IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0335864
(2011-12-22)
|
등록번호 |
US-8851177
(2014-10-07)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
208 |
초록
▼
The invention relates to methods for extracting a kerogen-based product from subsurface shale formations. The methods utilize in-situ reactions of kerogen involving liquid phase chemistry at formation temperatures and pressures. These methods rely on chemically modifying the shale-bound kerogen to r
The invention relates to methods for extracting a kerogen-based product from subsurface shale formations. The methods utilize in-situ reactions of kerogen involving liquid phase chemistry at formation temperatures and pressures. These methods rely on chemically modifying the shale-bound kerogen to render it mobile, using chemical oxidants. In one embodiment, an oxidant is provided to the subsurface shale formation comprising kerogen in an inorganic matrix, the oxidant converting the kerogen to form organic acids, and forming a mobile kerogen-based product. The spent oxidant is regenerated in-situ to restore at least some of the original oxidation activity. At least a portion of the mobile kerogen-based product is recovered. The kerogen-derived product can be upgraded to provide commercial products.
대표청구항
▼
1. 1. A process for extracting a kerogen-based product from a subsurface shale formation comprising subsurface shale, the process comprising the steps of: providing a first oxidant to kerogen in subsurface shale;contacting the kerogen in the subsurface shale with the first oxidant at a temperature i
1. 1. A process for extracting a kerogen-based product from a subsurface shale formation comprising subsurface shale, the process comprising the steps of: providing a first oxidant to kerogen in subsurface shale;contacting the kerogen in the subsurface shale with the first oxidant at a temperature in the range from 0° C. and 200° C. to form organic acids;mobilizing at least a portion of the organic acids from the subsurface shale to produce a mobile kerogen-based product; andregenerating the first oxidant in the subsurface shale, wherein the first oxidant is a permanganate oxidant. 2. The process according to claim 1, further comprising providing the first oxidant to the kerogen combined with a carrier fluid selected from the group consisting of an aqueous fluid, an ethanol fluid or combinations thereof. 3. The process according to claim 2, wherein the carrier fluid contains in the range from 0.1 wt. % to 40 wt. % of the first oxidant. 4. The process according to claim 2, wherein the carrier fluid has a pH in the range from 7 to 14. 5. The process according to claim 1, wherein the permanganate oxidant is provided to the kerogen in aqueous solution that contains in the range from 0.1 wt. % to 40 wt. % permanganate, expressed in terms of the weight of anhydrous permanganate salt dissolved in the solution. 6. The process according to claim 1, wherein the permanganate oxidant is selected from the group consisting of ammonium permanganate, NH4MnO4; calcium permanganate, Ca(MnO4)2; potassium permanganate, KMnO4; and sodium permanganate, NaMnO4. 7. The process according to claim 1, further comprising providing the first oxidant to the kerogen at a pH in a range from 7 to 14. 8. The process according to claim 7, further comprising maintaining the pH in the range from 7 to 14 by providing an alkaline material selected from the group consisting of a carbonate, a bicarbonate, an oxide and a hydroxide to the subsurface shale. 9. The process according to claim 7, further comprising providing the first oxidant to the kerogen at a pH in a range from 7 to 9. 10. The process according to claim 1, further comprising contacting the kerogen with the first oxidant for a period of at least 4 hours. 11. The process according to claim 1, wherein the step of regenerating the first oxidant further comprises the steps of: providing a second oxidant to the subsurface shale; and regenerating the first oxidant in the subsurface shale with the second oxidant. 12. The process according to claim 11, further comprising providing the second oxidant to the kerogen in a carrier fluid selected from the group consisting of an aqueous fluid, an ethanol fluid, or combinations thereof. 13. The process according to claim 11, further comprising providing the second oxidant to the kerogen as a gaseous oxidant. 14. The process according to claim 11, wherein the second oxidant is selected from the group consisting of peroxides, ozone and oxygen. 15. The process according to claim 11 further comprising providing the second oxidant at a temperature in a range from 0° C. to 200° C. 16. The process according to claim 11, further comprising providing the second oxidant to the subsurface shale for a time of at least 4 hours. 17. The process according to claim 1, further comprising regenerating the first oxidant at a pH in a range from 6 to 8. 