CN105332679A - Physical simulation method for achieving thermal recovery process of indoor core - Google Patents
Physical simulation method for achieving thermal recovery process of indoor core Download PDFInfo
- Publication number
- CN105332679A CN105332679A CN201510835157.0A CN201510835157A CN105332679A CN 105332679 A CN105332679 A CN 105332679A CN 201510835157 A CN201510835157 A CN 201510835157A CN 105332679 A CN105332679 A CN 105332679A
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- China
- Prior art keywords
- outlet
- crude oil
- core
- viscosity
- rock core
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004088 simulation Methods 0.000 title abstract description 10
- 238000011084 recovery Methods 0.000 title abstract description 6
- 239000010779 crude oil Substances 0.000 claims abstract description 53
- 230000008569 process Effects 0.000 claims abstract description 24
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 4
- 238000010125 resin casting Methods 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 7
- 239000008398 formation water Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000009738 saturating Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 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
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/0875—Well testing, e.g. testing for reservoir productivity or formation parameters determining specific fluid parameters
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)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention relates to a physical simulation method for achieving a thermal recovery process of an indoor core, and mainly aims at solving the problems that an existing indoor thermal recovery simulation method is complicated in system composition, relatively multiple in input devices and unstable in experiment process. The physical simulation method is characterized by comprising the following steps: (1) determining gradient distribution of crude oil viscosity in the core according to the viscosity-temperature relationship of the crude oil and setting into n parts; (2) punching an epoxy resin casting core and dividing the core into n regions; and (3) sectionally saturating the crude oil with different viscosities from an inlet end of the core until the crude oil with n parts of viscosities is saturated. The physical simulation method for achieving the thermal recovery process by the indoor core is simple in technique; and the thermal recovery process is simulated by highly simulating the saturated crude oil with different viscosities in various regions of the core under the formation porosity condition.
Description
Technical field
The present invention relates to a kind of lab simulation thermal process of oil extraction in oil field technical field, especially
oneplant the physical simulating method that laboratory core realizes thermal process.
Background technology
Because Viscosity of Heavy Crude Oil is high, poor fluidity, conventional heavy crude producing is very difficult, but the viscosity of viscous crude is very responsive to temperature, oil recovery by heating, as the Main Means of current heavy oil development, effectively can raise reservoir temperature, reduces Viscosity of Heavy Crude Oil, viscous crude is made to be easy to flowing, thus by viscous crude extraction.And in oil field development technical research, physical simulation experiment technology can reflect subsurface fluid movement rule more truly, it is conventional a kind of research means.At present, the method for lab simulation thermal process is few, and mainly by injecting HTHP hot fluid or adopt electrically heated experimental technique in rock core, these two kinds of methods have the features such as system composition is complicated, and used device is more, and experimentation is unstable.The viscous crude viscosity-temperature curve of the many viscous crude fields of China is skew lines shape, and slope is about the same, and this illustrates that viscous crude is consistent to adding the regularity that heat drop sticks, and this is also the dominant mechanism of heavy crude heat extraction.Therefore to the feature than physical simulating method in the past, according to the hot fluid sphere of action in thermal production well shaft bottom, and the hot fluid temperature situation of change within the scope of this, determine to measure crude oil viscosity at different temperatures in advance by viscosity-temperature curve, the saturated different viscosity crude oil of regional in rock core is adopted to simulate the method for thermal process, Crude viscosity distribution situation in reservoir can not only to be simulated in thermal process more objectively, and technology is simple, and this process does not have HTHP hot fluid medium and Circuits System, and safety is higher.
Summary of the invention
The invention reside in the problem that existing lab simulation thermal process system composition is complicated, used device is more, experimentation is unstable overcoming and exist in background technology, and provide
oneplant the physical simulating method that laboratory core realizes thermal process.This laboratory core realizes the physical simulating method of thermal process, and technology is simple, can altitude simulation formation porosity, and in rock core, thermal process simulated by the saturated different viscosity crude oil of regional.
