WO2024054129A1 - Procédé d'extraction de pétrole - Google Patents
Procédé d'extraction de pétrole Download PDFInfo
- Publication number
- WO2024054129A1 WO2024054129A1 PCT/RU2023/000257 RU2023000257W WO2024054129A1 WO 2024054129 A1 WO2024054129 A1 WO 2024054129A1 RU 2023000257 W RU2023000257 W RU 2023000257W WO 2024054129 A1 WO2024054129 A1 WO 2024054129A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- solvent
- viscosity
- formation
- production
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 44
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 34
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 33
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000009835 boiling Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000010426 asphalt Substances 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000009792 diffusion process Methods 0.000 abstract description 7
- 239000000839 emulsion Substances 0.000 abstract description 6
- 231100000331 toxic Toxicity 0.000 abstract description 6
- 230000002588 toxic effect Effects 0.000 abstract description 6
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 30
- 238000004227 thermal cracking Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Definitions
- the invention relates to methods for oil production by thermal methods and can be used for the production of high-viscosity oils, in which the viscosity of the oil is reduced.
- the “gravitational steam-power method of oil production” is known using a pressure and intake pipeline, in which a low-boiling liquid under pressure is introduced into the oil-bearing layer through a pressure pipeline, which evaporates in the oil-bearing layer, and its mixture with oil is removed to the surface through the intake pipeline. The mixture is separated, the oil is collected, and the vapor of the low-boiling liquid is condensed for reuse in the well (RF patent No. 2245999, 1998).
- the most common way to intensify the production of high-viscosity oils and natural bitumens are thermal extraction methods, for example, thermal steam (patent RU No. 2098613, IPC E21B 43/24, 1997).
- the method includes drilling and preparing a deposit for production with at least two pairs of wells having horizontal sections, where each pair includes an injection well ending in the deposit, and a production well ending in the deposit below the level of the injection well, and the horizontal sections of the production and injection well as within the pair, and separately for each pair, are parallel to each other.
- a permeable zone is created between the injection well and the production well of each pair of wells, water steam is injected through the injection wells, and hydrocarbons are simultaneously extracted through the production wells.
- the disadvantage of this method is that the injection of steam and hydrocarbon solvent into the formation is carried out without taking into account their effect on the change in the viscosity of the product in layer As a result, there is an irrational consumption of steam and expensive hydrocarbon solvent, with the formation of water-saturated toxic emulsions.
- a thermal method of oil production is known, using low-viscosity oil as a solvent (US Pat. 4461350, class E 21 B 43/24, 166/272).
- the essence of the method is that hot oil of reduced viscosity is fed into the formation through injection wells, where it dissolves viscous formation oil, heats the formation, which leads to a decrease in the viscosity of the formation oil.
- the closest in technical essence and achieved result is the method of producing high-viscosity oil (RF Patent 1487555, 1987) by pumping into the formation a coolant-solvent with a viscosity lower than the viscosity of reservoir oil, characterized in that, in order to prevent the precipitation of asphalt-resinous substances in reservoir, losses of associated oil metals and increased oil production, oil fractions with a boiling point greater than 210°C are injected into the reservoir as a coolant-solvent at an injection temperature of 150 - 300°C.
- a hot coolant-solvent injected into the formation causes heating of the oil formation, which leads to a decrease in the viscosity of the oil.
- the molecular weight and the boiling point of oil fractions there is a certain relationship between the molecular weight and the boiling point of oil fractions; the larger the molecular weight of the oil fraction, the higher its boiling point.
- the used coolant-solvent with a boiling point greater than 210°C contains molecules with a high molecular weight that reduce the diffusion of the solvent into the oil.
- the objective of the proposed invention is to increase the diffusion of the solvent into oil, while simultaneously eliminating the costs of water treatment and injection of water vapor, which forms water-saturated toxic emulsions.
- the problem is solved due to the fact that the proposed method of oil production makes it possible to avoid the injection of water vapor into the oil product formation, thereby eliminating the formation of watered toxic emulsions, since heated hydrocarbon fractions with a boiling point of less than 210°C are pumped into the oil product formation as a solvent, under pressure in the form of a gas-liquid mixture with temperatures up to 410°C.
- the proposed method of oil production includes the construction of an upper injection well and a lower production well with horizontal sections located one above the other, injection of a solvent consisting of heated hydrocarbon fractions into the oil product formation through a horizontal injection well with heating of the formation, creating a zone of influence of the heated hydrocarbon solvent and selection of products through a horizontal production well.
- heated hydrocarbon fractions with a boiling point of less than 210°C are pumped in as a solvent, under pressure in the form of a gas-liquid mixture with a temperature of up to 410°C.
- a solvent consisting of heated hydrocarbon fractions reduces the viscosity of oil, in addition, due to diffusion into oil, it contributes to its dilution to an even greater extent. degrees, forming oil with reduced viscosity. Due to gravity drainage, once the viscosity of the mixture of hydrocarbon solvent and reduced viscosity oil is low enough to flow through the formation to the production well, oil extraction from the formation begins.
