CN209742861U - Geothermal and oil gas co-production system in oil or natural gas exploitation - Google Patents
Geothermal and oil gas co-production system in oil or natural gas exploitation Download PDFInfo
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- CN209742861U CN209742861U CN201920529079.5U CN201920529079U CN209742861U CN 209742861 U CN209742861 U CN 209742861U CN 201920529079 U CN201920529079 U CN 201920529079U CN 209742861 U CN209742861 U CN 209742861U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model provides a geothermal and oil gas co-production system in oil or natural gas exploitation, which comprises a shaft, a sleeve, a gravity heat pipe heat exchanger condensation section, a conveying pipe and a packer, wherein the shaft is formed after drilling and is led to the deep part of a stratum, the sleeve is put into the shaft, the gravity heat pipe heat exchanger condensation section is butted with the top end of the sleeve, the conveying pipe penetrates through the sleeve and the gravity heat pipe heat exchanger, and a heat-conducting cement ring and a heat-insulating cement ring are respectively arranged on the outer wall of the sleeve and in the shaft; setting a packer in a casing above an oil layer or a gas layer, and perforating and fracturing the casing below the packer to the oil layer or the gas layer to be used as a production channel; the bottom end of the conveying pipe extends into an oil layer or a gas layer, and the upper end of the conveying pipe extends out of the gravity heat pipe heat exchanger; perforating a through hole from the casing to a rock stratum corresponding to the heat insulation cement ring section above the packer to form a heat conduction band, fracturing from the through hole and injecting heat conduction filler; a short pipe is put into the through hole and the through hole is sealed by expanding the pipe; and the condensing section of the gravity heat pipe heat exchanger is arranged at the upper end of the sleeve.
Description
Technical Field
The utility model relates to an energy development technical field specifically indicates a system is adopted with oil gas to geothermol power in oil or natural gas exploitation altogether.
Background
The energy industry is the basic industry of national economy, is the material foundation for realizing the modernization, and all countries in the world use the establishment of a reliable, safe and stable energy supply guarantee system as one of the strategic problems of the national economy.
Geothermal resources are pollution-free clean renewable energy sources, and at present, only the geothermal utilization of the middle and deep layers of the earth surface needs to be carried out by drilling, casing, well cementation, heat extraction and heat exchange to form a geothermal well capable of extracting and utilizing heat.
Oil and natural gas are used as important strategic materials for national civilization and national economic safety, the development, production and utilization technology of China is very mature, and produced and developed oil wells and natural gas wells are distributed all over the country.
The depth of the oil and gas wells is generally 1000-7000 meters underground, and underground rock strata have a large amount of geothermal energy, so that the temperature is high and the reserve is huge; for production, deep wells have been formed for oil and gas, which are generally discharged from a pipe in a casing, and the annular space between the casing and the discharge pipe of an oil and gas well is unused during the production of oil and gas. Oil wells and natural gas wells have single exploitation function and are too limited to exploit resources.
disclosure of Invention
the utility model discloses aim at solving prior art's defect, provide a geothermol power and oil gas system of adopting altogether in oil or natural gas exploitation.
The technical scheme of the utility model as follows:
a geothermal and oil-gas co-production system in oil or natural gas exploitation comprises a shaft which is formed to be led to the deep part of a stratum after drilling, a casing which is arranged in the shaft in a downward mode, a gravity heat pipe heat exchanger condensation section which is in butt joint with the top end of the casing, a conveying pipe which penetrates through the casing and the gravity heat pipe heat exchanger, and a packer, wherein a heat-conducting cement sheath and a heat-insulating cement sheath are respectively arranged on the outer wall of the casing and in the shaft from bottom to top for well cementation; setting a packer in the casing above the oil layer or the gas layer to separate oil and gas from the upper space, and perforating the oil layer or the gas layer in the casing below the packer to serve as a production channel; the bottom end of the conveying pipe extends into an oil layer or a gas layer, and the upper end of the conveying pipe extends out of the condensing section of the gravity heat pipe heat exchanger; perforating a through hole from the casing to a rock stratum corresponding to the heat insulation cement ring section above the packer to form a heat conduction band, fracturing from the through hole and injecting heat conduction filler; a short pipe is put into the through hole and the through hole is sealed by expanding the pipe; the condensing section of the gravity heat pipe heat exchanger is arranged at the upper end of the sleeve, and the sleeve and the shell which is in butt joint with the sleeve are jointly used as the shell pass of the gravity heat pipe heat exchanger.
