EP3204596A1 - Chauffage de gisement - Google Patents

Chauffage de gisement

Info

Publication number
EP3204596A1
EP3204596A1 EP15794866.2A EP15794866A EP3204596A1 EP 3204596 A1 EP3204596 A1 EP 3204596A1 EP 15794866 A EP15794866 A EP 15794866A EP 3204596 A1 EP3204596 A1 EP 3204596A1
Authority
EP
European Patent Office
Prior art keywords
alternating current
alternator
conductor
soil
conductor loop
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
EP15794866.2A
Other languages
German (de)
English (en)
Other versions
EP3204596B1 (fr
Inventor
Dirk Diehl
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP3204596A1 publication Critical patent/EP3204596A1/fr
Application granted granted Critical
Publication of EP3204596B1 publication Critical patent/EP3204596B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/04—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
    • H05B2214/03—Heating of hydrocarbons

Definitions

  • Heating reservoir The invention relates to a deposit heating for inductive heating of the soil, in particular an oil sands, oil shale ⁇ , Schwerstöl- or heavy oil reservoir.
  • Heavy oils or bitumen from oil sands or oil shale deposits it is necessary to achieve the greatest possible flowability of the hydrocarbons to be pumped.
  • One way to improve the fluidity of the hydrocarbons in their promotion is to increase the temperature prevailing in the soil of the deposit by means of a deposit heating.
  • a known method for increasing the temperature of the storage site or the soil is the inductive Hei ⁇ zen means of an inductor, which in the deposit, that is in the soil, is introduced.
  • the Induk ⁇ tors eddy currents are induced in electrically conductive deposits, which heat the deposit, so that there is thus an improvement in the flowability of the present in the reservoir hydrocarbons.
  • the inductor To ensure a sufficient rise in temperature of the earth to keep it ⁇ high heat outputs are typically required. Due to the high voltage amplitude occurring thereby, the inductor must have a sufficient electrical insulation with respect to the ground. The electrical insulation of the inductor consequently limits its heating power to a maximum heating power.
  • the present invention has for its object to increase the maximum heat output of a deposit heating.
  • the object is achieved by a deposit heating with the features of independent claim 1 and by a method having the features of independent claim 8 and by use with the features of independent claim 14.
  • advantageous refinements and developments of the invention are given.
  • a deposit heating invention for inductive Hei-wetting of a soil comprises at least a first and second alternating-current generator and at least partially disposed within the soil electrical conductor loop ⁇ .
  • the conductor loop with the ers ⁇ th and second alternator is such electrically overall couples, that the conductor loop in a first region with ⁇ means of the first alternating current generator having a first Wech ⁇ selstrom and in a second region by the second alternator with a second AC
  • the energization that is the Beauf ⁇ suppression of the conductor loop with an electrical alternating current, by means of a first and second Messtromgenera ⁇ sector.
  • the first alternator is preferably arranged on the first region and the second alternator preferably on the second region of the conductor loop.
  • the limited and already existing insulation or insulation capability of the conductor loop is used as optimally as possible. If the maximum heating power of the deposit heating is not to be increased, the electrical insulation of the conductor loop with regard to its electrical insulation capability can advantageously be reduced due to the reduction of the voltage amplitudes.
  • the requirement for electrical isolation within the alternators can be reduced.
  • the maximum heat output which is limited by said isolati ⁇ on, for example, by a factor of two by means of the dual energizing.
  • the conductor loop extending from the first Kasstromge ⁇ erator to the second ac generator and the second AC generator back to the first alternator.
  • the conductor loop has a first conductor section and a second conductor section.
  • the first Lei ⁇ terabites extends from the first alternating-current generator to the second alternator.
  • the second conductor portion extends from the second alternator to the first alternator. The first and second conductor section thus form the conductor loop.
  • a first alternator generates a first alternating current and a second alternator gate a second alternating current.
  • a nozzles partially disposed within a soil conductor loop in a first region with the first alternating Selstrom and acted upon in a second area with the second alternating current.
  • Deposit heating uses a reservoir heater according to the present invention to reduce the viscosity of a hydrocarbonaceous substance present in a soil.
  • the hydrocarbonaceous substance may be heavy oils,
  • the koh ⁇ lenwasserstoff Anlagen substance comprises at least hydrocarbons, which are provided for support, particularly for in-situ production.
  • the first and second regions are arranged disjointly along the conductor loop.
