CN111520118B - Recyclable heavy oil recovery method and system for heating injected solvent underground - Google Patents
Recyclable heavy oil recovery method and system for heating injected solvent underground Download PDFInfo
- Publication number
- CN111520118B CN111520118B CN202010539577.5A CN202010539577A CN111520118B CN 111520118 B CN111520118 B CN 111520118B CN 202010539577 A CN202010539577 A CN 202010539577A CN 111520118 B CN111520118 B CN 111520118B
- Authority
- CN
- China
- Prior art keywords
- solvent
- well
- injection
- oil
- production
- 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.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/34—Arrangements for separating materials produced by the well
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)
- Degasification And Air Bubble Elimination (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a recyclable thickened oil recovery method and system for heating injected solvent underground, wherein the method comprises the following steps: s1: single well production operation; s2: production and separation operation: injecting the produced fluid into a gas-liquid separator for oil-gas separation, separating the solvent extracted along with the crude oil from the thick oil, wherein the thick oil enters a selling link through transportation and pipeline ways, and the separated solvent is treated and recovered and is input into a solvent storage tank for cyclic utilization; s3: adjacent well cooperative operation: a plurality of wells are arranged to form a well group. The solvent is injected into the formation at normal temperature and the pressure rises with increasing temperature due to solvent saturation. Therefore, the liquid solvent is injected into the stratum under the high-temperature condition, and the energy consumption is large. And under the normal temperature condition, the solvent can be compressed into a liquid state under lower pressure, and the solvent is injected into the stratum to the maximum extent in a liquid state mode.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to a method and a system for exploiting thick oil by heating an injected solvent underground, wherein the method and the system can be recycled.
Background
In order to meet the increasing energy demand, the heavy oil resource is more and more valued. In the process of thick oil development, the biggest problem influencing the high-efficiency development of thick oil resources is that the thick oil has high viscosity, so that the thick oil is difficult to flow in an oil reservoir. In order to reduce the viscosity of the thick oil, the thick oil can flow in the stratum conveniently, and therefore efficient development of the thick oil is achieved. The currently used methods for reducing viscosity of thick oil mainly comprise: the purpose of reducing the viscosity of the thickened oil is achieved by injecting hot fluid (hot water, steam, superheated steam and the like) and injection solvent (methane, nitrogen, natural gas, carbon dioxide and the like) by utilizing heat and a dissolution mechanism, so that the effective utilization of the thickened oil reservoir is realized. In field applications, hot fluids are often injected into the reservoir along with solvents (solvent assisted thermal recovery of heavy oil) in order to minimize the viscosity of the heavy oil. In the present case, the method implemented in the field is to inject the heated solvent into the reservoir by using a surface heating device. However, it can be seen from theoretical calculations that such an injection method is not favorable for solvent injection and has limited energy carrying capacity. The density of the solvent decreases and the saturation pressure increases as the temperature increases. In such a case, the energy required to inject the same mass of solvent into the reservoir increases, resulting in increased investment and affecting economic efficiency. Meanwhile, the heated solvent causes heat loss in the surface pipeline and the oil pipe, and the injection efficiency of energy into the stratum is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for recovering thick oil, which can be recycled and can heat injected solvent underground. In order to solve the problems of low solvent injection efficiency and low energy utilization rate of the existing oil reservoir, the patent designs a mode of solvent-assisted thermal development by using a downhole heating and recycling mode.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention mainly adopts two technical schemes to solve the problems, which are as follows.
The invention provides a recyclable thick oil recovery method for heating injected solvent underground, which comprises the following steps:
s1: single well production operation;
s2: production and separation operation: injecting the produced fluid into a gas-liquid separator for oil-gas separation, separating the solvent extracted along with the crude oil from the thick oil, wherein the thick oil enters a selling link through transportation and pipeline ways, and the separated solvent is treated and recovered and is input into a solvent storage tank for cyclic utilization;
s3: adjacent well cooperative operation: arranging a plurality of wells to form a well group, wherein the well group is divided into an injection well group, a soaking well group and a production well group according to the working states of different wells;
separating the produced liquid of the production well group, pressurizing the separated and processed solvent and the solvent transported to the well site by a booster pump, and injecting the solvent into the injection well group;
when the original production well group finishes the production period, the original production well group is converted into an injection well group, and the solvent separated from the produced fluid of other wells can be injected into the injection well group, so that the purposes of cyclic utilization and cooperative operation are achieved.
