CN112196500B - Discharging and blockage removing device in natural gas hydrate and petroleum and natural gas exploitation well - Google Patents
Discharging and blockage removing device in natural gas hydrate and petroleum and natural gas exploitation well Download PDFInfo
- Publication number
- CN112196500B CN112196500B CN202010923230.0A CN202010923230A CN112196500B CN 112196500 B CN112196500 B CN 112196500B CN 202010923230 A CN202010923230 A CN 202010923230A CN 112196500 B CN112196500 B CN 112196500B
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- discharge electrode
- reflector
- natural gas
- flange plate
- insulating flange
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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
- E21B43/01—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
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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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/03—Freeing by flushing
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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
Abstract
The invention provides a natural gas hydrate and petroleum and gas exploitation in-well discharging and blockage removing device, which comprises: the upper insulating flange and the lower insulating flange are arranged oppositely up and down; the upper end of the discharge electrode is connected with the upper insulating flange plate, and the lower end of the discharge electrode is connected with the lower insulating flange plate; the upper insulating reflector and the lower insulating reflector are used for reflecting hydraulic shock waves generated around the discharge electrode and forming a fluctuation effect, and clogging of the filter pipe column is eliminated. The invention has the beneficial effects that: the upper insulating reflector and the lower insulating reflector reflect the hydraulic shock waves to form a fluctuation effect, so that the clogging of the filtering pipe column is eliminated, a fracture network is formed in a near-wellbore area, the permeability of a reservoir is improved, and good conditions are created for improving the yield of the reservoir.
Description
Technical Field
The invention relates to the technical field of development of natural gas hydrate and petroleum and natural gas, in particular to a discharging and plugging removing device in a natural gas hydrate and petroleum and natural gas exploitation well.
Background
In the process of exploiting natural gas hydrate and petroleum and natural gas, because oil and gas production in a reservoir is generally accompanied by phenomena of sand production, mud production and the like, the clogging of the filter pipe column hole and the blocking of the stratum around the well wall are caused, and further the problems of unsmooth oil (gas) flow, sand production and mud production in a production layer, the clogging of the filter pipe hole and the like in the exploitation process are caused, so that the technical problems of exploitation blockage, yield reduction and the like are caused. At present, aiming at the problems in the mining process, the problems of filter column hole silting, formation blockage around a well and the like are generally solved through an acidification chemistry and fracturing method in China. The chemical blockage removal and yield increase method has complex implementation process, dangerous chemical storage and transportation, long operation time and ecological problems (such as underground water pollution) which restrict the wide application of the method. The fracturing blockage removal and yield increase method has complex operation process, brings serious underground water pollution and greatly limits the use of the traditional hydraulic fracturing blockage removal method.
Disclosure of Invention
In view of the above, in order to solve the problems of unsmooth oil (gas) flow, sand and mud production from a production layer, clogging of filter pipe orifices and the like in the exploitation process caused by clogging of filter pipe column orifices and blocking of strata around a well wall in the exploitation process of natural gas hydrate and petroleum and natural gas, the embodiment of the invention provides a discharge unblocking device in a natural gas hydrate and petroleum and natural gas exploitation well.
The embodiment of the invention provides a device for removing blockage by discharging in a natural gas hydrate and oil and gas exploitation well, which comprises:
the upper insulating flange and the lower insulating flange are arranged oppositely up and down;
the upper end of the discharge electrode is connected with the upper insulating flange plate, and the lower end of the discharge electrode is connected with the lower insulating flange plate;
the upper insulating reflector and the lower insulating reflector are used for reflecting hydraulic shock waves generated around the discharge electrode and forming a fluctuation effect, so that clogging of a filter pipe column is eliminated, a fracture network is formed in a near-wellbore area, and the permeability of a reservoir stratum is improved.
Furthermore, an upward concave arc-shaped upper reflecting surface is arranged at the lower part of the upper insulating reflector, a downward concave arc-shaped lower reflecting surface is arranged at the upper part of the lower insulating reflector, and the upper reflecting surface and the lower reflecting surface are arranged oppositely from top to bottom.