The device also comprises an adjusting pipe, the bottom end of the adjusting pipe penetrates through the packer and extends into an oil layer, and the upper end of the adjusting pipe penetrates out of the condensing section of the gravity heat pipe heat exchanger and is provided with a valve.
The sleeve corresponding to the heat-conducting cement ring section is an evaporation section of the gravity heat pipe heat exchanger, the sleeve corresponding to the heat-insulating cement ring section is a heat-insulating section of the gravity heat pipe heat exchanger, the condensing section comprises a shell and a spiral plate, the spiral plate is arranged in the shell, the vertical spiral plate is arranged in the shell of the condensing section of the gravity heat pipe heat exchanger and is used as a tube side of the gravity heat pipe heat exchanger, a sleeve and the shell connected with the sleeve are used as a shell side of the gravity heat pipe heat exchanger, the interior of the spiral plate is hollow, an output pipe is arranged at the central position of the spiral plate along the axial direction of the spiral plate, the upper end of the output pipe penetrates through the top end of the shell and extends outwards, the output pipe is communicated with the central end of the spiral plate, the peripheral end of the spiral plate is provided with a transverse input pipe, one end of the input pipe is communicated with the peripheral end of the spiral plate, and the other end of the input pipe penetrates through the side wall of the shell and extends outwards; a communicating pipe is also arranged on the side wall of the shell.
the beneficial effects of the utility model reside in that:
1. Except adopting newly-built oil well, natural gas well during the construction the utility model discloses the system the design, realize that geothermol power and oil or natural gas adopt altogether, can also reform transform established or discarded oil well, natural gas well, set up the heat conduction area in the stratum high temperature section of oil well, natural gas well established promptly, go into packer and nozzle stub under, realize geothermol power and oil or natural gas and adopt altogether.
2. the utility model discloses owing to set up heat conduction cement sheath and heat conduction area at stratum high temperature section, the liquid working medium that makes packer upper portion be located between inside pipe wall and the conveying pipe outer wall can absorb the heat of high temperature rock stratum in the stratum fast and be heated the evaporation, and stratum low temperature section sets up thermal-insulated cement sheath and can avoid the steam calorific loss that rises.
3. The utility model discloses a communicating pipe carries out the evacuation to the space on packer upper portion, the liquid working medium on packer upper portion is heated and is generated steam and rise heat transfer, steam is heat transfer fast in vacuum space, heat transfer efficiency can reach more than 95%, thereby realize that the heat is fast from the transmission of stratum high temperature section to gravity heat pipe exchanger, make the space between packer upper portion sleeve pipe and the conveyer pipe keep the high temperature state always, guarantee that output tube upper portion oil or natural gas temperature do not reduce, prevent that oil or natural gas in the output tube from rising the in-process and leading to the wax deposition because of the temperature reduction, the scale deposit is stopped up, improve the production well output and the production efficiency of equipment, but the gravity heat pipe exchanger utilizes geothermol power to carry out the heat transfer to the object that needs.