As a preferred technical solution, the step S1 of the single-well production operation specifically includes the following steps:
s1.1: preparing for injection: compressing the solvent, storing the compressed solvent in a liquid state in a solvent storage tank near an injection well, and simultaneously monitoring the purity, pressure and temperature parameters of the solvent to ensure the safety of the solvent storage;
s1.2: solvent injection: when the solvent is injected, the production valve and the emptying valve are closed; opening an injection valve and a control valve, and injecting the processed normal-temperature solvent into the oil reservoir through a production well shaft in a liquid state by a booster pump;
s1.3: heating a solvent: after the solvent is injected into the oil reservoir, a bottom heater control switch is turned on, and the solvent is heated in the oil well, so that the injected solvent can diffuse into the oil reservoir through a perforation under the action of gravity;
s1.4: well stewing: after injecting the solvent with the designed amount into the oil reservoir, closing the injection valve and the control valve, carrying out soaking operation, and keeping the underground heater open.
S1.5: and (3) well opening production: after the soaking time set on site is over, keeping the injection valve and the emptying valve in a closed state; opening a production valve and a control valve, controlling a proper pressure drop speed, and implementing thickened oil recovery; and in the production process, the underground heater is kept on, so that the viscosity of the fluid in the shaft is reduced in an auxiliary manner.
Preferably, in step S3, the surface treatment and recovery device is used as an adjacent well group.
The other technical scheme is that the heavy oil recovery system capable of being recycled and heating injected solvent underground comprises a well group consisting of a plurality of single wells and a solvent storage tank, wherein an underground heater is arranged at the bottom of each single well, the solvent storage tank is connected with the single wells through pipelines and used for injecting the solvent into the single wells, a supercharging device is arranged on each pipeline, a discharge port of each single well is connected with a gas-liquid separator through a pipeline, oil and gas separation is carried out on produced fluid, the produced heavy oil enters a sales end through a conveying pipeline, and the separated solvent returns to the solvent storage tank through a pipeline.
The solvent constant-temperature heating control system comprises a temperature sensor, a central processing unit, a display, a solvent temperature sensor, a pressure sensor, a density monitor and a concentration monitor which are arranged at the bottom of a single well, wherein the solvent temperature sensor, the pressure sensor, the density monitor and the concentration monitor are arranged on a solvent storage tank and are in signal connection with the central processing unit, the detected electronic signal data are transmitted to the central processing unit, the central processing unit processes the electronic signal and then controls the power of a well heater through the display and according to the temperature signal transmitted by the temperature sensor, the constant-temperature heating control of a solvent is realized.
As a preferred technical scheme, the supercharging equipment is a booster pump.
As a preferred technical scheme, the number of the single wells is not less than 6.
As the preferred technical scheme, one end of the gas-liquid separator is connected with a solvent treatment device, the other end of the gas-liquid separator is connected with a sales end, the solvent treatment device is used for treating the recovered solvent, one end of the solvent treatment device is connected with a gas pipeline and used for conveying the generated gas out, and the other end of the solvent treatment device is connected with a solvent recovery temporary storage tank and used for temporarily storing the solvent.
As a preferred technical scheme, the temporary solvent recovery storage tank is connected with the solvent storage tank through a pipeline.
As a preferred technical scheme, the well group is divided into an injection well group, a soaking well group and a production well group according to the working states of different wells.
Has the advantages that:
for a horizontal well development mode implemented in the current thick oil development process, a downhole heater is installed at a horizontal well section to heat a solvent injected into an oil well. Injecting a liquid normal-temperature solvent into an oil well, and heating the solvent underground by using an underground heater to increase the temperature of the injected solvent. The advantages of this design are:
1. the solvent is injected into the formation at normal temperature and the pressure rises with increasing temperature due to solvent saturation. Therefore, the solvent can be compressed into a liquid state at a lower pressure drop under normal temperature conditions than under high temperature conditions, and the solvent can be injected into the formation to the maximum extent in a liquid state.