Further, the discharge electrode is disposed on a connecting line between the center of the upper reflecting surface and the center of the lower reflecting surface.
Furthermore, the upper insulating reflector is arranged above the upper insulating flange plate, the lower part of the upper insulating reflector is fixedly connected with the upper insulating flange plate, and the lower insulating reflector is arranged below the lower insulating flange plate, and the upper part of the lower insulating reflector is fixedly connected with the lower insulating flange plate.
Furthermore, the discharge electrode is a cylindrical electrode, the lower end of the discharge electrode is fixedly connected with the lower insulating flange, and the upper end of the discharge electrode penetrates through the upper insulating flange and the upper insulating reflector and is connected with a cable joint.
Further, the cable joint is connected with an adjustable power supply.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
(1) the power is supplied by the discharge electrode, hydraulic shock waves and high pressure are generated between the discharge electrode and the filtering pipe column, the upper insulating reflector and the lower insulating reflector reflect the hydraulic shock waves to form a fluctuation effect, the clogging of the filtering pipe column is eliminated, a fracture network is formed in a near-wellbore area, the permeability of a reservoir is improved, and therefore good conditions are created for improving the yield of the reservoir.
(2) Through adjusting external power supply input parameter, can carry out regulation control to the shock wave that discharges and produce, and then dredge silt and remove stifled to the filtration tubular column punchhole silt up of difference and the near wellbore area jam condition well, consequently can adapt to various exploitation well conditions well, the device easily keeps the centering state, and in the use, the design distance of discharge electrode and filtration tubular column inner wall can remain unchanged, discharge electrode length also can remain unchanged, thereby keep stable water conservancy shock wave effect, power input control is convenient, system architecture is simple reliable, convenient operation, and can be repeatedly used.
(3) The method is suitable for dredging and unblocking in exploitation of natural gas hydrates and oil and gas wells, and has important economic and social benefits for exploration and development of unconventional natural gas hydrate resources and conventional oil and gas resources in China;
(4) the device can also be used for scientific experiments and researches on dredging and blocking removing of the gas hydrate and the oil and gas well in related research institutes, and provides a device and technical service for dredging and blocking removing of the gas hydrate and the oil and gas well in related enterprises and research institutes of oil drilling and geological exploration.
Drawings
FIG. 1 is a schematic diagram of a discharging and plugging removing device in a natural gas hydrate and oil and gas exploitation well.
In the figure: 1-upper insulating flange, 2-lower insulating flange, 3-upper insulating reflector, 4-lower insulating reflector, 5-discharge electrode, 6-upper reflecting surface, 7-lower reflecting surface and 8-cable joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a device for removing a blockage by discharging in a gas hydrate and oil and gas exploitation well, including an upper insulating flange 1, a lower insulating flange 2, a discharge electrode 5, an upper insulating reflector 3, and a lower insulating reflector 4.
Specifically, the upper insulating flange plate 1 and the lower insulating flange plate 2 are identical in structure and are arranged oppositely from top to bottom, and the upper insulating flange plate 1 is located above the lower insulating flange plate 2.
The discharge electrode 5 is arranged between the upper insulating flange plate 1 and the lower insulating flange plate 2, the upper end of the discharge electrode 5 is connected with the upper insulating flange plate 1, and the lower end of the discharge electrode 5 is connected with the lower insulating flange plate 2. Here, the discharge electrode 5 is a cylindrical electrode, and the discharge electrode 5 is disposed perpendicular to the upper insulating flange 1 and the lower insulating flange 2.
The upper insulating reflector 3 is arranged at the upper end of the discharge electrode 5, the lower insulating reflector 4 is arranged at the lower end of the discharge electrode 5, and the lower insulating reflector 4 and the upper insulating reflector 3 are arranged in a vertically opposite mode. Here, the upper insulating reflector 3 is disposed above the upper insulating flange 1 and has a lower portion fixedly connected to the upper insulating flange 1, and the lower insulating reflector 4 is disposed below the lower insulating flange 2 and has an upper portion fixedly connected to the lower insulating flange 2.
