EP0833037A1 - Verfahren zum Aussolen einer Kaverne mit mehreren Unterkavernen in einer dünnen Salzschicht - Google Patents

Verfahren zum Aussolen einer Kaverne mit mehreren Unterkavernen in einer dünnen Salzschicht Download PDF

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Publication number
EP0833037A1
EP0833037A1 EP97402072A EP97402072A EP0833037A1 EP 0833037 A1 EP0833037 A1 EP 0833037A1 EP 97402072 A EP97402072 A EP 97402072A EP 97402072 A EP97402072 A EP 97402072A EP 0833037 A1 EP0833037 A1 EP 0833037A1
Authority
EP
European Patent Office
Prior art keywords
sub
salt
cavity
cavities
layer
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.)
Granted
Application number
EP97402072A
Other languages
English (en)
French (fr)
Other versions
EP0833037B1 (de
Inventor
Jean-Gérard Durup
Guy Boris
Yvon Charnavel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Engie SA
Original Assignee
Gaz de France SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gaz de France SA filed Critical Gaz de France SA
Publication of EP0833037A1 publication Critical patent/EP0833037A1/de
Application granted granted Critical
Publication of EP0833037B1 publication Critical patent/EP0833037B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
    • E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well

Definitions

  • the subject of the invention is a method for digging, by dissolution, a cavity in a ground comprising at least one layer containing in most salt to dissolve.
  • the invention aims more particularly to obtain, after digging, an underground cavity allowing the storage of a fluid and especially natural gas in a layer of stratified salt whose thickness is typically of the order of a few tens of meters, and more particularly between 30 meters and 100 meters.
  • Salt can in particular be constituted by sodium chloride (NaCl) or chloride potassium (KCl), without this being restrictive.
  • the object of the invention is in particular to propose a solution whose cost related to the volume of the cavity will be low.
  • the invention aims to improve the shape of the cavity obtained to adapt it to the shape of the salt layer and thus increase its volume.
  • the cavity to be submitted during its operation gas storage it is necessary to control the spread of dissolution in order to obtain a final cavity having a shape mechanically stable.
  • the cavity obtained must provide a satisfactory seal against the external environment.
  • Document US-A-3,510,167 discloses a process to improve the dissolution rate of a salt layer consisting of pass the solvent beforehand in another layer of salt in order to increase its density.
  • this method is far from the invention. Indeed, this process does not control the shape of the cavity obtained.
  • the present invention aims, for its part, at get a single cavity.
  • the final cavity will be produced from a succession of sub-cavities whose size, and in particular the height, can be controlled individually.
  • the shape of the cavity can thus be better adapted to the shape of the salt layer. Variations in the height of the cavity may especially be better controlled. This can be achieved without reaching the layer limits, mechanical stability and tightness of the cavity can be obtained by keeping a thickness of salt or brine all around.
  • the invention proposes that connect the last sub-cavity to the extraction duct, and inject the solvent successively in each of the sub-cavities.
  • This solution is simple and allows the salt to be dissolved substantially only in a sub-cavity at a time. Indeed, although the brine passes in all the sub-cavities separating the cavity into which the solvent is injected from the last sub-cavity, in practice due to its saturation in salt, the dissolution is not essentially produced only in the sub-cavity where the solvent is injected.
  • the invention also provides different solutions for making canals.
  • the isolated channels of the salt are produced by having casing sections in the borehole tight against the solvent and guiding the brine in these sections of casing.
  • This solution requires a longer implementation, but does not does not require a stable layer vis-à-vis the circulation of the brine (absence of dissolution, moderate erosion, ).
  • the seal between the cavity and the adjacent land can be obtained by retaining a thickness of brine between the cavity and the adjacent terrain.
  • these channels isolated from the layer containing the salt to be dissolved are made by drilling in an adjacent ground to said salt layer and containing little or no salt soluble by the solvent. This solution is quick to implement and requires few resources materials.
  • Figure 1 is illustrated a terrain comprising a layer 1 with a majority of salt. This layer is between two other 2, 4 mineral layers contained in the soil containing little or no salt.
  • a borehole 8 was made using drilling means (not represented) considered to be known.
  • This drill hole includes a substantially vertical section 8a extending from the ground level 6, up to the salt layer 1, an elongated substantially horizontal section 8b extending in the salt layer 1 to an end 8d and an angled section 8c connecting the vertical sections 8a and horizontal 8b.
  • an elongated casing 14 internally having a channel 24 is introduced into the borehole 8 and in particular in its horizontal section 8b.
  • a sealing material 16, comprising here cement is placed by injection between the casing 14 and the borehole 8. This material 16 seals between the casing 14 and the salt layer 1.
  • a cutting device 10 is then introduced into the casing 14.
