CN114575924B - Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage - Google Patents
Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage Download PDFInfo
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- CN114575924B CN114575924B CN202210236237.4A CN202210236237A CN114575924B CN 114575924 B CN114575924 B CN 114575924B CN 202210236237 A CN202210236237 A CN 202210236237A CN 114575924 B CN114575924 B CN 114575924B
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- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a cavity building pipe column and a cavity building method for a horizontal cavity of an underground salt rock energy reservoir, wherein the cavity building pipe column for the horizontal cavity of the underground salt rock energy reservoir comprises a water injection pipe column and a brine outlet pipe column; the water injection pipe column and the brine outlet pipe column are drilled into a horizontal cavity of the underground salt rock energy storage in a single-well mode; the inner parts of the water injection pipe column and the brine outlet pipe column in the well comprise a vertical section and a horizontal section; the horizontal section of the brine outlet pipe column is arranged near the bottom of the horizontal cavity, and the surface of the horizontal section is provided with a plurality of brine outlet holes; the horizontal section of the water injection pipe column is arranged close to the top of the horizontal cavity, and the surface of the horizontal section is provided with a plurality of water injection holes; the outer side surfaces of the water injection hole and the brine outlet hole are provided with filter screens; the upper ends of the water injection pipe column and the brine outlet pipe column are fixed and exposed out of the ground surface, and are sequentially connected with a pressure gauge and a gate valve. The invention can improve the efficiency of water-soluble cavity construction, shorten the construction period of the salt rock reservoir, save the construction cost of the reservoir, and is beneficial to controlling the shape of the salt rock cavity and improving the stability of the salt rock reservoir.
Description
Technical Field
The invention relates to the technical field of construction of underground salt rock energy reservoirs, in particular to a cavity-forming pipe column and a cavity-forming method for a horizontal cavity of an underground salt rock energy reservoir.
Background
The salt rock has low permeability, high ductility, good creep property and damage self-healing property, and is widely used as an oil and gas storage. Compared with the foreign huge thick salt dunes, the salt rock ore beds in China have the characteristics of more ore layer layers and thin monolayer thickness, and are suitable for building horizontal salt rock oil and gas reservoirs.
Most of the salt rock reservoirs are distributed below 1000 meters underground, and the construction method of the horizontal type reservoir of the layered salt rock deposit adopts a double-well directional butt joint communication dissolution or single-well retreat type staged convection dissolution construction method.
Two wells need to be drilled, and water injection pipe columns and brine outlet pipe columns are respectively matched for water dissolution and cavity building, so that the construction cost of the oil-gas storage is high. The dissolution rate of the salt rock is influenced by the concentration, the brine concentration at the position close to the water injection pipe port is low, and the dissolution speed is high. In order to ensure the uniform development of the dissolving process, the shape of the cavity is regular, and the water injection pipe and the water outlet pipe need to be exchanged periodically. Even so, the shape of the dissolving cavity can still be developed into a dumbbell shape, the space of the layered salt rock cannot be effectively utilized, the shape of the cavity is irregular, the stability of the salt cavity is reduced, and the accident of roof collapse is easy to happen.
Single well retreating type branchThe stage convection dissolution cavity-building method (single well casing) needs one drilling well and adopts a concentric casing system (for engineering)
) And brine is injected and discharged, the central pipe is used for injecting water, and the annular space between the central pipe and the middle pipe is used for discharging brine. When the height of the dissolving cavity reaches the designed size, the water-soluble cavity of the stage is stopped, the tubular column system is retreated under the artificial control of the ground, and the water-soluble cavity of the next stage is formed after the pipe orifice reaches the designated position. The cavity building mode has the advantages of high requirement on control technology, low cavity building efficiency, long cavity building period, uneven concentration distribution in the cavity, low concentration of discharged brine and incapability of effectively utilizing injected fresh water.
In summary, the matched tubular column system in the existing cavity making mode has the following problems: the double-well and double-pipe column cavity building cost is high, the cavity shape is irregular, the single-well casing pipe column needs to retreat stage by stage, the requirement on the control technology is high, the cavity building efficiency is low, the concentration distribution in the cavity is uneven, and the brine outlet concentration is low.