Drawings
FIG. 1 is a schematic diagram of a production well structure according to the present invention;
FIG. 2 is a top view of a gravity heat pipe heat exchanger;
the numbers and corresponding structure names in the figure are as follows:
1-casing pipe, 2-production channel, 3-heat conducting belt, 4-short pipe, 5-through hole, 6-conveying pipe, 7-packer, 8-adjusting pipe, 9-valve, 10-shaft, 11-heat-insulating cement sheath, 12-heat-conducting cement sheath, 13-shell, 14-spiral plate, 15-output pipe, 16-input pipe, 17-communicating pipe, 18-oil layer or gas layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
A geothermal and oil-gas co-production system in oil or natural gas exploitation comprises a shaft 10 which is formed to be led to the deep part of a stratum after drilling, a casing 1 which is arranged in the shaft, a gravity heat pipe heat exchanger condensation section which is butted with the top end of the casing 1, a conveying pipe 6 which penetrates through the casing 1 and the gravity heat pipe heat exchanger, and a packer 7, wherein a heat-conducting cement ring 12 and a heat-insulating cement ring 11 are respectively arranged on the outer wall of the casing 1 and the shaft 10 from bottom to top for well cementation; a packer 7 is arranged in the casing above the oil layer or the gas layer to separate oil and gas from the upper space, and perforations are arranged in the casing below the packer 7 towards the oil layer or the gas layer to serve as a production channel 2; the bottom end of the conveying pipe 6 extends into an oil layer or a gas layer 18, and the upper end of the conveying pipe 6 extends out of the condensing section of the gravity heat pipe heat exchanger; perforating a through hole 5 corresponding to the section of the heat insulation cement sheath 12 above the packer 7 from the casing 1 to the rock stratum, fracturing and injecting heat conduction filler from the through hole 5 to form a heat conduction band 3; a short pipe 4 is put into the through hole 5 and the through hole is sealed by expanding the pipe; the condensing section of the gravity heat pipe heat exchanger is arranged at the upper end of the sleeve, and the sleeve and the shell which is in butt joint with the sleeve are jointly used as the shell pass of the gravity heat pipe heat exchanger; the system can not only realize that a well is adopted more, can also prevent oil gas rising in-process wax deposition, scale deposit.
The device also comprises an adjusting pipe 8, the bottom end of the adjusting pipe penetrates through a packer 7 and extends into an oil layer, the upper end of the adjusting pipe penetrates out of a condensing section of the gravity heat pipe heat exchanger and is provided with a valve 9, the adjusting pipe 8 only needs to be arranged in the production of an oil well, natural gas is directly output from a conveying pipe in the production of the natural gas well without arranging the adjusting pipe 8 to adjust the pressure in the casing pipe 1, in the production of the oil well, the adjusting pipe 8 can adjust the pressure in the casing pipe 1 below the packer 7, because associated gas generated in the production of oil is gathered in the casing pipe below the packer 7, the pressure at the lower part of the packer 7 needs to be relieved through the valve 9 when reaching the pressure bearing capacity of the packer, the effect failure of the packer is avoided, and in addition, the associated gas discharged from the.
The section of the sleeve 1 corresponding to the heat-conducting cement ring 12 is an evaporation section of the gravity heat pipe exchanger, the section of the sleeve 1 corresponding to the heat-insulating cement ring 11 is a heat-insulating section of the gravity heat pipe exchanger, the condensation section of the gravity heat pipe exchanger comprises a shell 13 and a spiral plate 14, the spiral plate 14 is installed in the shell 13, the vertical spiral plate 14 is installed in the shell 13 of the condensation section and serves as a pipe pass of the gravity heat pipe exchanger, the sleeve 1 and the shell 13 connected with the sleeve are used as a shell pass of the gravity heat pipe exchanger, the spiral plate 14 is hollow, an output pipe 15 is arranged at the central position of the spiral plate 14 along the axial direction of the spiral plate, the upper end of the output pipe 15 penetrates through the top end of the shell 13 and extends outwards, the output pipe 15 is communicated with the central end of the spiral plate 14, a transverse input pipe 16 is arranged at the peripheral end of the spiral plate 14, one end of the input pipe 16 is communicated with the, the other end of the input pipe 16 penetrates through the side wall of the shell 13 and extends outwards; a communicating pipe 17 is further arranged on the side wall of the shell 13, and heat transfer working medium enters the spiral plate 14 from one end of the input pipe 16, absorbs heat and is heated up and then is output from the output pipe 15.