  • a device is notably marketed under the reference MILL MASTER and the SERVCO brand (registered trademark).
  • the cutting device is connected to the surface 6 by a drill rod 12 allowing in particular the positioning of the device 10, its guidance along the casing and its energy and fluid supply.
  • the apparatus 10 is capable of eliminating from place to place, here by abrasion in specific areas 20b, 20c the casing 14 as well as the thickness of sealing material 16, up to come into contact with the salt layer 1.
  • This device travels along inside the casing from one specific area to another inside the casing 14 as indicated by arrow 18.
  • the sealing material could alternatively be abraded using a device sold under the SERVCO brand (registered trademark) and the Rock Type reference Undereamer.
  • the sub-cavities 20a, 20b, 20c, 20d, 20e, 20f are linked in pairs between a first sub-cavity 20a and a last sub-cavity 20f by channels 24a, 24b, 24c, 24d, 24e arranged inside casing sections 14a, 14b, 14c, 14d, 14e remaining after abrasion of the casing 14 in the different determined zones.
  • a 24f channel arranged at the interior of the casing 14 connects the cavity 20f to the surface of the ground 6.
  • a tube 22 is introduced concentrically into the channel 24 of the casing, advanced into the sub-cavity 20a by crossing each of the sub-cavities 20f, 20e, 20d, 20c, 20b and passing through each of the channels 24f, 24e, 24d, 24c, 24b, 24a.
  • This tube 22 has a notably outer diameter smaller than the inner diameter of the casing 14 in order to allow a fluid circulation between the tube 22 and the casing 14 in the channels 24a, 24b, 24c, 24d, 24e, 24f.
  • the tube 22 has an orifice 22a forming an injection point and intended to allow the injection of a solvent of the salt, here water, in the different sub-cavities 20a, 20b, 20c, 20d, 20e, 20f.
  • a solvent of the salt here water
  • an injection pump 28 operates pressure the water injected by the tube 22 forming an injection conduit.
  • the water injected by the injection point 22a into the last sub-cavity 20a digs the salt layer 1 by dissolving the salt in this sub-cavity 20a.
  • Brine formed by dissolving salt in water circulates in a space of communication formed by channels 24a, 24b, 24c, 24d, 24e and the sub-cavities 20b, 20c, 20d, 20th, 20f.
  • This pressurized brine is extracted from the sub-cavity 20f via channel 24f forming extraction channel.
  • the communication space constitutes an open circuit of circulation of water in the form of brine. Between two sub-cavities, the water is guided in a channel which isolates it from the salt layer 1, the casing and the sealing material being waterproof against water.
  • the dissolution takes place essentially in the sub-cavity 20a where the water is injected.
  • FIG. 7 several sub-cavities 20a, 20b, 20c have been dug by dissolution.
  • the dissolution of each of the sub-cavities is stopped before reach the mineral layer 2 located above the salt layer 1, so sealing.
  • the length of channels 24a, 24b, 24c, 24d, 24e and blanks of cavities 20a, 20b, 20c, 20d, 20e, 20f illustrated in Figure 4 has been chosen to allow communication between the different sub-cavities at the end of the dissolution.
  • variations in dimensions and particularly of height between the final cavity formed by the union of all the sub-cavities and the salt layer will be relatively weak.
  • the length of the channels is about 50 meters
  • the length of the blanks of cavities about 100 meters for a thick layer of salt approximately 100 meters.
  • the borehole 8 may have a diameter on the order of a few centimeters, and advantageously around 25 centimeters.
  • the blanks of sub-cavities 120a, 120b, 120c, 120d and channels 124a, 124b, 124c, 124d are made directly during the operation drilling.
  • the borehole 108 and more precisely the section generally horizontal 108b, includes a succession of sections made in the salt layer 101 (which form the blanks of sub-cavities 120a, 120b, 120c, 120d) and of sections made in the mineral layer 104 located under the salt layer 101 (which form connecting channels 124a, 124b, 124c, 124d waterproof against water, since the mineral layer 104 is assumed not or only slightly soluble in the solvent).
  • the digging of the various sub-cavities is carried out in a way comparable to the variant described with reference to FIGS. 1 to 7.
  • the tube 122 has been advanced into the first sub-cavity 120a.
  • the solvent is injected by the injection point 122a into the cavity 120a, dissolves the salt, then passes successively through channels 124a, 124b, 124c, 124d and the blanks of sub-cavities 120b, 120c, 120d, 120e.
  • the brine formed by dissolving the salt is extracted from the cavity 120e by the extraction channel 124f.
  • the last sub-cavity 120e is being digging.
  • the channels 124a, 124b, 124c, 124d play a role similar to that of channels 24a, 24b, 24c, 24d, 24e of Figures 4 to 7 by isolating the water from the salt layer.
  • the invention is in no way limited to the embodiments described above.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Treating Waste Gases (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP97402072A 1996-09-30 1997-09-05 Verfahren zum Aussolen einer Kaverne mit mehreren Unterkavernen in einer dünnen Salzschicht Expired - Lifetime EP0833037B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9611898A FR2754012B1 (fr) 1996-09-30 1996-09-30 Procede et installation pour creuser une cavite formee d'une pluralite de sous-cavites dans une couche de sel de faible epaisseur
FR9611898 1996-09-30

Publications (2)