18. The process according to claim 17, further comprising maintaining the pH in the range from 6 to 8 by supplying an alkaline material selected from the group consisting of a carbonate, a bicarbonate, an oxide and a hydroxide to the subsurface shale. 19. The process according to claim 17, further comprising maintaining the pH in the range from 6 to 8 by supplying an acidic material selected from the group consisting of a mineral acid, an organic acid, and combinations thereof to the subsurface shale. 20. The process according to claim 17, further comprising maintaining the pH in the range from 6 to 8 by supplying CO.sub.2 to the subsurface shale. 21. The process according to claim 1, further comprising mobilizing at least a portion of the organic acids at a pH in the range from 7 to 14. 22. The process according to claim 21, further comprising mobilizing at least a portion of the organic acids at a pH in the range from 12 to 14, in the presence of alkaline material selected from the group consisting of a carbonate, a bicarbonate, an oxide and a hydroxide. 23. The process according to claim 1, wherein the mobile kerogen-based product contains C35− organic acids and C35+ organic acids. 24. The process according to claim 23, wherein at least 50 wt. % of the organic acids in the mobile kerogen-based product are in the C.sub. 35+ range. 25. The process according to claim 23, wherein at least 20 wt. % of the C35+ organic acids in the mobile kerogen-based product have a molecular mass number of greater than 1000 daltons. 26. The process according to claim 23, wherein at least 20 wt. % of the C35− organic acids in the mobile kerogen-based product are in the C8 to C12 range. 27. The process according to claim 1, wherein the mobile kerogen-based product contains in the range from 5 wt. % to 50 wt. % organic acids. 28. The process according to claim 1, wherein at least 30 wt. % of the organic acids in the mobile kerogen-based product are diacids. 29. The process according to claim 1, further comprising contacting the kerogen in the subsurface shale with a permanganate oxidant to form organic acids and manganese oxides, including one or more of MnO2, Mn22+, or MnO42 −. 30. The process according to claim 29, wherein the permanganate oxidant is selected from the group consisting of ammonium permanganate, NH4MnO4; calcium permanganate, Ca(MnO4)2; potassium permanganate, KMnO4; and sodium permanganate, NaMnO4. 31. The process according to claim 29, further comprising providing a second oxidant, other than permanganate, to the subsurface shale, to regenerate at least a portion of the manganese oxides to permanganate. 32. The process according to claim 29, wherein the second oxidant is selected from the group consisting of peroxides, ozone and oxygen. 33. A process for extracting a kerogen-based product from a subsurface shale formation comprising subsurface shale, the process comprising the steps of: providing a first oxidant to kerogen in subsurface shale;contacting the kerogen in the subsurface shale with the first oxidant at a temperature in the range from 0° C. and 200° C. to form organic acids;mobilizing at least a portion of the organic acids from the subsurface shale to produce a mobile kerogen-based product;recovering the mobile kerogen-based product comprising the organic acids; andregenerating the first oxidant in the subsurface shale. 34. A process for extracting a kerogen-based product from a subsurface shale formation comprising subsurface shale, the process comprising the steps of: providing a first oxidant to kerogen in subsurface shale;contacting the kerogen in the subsurface shale with the first oxidant at a temperature in the range from 0° C. and 200° C. to form organic acids;mobilizing at least a portion of the organic acids from the subsurface shale to produce a mobile kerogen-based product;regenerating the first oxidant in the subsurface shale; andrecovering the mobile kerogen-based product comprising the organic acids. 35. A process for extracting a kerogen-based product from a subsurface shale formation comprising subsurface shale, the process comprising the steps of: providing a first oxidant to kerogen in subsurface shale;contacting the kerogen in the subsurface shale with the first oxidant at a temperature in the range from 0° C. and 200° C. to form organic acids;providing a second oxidant to the kerogen in the subsurface shale to regenerate the first oxidant;contacting the kerogen in the subsurface shale with the regenerated first oxidant for a period of at least 4 hours to form organic acids;repeating the step of providing the second oxidant to the kerogen in the subsurface shale to regenerate the first oxidant at least once; and recovering a mobile kerogen-based product comprising the organic acids.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.