WO2022177464A1 - Method of forming an underground reservoir in a stratum of rock salt - Google Patents
Method of forming an underground reservoir in a stratum of rock salt Download PDFInfo
- Publication number
- WO2022177464A1 WO2022177464A1 PCT/RU2022/000038 RU2022000038W WO2022177464A1 WO 2022177464 A1 WO2022177464 A1 WO 2022177464A1 RU 2022000038 W RU2022000038 W RU 2022000038W WO 2022177464 A1 WO2022177464 A1 WO 2022177464A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vertical
- well
- horizontal
- technological
- salt
- Prior art date
Links
- 235000002639 sodium chloride Nutrition 0.000 title claims abstract description 48
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 12
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 29
- 150000003839 salts Chemical class 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims description 21
- 239000012267 brine Substances 0.000 claims description 20
- 238000004090 dissolution Methods 0.000 claims description 17
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000566515 Nedra Species 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G5/00—Storing fluids in natural or artificial cavities or chambers in the earth
Definitions
- the proposed technical solution relates to the construction of underground reservoirs through wells in rock salt by dissolving it and can be used in the oil, gas and chemical industries to create underground storage facilities and to extract salt through wells.
- a known method of constructing an underground tunnel reservoir in a bed of rock salt of limited power involving the drilling of vertical and directional (vertical-horizontal) wells with the output of a directional (vertical-horizontal) well in a horizontal position near the bottom of the salt reservoir, installation of casing and technological pipe strings in the wells, shutdown of wells in a salt reservoir, injection of a non-solvent, dissolution of rocks by supplying water through the process pipe string of a directed well with brine extraction along the process pipe string of a vertical well (RU 2258652, publ. 20.08.2005).
- the disadvantage of this method is the uneven dissolution of salt along the length of the tunnel tank, since the most intensive dissolution occurs above the shoe of the technological pipe string of a directional (vertical-horizontal) well, and the least intensive - near the vertical well, which leads to incomplete use of the formation thickness.
- the disadvantage of this method is the download non-solvent into a directional well and creating a development near the casing shoe of the directional well.
- the method can be implemented only with a strictly horizontal roof of the salt reservoir, since a necessary condition for its implementation is to maintain the non-solvent-brine interface in a vertical well at or above the level of the non-solvent-brine interface in the development working or the horizontal part of the working working being constructed, moreover, the fixation of the moment of completion of construction is carried out by the flow of the non-solvent from the horizontal part of the mine to the vertical well.
- the disadvantage of this method is the uneven dissolution of salt along the length of the tunnel reservoir, since the salt is predominantly dissolved near the vertical well, where the dissolution process is longer, as a result of which the salt reservoir will be mined to its full height, exposing the casing shoe of the vertical well before sufficient salt dissolution occurs. along the length of the tank.
- the method involves moving the technological column of pipes of a vertical-horizontal well, which is technically difficult and can lead to a break in the string.
- the proposed solution has the following advantages: the ability to control the formation of an underground reservoir through the use of a non-solvent injected into a vertical well;
- the essence of the proposed method lies in the use of the method of constructing an underground tunnel reservoir in a rock salt formation of limited thickness, which involves drilling vertical and vertical-horizontal wells with the latter in a horizontal position near the bottom of the salt formation, installation of casing and technological pipe strings in the wells with the shoes of technological columns pipes at the bottom of the salt formation, shutting down wells, dissolving salt by supplying water through the technological string of pipes of a vertical-horizontal well and withdrawing brine through the technological string of pipes of a vertical well, changing the point of water supply to the mine under construction during the transition to the next stage of dissolution.
- a technological pipe string is installed on a vertical well, consisting of two coaxially located hanging strings, a non-solvent is pumped into the annular space of the casing and external hanging strings and a development working is created with dimensions that ensure the shutdown of vertical and vertical-horizontal wells.
- Two coaxially located suspended columns in a vertical well make it possible to create a development working.
- the injection of a non-solvent into a vertical well makes it possible to control the dissolution of salt in the top of the development working and near the well.
- a periodic change in the point of water supply to the development under construction is carried out by installing a packer in the technological column of a vertical-horizontal well and subsequent perforation of the column in front of the packer.
