CA1072442A - Method and apparatus in situ recovery of bituminous hydrocarbons from tarsands - Google Patents
Method and apparatus in situ recovery of bituminous hydrocarbons from tarsandsInfo
- Publication number
- CA1072442A CA1072442A CA264,800A CA264800A CA1072442A CA 1072442 A CA1072442 A CA 1072442A CA 264800 A CA264800 A CA 264800A CA 1072442 A CA1072442 A CA 1072442A
- Authority
- CA
- Canada
- Prior art keywords
- tubes
- shaft
- fluidizing medium
- invention according
- formation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
A central shaft is sunk into the tarsand formation and a plurality of radially extending and spirally located injection and collection tubes extend from the shaft into the tarsand formation and these tubes communicate through the wall of the shaft. Hot water, steam or solvent or a combination thereof is injected into the tarsand through the injection tubes thus fluidizing the surrounding tarsand or the hydro-carbon content thereof so that this, solvent with some of the hot water and/or solvent flows into the collection tubes and then into the base of the shaft which acts as a sump. It is then pumped to the sur-face and conveyed to settling tanks.
A central shaft is sunk into the tarsand formation and a plurality of radially extending and spirally located injection and collection tubes extend from the shaft into the tarsand formation and these tubes communicate through the wall of the shaft. Hot water, steam or solvent or a combination thereof is injected into the tarsand through the injection tubes thus fluidizing the surrounding tarsand or the hydro-carbon content thereof so that this, solvent with some of the hot water and/or solvent flows into the collection tubes and then into the base of the shaft which acts as a sump. It is then pumped to the sur-face and conveyed to settling tanks.
Description
~L~7~
BACKGROUND OF THE INVENTION
.__ This invention relates -to a method and apparatus for -the recovery of bituminous hydrocarbons from tarsands such as the tarsands in existence in areas of Northern Alberta.
In general, it consists of a vertical shaft which is sunk to provide access to reach the layers of tarsand deposits.
A series of horizontally extending perforated drill casings fan out radially from the central vertical shaft, in all direc-tions. These radial pipes are preferably arranged in a spiral formation.
Steam and/or hot water, and/or solvent is transmitted through horizontal injection tubes and a flow established through the surrounding tarsand to the nearest recovery tubes.
A pattern of vertical shafts and horizontal perforated tubes described herein is the medium in the recovery of the bitumen from the tarsand deposits.
SUMMARY OF THE INVENTION
. ~
In accordance with the invention there is provided a method of recovery of bituminous hydrocarbons from a tarsand formation consisting of the steps of sinking a ver-tical shaft into the formation, extending a plurality of perforated injec-~(37;~
tion tubes from the shaft into the formation, extending a plurality of collector tubes from the shaft into the formation and injecting a fluidizing medium into the formation through the perforated injector tubes and collecting fluidized material S from the formation through the collector tubes and then convey-ing said fluidized material to the surface.
A further aspect of the invention consists of struc-ture for the recovery o~ bituminous hydrocarbons from a tar-sand deposit comprising in combination a central shaft extend-ing from the surface downwardly into the deposit, a pluralityof injection tubes extending from said shaft into said deposit and communicating through the wall of said shaft, said tubes being perforated along the length thereof, a plurality of per-forated collection tubes also extending from said shaft into said deposit and also communicating through the wall of said shaft, said collection tubes being adjacent said injection tubes, a fluidizing medium, means operatively connecting said fluidizing medium with said injection tubes for injecting same into said deposit, sump means in the base of said shaft com-municating with said collection tubes and pump means in saidsump means to convey fluidized bituminous hydrocarbon material from said sump means to surfaceO
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention ~ - 2 ~
~ ,.......
~C~7~Z
consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, refer-ence being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWING~
. .
Figure 1 is a schematic cross section of a tarsand deposit showing the vertical shaft and the tubes extending outwardly therefrom.
Figure 2 is a schematic plan view of the shaft and horizontal tube layout.