Thermal-insulated cement sheath pour into by thermal-insulated grout and form, thermal-insulated grout portland cement and water mixed configuration, heat conduction cement sheath pour into by heat conduction grout and form, heat conduction cement sheath is by portland cement, heat conduction filler and water mixed configuration, the weight ratio of portland cement and heat conduction filler is 100 (5-100) in the heat conduction cement sheath, wherein the fineness of heat conduction filler is 0.04mm-0.5 mm.
The heat-conducting filler comprises one or more components of graphene, high heat-conducting carbon powder, silver, copper, gold, aluminum, sodium, molybdenum, tungsten, zinc, nickel, iron, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide.
The working principle of the utility model is as follows:
Petroleum or natural gas of an oil layer or a gas layer 18 enters the casing 1 at the lower part of the packer 7 through the production channel 2 and is conveyed to the outside of the production well through the conveying pipe 6, the packer 7 separates the petroleum or the natural gas from the space at the upper part of the casing, the heat-conducting cement ring 12 and the heat-conducting belt 3 are arranged at the upper part of the packer 7 corresponding to the high-temperature section of the stratum, so that heat in the rock stratum far from the shaft can quickly and continuously enter the casing 1 for heat exchange, and the heat-insulating cement ring 11 is arranged at the upper part of the packer 7 corresponding to the low-temperature section of the stratum to avoid heat loss in the; and a vacuumizing device is connected outside the communicating pipe 17 to vacuumize the shell pass of the gravity heat pipe heat exchanger, liquid working medium is added into the shell pass of the gravity heat pipe heat exchanger through the communicating pipe 17 after vacuumizing, and then the communicating pipe is sealed. The liquid working medium absorbs heat from the geothermal layer at the evaporation section, then the liquid working medium is heated and vaporized, the liquid working medium rises along the annular space between the sleeve 1 and the conveying pipe 6, the vaporized working medium can exchange heat with the heat transfer working medium in the spiral plate 14 when rising to the condensation section of the gravity heat pipe heat exchanger above the ground, the vaporous working medium at the shell pass of the gravity heat pipe heat exchanger can be condensed into liquid after heat exchange, and flows back to the evaporation section to be heated and vaporized again under the action of gravity, and the working medium in the spiral plate 14 enters the heat absorption and heating pipe from the input pipe 16 and is output from the output pipe 15 in such a circulating way, so that the heat source is transferred to an object to be heated; adopt the system realize that oil and geothermol power adopt or natural gas and geothermol power adopt altogether, the annular space between make full use of sleeve pipe and the output tube to realize that a well adopts more.
The system of the utility model, because the heat-conducting cement ring 12 and the heat-conducting belt 3 are arranged at the high-temperature section of the stratum, the liquid state working medium on the upper part of the packer 7 between the inner wall of the sleeve 1 and the outer wall of the conveying pipe 6 can quickly absorb the heat of the high-temperature rock stratum in the stratum to be heated and evaporated, and the heat-insulating cement ring 11 arranged at the low-temperature section of the stratum can avoid the heat loss of the rising steam; in addition, the space at the upper part of the packer is vacuumized through the communicating pipe 17, the liquid working medium at the upper part of the packer 7 is heated to generate steam to ascend and transfer heat, the steam transfers heat quickly in the vacuum space, and the heat transfer efficiency can reach more than 95 percent, so that the heat is quickly transferred from a high-temperature section of a stratum to the gravity heat pipe heat exchanger, the space between the sleeve 1 at the upper part of the packer and the conveying pipe 6 is always kept in a high-temperature state, the temperature of the oil or natural gas at the upper part of the output pipe 6 is ensured not to be reduced, the phenomenon that the oil or natural gas in the output pipe is blocked due to wax precipitation and scale formation caused by temperature reduction in the ascending process is prevented, the yield of a production well and the production efficiency.
Except adopting newly-built oil well, natural gas well during the construction the utility model discloses the system the design, realize geothermol power and oil or natural gas and adopt altogether, can also reform transform built or discarded oil well, natural gas well, set up heat conduction band 3 in the stratum high temperature section of oil well, natural gas well built well promptly, go into packer 7 and nozzle stub 4 down, realize geothermol power and oil or natural gas and adopt altogether.
