EP0819834B1 - Procédé pour creuser une cavité dans une mine de sel de faible épaisseur - Google Patents
Procédé pour creuser une cavité dans une mine de sel de faible épaisseur Download PDFInfo
- Publication number
- EP0819834B1 EP0819834B1 EP97401582A EP97401582A EP0819834B1 EP 0819834 B1 EP0819834 B1 EP 0819834B1 EP 97401582 A EP97401582 A EP 97401582A EP 97401582 A EP97401582 A EP 97401582A EP 0819834 B1 EP0819834 B1 EP 0819834B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tunnel
- injection
- void
- communication space
- blind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 57
- 238000002347 injection Methods 0.000 claims abstract description 55
- 239000007924 injection Substances 0.000 claims abstract description 55
- 238000000605 extraction Methods 0.000 claims abstract description 30
- 239000012267 brine Substances 0.000 claims abstract description 22
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 22
- 239000002904 solvent Substances 0.000 claims abstract description 18
- 238000004090 dissolution Methods 0.000 claims abstract description 17
- 230000004323 axial length Effects 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
Definitions
- the subject of the invention is a method for digging, by dissolution, a cavity in a ground containing mainly salt.
- the invention aims more particularly to obtain, after digging, a cavity allowing the storage of a fluid and in particular of natural gas in a salt mine comprising a thin layer of salt, the height is about a hundred meters.
- the communication space and the blind tunnel are dug in the continuation of one another sloping descending from the injection well so that the closed end of the injection well is lower than its open end.
- the blind tunnel is an optional well intended to recover the insoluble elements which come and drop off there.
- the invention proposes that we have the closed end of the blind tunnel at a higher or substantially higher height equal to that of the open end, so that we also dig the blind tunnel by circulation of the solvent in this tunnel, passing through its open end the solvent from the communication space in said tunnel and recover the brine thus formed to extract it.
- a blind tunnel is a separate tunnel communication space, which has a single end communicating with the communication space.
- the brine having a density greater than that of the solvent when the closed end of the blind tunnel is arranged at a height lower than the open end the brine tends to stagnate side of the closed end of the blind tunnel. So there is no more traffic solvent in the blind tunnel and digging by dissolving the tunnel one-eyed tends to disappear. This phenomenon is all the more marked since the the slope is steep and the blind tunnel is long.
- This solution notably has the advantage of allowing a wide variety of cavity shapes and mining in many directions.
- the term “draft” denotes the initial state a space or a tunnel (before the salt is dissolved by the solvent).
- the invention proposes that at the place of the connection between the blank of the space of communication and the draft of the blind tunnel (which place could be arranged a priori anywhere along the blank space communication between the two conduits), we can realize the end open from the blank blind tunnel overhanging the space of communication.
- the invention proposes have the injection and extraction conduits substantially coaxially so that one of these conduits is located in the center and is surrounded by the other, at the less over part of its axial length. There is then only one hole left. dig to make the two conduits.
- Figure 1 is illustrated a salt mine 1 appearing under stratified form between two mineral layers contained in the soil 10.
- An injection pipe 16 and an extraction pipe 18 have been arranged in two wells, after digging them, substantially vertically between ground level and a blank the cavity dug in salt mine 1.
- conduits include an end located at ground level 16a, 18b and one end 16b, 18a located in the cavity blank.
- the ends 16b, 18a located in the cavity blank 1a are connected by a draft 4 of communication space.
- draft 4 of the space of communication was drilled from conduit 18.
- Drilling axis 13 was shown in broken lines. The diameter of the blank is approximately 6 cm and preferably less than 10 cm.
- the draft 4 of the communication space includes a part elongated and substantially rectilinear and horizontal 4c comprised between a end part 4b in connection with the extraction duct 18, and another extreme part 4a surrounding the injection duct 16 over part of its length, near its end 16b forming an injection point in the cavity.
- a blank 2 of the blind tunnel was produced by extension of the elongated part 4c of the blank 4 of the communication space beyond of the injection duct 16.
- This blank 2 of the blind tunnel thus comprises a closed end 2b and an open end 2a communicating with the draft 4 of the communication space.
- the open end 2a overlooks the injection point 16a, so that the open end 2a is disposed at near the injection point 16b and that the lower part of the end open 2a is higher than the injection point 16b.
- the blank 4c of the elongated part of the space of communication and blank 2 of blind tunnel are substantially horizontal. We could also plan to make them slightly inclined.
- the open end of the blind holes should necessarily be lower than the closed end and likewise the part extended communication space should be lower on the side of the extraction duct only on the injection duct side.
- a solvent here water
- the water comes out of the conduit 16 through the injection point 16b where it is injected into the end 14a of the communication space as illustrated by the arrows 15a.