  • the conductor loop is acted on at a first location by means of the first alternating current generator with a first alternating current and at a second location different from the first location by means of the second alternating current generator with the second alternating current.
  • the first and second alternator are advantageously not immediately one behind the other, that is arranged generously spaced from each other.
  • the first and second alternator are arranged outside the earth ⁇ rich.
  • the alternators can advantageously be arranged spaced from each other without further holes. Furthermore, the above-ground arrangement of the alternators allows easy access to the alternators, for example, for maintenance.
  • the second AC generator is arranged in a region (second region) of the conductor loop, which is at a given geometry of the conductor loop as far as possible from the first AC generator, that is spaced from the first region. This will advantageously be converted, the geometry of the loop by the presence of the second ⁇ be alternator not changed or adversely affected.
  • the conductor must not ⁇ loop due to the dual electric energization to a simple electric current supply to or only slightly extended.
  • the first alternator outside and the second alternator within the soil is arranged.
  • the waste heat of the second Wech ⁇ selstromgenerators which is generated during the operation of the second alternating current generator ⁇ .
  • the heating of the soil is advantageously improved or supported by the arranged in the ground second alternator. Conversion losses, which occur in the second alternator, thus remain in the reservoir or in the ground.
  • conductor portions of the conductor loop which conductor portions are arranged between the first and second alternator, are of identical design with respect to their conductor length.
  • the first and second AC generators are arranged symmetrically along the conductor loop.
  • the first conductor portion extends from the first alternator to the second alternator and the second conductor portion extends from the second alternator back to the first alternator.
  • the first and second conductor sections have approximately the same conductor length. Consequently, by means of the two alternators, a symmetrical one with respect to the length of the conductor loop takes place
  • the voltage amplitudes at the alternators and / or in the first and second conductor sections are advantageously approximately halved compared to a simple energization.
  • the first and / or second alternator comprises / comprises a frequency converter.
  • the frequency of the first and / or second alternating current can be adapted to a resonance frequency of the conductor loop.
  • the Lei ⁇ terschleife at least one capacitor.
  • the Induktivi ⁇ ty of the electrical resonant circuit is formed by the Induktivi ⁇ ty of the loop itself.
  • the first and second alternator have a distance of at least 100 m.
  • the first and second alternator are operated in phase.
  • a phase-coupled operation of the first and second alternator is characterized in that the phase ⁇ difference between the phase of the first and second alternating current temporally not or only slightly varies.
  • ⁇ transmits the phase difference between the first and second alternating current preferably from 0 ° or 180 °, at the same Pola ⁇ the alternators rity 0 ° and is preferably at the opposite polarity of the AC generators 180 °. This advantageously ensures that an ad ⁇ dition of the voltage amplitudes and not a mutual cancellation (difference) of the voltage amplitudes of the alternators.
  • the first and second alternating current are generated at the same frequency.
  • the conductor loop advantageously bezügli ⁇ cher the voltage amplitude is energized symmetrical.
  • the conductor loop is subjected to a first and / or second alternating ⁇ current, wherein the frequency of the first and / or second alternating current in the range of 10 kHz to 200 kHz.
  • a frequency in the range of 10 kHz to 200 kHz which corresponds to the resonant frequency of the conductor loop, wherein for forming an electrical resonant circuit, the conductor loop comprises at least one capacitor. This can be done a reactive power compensation.
  • the frequency of the alternating currents compared to known methods for deposit heating is relatively low.
  • this safety distances, which must be met at higher frequencies, can be reduced.
  • the safe ⁇ ness of the deposit heating is improved. Is advantageously a voltage amplitude of the first and two ⁇ th alternating current which (10 kV) be carrying at least 10 kilovolts ⁇ .
  • Figure 1 is a three-dimensional representation of a
  • Deposit heater comprising two AC generator ⁇ ren for operating a conductor loop;
  • FIG. 2 is a simplified electrical equivalent circuit diagram of
  • Figure 3 is a simplified electrical equivalent circuit diagram ei ⁇ ner deposit heater comprising four alternating current generators for the operation of a conductor loop.
  • FIG. 1 shows a schematic three-dimensional representation of a deposit heater 1, which comprises a first and a second AC generator 21, 22 for operating a conductor loop 4.
  • the conductor loop 4 is at least partially introduced into a soil 46 of the deposit.
  • the soil 46 comprises a hydrocarbon-containing substance, that is to say hydrocarbons to be transported, for example heavy oils, heavy oils, bitumen, oil sands and / or oil shale.