- Figure 1 shows a diagram of the proposed method for developing a deposit of high-viscosity oil or bitumen containing an injection well 1, a thermal cracking unit 2, a production well 3, a seal formation 4, an oil product formation 5, a clay formation 6 and a zone of influence of a heated hydrocarbon solvent 7.
- V is the flow of hydrocarbon solvent for injection into the reservoir
- FIG. 1 An example of the implementation of the proposed method of oil production is presented in a diagram with the selection of a heated hydrocarbon solvent in an in-field thermal cracking unit (Fig. 1) and includes the following.
- a heated hydrocarbon solvent with a boiling point below 210°C in the form of a gas-liquid mixture with a temperature of up to 410°C is carried out through a horizontal injection well 1, the oil product formation is heated to create a zone 7 of thermal influence and diffusion of the hydrocarbon solvent into oil.
- the heated hydrocarbon solvent reduces the viscosity of oil, and, due to diffusion into the oil, contributes to its dilution to an even greater extent. Due to gravity drainage, after the viscosity of the mixture of hydrocarbon solvent and reduced-viscosity oil becomes low enough to allow it to flow through the formation to the production well 3, the extraction of stream II of the mixture of hydrocarbon solvent and reduced-viscosity oil from the formation begins.
- Stream II a mixture of hydrocarbon solvent and oil with reduced viscosity, is supplied to the field thermal cracking unit 2, from which stream III of upgraded oil comes out and stream IV of the hydrocarbon solvent is taken.
- Stream IV of hydrocarbon solvent is divided into output stream VI of excess hydrocarbon solvent and withdrawn stream V of hydrocarbon solvent for injection into the formation heated in the field thermal cracking unit 2.
- the proposed method of oil production allows increasing the diffusion of the solvent into the oil, while simultaneously eliminating the costs of water treatment and injection of water vapor, which forms water-saturated toxic emulsions.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
L'invention concerne des procédés d'extraction de pétrole selon des procédés thermiques, et peut être utilisée afin d'extraire des pétroles de haute viscosité où la viscosité du pétrole diminue. L'invention concerne un procédé d'exploitation de dépôts de pétrole de haute viscosité et de bitume, qui consiste à élaborer deux puits horizontaux disposés l'un au-dessus de l'autre, à pomper un solvant dans un puits de pompage et à prélever le produit depuis le puits d'exploitation; il est caractérisé en ce que le solvant consiste en des fractions hydrocarbures chauffées ayant une température d'ébullition de moins de 210°C sous pression, sous forme d'un mélange gaz-liquide à une température pouvant atteindre 410°C. Le résultat technique de ce procédé permet d'augmenter la diffusion du solvant dans le pétrole, tout en excluant les dépenses liées à la préparation hydraulique et au pompage de vapeur d'eau générant des émulsions mouillées toxiques.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2022123931 | 2022-09-07 | ||
| RU2022123931A RU2801929C1 (ru) | 2022-09-07 | Способ добычи нефти |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024054129A1 true WO2024054129A1 (fr) | 2024-03-14 |
Family
ID=90191636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2023/000257 WO2024054129A1 (fr) | 2022-09-07 | 2023-08-25 | Procédé d'extraction de pétrole |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2024054129A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444261A (en) * | 1982-09-30 | 1984-04-24 | Mobil Oil Corporation | High sweep efficiency steam drive oil recovery method |
| SU1487555A1 (ru) * | 1987-01-05 | 1995-05-27 | Всесоюзный нефтяной научно-исследовательский геологоразведочный институт | Способ добычи высоковязкой нефти |
| RU2387818C1 (ru) * | 2009-03-04 | 2010-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Способ разработки залежей тяжелых и сверхвысоковязких нефтей |
| CA2872120A1 (fr) * | 2014-11-24 | 2016-05-24 | Imperial Oil Resources Limited | Recuperation d'hydrocarbures dans un reservoir souterrain |
-
2023
- 2023-08-25 WO PCT/RU2023/000257 patent/WO2024054129A1/fr unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444261A (en) * | 1982-09-30 | 1984-04-24 | Mobil Oil Corporation | High sweep efficiency steam drive oil recovery method |
| SU1487555A1 (ru) * | 1987-01-05 | 1995-05-27 | Всесоюзный нефтяной научно-исследовательский геологоразведочный институт | Способ добычи высоковязкой нефти |
| RU2387818C1 (ru) * | 2009-03-04 | 2010-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Способ разработки залежей тяжелых и сверхвысоковязких нефтей |
| CA2872120A1 (fr) * | 2014-11-24 | 2016-05-24 | Imperial Oil Resources Limited | Recuperation d'hydrocarbures dans un reservoir souterrain |
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