Isolating lubricating oils from subsurface shale formations
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-001/04
E21B-043/16
E21B-043/22
E21B-043/34
C10M-101/02
C10M-105/04
C10M-177/00
F17D-001/16
출원번호
US-0481303
(2012-05-25)
등록번호
US-8992771
(2015-03-31)
발명자
/ 주소
Wigand, Marcus Oliver
Elomari, Saleh
Carlson, Robert Martin
출원인 / 주소
Chevron U.S.A. Inc.
인용정보
피인용 횟수 :
0인용 특허 :
208
초록▼
Disclosed herein are methods for isolating heavy saturated hydrocarbons from a subsurface shale formation comprising kerogen and an extractible organics component. These methods can be used to provide a bright stock product. The process comprises extracting an extractible organics component from sub
Disclosed herein are methods for isolating heavy saturated hydrocarbons from a subsurface shale formation comprising kerogen and an extractible organics component. These methods can be used to provide a bright stock product. The process comprises extracting an extractible organics component from subsurface shale formations comprising kerogen and the extractible organics component in an inorganic matrix and isolating a heavy hydrocarbon fraction comprising saturated beta-carotene. The methods utilize a hydrocarbon solvent to at least partially solubilize the extractible organics component. Among other factors, these processes are based on the discovery that the extractible organics is composed of a heavy hydrocarbon component containing saturated beta-carotene. The saturated beta-carotene product is a valuable commercial product. The presently disclosed processes are more environmentally benign, more economical, and more efficient in producing commercial products and in providing access to kerogen.
대표청구항▼
1. A process for isolating heavy saturated hydrocarbons from a subsurface shale formation comprising kerogen and an extractible organics component, the process comprising: a) providing a first hydrocarbon solvent to the subsurface shale formation comprising kerogen and an extractible organics compon
1. A process for isolating heavy saturated hydrocarbons from a subsurface shale formation comprising kerogen and an extractible organics component, the process comprising: a) providing a first hydrocarbon solvent to the subsurface shale formation comprising kerogen and an extractible organics component;b) at least partially solubilizing at least a portion of the extractible organics component in the first hydrocarbon solvent;c) removing the first solvent containing the extractible organics component from the subsurface shale formation to a surface facility; andd) isolating a heavy hydrocarbon fraction by distillation, wherein the heavy hydrocarbon fraction is a 900° F.+ fraction and comprises saturated beta-carotene. 2. The process of claim 1, further comprising providing a second solvent to the subsurface shale formation to remove at least a portion of the first hydrocarbon solvent from the subsurface shale formation; and removing the second solvent from the subsurface shale formation. 3. The process of claim 2, wherein the first solvent is selected from the group consisting of 2-methyltetrahydrofuran, tetrahydrofuran, dichloromethane, chloroform, acetone, carbon disulfide, benzene, toluene, xylene, pyridine, n-methyl-2-pyrrolidone (NMP), cyclopentyl methyl ether (CPME), ethyl lactate, dibasic esters (DBE), propylene carbonate, dimethyl carbonate, CO2, CO2 at supercritical conditions, and mixtures thereof and the second solvent is selected from the group consisting of methanol, ethanol, acetone, CO2, CO2 at supercritical conditions, and mixtures thereof. 4. The process of claim 3, further comprising removing the first and second solvents from the subsurface shale formation by pumping. 5. The process of claim 1, wherein the heavy hydrocarbon fraction comprises over 50 weight % saturated beta-carotene. 6. The process of claim 3, further comprising analyzing the first solvent for the extractible organics component. 7. The process of claim 1, wherein the isolated heavy hydrocarbon fraction comprising saturated beta-carotene has a kinematic viscosity of 200 to 280 cSt at 40° C., a cloud point of less than −9° C., and a pour point of less than −9° C. 8. A process for isolating heavy saturated hydrocarbons from a subsurface shale formation comprising kerogen and an extractible organics component, the process comprising: a) providing a first hydrocarbon solvent to the subsurface shale formation comprising kerogen and an extractible organics component;b) at least partially solubilizing at least a portion of the extractible organics component in the first hydrocarbon solvent;c) removing the first solvent containing the extractible organics component from the subsurface shale formation to a surface facility;d) providing a second solvent to the subsurface shale formation comprising kerogen and an extractible organics component;e) at least partially solubilizing at least a portion of the first hydrocarbon solvent in the second solvent;f) removing the second solvent containing the first hydrocarbon solvent from the subsurface shale formation; andg) isolating a heavy hydrocarbon fraction from the first solvent by distillation, wherein the heavy hydrocarbon fraction is a 900° F.