US20150083412A1 - Device and method for obtaining carbonic substances from oil sands - Google Patents

Device and method for obtaining carbonic substances from oil sands Download PDF

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Publication number
US20150083412A1
US20150083412A1 US14/374,902 US201214374902A US2015083412A1 US 20150083412 A1 US20150083412 A1 US 20150083412A1 US 201214374902 A US201214374902 A US 201214374902A US 2015083412 A1 US2015083412 A1 US 2015083412A1
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US
United States
Prior art keywords
steam
bitumen
pipeline
oil
production
Prior art date
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Abandoned
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US14/374,902
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English (en)
Inventor
Olaf Schmidt
Simon Schulze
Matthias Schoneich
Michael Welch
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Siemens AG
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Siemens AG
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Assigned to SIEMENS INDUSTRIAL TURBOMACHINERY LIMITED reassignment SIEMENS INDUSTRIAL TURBOMACHINERY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WELCH, MICHAEL
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS INDUSTRIAL TURBOMACHINERY LIMITED
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHULZE, Simon, SCHMIDT, OLAF, SCHÖNEICH, Matthias
Publication of US20150083412A1 publication Critical patent/US20150083412A1/en
Abandoned legal-status Critical Current

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    • 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
    • E21B43/2406—Steam assisted gravity drainage [SAGD]
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/04—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
    • C10G1/045—Separation of insoluble materials