2. The downhole heating is implemented, so that heat loss in surface pipelines and wellbores can be completely avoided, and heat injected into the formation can be fully utilized.
3. The electric energy replaces combustion energy, and a mode that a boiler (stone raw materials such as coal, natural gas, petroleum and the like) generates heat to heat the solvent on the ground is changed into a mode that a downhole heater is started to heat the injected solvent in an electric mode. The generation of combustion gas is avoided, and the carbon footprint is reduced.
4. The solvent is heated in an oil reservoir by underground heating, and the heated solvent is gasified (the gaseous solvent has higher diffusion coefficient than the liquid solvent), is in direct contact with the crude oil, can be quickly dissolved into the crude oil, and plays a role in reducing the viscosity of the crude oil.
5. The solvent is recycled, and the injected solvent is injected into an adjacent well after being treated in the production process, so that the recycling of the solvent can be realized, and the investment is reduced.
6. And the adjacent wells operate in a cooperative manner, so that the solvent transportation can be avoided, and the solvent injection operation is implemented in a nearby well in the process of carrying out the soaking operation in one well, so that the working hour is reduced, and the development efficiency is improved.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a diagram illustrating a process for injecting liquid solvent into a reservoir in an embodiment of the present invention;
figure 2 is a diagram of the process of soaking and solvent heating in an embodiment of the present invention;
FIG. 3 is a diagram of a well-opening production process in an embodiment of the present invention;
fig. 4 is a flow chart of the solvent injection operation of the adjacent well cooperative operation in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention will now be further described with reference to the accompanying drawings.
In the embodiment of the invention, the production process of the thickened oil can be summarized into the following steps:
1. single well production operations.
For a single well production process, four parts are divided: the solvent injection process, the solvent heating process, the soaking process, and the production process are shown in the flow charts of FIGS. 1-3.
1.1 implant preparation. The solvent (recovered solvent or solvent transported to the site) is compressed and stored in a liquid state in a solvent storage tank near the injection well, and parameters such as the purity, pressure and temperature of the solvent are monitored to ensure the safety of the solvent storage.
1.2 solvent injection procedure. When the solvent is injected, the production valve (valve 1) and the emptying valve (valve 4) are closed; the injection valve (valve 2) and the control valve (valve 3) are opened, and the treated normal temperature solvent is injected into the oil reservoir through the production well shaft in a liquid state by a booster pump.
1.3 solvent heating process. After the solvent is injected into the oil reservoir, a heater control switch at the bottom of the well is turned on, and the solvent is heated in the oil well, so that the injected solvent can diffuse into the oil reservoir through a perforation under the action of gravity.
1.4 soaking process. After injecting the designed amount of solvent into the oil reservoir, closing the injection valve (valve 2) and the control valve (valve 3), carrying out soaking operation, and keeping the underground heater open. The soaking function is to dissolve the injected solvent into the oil reservoir as much as possible, and reduce the viscosity of the crude oil to the maximum extent.
1.5 open-hole production process. After the soaking time set on site is over, keeping the injection valve (valve 2) and the emptying valve (valve 4) in a closed state; and opening a production valve (valve 1) and a control valve (valve 3), controlling a proper pressure drop speed, and performing thickened oil recovery. And in the production process, the underground heater is kept on, so that the viscosity of the fluid in the shaft is reduced in an auxiliary manner.
2. And (5) production and separation operation.
For single well operation, oil-gas separation operation is carried out on the produced heavy oil, and the production flow chart is shown in figure 3. And injecting the produced fluid into a gas-liquid separator for oil-gas separation. The solvent extracted along with the crude oil is separated from the thick oil, and the thick oil enters a selling link through transportation, pipelines and other ways. And (4) treating and recovering the separated solvent, and inputting the solvent into a solvent storage tank for recycling.