Figure 3 shows a schematic view of the ver-,, ~ - 2A -,.~
07~ Z
tical shaft with the profile line of the tubes illus-trated.
Figure 3A is a fragmentary cross sectional view of part of the shaft showing the profile of the piping system thereonO
Figure 3B is a schematic plan view of the shaft and pipes extending therefrom.
Figure 4 is a schematic view showing the piping arrangement in the shaftO
Figure 5 shows a fragmentary cross sectional view of one of the injection tubes with schematic views of collection tubes on either side thereof.
Figure 6 is a schematic drawing for a hot water recovery system.
Figure 7 ~s a schematic dxawing of a steam injection recovery systemO
7'~
In the drawings like characters of r~ference indicate corresponding parts in the different figures~
DEl'AILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference should first be made to Figure 1 which shows a vertical shaft 10 preferably made of concrete, sunk downwardly through the top soil 11, the overburden 12, and into the tarsand formation 13 ter-minating, in this embodiment, at bed rock 14 as clearly shown. A concrete floor 15 is formed on the base of the shaft which thus acts as a collecting sump, ~ series of hori~ontal perforated d~ill casings or tubes collectively designated 16, extend outwardly from the sha~t and communicate with the interior of the shaft as will hereinafter be described.
Reference to Figure 2 shows a typical sha~t in situ layout and it will be ~ted that the tubes or casings 16 comprise what are referred to as outlet casings 17 and return casings or tubes 18 shown in dotted lines. Figure 2 also shows typical dimensions although these of course can be varied as desired, Reference to Figures 3, 3A and 3B will show 7Zfl~4~
that thcse horizontal tubes preferably are situated in a spiral formation around the vertical shaft 10~
As an example, Figure 3 shows the profile of a spiral formation of tubes indicated by refer~nce character 19.
Figure 3A shows the interior of the shaft 10 with the apertures 19A situated on the profile 19 to which the tubes 16 are connected and Figure 3B shows a schematic plan view with a note indicating suggested lengths of the casings or tubes 16.
Figure 4 shows a schematic view of the verti-cal shaft 10 together with some of the tubes 16 and the internal piping arrangement situated within the vertical shaft 10.
The injection or outlet tubes 17 extend in-wardly through the vertical shaft 10 and are connected by conduits 17A, to a ring header 20 which is provided with a further condu.it 21 connected to hot water, steam or solvent as will hereinafter be described~
The collection tubes 18 extend inwardly through the casing or vertical shaft 10 and are connected to substantially vertically situated discharge tubes 18A
which extend downwardly into the sump area 21 situated ., , `~
-7~
between the base 15 of the shaEt lO and a cross member 22 spaced thereabove.
A multi stage transfer pump 23 picks up the bitumen which has been transferred to the sump and 5 pumps it to the surface via a product line 24. It will, of course, be understood that bitumen will be mixed with sand and hot water and/or solvent.
Figure 5 shows one embodiment of the injec-tion tube or casing 17. It consists of an outer per-forated tube 25 with a concentrically located innertube 26 also perforated as illustrated by reference character 27, The hot water and/or steam and~or sol-vent are fed through this inner concentric tube 26 and flow outwardly through the perforations 27 and 15 outwardly through the perforations 27A in the outer tube 25.
This hot water and/or steam and/or solvent permeates the tarsand formation and fluidizes same which is then picked up by the collection tubes 18 situated adjacent the injection tubes 17. It should be understood that the product flows by gravity and injection pressure to the sump 210 : . , .
.
6337;~ 2 In this regard it should be noted that the horizontal tubes 17 and 18 may be placed in a radial or spiral formation around the vertical shaft 10 and that the spacing may range from 3 feet to 100 feet on the perimeter of the vertical shaft dependin~ upon conditions and design parameters~
The vertical spacing of the tubes extending from the perimeter of the shaft also may vary from between 3 feet and 100 feet and the size of the hori-zontal tubes may range from 2 inches O.D. to 30 inchesO~D., once again depending upon design parameters.