  • the ground 46 may be a geological formation and / or a kohlenwas ⁇ serstoff Anlagen layer of soil 42, in particular a plurality of earth layers 41, ..., 43 include.
  • the conductor loop 4 extends at least through and / or within a layer of soil 42, the hydrocarbons to be promoted hydrogens ⁇ , especially heavy oils, heavy oils, bitumen, oil sands or oil shale deposits, has.
  • the hydrocarbonaceous earth layer 42 is from an overlying one Earth layer 41 and an underlying layer of soil 43 surrounded.
  • the soil 46 comprises the said earth layers 41, ..., 43.
  • the conductor loop 4 forms an inductor 4, wherein the conductor loop 4, for example at a depth of 50 m to 85 m, is introduced into the soil 46.
  • the conductor loop 4 for forming an electrical resonant circuit, which is provided for reactive power compensation, a plurality of capacitors.
  • the conductor loop 4 has a first and a second conductor section 44, 45.
  • the first and second conductor section 44, 45 extends from the second alternator 22 back to the first alternator 21.
  • the first and second conductor section 44, 45 in this case form the conductor loop 4 from.
  • the first AC generator 21 is arranged in a first region 31 and the second AC generator 22 in a second region 32 of the conductor loop 4.
  • the first and second conductor sections 44, 45 reach their greatest distance, for example of 50 m, in the earth layer 42, which has the hydrocarbons to be conveyed.
  • the first and second alternators 21, 22 are disposed outside of the soil 46 and within an air layer 40 surrounding the reservoir 1.
  • the first and second alternators 21, 22 are operated in phase-locked mode, that is to say that the phase difference between the first alternating current generated by the first alternating-current generator 21 and the second alternating-current generated by the second alternating-current generator 22 does not vary or only slightly varies over time.
  • the means of the First and second AC generators 21, 22 generated alternating currents have the same frequency and current amplitude.
  • the first and second AC Gene ⁇ rator 21, 22 is approximately the same voltage amplitude, wherein different voltage amplitudes may be provided.
  • the conductor loop 4 can be energized by means of more than two alternators. This advantageously further reduces the respective voltage amplitudes at the AC generators and in the conductor sections between the AC generators.
  • N alternators are used, the electrical requirements can verrin- to the insulation of the conductor loop 4 against the ground 46 by a factor 1 / N like, if the effective voltage is higher than the reactive voltage of the respective conductor section between in each case two alternating ⁇ power generators.
  • N is a natural number greater than or equal to two.
  • At least a portion of the N alternators may be disposed within the soil 46. As a result, losses, for example conversion losses of frequency converters arranged in the alternators, are released to the ground 46 before ⁇ geous.
  • Figure 2 shows a schematic equivalent electrical circuit diagram of the conductor loop 4 of Figure 1. This comprises the conductor ⁇ loop 4, a plurality of capacitors 52.
  • the conductor loop 4 of Figure 1 comprises the conductor ⁇ loop 4, a plurality of capacitors 52.
  • Inductors 51 are formed by the conductor loop 4 itself.
  • the conductor loop 4 is acted upon in each case by means of the Kirstromge ⁇ generators 21, 22 each with an alternating current.
  • the capacitors 52 and inductors 51 form an electrical series resonant circuit with a predetermined by the capacitors 52 and inductors 51 resonant frequency. It is an advantage to use the first and second Power generator 21, 22 to operate at the resonant frequency of said electrical series resonant circuit. This results in a particularly advantageous reactive power compensation.
  • the first and second alternating current generator 21, 22 with respect to the conductor length of the conductor loop 4 symmetrically ⁇ arranged, that is, that the first conductor portion 44 has the We ⁇ sentlichen the same conductor length as the secondêtab ⁇ cut 45th
  • FIG. 3 shows a schematic electrical equivalent circuit of a conductor loop 4, which is in each case subjected to an alternating current in four regions 31,..., 34.
  • the conductor loop 4 with a first, second, third and fourth alternator 21, ..., 24 is electrically coupled.
  • the lying between each two alternators conductor sections preferably have the same conductor length.
  • the alternators 21,..., 24 are arranged symmetrically along the conductor loop 4. They thus split the conductor loop 4 into the conductor sections of the same length.
  • the conductor loop 4 has a plurality of capacitors 52 and
  • the third and fourth Kirstromgenera ⁇ gate 33, 34 can preferably be in the soil 46, that is underground, be disposed.
  • the loop conductor 4 can be electrically coupled to more than four alternating ⁇ power generators. In other words, there is an N-fold energization of the conductor loop 4. Since ⁇ by the electrical requirement for the isolation of the conductor loop 4 against the soil 46 can be reduced by a factor of 1 / N.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Road Paving Machines (AREA)