Disclosure of Invention
The invention provides a cavity building pipe column and a cavity building method for a horizontal cavity of an underground salt rock energy reservoir, which are used for overcoming the defects of the existing double-well double-pipe and single-well sleeve type cavity building process pipe column, improving the efficiency of water-soluble cavity building of the horizontal salt rock oil and gas reservoir, shortening the construction period of the salt rock reservoir, saving the construction cost of the reservoir, being beneficial to controlling the shape of the salt rock cavity and improving the stability of the salt rock reservoir.
The purpose of the invention is realized by the following technical scheme:
a cavity-making pipe column for a horizontal cavity of an underground salt rock energy storage comprises a water injection pipe column and a brine outlet pipe column; the water injection pipe column and the brine discharge pipe column are drilled into the horizontal cavity of the underground salt rock energy storage in a single-well mode; the inner parts of the water injection pipe column and the brine outlet pipe column in the well comprise a vertical section and a horizontal section; the horizontal section of the brine outlet pipe column is arranged close to the bottom of the horizontal cavity, the front end of the pipe column is provided with a guide shoe, and the surface of the horizontal section is provided with a plurality of brine outlet holes at certain intervals; the horizontal section of the water injection pipe column is arranged close to the top of the horizontal cavity, a guide shoe is arranged at the front end of the pipe column, and a plurality of water injection holes are arranged on the surface of the horizontal section at certain intervals; the outer side surfaces of the water injection hole and the brine outlet hole are provided with filter screens; the upper ends of the water injection pipe column and the brine discharge pipe column are fixed and exposed out of the ground surface, and are sequentially connected with a pressure gauge and a gate valve; and a concentration monitoring control system is arranged at the outlet of the brine outlet pipe column.
Further, the shapes of the water injection hole and the brine outlet hole are circular, square or oval, and the maximum outer diameter D of the holes does not exceed 1/3 of the diameter D of the pipe column.
Furthermore, the water injection holes and the brine outlet holes are distributed in the upper, lower, front and rear directions in a staggered manner; at most, two holes are formed in the same cross section, so that the phenomenon that the rigidity of the pipe column is too low due to too many holes, and the pipe column is deformed greatly or even damaged is avoided.
Furthermore, the filter screens arranged on the outer side surfaces of the water injection hole and the brine outlet hole are used for preventing the cavity-creating pipe column from being blocked by insoluble substances; in the cavity forming process, the water injection pipe column and the brine discharge pipe column are exchanged at intervals to perform reverse filtration, so that the orifice is prevented from being blocked.
Further, manometer and gate valve are used for adjusting and controlling the pressure of water injection tubular column and the play steamed tubular column, and fresh water passes through the comparatively even injection of water injection hole, and bittern is through the comparatively even taking out of a steamed hole.
Furthermore, the horizontal sections of the water injection pipe column and the brine outlet pipe column are determined according to the horizontal dimension of the horizontal storage, and the process of inserting and pulling the pipe columns is omitted in the cavity forming process.
Furthermore, the vertical position of the brine outlet pipe column is basically kept unchanged, and the water injection pipe column is continuously lifted along with the water dissolving cavity building process and is always kept at a position close to the top of the dissolving cavity.
Furthermore, the concentration monitoring control system adopts a liquid electronic densimeter to measure the density of the discharged brine, then the brine concentration is obtained through conversion according to a brine density-concentration formula, and when the brine concentration is monitored to be close to the saturated concentration, the brine is discharged from the brine discharge pipe column through controlling the switch of the gate valve.
The invention also provides a method for constructing a cavity by using the cavity constructing tubular column for the horizontal cavity of the underground salt rock energy reservoir, which comprises the following steps:
step A, prefabricating a water injection pipe column and a brine outlet pipe column in a factory, and driving the water injection pipe column and the brine outlet pipe column into the specified positions of the underground salt deposit by adopting a single-well cavity building mode and utilizing a directional drilling technology;
step B, the water injection pipe column and the brine outlet pipe column are separately arranged, fresh water is injected into the salt rock ore bed through the water injection pipe column, and after the salt rock is dissolved for a period of time, water is pumped outwards through the brine outlet pipe column; the pressure and the flow of the injected water and the brine are controlled by a pressure gauge and a gate valve;
step C, gradually increasing the height of the horizontal section of the water injection pipe column along with the water-soluble cavity construction process, so that the horizontal section of the water injection pipe column is always kept at a position close to the top of the cavity; the horizontal section of the brine outlet pipe column is always kept at a position close to the bottom of the dissolving cavity; fresh water quickly reaches the top of the cavity to corrode the surface of the cavity, and high-concentration brine is discharged through the brine outlet pipe column;
d, exchanging the water injection pipe column and the brine outlet pipe column at intervals in a short time, and performing reverse filtration to prevent the orifice from being blocked;
and E, continuously injecting water, discharging brine and lifting pipes, and performing reverse filtration at intervals until the salt rock cavity meets the design requirements.