Definitions

  • the invention relates to a device and also to a method for extracting carbonaceous substances, especially bitumen, from oil sands.
  • bitumen which typically exists with a viscosity of API 5° to 15° with respect to deposits, shall be mentioned in the following text as being representative for heavy oils, extra-heavy oils or generally long-chain hydrocarbons. By means of corresponding process steps, bitumen can be converted into synthetic crude oil.
  • Oil sand deposits are mined if they lie in strata of shallow depth, preferably by open-cast mining. Oil sand deposits, however, often lie in deeper strata which are not accessible to open-cast mining or the mining of which would be uneconomical in open-cast mining. Oil sand deposits are typically mined after depths of about 60 m by so-called in-situ processes since with these processes the removal of the surface layer, which lies above the oil sand deposit, is not necessary.
  • SAGD steam assisted gravity drainage
  • the known device for the SAGD process comprises at least one injection pipeline for feeding the superheated steam into the deposit and a production pipeline through which the fluid bitumen can be transported out of the deposit to the local surface.
  • the injection pipeline and the production pipeline are laid inside the deposit essentially parallel to each other and extending horizontally one above the other.
  • the injection pipeline and the production pipeline usually have a distance of about 5 to 10 m from each other in the vertical direction. In the horizontal direction, the pipes extend inside the deposit by a length of between several hundred meters and a few kilometers.
  • the injection pipeline is typically located above the production pipeline.
  • the bitumen flows downward on account of gravitational force and therefore towards the production pipeline and can be simply pumped out there and transported to the earth's surface.
  • the transporting can be achieved either by oil lift pumps or by introduction of an overpressure in the deposit.
  • the introduction of overpressure has the significant disadvantage, however, that earth displacements on the earth's surface (blow out) can occur in the surrounding area of the deposit, especially when the stratum above the deposit is of small thickness. For this reason, the steam pressure, before introduction into the deposit, is usually reduced by a restrictor or a throttle valve to a pressure which is lower than the rock pressure in the region of the deposit.
  • the throttle valve is arranged between the steam generator and the injection pipeline in this case. Since the steam pressure is reduced in the throttle valve, without being utilized, the process is inefficient.
  • a further disadvantage of the SAGD process is the enormous energy expenditure. For pumping out one barrel (159 l) of bitumen, about 20 m 3 of natural gas and about 3,000 l of water are required for steam production.
  • the device for extracting carbonaceous substances, especially bitumen, from oil sands, has at least one steam generator, at least one injection pipeline and at least one production pipeline—wherein via the injection pipeline steam can be introduced into the oil sand and via the production pipeline the carbonaceous substance can be removed from the oil sand—is distinguished by at least one steam turbine being arranged between the steam generator and the injection pipeline.
  • the steam turbine is preferably connected to a generator for current generation. The generated current can then be utilized directly at site for crude oil production or be fed into an electricity network.
  • the steam, which is directed from the steam generator to the steam turbine is expanded in this case inside the steam turbine to a pressure which is equal to, or lower than, the rock pressure in the region of the deposit. This steam is then directed into the deposit via the injection pipelines.
  • An advantageous embodiment of the invention provides that the steam production carried out by a heat exchanger, wherein hot exhaust gas of a heat engine, especially a gas turbine, is used for steam production.
  • a heat engine especially a gas turbine
  • the gas turbine in this case is connected to a second generator for current generation.
  • the exhaust gas of the gas turbine is used for the heating and evaporating of the water.
  • the heat energy of the exhaust gas is preferably realized by a heat exchanger in which the gas flow is conducted in counterflow to the water/steam.
  • the current which is generated in the generator can in turn be used directly at site for processing the bitumen to form crude oil, or can be fed into an electricity network.
  • the steam production can also be carried out by direct firing of the boiler.
  • the method according to aspects of the invention for extracting carbonaceous substances, especially bitumen, from oil sands by a device as claimed includes the following method steps: -Producing steam in the steam generator; -Feeding the steam to the steam turbine; -Expanding the steam in the steam turbine to a steam pressure which is lower than, or equal to, that of the rock pressure in the region of the deposit of bitumen; -Introducing the steam via the injection pipeline into the oil sand; -Heating the oil sand by the steam and breaking down the long-chain hydrocarbons of the carbonaceous substances; -Removing the carbonaceous substances (bitumen) via the production pipeline.
  • bitumen which is removed can then be processed at the earth's surface by suitable measures to form crude oil.
  • the energy of the steam which previously was discharged by the throttle valve into the environment without being utilized, can be utilized for energy recovery, especially for generating electric current by connecting the steam turbine to a generator.
  • the efficiency of the method is improved.
  • FIG. 1 shows in this case a device according to the invention for extracting carbonaceous substances, especially bitumen, from oil sands.
  • the representation is a simplified and schematic representation in which only the components which are essential for the invention are shown.
  • FIG. 1 shows an exemplary embodiment of a device according to aspects of the invention for extracting carbonaceous substances, especially bitumen, from oil sands.
