EP0974731A2 - Procédé et dispositif pour l'exploitation par dissolution d'un reservoir incliné - Google Patents

Procédé et dispositif pour l'exploitation par dissolution d'un reservoir incliné Download PDF

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Publication number
EP0974731A2
EP0974731A2 EP99111295A EP99111295A EP0974731A2 EP 0974731 A2 EP0974731 A2 EP 0974731A2 EP 99111295 A EP99111295 A EP 99111295A EP 99111295 A EP99111295 A EP 99111295A EP 0974731 A2 EP0974731 A2 EP 0974731A2
Authority
EP
European Patent Office
Prior art keywords
bore
brine
deposit
cavity
blanket
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
EP99111295A
Other languages
German (de)
English (en)
Other versions
EP0974731A3 (fr
EP0974731B1 (fr
Inventor
Norbert Dipl.-Ing. Grüschow
Frank Dipl.-Chem. Walkhoff
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.)
KAVERNEN BAU- und BETRIEBS-GESELLSCHAFT MBH
Original Assignee
KBB KAVERNEN BAU- UND BETRIEBS- GmbH
deusa Projektmanagement GmbH
KBB KAVERNEN BAU und BETRIEBS
KBB Kavernen Bau- und Betriebs- GmbH
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 KBB KAVERNEN BAU- UND BETRIEBS- GmbH, deusa Projektmanagement GmbH, KBB KAVERNEN BAU und BETRIEBS, KBB Kavernen Bau- und Betriebs- GmbH filed Critical KBB KAVERNEN BAU- UND BETRIEBS- GmbH
Publication of EP0974731A2 publication Critical patent/EP0974731A2/fr
Publication of EP0974731A3 publication Critical patent/EP0974731A3/fr
Application granted granted Critical
Publication of EP0974731B1 publication Critical patent/EP0974731B1/fr
Anticipated expiration legal-status Critical
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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
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/16—Methods of underground mining; Layouts therefor

