Systems and methods for an artificial geothermal energy reservoir created using hot dry rock geothermal resources
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65G-005/00
E21B-036/00
E21B-043/30
E21F-017/16
F03G-004/00
F24J-003/08
F03G-007/04
출원번호
US-0636331
(2011-03-17)
등록번호
US-8881805
(2014-11-11)
국제출원번호
PCT/US2011/028841
(2011-03-17)
§371/§102 date
20121116
(20121116)
국제공개번호
WO2011/119409
(2011-09-29)
발명자
/ 주소
Klemencic, Paul M.
출원인 / 주소
Skibo Systems LLC
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
1인용 특허 :
19
초록▼
Methods are described for using heated fluids from enhanced geothermal systems projects that recover geothermal heat from hot dry rock resources, and then injecting the heated pressurized fluids into a suitable rock formation to create an artificial geothermal energy reservoir. The artificial geothe
Methods are described for using heated fluids from enhanced geothermal systems projects that recover geothermal heat from hot dry rock resources, and then injecting the heated pressurized fluids into a suitable rock formation to create an artificial geothermal energy reservoir. The artificial geothermal reservoir can then be used to store thermal energy by boosting the enthalpy of injected fluids by exchanging against heated fluids from other sources including a solar thermal power plant. Recovered heated fluids are utilized in a geothermal power plant and the spent geothermal fluids can be injected to recover additional thermal energy from hot dry rock resources. One embodiment is a geosolar electric power generation project to provide a steady and flexible source of renewable energy from a hot dry rock geothermal source integrated with a concentrating solar power project.
대표청구항▼
1. A method of storing thermal energy comprising: pre-heating pressurized sub-critical fluids using geothermal heat sources; andinjecting the pre-heated pressurized sub-critical fluids into a rock formation to create a pre-heated artificial geothermal reservoir containing the pre-heated fluids in a
1. A method of storing thermal energy comprising: pre-heating pressurized sub-critical fluids using geothermal heat sources; andinjecting the pre-heated pressurized sub-critical fluids into a rock formation to create a pre-heated artificial geothermal reservoir containing the pre-heated fluids in a temperature range of 100 to 200 degrees C.;wherein the rock formation either is permeable, or is relatively impermeable but either has natural fractures or is artificially fractured to allow the pre-heated fluids to flow through the rock formation to displace fluids in the fractures, resulting in an accumulation of the pre-heated injected fluids; andwherein the pre-heated fluids are heated by geothermal heat sources comprising geothermal energy recovered from geothermal hot dry rock formations, or a geothermal brine removed from a geothermal power plant. 2. The method of claim 1, wherein the pre-heated fluids are supplied from at least one of a surface source of water or brine selected from the group consisting of: naturally occurring bodies of water including seawater; processed water including partially desalinated seawater; wastewater from industrial, mining, or oil and gas production facilities; and wastewater from sewage treatment facilities. 3. The method of claim 1, wherein the rock formation is in a naturally occurring aquifer or brine reservoir, and has formation fluids present and contains aqueous fluids such as water or brine, the method further comprising: producing the formation fluids from one or more production wells,heating the formation fluids,re-injecting the heated formation fluids into the reservoir using injection wells, andcirculating the heated formation fluids to accumulate thermal energy in the reservoir. 4. The method of claim 1, further comprising: producing fluids from a subsurface source of water or brine in a separate rock formation, including naturally occurring aquifers and brine reservoirs, andheating the fluids for injection into the artificial geothermal reservoir rock formation. 5. The method of claim 1, wherein the pre-heated fluids are heated fluids recovered from a power plant operation in the form of at least one of pressurized hot water, pressurized brine, and steam, such that the injected pre-heated fluids have a pressure sufficient to inject and penetrate into the rock formation to create the pre-heated artificial geothermal reservoir. 6. The method of claim 5, wherein the pre-heated fluids are heated by pressurized brine from a geothermal power plant pumped to a pressure sufficient for injection, the method further comprising: using the pressurized brine to preheat the artificial geothermal reservoir rock formation, prior to injecting a higher-temperature heated fluid. 7. The method of claim 1, wherein the pre-heated fluids are heated by a process for recovering thermal energy from hot dry rock formations comprising: injecting fluids into a hot dry rock formation that has been hydraulically fractured to open sealed fractures or create new fractures in the hot dry rock formation;circulating the fluids through the fractures and recovering the heated fluids in at least one production well; andinjecting at least a portion of the heated fluids into the artificial geothermal reservoir rock formation. 8. The method of claim 7 further comprising: utilizing at least a portion of the heated fluids from the hot dry rock formation in a geothermal power plant; andsubsequently injecting brine from the power plant into the artificial geothermal reservoir. 9. The method of claim 7 further comprising using two or more hot dry rock zones connected by at least one of wells, fractured well zones, and fractured rock zones permitting fluids flow from one hot dry rock zone to another hot dry rock zone; or wherein the hot dry rock zones are segregated by temperature, the lower temperature hot dry rock zones are used to heat the fluids injected into the artificial geothermal reservoir; orwherein some hot dry rock zones have lower fluid circulation rates leading to higher temperatures, and some hot dry rock zones have a higher fluid circulation rates leading to intermediate temperatures, the different temperature produced fluids are segregated, and at least one of the segregated fluids is injected into the artificial geothermal reservoir. 10. The method of claim 7 further comprising: reversing the fluid flow through at least one of the fractured hot dry rock zones; andrecovering heated fluids from at least one reversed injection well and injecting fluids into at least one reversed production well. 11. The method of claim 5, further comprising: storing at least a portion of the thermal energy from heat sources by heating thermal energy storage media; andrecovering the stored thermal energy from the thermal energy storage media at a subsequent time and using the recovered thermal energy to heat the pre-heated fluids. 