3. And performing adjacent well cooperative operation.
In order to reduce the facility input in earlier stage, this patent has designed adjacent well collaborative operation. Surface treatment, recovery, etc. devices are used as adjacent well groups. In a cluster (multiple well groups), different wells will be in different production phases due to their different production times, mainly comprising: an injection phase, a soak phase, and a production phase. The wells at the same stage are divided into the same well group as shown in fig. 4. The produced fluid from a production well group (e.g., well 1) is separated, and the separated, treated solvent is injected into an injection well group (e.g., well 2, well 3, etc.) along with solvent transported to the well site, pressurized via a booster pump. When the original production well group (such as the well 1) finishes the production period, the original production well group is converted into an injection well group, and the solvent separated from the production fluid of other wells can be injected into the well 1, so that the purposes of cyclic utilization and cooperative operation are achieved. The operation, transportation, time cost and the like in the production process are reduced.
The embodiment of the invention also provides a recyclable thickened oil recovery system for heating injected solvent underground, which can be seen in fig. 1-3 and comprises a well group consisting of a plurality of single wells and a solvent storage tank, wherein the bottom of each single well is provided with a well heater, the solvent storage tank is connected with the single well through a pipeline and is used for injecting the solvent into the single well, the pipeline is provided with a supercharging device, a discharge hole of the single well is connected with a gas-liquid separator through a pipeline, the produced fluid is subjected to oil-gas separation, the produced thickened oil enters a sales end through a conveying pipeline, and the separated solvent returns to the solvent storage tank through a pipeline.
The control system comprises a temperature sensor, a central processing unit, a display, a solvent temperature sensor, a pressure sensor, a density monitor and a concentration monitor which are arranged at the bottom of the single well, wherein the solvent temperature sensor, the pressure sensor, the density monitor and the concentration monitor are arranged on the solvent storage tank, the temperature sensor, the solvent temperature sensor, the pressure sensor, the density monitor and the concentration monitor are in signal connection with the central processing unit and are used for transmitting detected electronic signal data to the central processing unit, and the central processing unit displays the electronic signals through the display after processing the electronic signals and controls the power of a well heater according to the temperature signals transmitted by the temperature sensor to realize the constant-temperature heating control of the solvent.
In the embodiment of the invention, the supercharging equipment is a booster pump.
In the embodiment of the invention, the number of the single wells is not less than 6.
In the embodiment of the invention, one end of the gas-liquid separator is connected with a solvent treatment device, the other end of the gas-liquid separator is connected with a sales end, the solvent treatment device is used for treating the recovered solvent, one end of the solvent treatment device is connected with a gas pipeline and used for conveying the generated gas out, and the other end of the solvent treatment device is connected with a solvent recovery temporary storage tank and used for temporarily storing the solvent.
Further, the solvent recovery temporary storage tank is connected with the solvent storage tank through a pipeline.
Further, the well group is divided into an injection well group, a soaking well group and a production well group according to the working states of different wells.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being covered by the appended claims and their equivalents.