It is desirable that at least the collection tubes or casings 18 should extend outwardly and upwardly from the vertical tube 10 and that the degree of angle of the eXtendQd horizontal tubes may vary from 0 to 30 thus facilitating the flow of product through these tubes to the sump 21~
Figures 6 and 7 show schematics for hot water recovery and steam injection recovery and inasmuch as the apparatus abo~e ground is generally conventional~
it is not believed necessary to detail same further.
, . .
~ ~ 7 ~
However, it should be noted that a source of solvent (not illustrated~ may be provided so that either sol-vent on its own, a mixture of solvent and steam or a mixture of solvent and hot water may be injected de-pending upon circumstances. The solvent can be anypetroleum based solvent which will fluidize the bitu-minous hydrocarbons within the tarsand and of course much of this is recovered together with the ~luidize tarsand and may be separated and re-used. By the same token, it will be noted that the steam will con-dense in to water and that this water is also recover-ed and may, if desired, be re-used.
Since various modifications can be made in my invention as hereinabove described, and many appa rently widely different embodiments of same made with-in the spirit and scope of the claims without depart~
ing ~rom such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
BACKGROUND OF THE INVENTION
.__ This invention relates -to a method and apparatus for -the recovery of bituminous hydrocarbons from tarsands such as the tarsands in existence in areas of Northern Alberta.
In general, it consists of a vertical shaft which is sunk to provide access to reach the layers of tarsand deposits.
A series of horizontally extending perforated drill casings fan out radially from the central vertical shaft, in all direc-tions. These radial pipes are preferably arranged in a spiral formation.
Steam and/or hot water, and/or solvent is transmitted through horizontal injection tubes and a flow established through the surrounding tarsand to the nearest recovery tubes.
A pattern of vertical shafts and horizontal perforated tubes described herein is the medium in the recovery of the bitumen from the tarsand deposits.
SUMMARY OF THE INVENTION
. ~
In accordance with the invention there is provided a method of recovery of bituminous hydrocarbons from a tarsand formation consisting of the steps of sinking a ver-tical shaft into the formation, extending a plurality of perforated injec-~(37;~
tion tubes from the shaft into the formation, extending a plurality of collector tubes from the shaft into the formation and injecting a fluidizing medium into the formation through the perforated injector tubes and collecting fluidized material S from the formation through the collector tubes and then convey-ing said fluidized material to the surface.
A further aspect of the invention consists of struc-ture for the recovery o~ bituminous hydrocarbons from a tar-sand deposit comprising in combination a central shaft extend-ing from the surface downwardly into the deposit, a pluralityof injection tubes extending from said shaft into said deposit and communicating through the wall of said shaft, said tubes being perforated along the length thereof, a plurality of per-forated collection tubes also extending from said shaft into said deposit and also communicating through the wall of said shaft, said collection tubes being adjacent said injection tubes, a fluidizing medium, means operatively connecting said fluidizing medium with said injection tubes for injecting same into said deposit, sump means in the base of said shaft com-municating with said collection tubes and pump means in saidsump means to convey fluidized bituminous hydrocarbon material from said sump means to surfaceO
With the foregoing in view, and other advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention ~ - 2 ~
~ ,.......
~C~7~Z
consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, refer-ence being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWING~
. .
Figure 1 is a schematic cross section of a tarsand deposit showing the vertical shaft and the tubes extending outwardly therefrom.
Figure 2 is a schematic plan view of the shaft and horizontal tube layout.
Figure 3 shows a schematic view of the ver-,, ~ - 2A -,.~
07~ Z
tical shaft with the profile line of the tubes illus-trated.
Figure 3A is a fragmentary cross sectional view of part of the shaft showing the profile of the piping system thereonO
Figure 3B is a schematic plan view of the shaft and pipes extending therefrom.
Figure 4 is a schematic view showing the piping arrangement in the shaftO
Figure 5 shows a fragmentary cross sectional view of one of the injection tubes with schematic views of collection tubes on either side thereof.
Figure 6 is a schematic drawing for a hot water recovery system.