Publication Number Publication Date
EP0833037A1 true EP0833037A1 (de) 1998-04-01
EP0833037B1 EP0833037B1 (de) 2002-12-11

Family

ID=9496200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402072A Expired - Lifetime EP0833037B1 (de) 1996-09-30 1997-09-05 Verfahren zum Aussolen einer Kaverne mit mehreren Unterkavernen in einer dünnen Salzschicht

Country Status (8)

Country Link
US (1) US5988760A (de)
EP (1) EP0833037B1 (de)
AT (1) ATE229611T1 (de)
CA (1) CA2216029A1 (de)
DE (1) DE69717752T2 (de)
ES (1) ES2188879T3 (de)
FR (1) FR2754012B1 (de)
PT (1) PT833037E (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1069732C (zh) * 1999-05-15 2001-08-15 洪泽县化工(集团)总公司 芒硝开采方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6708764B2 (en) * 2002-07-12 2004-03-23 Cdx Gas, L.L.C. Undulating well bore
US6826911B2 (en) * 2001-03-12 2004-12-07 Pomfret Storage Company, Llc Storage of energy producing fluids and process thereof
US6516616B2 (en) 2001-03-12 2003-02-11 Pomfret Storage Comapny, Llc Storage of energy producing fluids and process thereof
US20030029617A1 (en) * 2001-08-09 2003-02-13 Anadarko Petroleum Company Apparatus, method and system for single well solution-mining
WO2018114013A1 (de) * 2016-12-23 2018-06-28 Ewe Gasspeicher Gmbh Verfahren zum aussolen einer kaverne, damit hergestellte kaverne, verfahren zum herstellen einer energiespeichereinrichtung und damit hergestellte energiespeichereinrichtung
CN109505655A (zh) * 2019-01-16 2019-03-22 河南理工大学 一种盐穴储气库的建造方法
CN112709604B (zh) * 2019-10-24 2024-01-30 中国石油天然气股份有限公司 盐穴储气库内残渣及卤水排除装置及方法
CN111305808A (zh) * 2020-03-31 2020-06-19 南风集团淮安元明粉有限公司 筛管法采卤装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050122A (en) * 1960-04-04 1962-08-21 Gulf Research Development Co Formation notching apparatus
US3510167A (en) * 1968-08-19 1970-05-05 Hardy Salt Co Methods of solution mining
US4339008A (en) * 1980-06-09 1982-07-13 D. B. D. Drilling, Inc. Well notching tool
US4386665A (en) * 1980-01-14 1983-06-07 Mobil Oil Corporation Drilling technique for providing multiple-pass penetration of a mineral-bearing formation
US4418960A (en) * 1981-11-04 1983-12-06 Texasgulf Inc. Multiple-bed solution mining of an inclined structure
US4425003A (en) * 1981-11-04 1984-01-10 Texasgulf Inc. Single well-multiple cavity solution mining of an inclined structure
US4858689A (en) * 1988-04-11 1989-08-22 Resource Enterprises, Inc. Coal gasification well drilling process
US5246273A (en) * 1991-05-13 1993-09-21 Rosar Edward C Method and apparatus for solution mining
WO1995010689A1 (en) * 1993-10-13 1995-04-20 Sandia National Laboratories Horizontal natural gas storage caverns and methods for producing same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050122A (en) * 1960-04-04 1962-08-21 Gulf Research Development Co Formation notching apparatus
US3510167A (en) * 1968-08-19 1970-05-05 Hardy Salt Co Methods of solution mining
US4386665A (en) * 1980-01-14 1983-06-07 Mobil Oil Corporation Drilling technique for providing multiple-pass penetration of a mineral-bearing formation
US4339008A (en) * 1980-06-09 1982-07-13 D. B. D. Drilling, Inc. Well notching tool
US4418960A (en) * 1981-11-04 1983-12-06 Texasgulf Inc. Multiple-bed solution mining of an inclined structure
US4425003A (en) * 1981-11-04 1984-01-10 Texasgulf Inc. Single well-multiple cavity solution mining of an inclined structure
US4858689A (en) * 1988-04-11 1989-08-22 Resource Enterprises, Inc. Coal gasification well drilling process
US5246273A (en) * 1991-05-13 1993-09-21 Rosar Edward C Method and apparatus for solution mining
WO1995010689A1 (en) * 1993-10-13 1995-04-20 Sandia National Laboratories Horizontal natural gas storage caverns and methods for producing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1069732C (zh) * 1999-05-15 2001-08-15 洪泽县化工(集团)总公司 芒硝开采方法

Also Published As

Publication number Publication date
ES2188879T3 (es) 2003-07-01
CA2216029A1 (en) 1998-03-30
FR2754012B1 (fr) 1999-03-26
ATE229611T1 (de) 2002-12-15
FR2754012A1 (fr) 1998-04-03
DE69717752D1 (de) 2003-01-23
PT833037E (pt) 2003-04-30
DE69717752T2 (de) 2003-07-17
US5988760A (en) 1999-11-23
EP0833037B1 (de) 2002-12-11

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