Definitions

  • the invention relates to a method and a device for controlled Isolation of inclined deposits, preferably from small-scale underground potash deposits.
  • the object of the invention is to control highly rich zones of the deposit to solve or to sol, in order to bring the desired raw material maximize minimization of waste or residues at the same time.
  • the method according to the invention for the isolation of deposits, in particular inclined deposits provides that a cavity by means of one completed hole (1) and at least one more Well (2), which at least partially follows the collapse of the deposit, is sunk and completed, whereby between the above the bore (1) created cavity and at least one further bore (2) Connection is created and that to cover the in this Cavity (9) located brine a separated from the brine blanket medium (7) is introduced into the cavity, this blanket medium (7) through the holes (1) and (2), which are by means of a blanket pipeline (22) are connected in a pneumatic-hydraulic network being, the level of the brine level in the brine cavity is measured and that after reaching a defined amount of degradation of the The completion or part of the completion of the other Hole (2) withdrawn by a defined amount and the brine process is started again, the brine over the pipe tour of the bore (1) dissipated and the upper level of this further mining cavity in essentially due to the position of the blanket medium (7) above the Brine level is determined.
  • the last one in particular is cemented as a completion Pipe tour in a hole and the pipe tours necessary for the solution, that must be installed in the hole, understood.
  • the continuous measurement of the brine level has the advantage that in each Controlled the stage of the dissolving process and, if necessary, the Solution process can be corrected.
  • Separate management of the brine (16) and the blanket medium (7) advantageously serves the better Control and measurement of the brine level in the bore (1).
  • Another advantageous embodiment of the invention provides that in the Bore (1) in a further tube tour (5) a medium for dilution and / or heating the brine is carried out to crystallization on the pipe walls by z. B. to avoid supersaturated solutions otherwise can lead to disruptions to the extraction operations.
  • this is to be resolved Deposit area in the bore (2) by means of an injection pipe tour (11) the solvent (12) is fed separately from the blanket medium (7).
  • This has the advantage that the injection tube tour is independent of Diameter of the bore can be designed and changed the injection pipe tour of the Solution process can be better controlled without doing this to change the blanket.
  • the degradation can be advantageous through the Volume flow of the solvent (12) in the injection tube tour (11) to be controlled.
  • the procedure can be under optimal Conditions taking into account the z. B. for the expansion or Withdrawing the completions or part thereof, in particular the injection tube tour (11), necessary above ground Facilities are carried out.
  • the execution of one or more of the bores is particularly advantageous (2) as a deflected borehole, since the drilling starting point is more variable can be designed.
  • a deflected hole allows the Tracking of the deposit or the deposit body also at Changes in the collapse of the deposit or the offset of the Deposit, for example due to disturbances.
  • a gaseous medium is advantageously used as the blanket medium.
  • compressed air can be used as particularly suitable, which is a very inexpensive and ecological medium which is available everywhere.
  • the measurement of the level of the brine level underground becomes special advantageously by means of a physical measuring device in the bore carried out, since these measurement methods are trouble-free and easy to use and allow continuous measurements and also in a hole can remain permanently installed while the solution is running and thus a continuous control of the brine level or the one to be soled Allow deposit area.
  • the solvent (12) can also be at a temperature between 10 and 90 ° C, preferably a temperature between 40 and 60 ° C, in the Deposit. With such a heated solvent the brine process can be controlled or for a selective solution certain, for example potash-rich parts of the deposit are set and thus the degradation, especially the selective degradation, can be optimized.
  • the Solvent (12) during brine in the area of the upper part of the Concentrated cavity has the advantage that the below the Areas located in the brine level are mostly only selectively resolved so that the yield of the desired raw material is maximized, a blanket being dispensed with in these areas of the deposit can. This advantage also occurs when saturated or from the outset almost saturated NaCl solutions are used.
  • solid Constituents preferably processing residues, secondary crystals, Overburden and drill cuts or mixtures thereof, into the cavity be introduced, which has the advantage that above-ground landfills with these substances are avoided and the cavity is one Secondary use can be supplied, which at the same time has the advantage that To reduce or prevent the risk of possible damage to the mountain.
  • the combination according to the invention in the area of the deposit means a completed hole in a isolated cavity and one or more Wells that partially follow the collapse of the deposit and through the defined withdrawal of the brine / blanket level controlled degradation of the The deposit enables the controlled isolation of insignificant incident deposits.
  • the device used to carry out the method of isolation inclined deposits consists of a Injection tube tour (11) in a bore (2) for the supply of solvents (12), a tube tour (3) which is arranged in a bore (1) and for Promotion of the raw materials dissolved in the deposit serves, as well as a System for guiding the blanket medium (7), the guiding of the Blanket medium (7) in the hole (1) with the guide of the blanket medium (7) in the bore (2) is connected by a pipe (22).
  • the management of the blanket medium (7) in the bore (2) is designed such that the Annulus of the cemented pipe tour (10) and the injection pipe tour (11) is exploited.
  • This device enables the deposit to be mined with relatively simple and trouble-free means, so that the degradation can be carried out trouble-free and optimally and inexpensively.
  • a further tube tour are arranged in which a dilution and / or heating medium (13) Brine is fed. This prevents the high Saturation of the delivery pipe (4) closes the brine, which inevitably increases Disruption to brine production would result.
  • a conductive or capacitive measuring device (14) to measure the brine level in the underground cavity has the Advantage that such measuring devices are trouble-free and reliable work. They can also be in the well during production remain and measure the brine level continuously. The measurement signals are converted to an evaluation or Control device directed.
  • the method according to the invention as well as the device according to the invention can be used not only for the extraction of potash salts, but basically for the extraction of mineral salts, in particular also rock salt and magnesium salts for the production of marketable products such as NaCl and MgCl 2 , and for the extraction of sulfates , Carbonates and / or magnesium salts.
  • salable by-products such. B. bromine.