12. A method of storing thermal energy comprising: injecting pre-heated pressurized sub-critical fluids into a rock formation to create a pre-heated artificial geothermal reservoir containing the pre-heated fluids in a temperature range of 100 to 200 degree C., wherein the rock formation either is permeable or is relatively impermeable, but either has natural fractures or is artificially fractured to allow the pre-heated fluids to flow through the rock formation to displace fluids in the fractures, resulting in an accumulation of the pre-heated fluids; andheating and storing thermal energy in the pre-heated artificial geothermal reservoir by injecting higher-temperature or higher-enthalpy heated fluids to create a hot zone in the artificial geothermal reservoir and increase the artificial geothermal reservoir hot zone temperatures into the range of 180 to 320 degrees C. 13. The method of claim 12, further comprising storing additional thermal energy in the pre-heated artificial geothermal reservoir by heating the injected fluids using thermal energy from at least one of these heat sources: thermal energy removed from a thermal power plant by exchanging the injection fluids against hot working fluids extracted from the thermal power plant; or exchanging against heat transfer fluids that were heated using hot working fluids extracted from a thermal power plant;thermal energy from a concentrated solar thermal collection system by either using the pre-heated fluids as a collection fluid, or by using an intermediate heat transfer fluid as the collection fluid wherein the heat transfer fluid exchanges thermal energy with the injection injected fluids;thermal energy from flue gas or exhaust gas heat recovery units on fired heaters or gas turbines; andthermal energy recovered from higher-temperature hot dry rock formations followed by injecting and circulating the higher-temperature fluids through the pre-heated artificial geothermal reservoir to sweep the pre-heated fluids from the hot zone of the artificial geothermal reservoir. 14. The method of claim 13, further comprising: using thermal energy from a thermal energy storage to further heat the injected fluids thereby transferring the stored thermal energy into the pre-heated artificial geothermal reservoir. 15. The method of claim 12, further comprising: recovering the stored heated fluids from the hot zone of the artificial geothermal reservoir; andutilizing the heated fluids in at least one geothermal power plant to produce electricity. 16. The method of claim 15, wherein segregated fluid production systems are used to recover heated fluids inside of the hot zone at a higher temperature than fluids recovered outside of the hot zone, and each source of recovered fluids is a separate feed to the geothermal power plant. 17. The method of claim 15, further comprising using a Geosolar Injection Method to store thermal energy, recover thermal energy, and utilize thermal energy from the artificial geothermal reservoir to generate electricity, wherein the Geosolar Injection Method comprises at least one of: reversing hot zone injection wells to recover the heated fluids prior to reaching thermal equilibrium within the hot zone;injecting steam into the hot zone to form a steam chest, and reversing the injection wells to produce the steam before reaching thermal equilibrium and collapsing the steam chest;injecting heated fluids in a central region of the hot zone, and recovering the heated fluids from a peripheral region of the hot zone to circulate heated fluids within the hot zone;injecting spent brine from the at least one geothermal power plant into flanks of the artificial geothermal reservoir; and injecting pre-heated fluids into pre-heated zones in the artificial geothermal reservoir continuously or periodically to circulate fluids through the pre-heated zones;alternating an injection of heated brine with an injection of heated pressurized water or steam; andusing multiple hot zones in the artificial geothermal reservoir, staging the hot zones to provide a continuous source of heated fluids production to the at least one geothermal power plant. 18. The method of claim 15, further comprising: utilizing recovered thermal energy in at least one geothermal power plant to generate electricity; andusing a Basic Geosolar Method to integrate the geothermal power plant into a geosolar project that includes at least one concentrated solar thermal power plant and a thermal energy storage system, wherein the Basic Geosolar Method comprises at least one of: extracting partially expanded working fluids from the at least one concentrated solar thermal power plant, and using thermal energy contained in the working fluids to charge multiple stages of thermal energy storage modules;using thermal energy storage modules to store thermal energy in each stage having a specified temperature range associated with that stage;repositioning the thermal energy storage modules in a cascaded arrangement, wherein the thermal energy storage modules are switched into a higher temperature range stage after charging in a current temperature range stage, or a lower temperature range stage after discharging in the current temperature range stage;using temperature stages of the thermal energy storage modules to heat the pre-heated fluids or the heated fluids injected to form and replenish the hot zone;using the higher temperature range stage of the thermal energy storage modules to supply thermal energy to the solar thermal power plant or the geothermal power plant for at least one of purposes of providing supplemental thermal feed, extending power plant operation, increasing thermal feed, and increasing electricity generated; andusing thermal energy storage modules to temporarily store thermal energy, and continuously heat injected fluids during peak solar seasonal storage.
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이 특허에 인용된 특허 (19)
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Gilli Paul V. (Obere Teichstrasse 21/i 8010 Graz ATX) Beckmann Georg (Vienna ATX), Method and apparatus for peak-load coverage and stop-gap reserve in steam power plants.
Foster John W. (2 Highlands Close Crowborough ; Sussex GB2), Method for producing a geothermal reservoir in a hot dry rock formation for the recovery of geothermal energy.
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