Figure 7 ~s a schematic dxawing of a steam injection recovery systemO
7'~
In the drawings like characters of r~ference indicate corresponding parts in the different figures~
DEl'AILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference should first be made to Figure 1 which shows a vertical shaft 10 preferably made of concrete, sunk downwardly through the top soil 11, the overburden 12, and into the tarsand formation 13 ter-minating, in this embodiment, at bed rock 14 as clearly shown. A concrete floor 15 is formed on the base of the shaft which thus acts as a collecting sump, ~ series of hori~ontal perforated d~ill casings or tubes collectively designated 16, extend outwardly from the sha~t and communicate with the interior of the shaft as will hereinafter be described.
Reference to Figure 2 shows a typical sha~t in situ layout and it will be ~ted that the tubes or casings 16 comprise what are referred to as outlet casings 17 and return casings or tubes 18 shown in dotted lines. Figure 2 also shows typical dimensions although these of course can be varied as desired, Reference to Figures 3, 3A and 3B will show 7Zfl~4~
that thcse horizontal tubes preferably are situated in a spiral formation around the vertical shaft 10~
As an example, Figure 3 shows the profile of a spiral formation of tubes indicated by refer~nce character 19.
Figure 3A shows the interior of the shaft 10 with the apertures 19A situated on the profile 19 to which the tubes 16 are connected and Figure 3B shows a schematic plan view with a note indicating suggested lengths of the casings or tubes 16.
Figure 4 shows a schematic view of the verti-cal shaft 10 together with some of the tubes 16 and the internal piping arrangement situated within the vertical shaft 10.
The injection or outlet tubes 17 extend in-wardly through the vertical shaft 10 and are connected by conduits 17A, to a ring header 20 which is provided with a further condu.it 21 connected to hot water, steam or solvent as will hereinafter be described~
The collection tubes 18 extend inwardly through the casing or vertical shaft 10 and are connected to substantially vertically situated discharge tubes 18A
which extend downwardly into the sump area 21 situated ., , `~
-7~
between the base 15 of the shaEt lO and a cross member 22 spaced thereabove.
A multi stage transfer pump 23 picks up the bitumen which has been transferred to the sump and 5 pumps it to the surface via a product line 24. It will, of course, be understood that bitumen will be mixed with sand and hot water and/or solvent.
Figure 5 shows one embodiment of the injec-tion tube or casing 17. It consists of an outer per-forated tube 25 with a concentrically located innertube 26 also perforated as illustrated by reference character 27, The hot water and/or steam and~or sol-vent are fed through this inner concentric tube 26 and flow outwardly through the perforations 27 and 15 outwardly through the perforations 27A in the outer tube 25.
This hot water and/or steam and/or solvent permeates the tarsand formation and fluidizes same which is then picked up by the collection tubes 18 situated adjacent the injection tubes 17. It should be understood that the product flows by gravity and injection pressure to the sump 210 : . , .
.
6337;~ 2 In this regard it should be noted that the horizontal tubes 17 and 18 may be placed in a radial or spiral formation around the vertical shaft 10 and that the spacing may range from 3 feet to 100 feet on the perimeter of the vertical shaft dependin~ upon conditions and design parameters~
The vertical spacing of the tubes extending from the perimeter of the shaft also may vary from between 3 feet and 100 feet and the size of the hori-zontal tubes may range from 2 inches O.D. to 30 inchesO~D., once again depending upon design parameters.
It is desirable that at least the collection tubes or casings 18 should extend outwardly and upwardly from the vertical tube 10 and that the degree of angle of the eXtendQd horizontal tubes may vary from 0 to 30 thus facilitating the flow of product through these tubes to the sump 21~
Figures 6 and 7 show schematics for hot water recovery and steam injection recovery and inasmuch as the apparatus abo~e ground is generally conventional~
it is not believed necessary to detail same further.
, . .