Claims (8)
1. A recyclable thickened oil recovery method for heating an injection solvent underground is characterized in that a recyclable thickened oil recovery system for heating the injection solvent underground is used, the system comprises a well group consisting of a plurality of single wells and a solvent storage tank, an underground heater is arranged at the bottom of each single well, the solvent storage tank is connected with the single wells through pipelines and used for injecting the solvent into the single wells, a pressurizing device is arranged on each pipeline, a discharge port of each single well is connected with a gas-liquid separator through a pipeline, oil and gas separation is carried out on produced fluid, the produced thickened oil enters a sales end through a conveying pipeline, and the separated solvent returns to the solvent storage tank through a pipeline; the method comprises the following steps:
s1: single well production operation;
s2: production and separation operation: injecting the produced fluid into a gas-liquid separator for oil-gas separation, separating the solvent extracted along with the crude oil from the thick oil, wherein the thick oil enters a selling link through transportation and pipeline ways, and the separated solvent is treated and recovered and is input into a solvent storage tank for cyclic utilization;
s3: adjacent well cooperative operation: arranging a plurality of wells to form a well group, wherein the well group is divided into an injection well group, a soaking well group and a production well group according to the working states of different wells;
separating the produced liquid of the production well group, pressurizing the separated and processed solvent and the solvent transported to the well site by a booster pump, and injecting the solvent into the injection well group;
when the original production well group finishes the production period, the original production well group is converted into an injection well group, and the solvent separated from the production fluid of other wells is injected into the injection well group, so that the purposes of cyclic utilization and cooperative operation are achieved; the step S1 of single-well production operation specifically comprises the following steps:
s1.1: injection preparation: compressing the solvent, storing the compressed solvent in a liquid state in a solvent storage tank near an injection well, and simultaneously monitoring the purity, pressure and temperature parameters of the solvent to ensure the safety of the solvent storage;
s1.2: solvent injection: when the solvent is injected, the production valve and the emptying valve are closed; opening an injection valve and a control valve, and injecting the treated normal-temperature solvent into the oil reservoir through a production well shaft in a liquid state by a booster pump;
s1.3: heating a solvent: after the solvent is injected into the oil reservoir, a heater control switch at the bottom of the well is started, and the solvent is heated in the oil well, so that the injected solvent can diffuse into the oil reservoir through a perforation under the action of gravity;
s1.4: well soaking: after injecting a designed amount of solvent into an oil reservoir, closing an injection valve and a control valve, carrying out soaking operation, and keeping an underground heater open;
s1.5: and (3) well opening production: after the soaking time set on site is over, keeping the injection valve and the emptying valve in a closed state; opening a production valve and a control valve, controlling a proper pressure drop speed, and implementing thickened oil recovery; and in the production process, the underground heater is kept on, so that the viscosity of the fluid in the shaft is reduced in an auxiliary manner.
2. The method for recovering thick oil by heating an injection solvent downhole as claimed in claim 1, wherein said step S3 uses a surface treatment and recovery device as a neighboring well group.
3. The method for recovering thick oil according to claim 1, wherein the injection solvent is heated under the well, it is characterized by also comprising a control system, wherein the control system comprises a temperature sensor arranged at the bottom of the single well, a central processing unit, a display, a solvent temperature sensor arranged on the solvent storage tank, a pressure sensor, a density monitor and a concentration monitor, the temperature sensor, the solvent temperature sensor, the pressure sensor, the density monitor and the concentration monitor are in signal connection with the central processing unit, the central processing unit is used for transmitting the detected electronic signal data to the central processing unit, and the central processing unit processes the electronic signal and then displays the processed electronic signal through the display and controls the power of the well heater according to the temperature signal transmitted by the temperature sensor so as to realize the constant temperature heating control of the solvent.
4. The method for recovering thick oil by heating injection solvent under well, which can be recycled according to claim 1, wherein the pressurizing device is a pressurizing pump.
5. The method for recovering thick oil by heating injection solvent under well, which can be recycled according to claim 1, wherein the number of the single well is not less than 6.
6. The method for recovering thick oil by heating injected solvent under well, which can be recycled according to claim 1, wherein one end of the gas-liquid separator is connected with a solvent treatment device, the other end is connected with a sales end, the solvent treatment device is used for treating recovered solvent, one end is connected with a gas pipeline for delivering generated gas, and the other end is connected with a solvent recovery temporary storage tank for temporarily storing solvent.
7. The method as claimed in claim 6, wherein the solvent recovery scratch pad tank is connected to the solvent storage tank through a pipeline.