Abstract

L'invention concerne un chauffage de gisement (1) servant à chauffer par induction un sol (46), comprenant au moins un premier et un deuxième générateur de courant alternatif (21, 22) et une boucle conductrice (4) électrique agencée au moins en partie à l'intérieur du sol (46). Selon l'invention, la boucle conductrice (4) est couplée au premier et au deuxième générateur de courant alternatif (21, 22), de telle manière que la boucle conductrice (4) peut être soumise dans une première zone (31) au moyen du premier générateur de courant alternatif (21) à un premier courant alternatif et dans une deuxième zone (32) au moyen du deuxième générateur de courant alternatif (22) à un deuxième courant alternatif. L'invention concerne en outre un procédé permettant de faire fonctionner un chauffage de gisement (1) ainsi qu'une utilisation dudit chauffage de gisement (1).
EP15794866.2A 2014-11-19 2015-11-06 Chauffage de gisement Not-in-force EP3204596B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014223621.5A DE102014223621A1 (de) 2014-11-19 2014-11-19 Lagerstättenheizung
PCT/EP2015/075915 WO2016078934A1 (fr) 2014-11-19 2015-11-06 Chauffage de gisement

Publications (2)

Publication Number Publication Date
EP3204596A1 true EP3204596A1 (fr) 2017-08-16
EP3204596B1 EP3204596B1 (fr) 2018-12-26

Family

ID=54545102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15794866.2A Not-in-force EP3204596B1 (fr) 2014-11-19 2015-11-06 Chauffage de gisement

Country Status (6)

Country Link
US (1) US20170328175A1 (fr)
EP (1) EP3204596B1 (fr)
CA (1) CA2968147C (fr)
DE (1) DE102014223621A1 (fr)
RU (1) RU2673091C1 (fr)
WO (1) WO2016078934A1 (fr)

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Also Published As

Publication number Publication date
CA2968147C (fr) 2018-09-25
WO2016078934A1 (fr) 2016-05-26
EP3204596B1 (fr) 2018-12-26
RU2673091C1 (ru) 2018-11-22
DE102014223621A1 (de) 2016-05-19
CA2968147A1 (fr) 2016-05-26
US20170328175A1 (en) 2017-11-16

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