The present invention solves its problem and reaches by following technical scheme: this laboratory core realizes the physical simulating method of thermal process, comprises the following steps:
1. the glutinous kelvin relation determination rock core Crude Oil viscosity gradient distribution of based on crude, is set to n decile: viscosity is followed successively by μ
1(crude oil is at initial reservoir temperature t
1under viscosity), μ
2(crude oil is at t
2viscosity at temperature), μ
3(crude oil is at t
3viscosity at temperature) ... μ
n(crude oil is at t
nviscosity at temperature), wherein μ
1> μ
2> μ
3> μ
n, t
1<t
2<t
3<t
n;
2. punch on epoxy resin casting rock core and rock core is divided into n region, and at entrance and the exit mounted valve that punches, Fig. 1 is shown in by rock core saturation history schematic diagram;
3. export 1, export 2 ... the valve Close All at outlet n-1 place, rock core vacuumizing and saturated formation water;
4. the 1st take turns in crude oil saturation history, close outlet n, open outlet 1, injecting viscosity from core entry is μ
1(crude oil is at initial reservoir temperature t
1under viscosity) crude oil, until outlet 1 no longer water outlet;
5. the 2nd take turns in crude oil saturation history, close entrance, open outlet 2, injecting viscosity from rock core outlet 1 is μ
2(crude oil is at initial reservoir temperature t
2under viscosity) crude oil, until outlet 2 no longer water outlets;
6. repeat step crude oil saturation history to the n-th 4. and 5. and take turns crude oil saturation history, close outlet n-2, open outlet n, namely injecting viscosity from rock core outlet n-1 is μ
n(crude oil is at t
nviscosity at temperature) crude oil, until outlet n no longer water outlet, complete saturated oils process; Saturated complete, the Crude viscosity distribution schematic diagram formed in rock core as shown in Figure 2.
The present invention can have following beneficial effect compared with above-mentioned background technology: this laboratory core realizes the physical simulating method of thermal process, first target crude oil viscosity is at different temperatures measured, then according to the hot fluid sphere of action in thermal production well shaft bottom, and the hot fluid temperature situation of change within the scope of this, determine the crude oil of the pre-saturated different viscosity of rock core zones of different, Crude viscosity distribution situation in reservoir is simulated in thermal process more objectively with this, technology is simpler, and this process does not have HTHP hot fluid medium to participate in, also Circuits System is not related to, safety is higher.
accompanying drawing illustrates:
Accompanying drawing 1 is rock core saturation history schematic diagram of the present invention;
Accompanying drawing 2 is the viscosity of crude distribution schematic diagrams formed in rock core of the present invention;
Accompanying drawing 3 is rock core saturation history schematic diagrames in the embodiment of the present invention;
Accompanying drawing 4 is the Crude viscosity distribution schematic diagrams formed in rock core in the embodiment of the present invention.
detailed description of the invention:
The invention will be further described below in conjunction with the accompanying drawings and the specific embodiments:
Embodiment 1
This laboratory core realizes the physical simulating method of thermal process, comprises the following steps:
1. one block of rock core is prepared, be of a size of: 30cm × 4.5cm × 4.5cm, the glutinous kelvin relation determination rock core Crude Oil viscosity gradient distribution of based on crude, under formation temperature (70 DEG C) condition, the original viscosity of crude oil is 850mPas, being determined by experiment hot fluid effect zone of reasonableness is about 3/10 injector producer distance, and target heat flux body 4 grade divides sphere of action, and viscosity is respectively: 428mPas(80 DEG C), 120mPas(100 DEG C), 50mPas(120 DEG C) and 23mPas(150 DEG C)
2. punch on epoxy resin casting rock core and rock core is divided into 5 regions (hole depth is suitable for for entering rock core 1CM), distribution is positioned at apart from entrance 21cm(outlet 1), 23.25cm(outlet 2), 25.50cm(outlet 3), 27.75(outlet 4) place, and at punching place mounted valve, Fig. 3 is shown in by rock core saturation history schematic diagram;
3. outlet 1, the valve Close All exporting 2, export 3 and outlet 4 places, rock core vacuumizing and saturated formation water;
4. the 1st take turns in crude oil saturation history, close outlet 5, open outlet 1, from core entry inject viscosity be the viscosity of 850mPas(crude oil under initial reservoir temperature 70 C) crude oil, until outlet 1 no longer water outlet;
5. the 2nd take turns in crude oil saturation history, close entrance, open outlet 2, from rock core outlet 1 inject viscosity be the viscosity of 428mPas(crude oil under initial reservoir temperature 80 DEG C) crude oil, until outlet 2 no longer water outlets;
6. the 3rd take turns in crude oil saturation history, close outlet 1, open outlet 3, from rock core outlet 2 inject viscositys be the viscosity of 120mPas(crude oil under initial reservoir temperature 100 DEG C) crude oil, until outlet 3 no longer water outlets;
7. the 4th take turns in crude oil saturation history, close outlet 2, open outlet 4, from rock core outlet 3 inject viscositys be the viscosity of 50mPas(crude oil under initial reservoir temperature 120 DEG C) crude oil, until outlet 4 no longer water outlets;
8. the 5th take turns in crude oil saturation history, close outlet 3, open outlet 5, from rock core outlet 4 inject viscositys be the viscosity of 23mPas(crude oil under initial reservoir temperature 150 DEG C) crude oil, until outlet 5 no longer water outlets; Complete saturated oils process; Saturated complete, the Crude viscosity distribution formed in rock core as shown in Figure 4.