8. The method for recovering thick oil by heating injection solvent under well according to claim 1, wherein the wells are divided into injection wells, soaking wells and production wells according to the working conditions of different wells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539577.5A CN111520118B (en) | 2020-06-12 | 2020-06-12 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539577.5A CN111520118B (en) | 2020-06-12 | 2020-06-12 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111520118A CN111520118A (en) | 2020-08-11 |
| CN111520118B true CN111520118B (en) | 2022-09-13 |
Family
ID=71911895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010539577.5A Active CN111520118B (en) | 2020-06-12 | 2020-06-12 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520118B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360408A (en) * | 2020-12-03 | 2021-02-12 | 西南石油大学 | Novel method for improving recovery ratio of thickened oil by injecting carbon dioxide hot fluid |
| CN112324409B (en) * | 2020-12-31 | 2021-07-06 | 西南石油大学 | Method for producing solvent in situ in oil layer to recover thick oil |
| CN114482955B (en) * | 2022-02-17 | 2023-04-25 | 西南石油大学 | Method for improving deep thickened oil extraction efficiency by utilizing downhole crude oil cracking modification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4362213A (en) * | 1978-12-29 | 1982-12-07 | Hydrocarbon Research, Inc. | Method of in situ oil extraction using hot solvent vapor injection |
| CN1601052A (en) * | 2003-09-27 | 2005-03-30 | 中国石油天然气股份有限公司 | Method of integral throughput in multiple wells for extracting thick oil |
| CN109209306A (en) * | 2018-09-12 | 2019-01-15 | 中国石油天然气股份有限公司 | Oil in Super-low Permeability compact oil reservoir horizontal well infuses CO2The asynchronous method for supplementing energy of handling up |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122226A (en) * | 2007-09-06 | 2008-02-13 | 太原理工大学 | Method of high temperature hydrocarbon gas convection heating oil shale for exploiting oil gas |
| DE102009056803A1 (en) * | 2009-12-03 | 2011-06-09 | Robert Bosch Gmbh | Communication between elements of a system |
| CN102359363A (en) * | 2011-09-07 | 2012-02-22 | 赵铭 | New cold-mining technology for visbreaking thick oil by circulating reinjection of viscosity breaking agent between small well groups |
| CN102678096B (en) * | 2012-05-08 | 2015-07-08 | 中国石油天然气股份有限公司 | Hot water assisted gravity drainage method for mining high pour-point oil deposit |
| CN103089230B (en) * | 2013-01-24 | 2015-10-14 | 中国石油天然气股份有限公司 | A kind of solvent assists fireflood gravity drainage to exploit the method for oil reservoir |
| CN104141479B (en) * | 2013-05-09 | 2016-08-17 | 中国石油化工股份有限公司 | The thermal process of a kind of carbonate rock heavy crude reservoir and application thereof |
| CN104213886B (en) * | 2014-08-19 | 2016-08-31 | 中国石油天然气股份有限公司 | A kind of heavy crude reservoir foamed artificial oil is handled up recovery method |
| CN104533364B (en) * | 2014-11-24 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of underground hydrogenation catalyst modification recovery method of viscous crude and super-heavy oil deposit |
| CN104533365B (en) * | 2014-12-22 | 2017-01-11 | 中国石油大学(北京) | Method for exploiting oil sand through paraffin media |
| CN204457686U (en) * | 2014-12-26 | 2015-07-08 | 中国石油天然气股份有限公司 | The casing programme of a kind of viscous crude and the exploitation of super-heavy oil deposit underground upgrading |
| CN104832141B (en) * | 2015-04-13 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of solvent subsidiary level interwell communication method |
| CN104989345B (en) * | 2015-06-12 | 2017-09-15 | 中国石油天然气股份有限公司 | A kind of recovery method of single horizontal well solvent auxiliary |
| RU2599653C1 (en) * | 2015-09-14 | 2016-10-10 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Well operation method |
| CN106168119B (en) * | 2016-08-15 | 2018-07-13 | 中国石油天然气股份有限公司 | Downhole electric heating horizontal production well tubular column structure |
| CN106285500B (en) * | 2016-08-15 | 2018-09-04 | 中国石油天然气股份有限公司 | Downhole electric heating vertical injection wells tubular column structure |
| CN106593378B (en) * | 2016-12-20 | 2019-05-07 | 中国石油天然气股份有限公司 | Downhole electric heating producing well tubular column structure and its oil production method |