  • the extraction of these mineral salts leads to marketable products such as B. KCl, NaCl, MgCl 2 , K 2 SO 4 , Na 2 SO 4 , MgSO 4 , Mg (OH), MgO, Na 2 CO 3 and NaHCO 3 .
  • Figure 1 shows the deposit situation in the preparation phase graphically again
  • Figure 2 shows the production phase.
  • the potash layer consists of high-percentage Sylvinit 21 with 35 to 40% KCl content and 4 to 5 m thickness and KCl poorer Sylvinit 20 with 5 to 15% KCl content and 6 to 8 m thickness in the lying and hanging area.
  • the accompanying minerals of the KCl are mainly NaCl and to a small extent anhydrite. Except for traces, MgCl 2 is completely washed out.
  • a double probe is used for the mining of sylvinite according to Figure 1 consisting of a vertical hole 1 and a deflected inclined hole 2 created.
  • the distance between the The drilling starting points of the two holes are according to the geological However, the circumstances should and should be at least 100 m in the maximum extent of that technically and economically reasonable effort limited. A distance of 500 m - 2000 m is optimal.
  • the extraction of the deposit in terms of sol technology comprises one Preparation phase and a production phase.
  • the vertical bore 1 is according to the prior art for the isolation from individual caverns with a cemented pipe tour 3 to the top edge of the potash warehouse and with the concentric installation of two Production tube tours, the outer tube tour 4 and the inner tube tour 5 equipped.
  • the annular space 6 between the last cemented route and the outer conveyor tube tour is used to add blanket 7.
  • the isolation with Water as a solvent in this hole begins in the horizontal area of the Sylvinite layer 21 with the creation of a cavern sump 8 in direct Driving style and the creation of a cavity 9 by radial Enlargement of the borehole to at least 60 m at a height of 4 - 8 m in indirect driving style.
  • the blanket By using the blanket, a Isolation upwards prevented.
  • This sol technical undercut of Sylvinite deposit (also called under cut or broad solution) is generally for Creation of a sufficiently large release area necessary and guaranteed with a minimum extension of 60 m, the fluctuations in the Thickness and in the collapse of the high-proof potash layer 21 in the Isolation described below during the production phase in the deflected hole 2 can also be detected.
  • the deflected, inclined hole 2 is cut using the latest LWD (logging while drilling) drilling technology within the high-percentage sylvinite layer 21 drilled.
  • the good detectability of the K40 isotope can be sufficient precisely follow the collapse of the sylvinite deposit.
  • the deflected bore 2 with a cemented pipe tour 10 in the vertical and deflected area completed.
  • an injection tube tour 11 to in is in the bore 2 the wide solca 9 of the vertical bore 1 installed.
  • Figure 1 gives the Borehole construction and completion of the borehole at the end of the Preparatory phase again.
  • the outer annulus 15 of the inclined Bore 2 is with the outer annulus of the vertical bore 1 via a Surface blanket pipeline 22 connected and thus the hydraulic Linking the underground drilling into a system that converts behaves physically like communicating tubes.
  • the deflection is carried out Boring the developed area of the sylvinite deposit by circulating of slightly mineralized salt water with approx. 45 g NaCl / l as solvent 12 into the injection tube tour 11. Due to the lower density Compared to the brine in the cavity, the solvent 12 rises to the ridge of the broad sol cavity.
  • Withdrawal of blanket 7 became blanket level 14 in both Drilling changed by approx. 3 m upwards compared to the broad sol phase and thus a 3 m thick excavation disc in the inclined hole 2 Isolation released.
  • the saturation of the solvent with KCl and NaCl and thus the production of brine 16 takes place on the released Release surfaces.
  • the mixing of the solvent 12 at the injection point should be kept low in order to achieve a non-selective dissolution of the deposit in this cavern area. This is achieved by the choice of the diameter of the injection tube tour 11 in relation to the volume flow. It is advantageous to install a 4 1/2 "injection pipe tour 11, as this allows enough variation options for the selection of the volume flow.
  • the volume flow is optimized depending on the existing dissolving area in the cavern and should be 10 m 3 / h at the beginning and then gradually can be increased to 50 m 3 / h.
  • the brine 16 becomes lowest point of the hydraulic system in the wide sol space 9 of the Flow vertical hole 1.
  • a predominantly selective dissolution of the Sylvinites since the brine 16 is already has largely saturated with NaCl in the upper cavern area, but due to the NaCl / KCl ratio in the pending salt rock is still receptive to KCl.
  • brine turns 16 by means of the outer tube tour 4 through the built-up cavern pressure conveyed to the surface and further processed.
  • the injection pipe tour 11 in the inclined bore 2 withdrawn by a defined length, by the shortest route lead fresh solvent to the top of the cavern. Due to the Incline of the deposit of 10 to 15% means a reduction in the Injection tube tour 11 after every dismantling disc of at least 20 m. For Reduction in the cost of this pipe drawing work should always be possible Complete pipe lengths of the screwed injection pipe tour 11 get extended. In this sense there is also an increase in Dismantling disc up to 4 - 6 m and the extension of approx. 40 m Injection tube tour 11 with no significant negative impact on the full utilization of the deposit possible.
  • the pulling force required for the expansion of the injection pipe tour 11 depends next to the length of the inclined borehole from the spill of the injection pipe tour 11 due to residue and secondary crystals in the cavern area from. Since it is ensured that the annular space 15 of the inclined bore 2nd is always filled with blanket 7, only the lower part of the injection tube tour protrudes 11 in the cavern. The spillage of the injection tube tour 11 through residue and the length of the secondary crystals is therefore limited to approx. 3 m. To a very decisive extent, this allows the distances mentioned at the beginning 500 - 2000 m between the two holes 1 and 2.
  • FIGS. 3 to 5 show variants of the cavern dimensioning in the top view.
  • FIG. 3 shows two cavities that are located parallel in the deposit, that of individual mining disks or broad isolation rooms 23, which are offset overlap, exist.
  • the inclined or deflected hole 2 is in this example sunk from the drilling point 24 and with the Hole 1 connected.
  • the chronological sequence of drilling well 1 and 2 can be varied. After making the connection between the Both holes are followed by gradual removal of individual excavation disks, the selective brining of individual deposits in the marginal areas older disks can still be used.
  • the breakdown is controllable by the position of the injection tube tour 11 in the most recent removal disk, the volume flow of the solvent 12, the concentration and Composition of the solvent and the height of the disks.
  • Figure 4 shows the combination of two deflected bores 2 of two Drill approach points 24 to create a larger, contiguous cavity to brine in the deposit.
  • FIG. 5 shows the total mining of the deposit aimed for by First of all, two caverns, consisting of a number of wide-spread rooms (undercuts) 23, be brought, with one or more pillars 25 remain. Then by connecting the both caverns through a deflected bore also the one between the Caverns located pillars 25 dismantled.