Further, the upper insulating reflector 3 and the lower insulating reflector 4 have the same structure, an upwardly concave arc-shaped upper reflecting surface 6 is arranged at the lower part of the upper insulating reflector 3, a downwardly concave arc-shaped lower reflecting surface 7 is arranged at the upper part of the lower insulating reflector 4, and the upper reflecting surface 6 and the lower reflecting surface 7 are arranged in an up-and-down opposite manner. The discharge electrode 5 is disposed on a line connecting the center of the upper reflecting surface 6 and the center of the lower reflecting surface 7. The lower end of the discharge electrode 5 is fixedly connected with the center of the lower insulating flange 2, and the upper end of the discharge electrode 5 penetrates through the center of the upper insulating flange 1 and the center of the upper insulating reflector 3 and is connected with a cable joint 8. Under the installation condition, the device can be kept in a centering state in the working process, the discharge electrode 5 is kept not to be in contact with the filtering pipe column, the design distance between the discharge electrode 5 and the inner wall of the filtering pipe column is kept unchanged, the length of the discharge electrode 5 is kept unchanged, and the hydraulic shock wave is kept unchanged, so that a better shock damage effect is formed on the clogging of the filtering pipe column.
The cable joint 8 is used for connecting an external power supply and supplying power to the discharge electrode 5 through the external power supply. The external power supply is preferably an adjustable power supply, and the shock wave generated by discharge can be adjusted and controlled by adjusting the input parameters of the external power supply, so that the dredging and blockage relieving are well performed according to different situations of filtration pipe column hole blockage and near-wellbore zone blockage, and the method can be well suitable for various production well conditions.
The use method of the discharging and blockage removing device in the natural gas hydrate and oil and gas exploitation well comprises the following steps: the device is lowered to a reservoir treatment part in a natural gas hydrate and oil and gas well through a cable, an external power supply supplies power to the discharge electrode 5, arc discharge is formed between the discharge electrode 5 (positive potential) and the filtering pipe column and between the discharge electrode 5 and a production layer (negative potential), hydraulic shock waves and high pressure are generated, the upper insulating reflector 3 and the lower insulating reflector 4 reflect the hydraulic shock waves to form a fluctuation effect, clogging of the filtering pipe column is eliminated, a fracture network is formed in a near-wellbore area, the permeability of the reservoir is improved, and therefore good conditions are created for improving the yield of the reservoir. In addition, the shock wave generated by discharge can be adjusted and controlled by adjusting the input parameters of the external power supply so as to adapt to various production well conditions.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a gas hydrate removes stifled device with discharging in oil and gas exploitation well which characterized in that includes:
the upper insulating flange and the lower insulating flange are arranged oppositely up and down;
the upper end of the discharge electrode is connected with the upper insulating flange plate, and the lower end of the discharge electrode is connected with the lower insulating flange plate;
the upper insulating reflector and the lower insulating reflector are used for reflecting hydraulic shock waves generated around the discharge electrode and forming a fluctuation effect, clogging of a filter pipe column is eliminated, a fracture network is formed in a near-well area, and permeability of a reservoir is improved.
2. The discharging and plugging removing device for the natural gas hydrate and oil and gas exploitation well as claimed in claim 1, wherein: the discharge electrode is arranged on a connecting line of the center of the upper reflecting surface and the center of the lower reflecting surface.
3. The discharging and plugging removing device for the natural gas hydrate and oil and gas exploitation well as claimed in claim 1, wherein: the upper insulating reflector is arranged above the upper insulating flange plate, the lower part of the upper insulating reflector is fixedly connected with the upper insulating flange plate, and the lower insulating reflector is arranged below the lower insulating flange plate, and the upper part of the lower insulating reflector is fixedly connected with the lower insulating flange plate.
4. The discharging and plugging removing device for the natural gas hydrate and oil and gas exploitation well as claimed in claim 1, wherein: the discharge electrode is a cylindrical electrode, the lower end of the discharge electrode is fixedly connected with the lower insulating flange plate, and the upper end of the discharge electrode penetrates through the upper insulating flange plate and the upper insulating reflector and is connected with a cable joint.