This physical simulating method can not only to simulate in thermal process Crude viscosity distribution situation in reservoir more objectively, and technology is simple, has supplied effective technology means for studying thermal process better.
Claims (2)
1.
oneplant the physical simulating method that laboratory core realizes thermal process, it is characterized in that: comprise the following steps:
1. the glutinous kelvin relation determination rock core Crude Oil viscosity gradient distribution of based on crude, is set to n decile: crude oil is at initial reservoir temperature t
1,t
2, t
3t
nunder viscosity be followed successively by μ
1, μ
2, μ
3μ
n, wherein μ
1> μ
2> μ
3> μ
n, t
1<t
2<t
3<t
n;
2. punch on epoxy resin casting rock core and rock core is divided into n region, be respectively outlet 1, export 2 ... outlet n, and at entrance and punching exit mounted valve;
3. export 1, export 2 ... the valve Close All at outlet n-1 place, rock core vacuumizing and saturated formation water;
4. the 1st take turns in crude oil saturation history, close outlet n, open outlet 1, injecting viscosity from core entry is μ
1crude oil, until outlet 1 no longer water outlet;
5. the 2nd take turns in crude oil saturation history, close entrance, open outlet 2, injecting viscosity from rock core outlet 1 is μ
2crude oil, until outlet 2 no longer water outlets;
6. repeat step crude oil saturation history to the n-th 4. and 5. and take turns crude oil saturation history, close outlet n-2, open outlet n, namely injecting viscosity from rock core outlet n-1 is μ
ncrude oil, until outlet n no longer water outlet, complete saturated oils process.
2. laboratory core according to claim 1 realizes the physical simulating method of thermal process, it is characterized in that: described step 2. in hole depth for entering rock core 1CM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835157.0A CN105332679B (en) | 2015-11-26 | 2015-11-26 | A kind of laboratory core realizes the physical simulating method of thermal process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835157.0A CN105332679B (en) | 2015-11-26 | 2015-11-26 | A kind of laboratory core realizes the physical simulating method of thermal process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105332679A true CN105332679A (en) | 2016-02-17 |
| CN105332679B CN105332679B (en) | 2018-02-02 |
Family
ID=55283412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510835157.0A Expired - Fee Related CN105332679B (en) | 2015-11-26 | 2015-11-26 | A kind of laboratory core realizes the physical simulating method of thermal process |
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| Country | Link |
|---|---|
| CN (1) | CN105332679B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234216A (en) * | 2022-05-25 | 2022-10-25 | 东营市永昇能源科技有限责任公司 | Method for establishing logging identification layout and application thereof |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115234216A (en) * | 2022-05-25 | 2022-10-25 | 东营市永昇能源科技有限责任公司 | Method for establishing logging identification layout and application thereof |
| CN115234216B (en) * | 2022-05-25 | 2023-09-19 | 东营市永昇能源科技有限责任公司 | Method for establishing logging identification layout and application thereof |
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| Publication number | Publication date |
|---|---|
| CN105332679B (en) | 2018-02-02 |
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Granted publication date: 20180202 Termination date: 20181126 |