Furthermore, in the cavity making process, the water injection pipe column and the brine outlet pipe column are exchanged at an interval of 1-2 days, and reverse filtration is carried out for 10-30 minutes.
The invention has the beneficial effects that:
1. according to the underground salt rock energy reservoir horizontal cavity forming pipe column and the cavity forming method, only one drilling well is needed in the water-soluble cavity forming process, and compared with the existing double-well double-pipe cavity forming mode, the construction cost of a salt rock cavity is saved.
2. According to the underground rock salt energy storage horizontal cavity building tubular column and the cavity building method, the water injection holes and the brine discharge holes are formed in the water injection tubular column and the brine discharge tubular column, so that fresh water is uniformly injected into the dissolution cavity through the water injection holes, brine is uniformly discharged out of the dissolution cavity through the brine discharge holes, the concentration distribution of the dissolution surface is uniform, the rock salt dissolution cavity is prevented from being irregular, and the stability of the rock salt oil gas storage is improved. The water-soluble cavity-making process does not need to be carried out stage by stage, so that the process of inserting and pulling the tubular column is omitted, the efficiency of water-soluble cavity-making is improved, and the requirement on the control technology is reduced.
3. With the water injection tubular column separately with going out steamed tubular column, and the water injection tubular column is being close to the top of dissolving the chamber, and the fresh water density of injection is less than the salt solution, can directly carry out the upwards erosion at top, goes out steamed tubular column and is being close to the bottom of dissolving the chamber, and the concentration of brine is higher more, and its density is big more, and then the deposit is in dissolving the chamber bottom, and the brine concentration of going out steamed tubular column exhaust like this is higher, and the utilization ratio of fresh water promotes by a wide margin.
Drawings
FIG. 1 is a schematic diagram of a horizontal cavity construction pipe string and an initial cavity construction of an underground salt rock energy reservoir according to an exemplary embodiment of the invention;
FIG. 2 is a schematic diagram of a horizontal cavity-forming pipe string and a cavity-forming stage of a subterranean salt rock energy reservoir according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of a horizontal cavity construction string and a reverse filtration stage of an underground salt rock energy reservoir provided by an exemplary embodiment of the invention;
FIG. 4 is a detailed view of a horizontal section of a cavernous tubular column of a horizontal cavity of an underground salt rock energy reservoir according to an exemplary embodiment of the invention;
the reference numbers illustrate: 1 play steamed tubular column, 2 water injection tubular columns, 3 water injection holes, 4 play steamed holes, 5 filter screens, 6 guide shoes, 10 concentration monitoring control system, 20 row steamed gate valves, 30 row steamed mouthful manometer, 40 water injection mouth manometer, 50 water injection gate valves, 60 insoluble substance intermediate layer, 70 brine, 80 rock salt dissolves the chamber.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention provides a cavity building pipe column for a horizontal cavity of an underground salt rock energy reservoir, which is used for the water-soluble cavity building process of the underground salt rock energy reservoir, combines the characteristics of more salt rock ore layers, thin single-layer thickness and wide distribution of insoluble substance interlayers in China, and is particularly suitable for the cavity building process of the horizontal cavity of the salt rock reservoir in a salt rock ore bed containing an insoluble substance interlayer 60.
As shown in fig. 1-3, the horizontal cavity-creating pipe column of the underground salt rock energy reservoir provided by the embodiment of the invention comprises a water injection pipe column 2 and a brine outlet pipe column 1; the water injection pipe column 2 and the brine outlet pipe column 1 are drilled into the horizontal cavity of the underground salt rock energy storage in a single-well mode.