5. The discharging and plugging removing device for the natural gas hydrate and oil and gas exploitation well as claimed in claim 4, wherein: the cable joint is connected with an adjustable power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923230.0A CN112196500B (en) | 2020-09-04 | 2020-09-04 | Discharging and blockage removing device in natural gas hydrate and petroleum and natural gas exploitation well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923230.0A CN112196500B (en) | 2020-09-04 | 2020-09-04 | Discharging and blockage removing device in natural gas hydrate and petroleum and natural gas exploitation well |
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| Publication Number | Publication Date |
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| CN112196500A CN112196500A (en) | 2021-01-08 |
| CN112196500B true CN112196500B (en) | 2021-07-16 |
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| CN202010923230.0A Active CN112196500B (en) | 2020-09-04 | 2020-09-04 | Discharging and blockage removing device in natural gas hydrate and petroleum and natural gas exploitation well |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012249A1 (en) * | 2001-07-30 | 2003-02-13 | Viktor Sergeevich Podobed | Device for the acoustic action on a oil and gas-bearing formation |
| DE102005056904A1 (en) * | 2005-11-29 | 2007-05-31 | Switech Medical Ag | Shock wave producer, has parabolic reflector arranged such that it transforms shock waves generated by shock wave generator into parallel shockwaves, which are radiated parallely from generator |
| CN104692604A (en) * | 2015-03-20 | 2015-06-10 | 东北大学 | Device using high-voltage pulsed discharge to break excess sludge and application method thereof |
| CN106540871A (en) * | 2016-12-26 | 2017-03-29 | 哈尔滨理工大学 | A kind of pulse electro discharge electrode for de-plugging of well |
| CN106761646A (en) * | 2016-12-30 | 2017-05-31 | 北京百恒达石油技术有限公司 | Shock wave makes seam apparatus and system |
| CN207437047U (en) * | 2017-11-20 | 2018-06-01 | 延长油田股份有限公司 | A kind of oil field cumulative highpowerpulse generation device |
| CN210164466U (en) * | 2019-03-20 | 2020-03-20 | 南京帕尔斯电气科技有限公司 | Special high-energy-gathering electric pulse blockage removing electrode mechanism for oil and gas exploitation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX363840B (en) * | 2013-04-30 | 2019-04-03 | Ventora Tech Ag | Device for cleaning water wells. |
-
2020
- 2020-09-04 CN CN202010923230.0A patent/CN112196500B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003012249A1 (en) * | 2001-07-30 | 2003-02-13 | Viktor Sergeevich Podobed | Device for the acoustic action on a oil and gas-bearing formation |
| DE102005056904A1 (en) * | 2005-11-29 | 2007-05-31 | Switech Medical Ag | Shock wave producer, has parabolic reflector arranged such that it transforms shock waves generated by shock wave generator into parallel shockwaves, which are radiated parallely from generator |
| CN104692604A (en) * | 2015-03-20 | 2015-06-10 | 东北大学 | Device using high-voltage pulsed discharge to break excess sludge and application method thereof |
| CN106540871A (en) * | 2016-12-26 | 2017-03-29 | 哈尔滨理工大学 | A kind of pulse electro discharge electrode for de-plugging of well |
| CN106761646A (en) * | 2016-12-30 | 2017-05-31 | 北京百恒达石油技术有限公司 | Shock wave makes seam apparatus and system |
| CN207437047U (en) * | 2017-11-20 | 2018-06-01 | 延长油田股份有限公司 | A kind of oil field cumulative highpowerpulse generation device |
| CN210164466U (en) * | 2019-03-20 | 2020-03-20 | 南京帕尔斯电气科技有限公司 | Special high-energy-gathering electric pulse blockage removing electrode mechanism for oil and gas exploitation |
Non-Patent Citations (1)
| Title |
|---|
| 一种用于油水井解堵增油的高压电脉冲源;孙鹞鸿等;《钻采工艺》;20001231;第23卷(第5期);45-47 * |
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| CN112196500A (en) | 2021-01-08 |
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