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  • 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)
  • Remote Sensing (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Extraction Or Liquid Replacement (AREA)
EP99111295A 1998-07-11 1999-06-10 Procédé et dispositif pour l'exploitation par dissolution d'un reservoir incliné Expired - Lifetime EP0974731B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19831234A DE19831234C2 (de) 1998-07-11 1998-07-11 Verfahren und Vorrichtung zur Aussolung geneigter Lagerstätten
DE19831234 1998-07-11

Publications (3)

Publication Number Publication Date
EP0974731A2 true EP0974731A2 (fr) 2000-01-26
EP0974731A3 EP0974731A3 (fr) 2001-06-13
EP0974731B1 EP0974731B1 (fr) 2003-12-17

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EP99111295A Expired - Lifetime EP0974731B1 (fr) 1998-07-11 1999-06-10 Procédé et dispositif pour l'exploitation par dissolution d'un reservoir incliné

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EP (1) EP0974731B1 (fr)
DE (2) DE19831234C2 (fr)
ES (1) ES2213314T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110175428A1 (en) * 2010-01-20 2011-07-21 Harvey Haugen Solution Mining and a Crystallizer for Use Therein
CN104847358A (zh) * 2015-06-08 2015-08-19 中国科学院青海盐湖研究所 杂卤石开采方法
CN107701189A (zh) * 2017-10-31 2018-02-16 中国科学院武汉岩土力学研究所 高杂质盐矿大型储气库双井建造方法
CN112227985A (zh) * 2020-10-12 2021-01-15 中国科学院武汉岩土力学研究所 超深盐矿对接井采卤全水平段扩槽方法
WO2021042205A1 (fr) * 2019-09-04 2021-03-11 Inter-Casing Pressure Control Inc. Systèmes et procédés de régulation de pression entre tubage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005055131B4 (de) * 2005-11-15 2009-02-12 BBC Beratung für Bergbau und Chemie GmbH Vorrichtung und Verfahren zum Fördern löslicher Bodenschätze durch Solen
CN101988385B (zh) * 2009-08-07 2012-07-25 中国瑞林工程技术有限公司 岩溶大水矿山透气方法
CN111350506A (zh) * 2020-03-13 2020-06-30 海南矿业股份有限公司 一种采空区顶板处理炮孔布置方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4290650A (en) * 1979-08-03 1981-09-22 Ppg Industries Canada Ltd. Subterranean cavity chimney development for connecting solution mined cavities
EP0111353A2 (fr) * 1982-12-13 1984-06-20 Shell Internationale Researchmaatschappij B.V. Dispositif de détection de l'interface entre fluide de couverture et saumure dans un procédé d'exploitation minière par dissolution
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL251207A (fr) * 1959-05-07

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4290650A (en) * 1979-08-03 1981-09-22 Ppg Industries Canada Ltd. Subterranean cavity chimney development for connecting solution mined cavities
EP0111353A2 (fr) * 1982-12-13 1984-06-20 Shell Internationale Researchmaatschappij B.V. Dispositif de détection de l'interface entre fluide de couverture et saumure dans un procédé d'exploitation minière par dissolution
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110175428A1 (en) * 2010-01-20 2011-07-21 Harvey Haugen Solution Mining and a Crystallizer for Use Therein
CN104847358A (zh) * 2015-06-08 2015-08-19 中国科学院青海盐湖研究所 杂卤石开采方法
CN107701189A (zh) * 2017-10-31 2018-02-16 中国科学院武汉岩土力学研究所 高杂质盐矿大型储气库双井建造方法
WO2021042205A1 (fr) * 2019-09-04 2021-03-11 Inter-Casing Pressure Control Inc. Systèmes et procédés de régulation de pression entre tubage
CN112227985A (zh) * 2020-10-12 2021-01-15 中国科学院武汉岩土力学研究所 超深盐矿对接井采卤全水平段扩槽方法
CN112227985B (zh) * 2020-10-12 2021-10-22 中国科学院武汉岩土力学研究所 超深盐矿对接井采卤全水平段扩槽方法

Also Published As

Publication number Publication date
DE19831234A1 (de) 2000-01-13
ES2213314T3 (es) 2004-08-16
DE19831234C2 (de) 2002-05-16
EP0974731A3 (fr) 2001-06-13
EP0974731B1 (fr) 2003-12-17
DE59908069D1 (de) 2004-01-29

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