- This space of communication just like the whole cavity is entirely or least almost completely filled with water and brine. Water injected being less dense than the brine, it rises in the upper part of the cavity 11a. Water is injected at a pressure slightly higher than the pressure in the cavity.
- the injected water flows from the end 14a of the space of communication to the elongated part 14c of the communication space 14 and the blind tunnel 12. Water is not introduced due to the pressure injection into the blind tunnel, but under the action of a flow created by the salt dissolution.
- the water filling this cavity dig the salt mine by dissolving the salt, so that after digging, the blanks 4; 2 of the communication space and the blind tunnel form the communication space 14 and the blind tunnel 12 in width, in length and higher than their respective blanks.
- Salt-laden water forming brine then circulates in the lower part of the space of communication 14 and the blind tunnel 12 as illustrated by the arrows 15d, 15f.
- the brine passes from the blind tunnel 12 towards the elongated part and horizontal 14c of the communication space 14, so that the brine formed in the blind tunnel is recovered in the communication space to be extracted there.
- the blind tunnel 12 communicates with the communication space 14 only by the open end, which allows to drown the blind tunnel of water by introducing water into the tunnel and recovering the brine formed by dissolving the salt from the blind tunnel.
- FIG. 3 the elements corresponding to those of FIG. 2 have have been identified by a number increased by 10.
- This figure is different essentially of FIG. 2 in that the injection circuits 26 and extraction 28 are arranged coaxially.
- the injection circuit 26 descending lowest in the cavity 21a, it is located inside and the circuit extraction 28 outside.
- the extraction circuit 28 surrounds the circuit most of its length.
- the space of communication here no longer includes a horizontal elongated part and is produced entirely around the injection circuit 26, between the ends 26b, 28a injection and extraction conduits. Drilling the blank space communication can be obtained easily at the same time as that intended for the extraction duct. Axis 23 of the blind tunnel outline has been shown in broken lines.
- the circulation of water, and therefore of brine, is carried out using a compression pump 30 injecting pressurized water into the conduit injection 26 as indicated by arrow 27.
- FIG. 4 the elements corresponding to those of FIG. 3 have have been identified by a number increased by 10.
- This figure is different essentially from the previous one in that a second tunnel 43 draft blind was carried out.
- This figure illustrates the construction of multiple tunnels blind 32, 42 in fluid connection by their open end 32a, 42a with communication space 34.
- the water injected by the injection point 36b rises since it is less dense than the brine contained in the cavity and that the point injection is located under the open ends 32a, 42a of the blind holes.
- the water is then distributed between the different blind tunnels and digs them in loading with salt.
- the brine thus formed then tends to descend in the end 34a of the communication space, as illustrated by the arrows 35c.
- the flow 35a of injected water directs the brine to the end 38a of the extraction tube 38, as illustrated by the arrows 35b.
- the brine is then extracted by the extraction tube 38.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Steroid Compounds (AREA)
- Seasonings (AREA)
Description
- réaliser un conduit d'injection, un conduit d'extraction, une
ébauche d'espace de communication mettant en liaison les conduits
d'injection et d'extraction, et au moins une ébauche de tunnel borgne tel que :
- le tunnel borgne s'étende entre une extrémité ouverte et une extrémité close, et
- le tunnel borgne soit en liaison par son extrémité ouverte avec l'espace de communication,
- puis injecter, par le conduit d'injection, un solvant du sel dans l'espace de communication, afin de creuser la cavité par dissolution du sel au contact du solvant,
- extraire ensuite, par le conduit d'extraction, la saumure formée par la dissolution du sel.
- réaliser l'extrémité ouverte de l'ébauche du tunnel borgne à proximité du conduit d'injection,
- faire circuler le solvant dans le conduit d'injection et le faire ressortir de ce conduit par une extrémité formant point d'injection dans la cavité,
- réaliser l'ébauche du tunnel borgne avec la partie de son extrémité ouverte en surplomb du point d'injection.
- on réalise les conduits d'injection et d'extraction distants l'un de l'autre,
- on ménage une partie allongée dans l'ébauche de l'espace de communication,
- on réalise l'ébauche du tunnel borgne et la partie allongée de l'ébauche de l'espace de communication sensiblement dans le prolongement l'un de l'autre, et le conduit d'injection entre l'ébauche du tunnel borgne et la partie allongée de l'espace de communication.
- la figure 1 montre en coupe une première forme d'ébauche de cavité réalisée dans une mine de sel,
- la figure 2 montre en coupe une première forme de cavité obtenue à partir de l'ébauche de la figure 1 après creusement par dissolution d'une partie du sel contenu dans la mine,
- la figure 3 montre en coupe une deuxième forme de cavité obtenue après creusement par dissolution d'une partie du sel contenu dans la mine,
- la figure 4 montre en coupe une troisième forme de cavité obtenue après creusement par dissolution d'une partie du sel contenu dans la mine.