+ fraction and comprises saturated beta-carotene. 9. The process of claim 8, wherein the heavy hydrocarbon fraction is a 900-1005° F. fraction. 10. The process of claim 8, wherein the first solvent is selected from the group consisting of 2-methyltetrahydrofuran, tetrahydrofuran, dichloromethane, chloroform, acetone, carbon disulfide, benzene, toluene, xylene, pyridine, n-methyl-2-pyrrolidone (NMP), cyclopentyl methyl ether (CPME), ethyl lactate, dibasic esters (DBE), propylene carbonate, dimethyl carbonate, CO2, CO2 at supercritical conditions, and mixtures thereof. 11. The process of claim 8, wherein the second solvent is selected from the group consisting of methanol, ethanol, acetone, CO2, CO2 at supercritical conditions, and mixtures thereof. 12. The process of claim 8, wherein the first solvent is 2-methyltetrahydrofuran and the second solvent is ethanol or CO2 at supercritical conditions. 13. The process of claim 8, further comprising removing the first and second solvents from the subsurface shale formation by pumping. 14. The process of claim 8, further comprising analyzing the first solvent for the extractible organics component. 15. The process of claim 14, further comprising deciding whether to provide additional first solvent or provide second solvent based upon the analysis for the extractible organics component. 16. The process of claim 6, further comprising recycling the first and/or second solvent to the subsurface shale formation. 17. The process of claim 8, wherein the first solvent is removed by providing the second solvent. 18. The process of claim 8, wherein the heavy hydrocarbon fraction comprises over 70 weight % saturated beta carotene and has a kinematic viscosity of 200 to 280 cSt at 40° C., a cloud point of less than −9° C., and a pour point of less than −9° C. 19. A process for making a bright stock comprising: a) providing a first hydrocarbon solvent to a subsurface shale formation comprising kerogen and an extractible organics component;b) at least partially solubilizing at least a portion of the extractible organics component in the first hydrocarbon solvent;c) removing the first solvent containing the extractible organics component from the subsurface shale formation to a surface facility;d) isolating a heavy hydrocarbon fraction by distillation, wherein the heavy hydrocarbon fraction is a 900° F.+ fraction and comprises saturated beta-carotene; ande) providing the heavy fraction comprising saturated beta-carotene as a bright stock. 20. The process according to claim 19, further comprising providing a second solvent to the subsurface shale formation to remove at least a portion of the first hydrocarbon solvent from the subsurface shale formation; and removing the second solvent from the subsurface shale formation. 21. The process of claim 19, wherein the bright stock has a VI of 60 to 100, a kinematic viscosity of 180 to 300 cSt at 40° C., a cloud point of less than −9° C., and a pour point of less than −9° C. 22. A process for making a blended bright stock comprising: (a) providing a first hydrocarbon solvent to the subsurface shale formation comprising kerogen and an extractible organics component;(b) at least partially solubilizing at least a portion of the extractible organics component in the first hydrocarbon solvent;(c) removing the first solvent containing the extractible organics component from the subsurface shale formation;(d) isolating a heavy hydrocarbon fraction from the first solvent by distillation, wherein the heavy hydrocarbon fraction is a 900° F.+ fraction and comprises saturated beta-carotene;(e) providing the heavy hydrocarbon fraction comprising saturated beta-carotene as a bright stock blending feedstock;(f) blending the bright stock blending feedstock with a petroleum derived bright stock or a Fischer-Tropsch derived bright stock; and(g) isolating a blended bright stock. 23. The process according to claim 22, further comprising providing a second solvent to the subsurface shale formation to remove at least a portion of the first hydrocarbon solvent from the subsurface shale formation; and removing the second solvent from the subsurface shale formation. 24. The process of claim 22, wherein isolating the heavy hydrocarbon fraction is performed by distillation and the heavy hydrocarbon fraction is a 900-1005° F. fraction. 25. The process of claim 22, wherein the blended bright stock has a VI of 60 to 100, a kinematic viscosity of 180 to 300 cSt at 40° C., a cloud point of less than −9° C., and a pour point of less than −9° C. 26. The process of claim 22, further comprising blending 99 to 10 wt % of the bright stock feedstock with 90 to 1 wt % petroleum derived bright stock or Fischer-Tropsch derived bright stock. 27. The process of claim 26, further comprising blending 75 to 25 wt % of the bright stock feedstock with 75 to 25 wt % petroleum derived bright stock or Fischer-Tropsch derived bright stock.
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이 특허에 인용된 특허 (208)
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