  • the oil sands are located in a deposit 7 in the earth 8 . If the rock layer above the deposit 7 is not excessively large, the mining of the oil sand is carried out by open-cast mining. After a depth of about 60 m, open-cast mining is uneconomical, however, as already described, so that the in-situ process which is described in the description introduction is then used.
  • the device according to aspects of the invention for such a method has at least one steam generator 1 and at least one injection pipeline 2 and at least one production pipeline 3 .
  • the injection pipeline 2 and the production pipeline 3 usually extend horizontally inside the deposit 7 .
  • the injection pipeline 2 and the production pipeline 3 in this case extend parallel to each other and typically at a distance of about 5 to 10 m from each other. In the horizontal direction, the pipes extend inside the deposit 7 over a length of between several hundred meters and a few kilometers.
  • the bitumen Before the bitumen can be extracted from the deposit, this first of all has to be heated in order to reduce the viscosity of the bitumen which is present in the oil sand or in the oil rock. As a result of the heating, a break down of the long-chain hydrocarbons of the highly viscous bitumen occurs, as a result of which the viscosity reduces and the bitumen becomes free-flowing.
  • the heating of the deposit 7 is carried out by introduction of the steam, which is produced in the steam generator 1 , via the injection pipeline 2 .
  • the free-flowing bitumen sinks downward on account of gravitational force and can then be transported to the surface as bitumen-water emulsion. For the transporting, simple oil lift pumps are suitable.
  • the bitumen-water emulsion can then be processed in a corresponding processing plant to form crude oil.
  • the water of the water-oil emulsion is preferably recovered in the process and fed again to the steam generator 1 via a corresponding return line 10 .
  • the steam which is introduced into the deposit 7 via the injection pipeline 2 has to have a pressure which lies below the rock pressure since otherwise earth displacements on the surface (blow out) can occur. This occurs especially when the earth above the deposit 7 is of small thickness. Since the pressure of the steam downstream of the steam generator 1 is excessively high, the steam first of all has to be reduced to the corresponding rock pressure. To this end, a steam turbine 5 is arranged between the steam generator 1 and the injection pipeline 2 .
  • the steam turbine 5 is connected to a generator G 2 which serves for current generation.
  • the generated current can be used directly for the plant or be fed into an electricity network.
  • the steam turbine 5 is designed and/or controlled in such a way that the steam, which is directed from the steam generator 1 into the turbine 5 , is only expanded to such a degree that in the main it corresponds to the rock pressure inside the deposit.
  • the heat energy for the steam generator 1 is provided by the exhaust gas of a gas turbine 6 .
  • the gas turbine 6 is connected to a further generator 1 for current generation.
  • the generated current can in turn be used directly for the electric consumers of the plant or be fed into an electricity network. Since the production sites for oil sand frequently lie in regions which are not accessible to a current supply, the current is usually used directly for the plant, however.
  • the heat energy of the exhaust gas is yielded to the water or to the steam in the steam generator 1 by a heat exchanger. In this case, the hot exhaust gas preferably flows in counterflow to the water/steam. Alternatively, the steam production can also be carried out by direct firing of the boiler.
  • steam is first of all produced in the steam generator 1 .
  • the heat energy of the exhaust gas of the steam turbine 6 is fed via a heat exchanger to the steam generator 1 .
  • the water is evaporated and the hot steam is first of all fed to the steam turbine 5 .
  • a cyclone separator or the like is advantageously incorporated upstream of the steam turbine, as a result of which the water and impurities are separated from the steam.
  • the steam is dry saturated and superheated.
  • the steam turbine 5 the steam pressure is expanded, wherein the steam turbine 5 generates electric current via a generator G 2 .
  • the expanded steam which has a steam pressure which for example has the rock pressure in the deposit 7 , is introduced into the deposit 7 via the injection pipeline 2 .
  • the hot steam in this case brings about a breakdown of the long-chain hydrocarbons of the highly viscous bitumen in the oil sand.
  • a bitumen-water emulsion which trickles downward on account of gravitational force, is created in the process.
  • the bitumen-water emulsion can then be transported via the production pipeline 3 to the earth's surface.
  • an oil lift pump which is not shown in FIG. 1 , is used.
  • the bitumen-water emulsion from there makes its way to a processing plant 9 . In this, the bitumen is separated from the water on the one hand and then the bitumen is further processed to form crude oil.
  • the water is fed back to the evaporator 1 via a corresponding line 10 and can be evaporated again there.
  • the device according to aspects of the invention and the method according to aspects of the invention for extracting carbonaceous substances, especially bitumen, from oil sand are distinguished by surplus pressure energy of the steam being expanded in a steam turbine downstream of the steam generator and by the steam turbine generating additional electric energy via a generator which can especially be utilized for the device. As a result of this, an efficiency increase and therefore a more economical operation of the device are made possible.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wood Science & Technology (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
US14/374,902 2012-01-04 2012-12-17 Device and method for obtaining carbonic substances from oil sands Abandoned US20150083412A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201210000092 DE102012000092B4 (de) 2012-02-24 2012-02-24 Vorrichtung und Verfahren zur Gewinnung von kohlenstoffhaltigen Substanzen aus Ölsanden
DE102012000092.8 2012-02-24
PCT/EP2012/075687 WO2013102544A2 (de) 2012-01-04 2012-12-17 Vorrichtung und verfahren zur gewinnung von kohlenstoffhaltigen substanzen aus ölsanden