The inner parts of the water injection pipe column 2 and the brine outlet pipe column 1 in the well comprise a vertical section and a horizontal section; the horizontal section of the brine outlet pipe column 1 is arranged near the bottom of the horizontal cavity, the front end of the pipe column is provided with a guide shoe 6, as shown in figure 4, the surface of the horizontal section is provided with a plurality of brine outlet holes 4 at certain intervals l, and l is preferably 1-4 m; the horizontal section of the water injection pipe column 2 is arranged close to the top of the horizontal cavity, the front end of the pipe column is provided with a guide shoe 6, the surface of the horizontal section is provided with a plurality of water injection holes 3 at a certain interval l, and the l is preferably 1-4 m; the horizontal sections of the water injection pipe column 2 and the brine outlet pipe column 1 are determined according to the horizontal dimension of the horizontal storage, and the process of inserting and pulling the pipe columns is omitted in the cavity forming process; the vertical position of the brine outlet pipe column 1 is basically kept unchanged, and the water injection pipe column 2 is continuously lifted along with the water-soluble cavity building process and is always kept at a position close to the top of the salt rock dissolving cavity 80.
The outer side surfaces of the water injection hole 3 and the brine outlet hole 4 are respectively provided with a filter screen 5 for preventing the cavity-creating pipe column from being blocked by insoluble substances; in the cavity forming process, the water injection pipe column 2 and the brine outlet pipe column 1 are exchanged at intervals (preferably 1 to 2 days), and reverse filtration is carried out (the reverse filtration time is preferably 10 to 30 minutes), so that the orifice blockage is prevented.
The upper ends of the water injection pipe column 2 and the brine discharge pipe column 1 are fixed and exposed out of the ground surface, the upper end of the water injection pipe column 2 is sequentially connected with a water injection port pressure gauge 40 and a water injection gate valve 50, and the upper end of the brine discharge pipe column 1 is sequentially connected with a brine discharge port pressure gauge 30 and a brine discharge gate valve 20; the manometer and the gate valve are used for adjusting and controlling the pressure of water injection tubular column 2 and play steamed tubular column 1, and fresh water is more for even injection through water injection hole 3, and bittern 70 is more even taking out through going out steamed hole 4.
A concentration monitoring control system 10 is arranged at the outlet of the brine outlet pipe column 1; the concentration monitoring control system 10 adopts a liquid electronic densimeter to measure the density of the discharged brine, then converts the density to obtain the brine concentration according to a brine density-concentration formula, and when the brine concentration is monitored to be close to the saturated concentration, the brine is discharged from the brine discharge pipe column 1 by controlling the switch of the gate valve.
In one embodiment, the shape of the water injection hole 3 and the brine outlet hole 4 can be circular, square or elliptical, and as an example shown in fig. 4, the holes are circular, and the maximum outer diameter D of the holes does not exceed 1/3 of the diameter D of the pipe column.
The water injection holes 3 and the brine outlet holes 4 are distributed in the upper, lower, front and rear directions in a staggered manner; at the same section, two holes are formed at most, so that the phenomenon that the rigidity of the pipe column is too small due to too many holes, and the pipe column is deformed greatly or even damaged is avoided.
The embodiment of the invention also provides a method for cavity construction by using the cavity construction tubular column for the horizontal cavity of the underground salt rock energy reservoir, which comprises the following steps:
step A, determining the size and the position of a horizontal section of the cavity making pipe column according to the buried depth, the transverse dimension and the longitudinal dimension of the horizontal type salt rock oil and gas storage reservoir, designing and determining the distribution of water injection holes and brine outlet holes of the cavity making pipe column, and prefabricating a water injection pipe column and a brine outlet pipe column in a factory.
And step B, adopting a single well cavity building mode, utilizing a directional drilling technology, accurately acquiring the position of a drilling bit according to different measurement technologies such as sound wave guide, resistivity guide, electromagnetic distance measurement guide, seismic while drilling guide and the like, adjusting the drilling direction of the drilling bit through the formation characteristics and geological characteristics measured while drilling, penetrating through the insoluble substance interlayer 60, and driving the water injection pipe column and the brine discharge pipe column into the specified position of the underground rock salt deposit.
And step C, injecting fresh water into the salt rock ore bed through the water injection pipe column, and after the salt rock is dissolved for a period of time, pumping water outwards through the brine outlet pipe column. The pressure and the flow of the water injection brine discharge are controlled by the pressure gauge and the gate valve, the fresh water is injected through the water injection hole more uniformly, and the brine is pumped out through the brine discharge hole more uniformly.
And D, along with the water-soluble cavity construction process, the radial size of the cavity is continuously increased, and the height of the horizontal section of the water injection pipe column is gradually increased, so that the horizontal section of the water injection pipe column is always kept at a position close to the top of the cavity. The horizontal section of the brine outlet pipe column is always kept at a position close to the bottom of the dissolving cavity. Therefore, the injected fresh water can be ensured to rapidly reach the surface of the top corrosion cavity, and the brine with higher concentration is deposited at the bottom of the salt rock cavity and then discharged through the brine discharge pipe column.