Claims (7)
- Procédé pour creuser, par dissolution, une cavité (la) dans un terrain (1) contenant en majorité du sel, ledit procédé comprenant les étapes suivantes :réaliser un conduit d'injection (16, 26, 36), un conduit d'extraction (18, 28, 38), une ébauche (4) d'espace de communication (14, 24, 34) mettant en liaison les conduits d'injection et d'extraction, et au moins une ébauche (2) de tunnel borgne (12, 22, 32, 42) tel que :le tunnel borgne s'étende entre une extrémité ouverte (2a) et une extrémité close (2b), etle tunnel borgne soit en liaison par son extrémité ouverte avec l'espace de communication,puis injecter, par le conduit d'injection, un solvant du sel dans l'espace de communication (4, 14, 24, 34), afin de creuser la cavité par dissolution du sel au contact du solvant,extraire ensuite, par le conduit d'extraction, la saumure formée par la dissolution du sel,
- Procédé selon la revendication 1, caractérisé en ce que l'on réalise l'extrémité ouverte (2a) de l'ébauche (2) du tunnel borgne (12, 22, 32, 42) en surplomb de l'ébauche (4) de l'espace de communication (14, 24, 34), à l'endroit de leur liaison.
- Procédé selon la revendication 1, caractérisé en ce que :on réalise l'extrémité ouverte (2a) de l'ébauche (2) du tunnel borgne (12, 22, 32, 42) à proximité du conduit d'injection (16, 26, 36), eton fait circuler le solvant dans le conduit d'injection et ressortir de ce conduit par une extrémité (16b, 26b, 36b) formant point d'injection dans la cavité,on réalise l'ébauche du tunnel borgne avec son extrémité ouverte en surplomb du point d'injection.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on dispose sensiblement coaxialement les conduits d'injection (16, 26, 36) et d'extraction (18, 28, 38) de sorte que l'un de ces conduits est situé au centre et est entouré par l'autre, au moins sur une partie de sa longueur axiale.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que :on réalise les conduits d'injection (16) et d'extraction (18) distants l'un de l'autre,on ménage une partie allongée (4c) dans l'ébauche de l'espace de communication,on réalise l'ébauche (2) du tunnel borgne et la partie allongée (4c) de l'ébauche (4) de l'espace de communication sensiblement dans le prolongement l'un de l'autre, et le conduit d'injection (16) entre l'ébauche (2) du tunnel borgne et la partie allongée (4c) de l'ébauche (4) de l'espace de communication.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on réalise plusieurs ébauches de tunnels borgnes (33, 43) en liaison avec l'espace de communication (34).
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on réalise l'ébauche (2) du tunnel borgne avec un diamètre inférieur à 10 cm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/895,983 US5957539A (en) | 1996-07-19 | 1997-07-17 | Process for excavating a cavity in a thin salt layer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9609104 | 1996-07-19 | ||
FR9609104A FR2751374B1 (fr) | 1996-07-19 | 1996-07-19 | Procede pour creuser une cavite dans une mine de sel de faible epaisseur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0819834A1 EP0819834A1 (fr) | 1998-01-21 |
EP0819834B1 true EP0819834B1 (fr) | 2003-06-11 |
Family
ID=9494256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97401582A Expired - Lifetime EP0819834B1 (fr) | 1996-07-19 | 1997-07-03 | Procédé pour creuser une cavité dans une mine de sel de faible épaisseur |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0819834B1 (fr) |
AT (1) | ATE242840T1 (fr) |
CA (1) | CA2210866A1 (fr) |
DE (1) | DE69722718T2 (fr) |
ES (1) | ES2201252T3 (fr) |
FR (1) | FR2751374B1 (fr) |
PT (1) | PT819834E (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6598686B1 (en) | 1998-11-20 | 2003-07-29 | Cdx Gas, Llc | Method and system for enhanced access to a subterranean zone |
US6662870B1 (en) | 2001-01-30 | 2003-12-16 | Cdx Gas, L.L.C. | Method and system for accessing subterranean deposits from a limited surface area |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6280000B1 (en) * | 1998-11-20 | 2001-08-28 | Joseph A. Zupanick | Method for production of gas from a coal seam using intersecting well bores |