~ ~ 7 ~
However, it should be noted that a source of solvent (not illustrated~ may be provided so that either sol-vent on its own, a mixture of solvent and steam or a mixture of solvent and hot water may be injected de-pending upon circumstances. The solvent can be anypetroleum based solvent which will fluidize the bitu-minous hydrocarbons within the tarsand and of course much of this is recovered together with the ~luidize tarsand and may be separated and re-used. By the same token, it will be noted that the steam will con-dense in to water and that this water is also recover-ed and may, if desired, be re-used.
Since various modifications can be made in my invention as hereinabove described, and many appa rently widely different embodiments of same made with-in the spirit and scope of the claims without depart~
ing ~rom such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) A method of recovery of bituminous hydrocar-bons from a tarsand formation consisting of the steps of sinking a vertical shaft into the formation, extending a plurality of perforated injection tubes from the shaft into the formation, extending a plurality of collector tubes from the shaft into the formation and injecting a fluidizing medium into the formation through the perforated injector tubes and collecting fluidized material from the formation through the collector tubes and then conveying said fluidized material to the surface.
(2) The method according to Claim 1 in which the fluidizing medium is steam.
(3) The method according to Claim 1 in which the fluidizing medium is hot water.
(4) The method according to Claim 1 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(5) The method according to Claim 2 in which the fluidizing medium is hot water.
(6) The method according to Claim 2 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(7) The method according to Claim 3 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(8) The method according to Claim 5 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(9) Structure for the recovery of bituminous hydro-carbons from a tarsand deposit comprising in combination a central shaft extending from the surface downwardly into the deposit, a plurality of injection tubes extending from said shaft into said deposit and communicating through the wall of said shaft, said tubes being perforated along the length there-of, a plurality of perforated collection tubes also extending from said shaft into said deposit and also communicating through the wall of said shaft, said collection tubes being adjacent said injection tubes, a fluidizing medium, means operatively connecting said fluidizing medium with said injection tubes for injecting same into said deposit, sump means in the base of said shaft communicating with said col-lection tubes and pump means in said sump means to convey fluidized bituminous hydrocarbon material from said sump means to surface.
(10) The invention according to Claim 9 in which said tubes are arranged spirally around said shaft.
(11) The invention according to Claim 9 in which said collection tubes incline upwardly and outwardly from said shaft.
(12) The invention according to Claim 10 in which said collection tubes incline upwardly and outwardly from said shaft.
(13) The invention according to Claim 9 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(14) The invention according to Claim 10 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(15) The invention according to Claim 11 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(16) The invention according to Claim 12 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(17) The invention according to Claims 9, 10 or 11 in which said fluidizing medium is se-lected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
(18) The invention according to Claims 12, 13 or 14 in which said fluidizing medium is se-lected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
(19) The invention according to Claims 15 or 16 in which said fluidizing medium is selected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
(1) A method of recovery of bituminous hydrocar-bons from a tarsand formation consisting of the steps of sinking a vertical shaft into the formation, extending a plurality of perforated injection tubes from the shaft into the formation, extending a plurality of collector tubes from the shaft into the formation and injecting a fluidizing medium into the formation through the perforated injector tubes and collecting fluidized material from the formation through the collector tubes and then conveying said fluidized material to the surface.
(2) The method according to Claim 1 in which the fluidizing medium is steam.
(3) The method according to Claim 1 in which the fluidizing medium is hot water.
(4) The method according to Claim 1 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(5) The method according to Claim 2 in which the fluidizing medium is hot water.
(6) The method according to Claim 2 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(7) The method according to Claim 3 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(8) The method according to Claim 5 in which the fluidizing medium is a bituminous hydrocarbon solvent.
(9) Structure for the recovery of bituminous hydro-carbons from a tarsand deposit comprising in combination a central shaft extending from the surface downwardly into the deposit, a plurality of injection tubes extending from said shaft into said deposit and communicating through the wall of said shaft, said tubes being perforated along the length there-of, a plurality of perforated collection tubes also extending from said shaft into said deposit and also communicating through the wall of said shaft, said collection tubes being adjacent said injection tubes, a fluidizing medium, means operatively connecting said fluidizing medium with said injection tubes for injecting same into said deposit, sump means in the base of said shaft communicating with said col-lection tubes and pump means in said sump means to convey fluidized bituminous hydrocarbon material from said sump means to surface.