And E, exchanging the water injection pipe column and the brine outlet pipe column at a certain interval in a short time, and performing reverse filtration to prevent the orifice from being blocked.
And F, continuously injecting water, discharging brine and lifting the pipe, and performing reverse filtration at intervals, namely repeating the steps C, D and E until the salt rock cavity meets the design requirement.
The invention has the following characteristics:
(1) A single well is adopted for building a cavity, a sleeve is not arranged, and a water injection pipe column and a brine outlet pipe column are separately arranged;
(2) The water injection pipe column is arranged near the top of the dissolving cavity, and the brine outlet pipe column is arranged near the bottom of the dissolving cavity. The injected fresh water quickly reaches the top surface of the salt cavity, and the concentration of the discharged brine is higher. The utilization rate of the fresh water can be improved.
(3) The surface in water injection hole and the play steamed hole is provided with the filter screen, makes the chamber in-process, and interval a period will water injection tubular column and play steamed tubular column exchange, and the anti-filtration prevents drill way jam. The water injection hole can be so that the concentration distribution in the dissolving cavity is comparatively even with going out steamed hole, avoids the salt rock dissolving cavity irregular shape to appear, strengthens the stability of salt rock oil gas storage storehouse.
(4) The application of the invention ensures that the water-soluble cavity construction process does not need to be carried out stage by stage, the process of inserting and pulling the tubular column is saved, the requirement on the control technology is reduced, and the efficiency of water-soluble cavity construction is improved.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the invention in any way, and it should be understood that the technical features of the present invention are not limited by the above description, and equivalent changes and modifications can be made by one skilled in the art without departing from the technical features of the present invention.
Claims (9)
1. A cavity-making pipe column for a horizontal cavity of an underground salt rock energy storage is characterized by comprising a water injection pipe column and a brine outlet pipe column; the water injection pipe column and the brine outlet pipe column are separately arranged, and are drilled into a target stratum in a single-well mode and used for building a horizontal cavity of an underground salt rock energy storage by a water dissolving method; the well parts of the water injection pipe column and the brine discharge pipe column comprise a vertical section and a horizontal section; the horizontal section of the brine outlet pipe column is arranged near the bottom of the horizontal cavity, the front end of the pipe column is provided with a guide shoe, and the surface of the horizontal section is provided with a plurality of brine outlet holes; the horizontal section of the water injection pipe column is arranged close to the top of the horizontal cavity, a guide shoe is arranged at the front end of the pipe column, and a plurality of water injection holes are formed in the surface of the horizontal section; the vertical position of the brine outlet pipe column is kept unchanged, and the water injection pipe column is continuously lifted along with the water dissolving cavity building process and is always kept at a position close to the top of the dissolving cavity; the outer side surfaces of the water injection hole and the brine outlet hole are provided with filter screens; the upper ends of the water injection pipe column and the brine outlet pipe column are fixed and exposed out of the ground surface, and are sequentially connected with a pressure gauge and a gate valve; and a concentration monitoring control system is arranged at the outlet of the brine outlet pipe column.
2. The horizontal cavity-making pipe string of the underground salt rock energy storage bank as claimed in claim 1, wherein the shapes of the water injection hole and the brine outlet hole are circular, square or oval, and the maximum outer diameter of the holes does not exceed 1/3 of the diameter of the pipe string.
3. The horizontal cavity-making pipe column of the underground salt rock energy storage bank according to claim 1, wherein the water injection holes and the brine outlet holes are distributed in four directions of up, down, front and back in a staggered manner; at most two holes are opened at the same section.
4. The horizontal cavity-creating pipe column of the underground salt rock energy storage bank as claimed in claim 1, wherein the filter screens are arranged on the outer side surfaces of the water injection hole and the brine outlet hole to prevent the cavity-creating pipe column from being blocked by insoluble substances; in the cavity making process, the water injection pipe column and the brine outlet pipe column are exchanged at intervals to perform reverse filtration, so that orifice blockage is prevented.
5. The underground salt rock energy storage horizontal cavity-making pipe column of claim 1, wherein the pressure gauge and the gate valve are used for adjusting and controlling the pressure of the water injection pipe column and the brine outlet pipe column, fresh water is uniformly injected through the water injection hole, and brine is uniformly extracted through the brine outlet hole.