| CN106988714B (en) * | 2017-04-10 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of super-viscous oil drop sticking method |
| CN107130953B (en) * | 2017-05-17 | 2020-04-14 | 成都百联油田技术服务有限公司 | Chemical enhanced gas production process |
| CN107514248A (en) * | 2017-10-23 | 2017-12-26 | 大庆东油睿佳石油科技有限公司 | A kind of method of gas hydrates parallel water horizontal well chemical flooding exploitation |
| CN108194065B (en) * | 2018-01-19 | 2020-02-07 | 中国石油大学(华东) | Method for improving shale oil huff and puff recovery ratio by using carbon dioxide/cosolvent system |
| CN110043235A (en) * | 2019-05-23 | 2019-07-23 | 西南石油大学 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
| CN210033395U (en) * | 2019-05-23 | 2020-02-07 | 西南石油大学 | Single horizontal well gravity oil drainage exploitation device using underground steam generation |
| CN111188607B (en) * | 2020-01-15 | 2021-01-19 | 青岛海洋地质研究所 | Method for mining natural gas hydrate by cooperation of magnetofluid replacement and microwave heating |
-
2020
- 2020-06-12 CN CN202010539577.5A patent/CN111520118B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4362213A (en) * | 1978-12-29 | 1982-12-07 | Hydrocarbon Research, Inc. | Method of in situ oil extraction using hot solvent vapor injection |
| CN1601052A (en) * | 2003-09-27 | 2005-03-30 | 中国石油天然气股份有限公司 | Method of integral throughput in multiple wells for extracting thick oil |
| CN109209306A (en) * | 2018-09-12 | 2019-01-15 | 中国石油天然气股份有限公司 | Oil in Super-low Permeability compact oil reservoir horizontal well infuses CO2The asynchronous method for supplementing energy of handling up |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111520118A (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111520118B (en) | Recyclable heavy oil recovery method and system for heating injected solvent underground | |
| CN104040165B (en) | Apparatus and method for energy stores | |
| CN103233713B (en) | Method and process for extracting shale oil gas through oil shale in situ horizontal well fracture chemical destructive distillation | |
| CN105189942B (en) | Emission is handled to improve oil recovery | |
| CN103232852B (en) | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale | |
| CA2643380C (en) | Electro thermal energy storage for in situ recovery of fluid fuel from hydro carbonaceous earth formations | |
| WO2012170114A1 (en) | Methods and systems for providing steam | |
| US8973658B2 (en) | Heat recovery method for wellpad SAGD steam generation | |
| CN108487888A (en) | For improving oil shale in-situ exploitation rate of oil and gas recovery assisted heating device and method | |
| US20140083694A1 (en) | Methods and Systems for Providing Steam | |
| CN107542440A (en) | A kind of method of U-shaped well microwave heating exploitation of gas hydrate | |
| CN107676061A (en) | A kind of method of parallel water horizontal well exploitation offshore natural gas hydrate | |
| CN107514248A (en) | A kind of method of gas hydrates parallel water horizontal well chemical flooding exploitation | |
| CN107542441A (en) | A kind of method of parallel water horizontal well hot-water flooding exploitation of gas hydrate | |
| CN203499663U (en) | Device for extracting shale oil and gas by virtue of fracturing and chemical dry distillation of oil shale in-situ horizontal wells | |
| CN104806218B (en) | A kind of method and system for improving shale gas well recovery | |
| CN111608624B (en) | Method for exploiting heavy oil reservoir by utilizing terrestrial heat | |
| CN107575193A (en) | A kind of method of offshore natural gas hydrate row formula horizontal wells | |
| CN107701150A (en) | A kind of method of offshore natural gas hydrate parallel water horizontal well exploitation | |
| CN114673479A (en) | Based on heterogeneous state CO2Horizon type geothermal strengthening mining method | |
| CN105114045A (en) | CCUS system for extracting oil based on gas lifting method and application thereof | |
| CN204729075U (en) | A kind of petroleum thermal recovery system | |
| CN209761640U (en) | Hot dry rock power generation system | |
| CN216477277U (en) | Offshore heavy oil thermal recovery floating well head platform in shallow sea area | |
| CN105019874A (en) | Oil extraction method utilizing circulated heating cavity gases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |