminum with a melting point of 600 ℃; the ABC dry powder extinguishing agent comprises one or more of sodium bicarbonate dry powder, modified sodium salt dry powder, potassium salt dry powder, ammonium dihydrogen phosphate dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder and amino dry powder extinguishing agent;
when the bottom temperature reaches 540 ℃, the magnesium carbonate solid is decomposed to release carbon dioxide, and the interior of the oil pipe is pressurized; when the bottom temperature reaches 600 ℃, the middle seal is melted and untied, and the whole oil pipe is pressurized; when the bottom temperature reaches 660 ℃, the upper seal is melted and released, and carbon dioxide in the oil pipe is sprayed into the upper sieve pipe under pressure and rushes into the shaft to control the fire of the shaft.
2. The in situ combustion wellbore combustion prevention method of claim 1 wherein the total length of the fire liner is 10-80 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711129385.1A CN108150136B (en) | 2017-11-15 | 2017-11-15 | In-situ combustion well bore combustion preventing fire extinguishing tail pipe and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711129385.1A CN108150136B (en) | 2017-11-15 | 2017-11-15 | In-situ combustion well bore combustion preventing fire extinguishing tail pipe and application thereof |
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| Publication Number | Publication Date |
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| CN108150136A CN108150136A (en) | 2018-06-12 |
| CN108150136B true CN108150136B (en) | 2020-11-06 |
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| CN201711129385.1A Active CN108150136B (en) | 2017-11-15 | 2017-11-15 | In-situ combustion well bore combustion preventing fire extinguishing tail pipe and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111544807B (en) * | 2020-04-03 | 2021-08-20 | 何希良 | Fire extinguisher and filling method thereof |
| CN112691313B (en) * | 2021-01-07 | 2022-05-06 | 延安华宇油气工程技术有限公司 | Ignition treatment equipment for out-of-control blowout of oil exploitation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2235301Y (en) * | 1995-04-29 | 1996-09-18 | 吕文杰 | Stationarily-arranged fire-fighting block |
| CN101596343B (en) * | 2009-07-10 | 2012-06-20 | 青岛中阳消防科技有限公司 | Suspended type ultrafine dry powder extinguishing installation |
| CN201823202U (en) * | 2010-09-29 | 2011-05-11 | 新汶矿业集团有限责任公司翟镇煤矿 | Safe throwing type self-explored dry powder fire extinguisher |
| CN102247679B (en) * | 2011-04-02 | 2013-04-17 | 国安达消防科技(厦门)有限公司 | Non-pressure storing automatic fire extinguishing device |
| CN203175488U (en) * | 2013-01-18 | 2013-09-04 | 刘镇宇 | Oil well fire extinguishing bomb |
| CN106013706B (en) * | 2016-07-07 | 2018-05-22 | 安徽国风木塑科技有限公司 | A kind of Wood-plastic floor of energy fireproof fire-extinguishing |
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