6. The underground salt rock energy storage horizontal cavity building pipe column as claimed in claim 1, wherein the horizontal sections of the water injection pipe column and the brine outlet pipe column are determined according to the horizontal dimension of the horizontal storage, and the process of inserting and pulling out the pipe columns is omitted in the cavity building process.
7. The tubular column of claim 1, wherein the concentration monitoring and control system comprises a liquid electronic densimeter for measuring the density of the discharged brine, a brine density-concentration formula for converting the density to obtain the brine concentration, and a control gate valve for controlling the opening and closing of the gate valve to discharge the brine from the tubular column when the brine concentration is close to the saturation concentration.
8. A method for cavity construction by using the cavity construction tubular column of the horizontal cavity of the underground salt rock energy storage bank as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
step A, prefabricating a water injection pipe column and a brine outlet pipe column, and driving the water injection pipe column and the brine outlet pipe column into the specified positions of the underground salt deposit by adopting a single-well cavity building mode and utilizing a directional drilling technology;
step B, the water injection pipe column and the brine outlet pipe column are separately arranged, fresh water is injected into the salt rock deposit through the water injection pipe column, and after the salt rock is dissolved for a period of time, water is pumped outwards through the brine outlet pipe column; the pressure and the flow of the injected water and the brine are controlled by a pressure gauge and a gate valve;
step C, gradually increasing the height of the horizontal section of the water injection pipe column along with the water-soluble cavity construction process, so that the horizontal section of the water injection pipe column is always kept at a position close to the top of the cavity; the horizontal section of the brine outlet pipe column is always kept at a position close to the bottom of the dissolving cavity; fresh water quickly reaches the top of the cavity to corrode the surface of the cavity, and high-concentration brine is discharged through the brine outlet pipe column;
d, exchanging the water injection pipe column and the brine outlet pipe column at intervals in a short time, and performing reverse filtration to prevent the orifice from being blocked;
and E, continuously injecting water, discharging brine and lifting pipes, and performing reverse filtration at intervals until the salt rock cavity meets the design requirements.
9. The method as claimed in claim 8, wherein in the cavity making process, the water injection pipe column and the brine outlet pipe column are exchanged at an interval of 1-2 days for reverse filtration, and the reverse filtration time is 10-30 minutes.
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| CN202210236237.4A CN114575924B (en) | 2022-03-11 | 2022-03-11 | Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage |
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| CN202210236237.4A CN114575924B (en) | 2022-03-11 | 2022-03-11 | Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage |
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| US5065821A (en) * | 1990-01-11 | 1991-11-19 | Texaco Inc. | Gas flooding with horizontal and vertical wells |
| CA2593585C (en) * | 2006-07-24 | 2012-10-02 | Uti Limited Partnership | In situ heavy oil and bitumen recovery process |
| CN102536174B (en) * | 2012-03-01 | 2015-09-09 | 邱世军 | A kind of longitudinal mining geothermal energy method |
| CN204371132U (en) * | 2014-12-05 | 2015-06-03 | 中国石油天然气股份有限公司 | SAGD dual horizontal well cyclic preheat tubing string |
| RU2597040C1 (en) * | 2015-07-28 | 2016-09-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) федеральный университет" (ФГАОУВПО КФУ) | Method for development of hydrocarbon fluid deposits |
| CN105672967B (en) * | 2016-03-16 | 2018-09-04 | 中国石油天然气股份有限公司 | The tubing string and its oil production method of SAGD dual horizontal wells |
| CN105863599A (en) * | 2016-04-27 | 2016-08-17 | 重庆大学 | Old well utilization method adopting single-cavity old well as brine-extraction horizontally-butted well |
| CN108087024A (en) * | 2017-12-13 | 2018-05-29 | 中盐勘察设计院有限公司 | A kind of method of construction of tunnel type salt cave storage cavern |
| CN110593917B (en) * | 2018-06-12 | 2022-02-08 | 江苏省制盐工业研究所有限公司 | Method for quickly building horizontal type oversized salt cavern storage |
| CN111305808A (en) * | 2020-03-31 | 2020-06-19 | 南风集团淮安元明粉有限公司 | Bittern collecting device by sieve tube method |
| CN113090242A (en) * | 2021-05-07 | 2021-07-09 | 江苏省制盐工业研究所有限公司 | Method for constructing salt cavern storage by directional floating pipes |
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