US8297377B2 (en) | 1998-11-20 | 2012-10-30 | Vitruvian Exploration, Llc | Method and system for accessing subterranean deposits from the surface and tools therefor |
US6454000B1 (en) | 1999-11-19 | 2002-09-24 | Cdx Gas, Llc | Cavity well positioning system and method |
US7025154B2 (en) | 1998-11-20 | 2006-04-11 | Cdx Gas, Llc | Method and system for circulating fluid in a well system |
US6681855B2 (en) | 2001-10-19 | 2004-01-27 | Cdx Gas, L.L.C. | Method and system for management of by-products from subterranean zones |
US6425448B1 (en) | 2001-01-30 | 2002-07-30 | Cdx Gas, L.L.P. | Method and system for accessing subterranean zones from a limited surface area |
US7048049B2 (en) | 2001-10-30 | 2006-05-23 | Cdx Gas, Llc | Slant entry well system and method |
US6679322B1 (en) | 1998-11-20 | 2004-01-20 | Cdx Gas, Llc | Method and system for accessing subterranean deposits from the surface |
US8376052B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for surface production of gas from a subterranean zone |
US6412556B1 (en) | 2000-08-03 | 2002-07-02 | Cdx Gas, Inc. | Cavity positioning tool and method |
US8333245B2 (en) | 2002-09-17 | 2012-12-18 | Vitruvian Exploration, Llc | Accelerated production of gas from a subterranean zone |
CN102828777B (zh) * | 2012-09-19 | 2015-07-29 | 重庆大学 | 双竖井水平对接盐穴储库建造方法 |
EP3293314A1 (fr) * | 2016-09-12 | 2018-03-14 | MLW-intermed Handels- und Consultinggesellschaft für Erzeugnisse und Ausrüstungen des Gesundheits- und Bildungswesens mbH | Procédé de fabrication d'un reservoir d'eau |
CN107035343A (zh) * | 2017-03-17 | 2017-08-11 | 重庆大学 | 一种基于对井开采式老井的盐岩溶腔建造方法及其应用 |
CN111749733A (zh) * | 2019-03-28 | 2020-10-09 | 中国石油天然气集团有限公司 | 一种连通老腔改建储气库的方法 |
CA3083568C (fr) * | 2019-06-27 | 2021-07-06 | Eavor Technologies Inc. | Methode de guidage pour forage dirige multilateral |
CN110344810B (zh) * | 2019-07-18 | 2020-09-15 | 中国科学院武汉岩土力学研究所 | 一种盐岩层储气库水平腔的建立方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2822158A (en) * | 1949-03-05 | 1958-02-04 | Willard C Brinton | Method of fluid mining |
US3347595A (en) * | 1965-05-03 | 1967-10-17 | Pittsburgh Plate Glass Co | Establishing communication between bore holes in solution mining |
US3339978A (en) * | 1965-05-14 | 1967-09-05 | Pittsburgh Plate Glass Co | Prevention of floor erosion of a solution mining cavity |
US3510167A (en) * | 1968-08-19 | 1970-05-05 | Hardy Salt Co | Methods of solution mining |
US3873156A (en) * | 1973-01-15 | 1975-03-25 | Akzona Inc | Bedded underground salt deposit solution mining system |
US4411474A (en) * | 1981-05-20 | 1983-10-25 | Texasgulf Inc. | Solution mining of an inclined structure |
US5246273A (en) * | 1991-05-13 | 1993-09-21 | Rosar Edward C | Method and apparatus for solution mining |
US5431482A (en) * | 1993-10-13 | 1995-07-11 | Sandia Corporation | Horizontal natural gas storage caverns and methods for producing same |
-
1996
- 1996-07-19 FR FR9609104A patent/FR2751374B1/fr not_active Expired - Lifetime
-
1997
- 1997-07-03 AT AT97401582T patent/ATE242840T1/de active
- 1997-07-03 DE DE69722718T patent/DE69722718T2/de not_active Expired - Lifetime
- 1997-07-03 PT PT97401582T patent/PT819834E/pt unknown
- 1997-07-03 EP EP97401582A patent/EP0819834B1/fr not_active Expired - Lifetime
- 1997-07-03 ES ES97401582T patent/ES2201252T3/es not_active Expired - Lifetime
- 1997-07-18 CA CA002210866A patent/CA2210866A1/fr not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6598686B1 (en) | 1998-11-20 | 2003-07-29 | Cdx Gas, Llc | Method and system for enhanced access to a subterranean zone |
US6662870B1 (en) | 2001-01-30 | 2003-12-16 | Cdx Gas, L.L.C. | Method and system for accessing subterranean deposits from a limited surface area |
Also Published As
Publication number | Publication date |
---|---|
DE69722718T2 (de) | 2004-04-22 |
CA2210866A1 (fr) | 1998-01-19 |
ES2201252T3 (es) | 2004-03-16 |
FR2751374B1 (fr) | 1998-10-16 |
EP0819834A1 (fr) | 1998-01-21 |
FR2751374A1 (fr) | 1998-01-23 |
ATE242840T1 (de) | 2003-06-15 |
DE69722718D1 (de) | 2003-07-17 |
PT819834E (pt) | 2003-10-31 |
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