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US20150083412A1 true US20150083412A1 (en) 2015-03-26

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US (1) US20150083412A1 (de)
CA (1) CA2865290A1 (de)
DE (1) DE102012000092B4 (de)
WO (1) WO2013102544A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170328175A1 (en) * 2014-11-19 2017-11-16 Siemens Aktiengesellschaft Deposit Heater

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014656A1 (de) 2012-07-24 2014-01-30 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur Gewinnung vonkohlenstoffhaltigen Substanzen aus Ölsand
DE102012014658B4 (de) 2012-07-24 2014-08-21 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur Gewinnung von kohlenstoffhaltigen Substanzen aus Ölsand
DE102012014657A1 (de) 2012-07-24 2014-01-30 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur Gewinnung von kohlenstoffhaltigen Substanzen aus Ölsand

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086964A (en) * 1977-05-27 1978-05-02 Shell Oil Company Steam-channel-expanding steam foam drive
US4682471A (en) * 1985-11-15 1987-07-28 Rockwell International Corporation Turbocompressor downhole steam-generating system
US7077201B2 (en) * 1999-05-07 2006-07-18 Ge Ionics, Inc. Water treatment method for heavy oil production
US20060207762A1 (en) * 2004-06-07 2006-09-21 Conrad Ayasse Oilfield enhanced in situ combustion process
US20070181301A1 (en) * 2006-02-06 2007-08-09 O'brien Thomas B Method and system for extraction of hydrocarbons from oil shale

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398603A (en) * 1981-01-07 1983-08-16 Hudson's Bay Oil And Gas Company Limited Steam generation from low quality feedwater
DE102008047219A1 (de) * 2008-09-15 2010-03-25 Siemens Aktiengesellschaft Verfahren zur Förderung von Bitumen und/oder Schwerstöl aus einer unterirdischen Lagerstätte, zugehörige Anlage und Betriebsverfahren dieser Anlage
CA2692994C (en) * 2009-02-19 2015-07-21 Conocophillips Company Steam assisted oil recovery and carbon dioxide capture
US20110036095A1 (en) * 2009-08-11 2011-02-17 Zero-Co2 Llc Thermal vapor stream apparatus and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086964A (en) * 1977-05-27 1978-05-02 Shell Oil Company Steam-channel-expanding steam foam drive
US4682471A (en) * 1985-11-15 1987-07-28 Rockwell International Corporation Turbocompressor downhole steam-generating system
US7077201B2 (en) * 1999-05-07 2006-07-18 Ge Ionics, Inc. Water treatment method for heavy oil production
US20060207762A1 (en) * 2004-06-07 2006-09-21 Conrad Ayasse Oilfield enhanced in situ combustion process
US20070181301A1 (en) * 2006-02-06 2007-08-09 O'brien Thomas B Method and system for extraction of hydrocarbons from oil shale

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170328175A1 (en) * 2014-11-19 2017-11-16 Siemens Aktiengesellschaft Deposit Heater

Also Published As

Publication number Publication date
WO2013102544A3 (de) 2014-05-15
CA2865290A1 (en) 2013-07-11
DE102012000092B4 (de) 2014-08-21
WO2013102544A2 (de) 2013-07-11
WO2013102544A8 (de) 2014-06-26
DE102012000092A1 (de) 2013-08-29

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AS Assignment

Owner name: SIEMENS INDUSTRIAL TURBOMACHINERY LIMITED, UNITED

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WELCH, MICHAEL;REEL/FRAME:033920/0660

Effective date: 20140805

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SIEMENS INDUSTRIAL TURBOMACHINERY LIMITED;REEL/FRAME:033920/0699

Effective date: 20140811

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHMIDT, OLAF;SCHULZE, SIMON;SCHOENEICH, MATTHIAS;SIGNING DATES FROM 20140820 TO 20140901;REEL/FRAME:033920/0723

STCB Information on status: application discontinuation

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