- the packer is installed to exclude the passage of water to the previous point of its supply and uncontrolled salt dissolution.
- the level of non-solvent in the vertical well is raised in such a way as to slow down the dissolution of salt in the ceiling of the development working and prevent the top of the salt formation from being exposed near the casing shoe of the vertical well until the construction of the underground reservoir is completed.
- the inner overhead string is removed from the vertical well, and the brine is taken along the outer overhead string.
- FIG. 1 shows a diagram of the method of construction after the creation of a preparatory development in a vertical well and well shutdown.
- FIG. 2 shows a diagram of the method of construction after the last stage of creating a working.
- the images in Fig. 1 and 2 include vertical 1 and vertical-horizontal 2 wells, rock salt formation of limited thickness 3.
- Vertical well 1 is equipped with a casing string 4 and a technological string consisting of external 5 and internal 6 hanging columns. In the space between the casing string 4 and the external hanging string 5 there is a non-solvent 7, which has an interface with the brine at level 8.
- a development working 9 is created in the lower part of the well 1.
- the vertical-horizontal well 2 is equipped with a casing string 10 and a technological string 11
- the shoe of the technological column of a vertical-horizontal well 2 corresponding to the water supply point before the first stage of creating a working, is set to position 12.
- the method is carried out as follows. First, a vertical well is drilled 1. Well 1 is equipped with a casing string 4 and two coaxially located outboard outer 5 and inner 6 columns. The outer hanging string 5 is installed at a depth above the bottom of the salt formation 3, and the inner hanging string 6 is near the bottom of the formation 3. A non-solvent 7 is pumped into the well 1, setting the non-solvent-brine interface 8 to the depth of the mark of the outer shoe. suspension column 5. Water is pumped through the external suspension column 5 and brine is taken along the internal suspension column 6, as a result of which a development working 9 is created. 11, the shoe of which is set at a certain distance from the vertical well to position 12.
- the level of non-solvent in well 1 is raised, water is pumped through the technological column 11 and brine is taken from the hanging columns 5 and 6 of well 1.
- the inner suspension string 6 is withdrawn from the vertical well 1, and the brine is taken along the external suspension string 5.
- a packer 13 is installed in the technological string 11 and the string 11 is perforated, creating perforations 16.
- the level of the non-solvent in the well 1 is raised, water is pumped through the technological string 11 and the brine is taken along the overhead string 5. After extracting a certain volume of salt and creating a working 20, the second stage ends.
- packer 14 is installed, perforations 17 are created, lifted level of non-solvent, water is pumped in and brine is taken, extracting a certain amount of salt, creating a development 21 at the third stage. Similarly, operations are carried out at the fourth stage, after which an underground reservoir 22 is created.
- an underground reservoir 22 with a volume of 350 thousand m3 is constructed in the depth interval of 1150-1200 m of the salt reservoir 3.
- a vertical well 1 is drilled 1 m deeper than the sole of the salt reservoir 3
- a casing string 4 is installed to a depth of 1150 m, then into the well hanging columns 5 and 6 are lowered to a depth of 1198 and 1199.5 m, respectively.
- Non-solvent 7 is pumped to the level of 8 - 1198 m. controlled by geophysical methods through a vertical well 1 using downhole tools on a cable.
- Cylindrical developmental working 9 is eroded with a height of 2 m and a radius of 2 m.
- the level of non-solvent in the development working 9 is set 10 m above the mark at which the wells 1 and 2 failed.
- Water is supplied to the technological column 11 at a flow rate 250 m 3 / hour, and the resulting brine is taken along the technological column of the vertical well along the suspended columns 5 and 6.
- a working is formed 19.
- a packer 13 is installed in the technological column 11 at a distance of 150 m from the vertical well. Then the column 11 is perforated in front of the packer 13 in such a way that the total area of the perforations was twice the flow section of the column 11.
- a new water supply point 16 is created.
- the level of non-solvent in the development working 9 is raised by 10 m. hour, and the resulting brine is taken along the technological column of the vertical well 1 along the hanging columns 5 and 6.
- a working 20 is formed.