(10) The invention according to Claim 9 in which said tubes are arranged spirally around said shaft.
(11) The invention according to Claim 9 in which said collection tubes incline upwardly and outwardly from said shaft.
(12) The invention according to Claim 10 in which said collection tubes incline upwardly and outwardly from said shaft.
(13) The invention according to Claim 9 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(14) The invention according to Claim 10 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(15) The invention according to Claim 11 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(16) The invention according to Claim 12 in which each of said injection tubes includes an outer perforated tube and an inner tube concentric-ally located within said outer tube, at least the outer end portion of said inner tube being perfora-ted.
(17) The invention according to Claims 9, 10 or 11 in which said fluidizing medium is se-lected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
(18) The invention according to Claims 12, 13 or 14 in which said fluidizing medium is se-lected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
(19) The invention according to Claims 15 or 16 in which said fluidizing medium is selected from a group of fluidizing media including hot water, steam and bituminous hydrocarbon solvent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4653475 | 1975-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072442A true CA1072442A (en) | 1980-02-26 |
Family
ID=10441630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA264,800A Expired CA1072442A (en) | 1975-11-11 | 1976-11-03 | Method and apparatus in situ recovery of bituminous hydrocarbons from tarsands |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1072442A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127457A (en) * | 1990-02-20 | 1992-07-07 | Shell Oil Company | Method and well system for producing hydrocarbons |
| US5215146A (en) * | 1991-08-29 | 1993-06-01 | Mobil Oil Corporation | Method for reducing startup time during a steam assisted gravity drainage process in parallel horizontal wells |
| US5217076A (en) * | 1990-12-04 | 1993-06-08 | Masek John A | Method and apparatus for improved recovery of oil from porous, subsurface deposits (targevcir oricess) |
| US10487636B2 (en) | 2017-07-27 | 2019-11-26 | Exxonmobil Upstream Research Company | Enhanced methods for recovering viscous hydrocarbons from a subterranean formation as a follow-up to thermal recovery processes |
| US11002123B2 (en) | 2017-08-31 | 2021-05-11 | Exxonmobil Upstream Research Company | Thermal recovery methods for recovering viscous hydrocarbons from a subterranean formation |
| US11142681B2 (en) | 2017-06-29 | 2021-10-12 | Exxonmobil Upstream Research Company | Chasing solvent for enhanced recovery processes |
| US11261725B2 (en) | 2017-10-24 | 2022-03-01 | Exxonmobil Upstream Research Company | Systems and methods for estimating and controlling liquid level using periodic shut-ins |
-
1976
- 1976-11-03 CA CA264,800A patent/CA1072442A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127457A (en) * | 1990-02-20 | 1992-07-07 | Shell Oil Company | Method and well system for producing hydrocarbons |
| US5217076A (en) * | 1990-12-04 | 1993-06-08 | Masek John A | Method and apparatus for improved recovery of oil from porous, subsurface deposits (targevcir oricess) |
| US5215146A (en) * | 1991-08-29 | 1993-06-01 | Mobil Oil Corporation | Method for reducing startup time during a steam assisted gravity drainage process in parallel horizontal wells |
| US11142681B2 (en) | 2017-06-29 | 2021-10-12 | Exxonmobil Upstream Research Company | Chasing solvent for enhanced recovery processes |
| US10487636B2 (en) | 2017-07-27 | 2019-11-26 | Exxonmobil Upstream Research Company | Enhanced methods for recovering viscous hydrocarbons from a subterranean formation as a follow-up to thermal recovery processes |
| US11002123B2 (en) | 2017-08-31 | 2021-05-11 | Exxonmobil Upstream Research Company | Thermal recovery methods for recovering viscous hydrocarbons from a subterranean formation |
| US11261725B2 (en) | 2017-10-24 | 2022-03-01 | Exxonmobil Upstream Research Company | Systems and methods for estimating and controlling liquid level using periodic shut-ins |
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