Subsurface freeze zone using formation fractures
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-036/00
E21B-043/26
출원번호
UP-0343127
(2008-12-23)
등록번호
US-7647972
(2010-02-22)
발명자
/ 주소
Kaminsky, Robert D.
출원인 / 주소
ExxonMobil Upstream Research Company
인용정보
피인용 횟수 :
23인용 특허 :
41
초록▼
A method of lowering the temperature of a subsurface formation, e.g., a subsurface formation including oil shale, includes completing a well having fluid communication with the subsurface formation at a first depth and a second lower depth. A fracturing fluid is injected into the well so as to form
A method of lowering the temperature of a subsurface formation, e.g., a subsurface formation including oil shale, includes completing a well having fluid communication with the subsurface formation at a first depth and a second lower depth. A fracturing fluid is injected into the well so as to form a fracture at a depth of the subsurface formation, and thereby provides fluid communication between the first and second depths in the well. A cooling fluid is circulated under pressure through the well and into the fracture so as to cause the cooling fluid to flow from the well, into subsurface formation at the first depth, to the subsurface formation at the second depth, and back into the well, thereby lowering the temperature of the subsurface formation.
대표청구항▼
What is claimed is: 1. A method of lowering the temperature of a subsurface formation, the subsurface formation comprising oil shale, the method comprising: completing a well having fluid communication with the subsurface formation at a first depth and a second lower depth; injecting a fracturing f
What is claimed is: 1. A method of lowering the temperature of a subsurface formation, the subsurface formation comprising oil shale, the method comprising: completing a well having fluid communication with the subsurface formation at a first depth and a second lower depth; injecting a fracturing fluid into the well so as to form a fracture at a depth of the subsurface formation, and thereby providing fluid communication between the first and second depths in the well; and circulating a cooling fluid under pressure through the well and into the fracture so as to cause the cooling fluid to flow from the well, into subsurface formation at the first depth, to the subsurface formation at the second depth, and back into the well, thereby lowering the temperature of the subsurface formation. 2. The method of claim 1, wherein: the well is substantially vertical within the subsurface formation; and the fracture is substantially vertical. 3. The method of claim 1, wherein the fracture is substantially vertical. 4. The method of claim 1, wherein the fracture fluid contains proppant. 5. The method of claim 1, wherein the cooling fluid is comprised at least of 50 mole percent of methane, ethane, propane, propylene, ethylene, isobutane, or a mixture thereof. 6. The method of claim 1, wherein the fracture is substantially vertical. 7. The method of claim 1, wherein the well comprises an elongated tubular member that receives the cooling fluid en route to the subsurface formation. 8. The method of claim 7, wherein the well further comprises an expansion valve in fluid communication with the tubular member through which the cooling fluid flows to cool the subsurface formation. 9. The method of claim 8, wherein the expansion valve is positioned along the tubular member proximate an upper depth of the subsurface formation. 10. The method of claim 1, wherein the cooling fluid is a slurry that comprises particles of frozen material. 11. The method of claim 10, wherein the particles are less than 50 microns in size. 12. The method of claim 10, wherein the cooling fluid defines a partially frozen salt-water mixture, a partially frozen alcohol-water mixture, or a partially frozen glycol-water mixture. 13. The method of claim 10, wherein the particles are formed through a process of mechanical grinding. 14. The method of claim 10, wherein the particles have a composition different than the cooling fluid. 15. The method of claim 10, wherein the composition of the particles has a freezing temperature that is higher than the cooling fluid, and the particles are formed by rapidly cooling the cooling fluid below the freezing temperature of the particles, but not below the freezing temperature of the cooling fluid. 16. The method of claim 10, wherein the particles are seeded into the cooling fluid in a frozen state. 17. The method of claim 10, wherein the particles comprise a biphasic material having an external portion and an internal portion such that the external portion has a higher freezing temperature than the internal portion. 18. The method of claim 1, wherein the cooling fluid is a liquid selected from the group consisting of an alcohol, an alcohol mixture, or an alcohol-water mixture. 19. The method of claim 1, wherein the cooling fluid comprises a eutectic mixture. 20. The method of claim 1, wherein the fracturing fluid comprises a proppant to prop the formation. 21. The method of claim 1, wherein the well is formed outside of an area under shale oil development. 22. The method of claim 1, wherein the subsurface formation comprises in situ water, and the cooling fluid cools the subsurface formation sufficient to freeze at least a portion of the in situ water. 23. The method of claim 22, further comprising: injecting low-salinity water into at least a portion of the subsurface formation to reduce a natural salinity of the in situ water and to raise the freezing temperature of the in situ water.
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