- a packer 14 is installed in the technological column 11 at a distance of 240 m from the vertical well. column 11 before the packer as well as after the first stage.
- a new water supply point 17 is created.
- the level of non-solvent in the development working 9 is raised by 10 m.
- the proposed technical solution was implemented when creating an underground tunnel reservoir in a rock salt seam of limited capacity at one of the underground gas storage facilities in the Russian Federation.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280028876.XA CN117178106A (en) | 2021-02-17 | 2022-02-14 | Method for forming underground reservoirs in rock salt formations |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2021103987 | 2021-02-17 | ||
RU2021103987A RU2754232C1 (en) | 2021-02-17 | 2021-02-17 | Method for constructing an underground tunnel reservoir in a rock salt reservoir of limited capacity |
Publications (1)
Publication Number | Publication Date |
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WO2022177464A1 true WO2022177464A1 (en) | 2022-08-25 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2022/000038 WO2022177464A1 (en) | 2021-02-17 | 2022-02-14 | Method of forming an underground reservoir in a stratum of rock salt |
Country Status (3)
Country | Link |
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CN (1) | CN117178106A (en) |
RU (1) | RU2754232C1 (en) |
WO (1) | WO2022177464A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN116163701A (en) * | 2021-11-24 | 2023-05-26 | 中国石油天然气股份有限公司 | Completion method for reconstructing brine-discharging well of gas storage in old salt mine cavity |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2861428A (en) * | 1953-12-28 | 1958-11-25 | Phillips Petroleum Co | Underground storage cavern having laterally spaced well and method therefor |
SU140369A1 (en) * | 1961-03-21 | 1961-11-30 | М.Г. Головкин | Method of constructing underground tanks for petroleum, petroleum products and liquefied gases in rock salt formations |
SU1820597A1 (en) * | 1990-11-29 | 1996-10-20 | Украинский научно-исследовательский институт природных газов | Method of building underground gas storages in low amplitude water bearing structures or water encroached gas bearing beds |
RU2236579C1 (en) * | 2003-07-02 | 2004-09-20 | Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (Технический университет) | Method for creating underground reservoirs in rock-salt formations |
RU2246437C1 (en) * | 2003-12-04 | 2005-02-20 | Государственное образовательное учреждение высшего профессионального образования Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет) | Method of building underground storage for gases in soluble deposits |
RU2258652C1 (en) * | 2004-02-17 | 2005-08-20 | Общество с ограниченной ответственностью (ООО) "Подземгазпром" | Method for underground tunnel reservoir building in rock salt bed having limited thickness |
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2021
- 2021-02-17 RU RU2021103987A patent/RU2754232C1/en active
-
2022
- 2022-02-14 WO PCT/RU2022/000038 patent/WO2022177464A1/en active Application Filing
- 2022-02-14 CN CN202280028876.XA patent/CN117178106A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2861428A (en) * | 1953-12-28 | 1958-11-25 | Phillips Petroleum Co | Underground storage cavern having laterally spaced well and method therefor |
SU140369A1 (en) * | 1961-03-21 | 1961-11-30 | М.Г. Головкин | Method of constructing underground tanks for petroleum, petroleum products and liquefied gases in rock salt formations |
SU1820597A1 (en) * | 1990-11-29 | 1996-10-20 | Украинский научно-исследовательский институт природных газов | Method of building underground gas storages in low amplitude water bearing structures or water encroached gas bearing beds |
RU2236579C1 (en) * | 2003-07-02 | 2004-09-20 | Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (Технический университет) | Method for creating underground reservoirs in rock-salt formations |
RU2246437C1 (en) * | 2003-12-04 | 2005-02-20 | Государственное образовательное учреждение высшего профессионального образования Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет) | Method of building underground storage for gases in soluble deposits |
RU2258652C1 (en) * | 2004-02-17 | 2005-08-20 | Общество с ограниченной ответственностью (ООО) "Подземгазпром" | Method for underground tunnel reservoir building in rock salt bed having limited thickness |
Also Published As
Publication number | Publication date |
---|---|
RU2754232C1 (en) | 2021-08-30 |
CN117178106A (en) | 2023-12-05 |
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