Claims (3)
1. The geothermal and oil gas co-production system in oil or natural gas exploitation is characterized by comprising a shaft (10) which is formed to be led to the deep part of a stratum after drilling, a casing (1) which is arranged in the shaft, a gravity heat pipe heat exchanger condensation section which is butted with the top end of the casing (1), a conveying pipe (6) which penetrates through the casing (1) and the gravity heat pipe heat exchanger, and a packer (7), wherein a heat-conducting cement ring (12) and a heat-insulating cement ring (11) are respectively arranged on the outer wall of the casing (1) and in the shaft (10) from bottom to top for well cementation; a packer (7) is arranged in the casing above the oil layer or the gas layer to separate oil and gas from the upper space, and perforations are formed in the casing below the packer (7) towards the oil layer or the gas layer to serve as a production channel (2); the bottom end of the conveying pipe (6) extends into an oil layer or a gas layer (18), and the upper end of the conveying pipe (6) extends out of the condensing section of the gravity heat pipe heat exchanger; perforating a through hole (5) from the casing (1) to a rock stratum corresponding to the section of the heat-insulating cement sheath (11) above the packer (7), and fracturing and injecting heat-conducting filler from the through hole (5) to form a heat-conducting strip (3); a short pipe (4) is put into the through hole (5) and the through hole is sealed by expanding the pipe; the condensing section of the gravity heat pipe heat exchanger is arranged at the upper end of the sleeve, and the sleeve and the shell which is in butt joint with the sleeve are jointly used as the shell pass of the gravity heat pipe heat exchanger.
2. The system for co-producing geothermal heat and oil and gas in oil or gas exploitation according to claim 1, further comprising a regulating pipe (8), wherein the bottom end of the regulating pipe passes through the packer (7) and extends into the oil layer, and the upper end of the regulating pipe passes through the condensing section of the gravity heat pipe heat exchanger and is provided with a valve (9).
3. The system for co-producing geothermal heat and oil and gas in oil or gas extraction according to any one of claims 1 or 2, wherein the section of the casing (1) corresponding to the heat-conducting cement sheath (12) is an evaporation section of a gravity heat pipe exchanger, the section of the casing (1) corresponding to the heat-insulating cement sheath (11) is an adiabatic section of the gravity heat pipe exchanger, the condensation section of the gravity heat pipe exchanger comprises a shell (13) and a spiral plate (14), the spiral plate (14) is installed in the shell (13), the vertical spiral plate (14) is installed in the shell (13) as a tube side of the gravity heat pipe exchanger, the casing (1) and the shell (13) connected with the casing are used as a shell side of the gravity heat pipe exchanger, the spiral plate (14) is hollow inside, an output pipe (15) is arranged at the center of the spiral plate (14) along the axial direction, the upper end of the output pipe (15) penetrates through the top end of the shell (13) and extends outwards, the output pipe (15) is communicated with the central end of the spiral plate (14), a transverse input pipe (16) is arranged at the peripheral end of the spiral plate (14), one end of the input pipe (16) is communicated with the peripheral end of the spiral plate, and the other end of the input pipe (16) penetrates through the side wall of the shell (13) and extends outwards; a communicating pipe (17) is also arranged on the side wall of the shell (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529079.5U CN209742861U (en) | 2019-04-18 | 2019-04-18 | Geothermal and oil gas co-production system in oil or natural gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920529079.5U CN209742861U (en) | 2019-04-18 | 2019-04-18 | Geothermal and oil gas co-production system in oil or natural gas exploitation |
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| Publication Number | Publication Date |
|---|---|
| CN209742861U true CN209742861U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920529079.5U Active CN209742861U (en) | 2019-04-18 | 2019-04-18 | Geothermal and oil gas co-production system in oil or natural gas exploitation |
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| CN (1) | CN209742861U (en) |
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- 2019-04-18 CN CN201920529079.5U patent/CN209742861U/en active Active
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