CN110263439A - Separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough - Google Patents
Separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000005516 engineering process Methods 0.000 title claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 230000001020 rhythmical effect Effects 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 49
- 230000033764 rhythmic process Effects 0.000 claims description 21
- 150000001875 compounds Chemical class 0.000 claims description 20
- 230000035699 permeability Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 4
- 239000003129 oil well Substances 0.000 claims description 4
- 230000008447 perception Effects 0.000 claims description 4
- 230000002571 modificatory effect Effects 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 241000184339 Nemophila maculata Species 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims 1
- 230000008595 infiltration Effects 0.000 claims 1
- 238000001764 infiltration Methods 0.000 claims 1
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- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- E21B43/20—Displacing by water
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Abstract
The invention discloses separate zone waterflooding technology policy demarcation lines before a kind of oil reservoir water breakthrough, it comprises the following steps that comprehensive considering various effects first, establish a series of injection-production well group typical models, then the numerical simulation study that multilayer closes note is carried out to model, it is differential as the quasi- number of longitudinal equalization displacement using the water breakthrough time, lack of balance degree is longitudinally employed before evaluating oil reservoir water breakthrough using Lorentz coefficient；Finally according to Lorentz coefficient warning value determine different rhythmic naturies, different well pattern form oil reservoir water breakthrough before seperated layer water injection technical limits.Separate zone waterflooding technology policy demarcation line is more accurate, simple, easy to operate before oil reservoir water breakthrough provided by the invention, can provide guidance for the division of Oil Field separate zone waterflooding technology policy demarcation line, so as to improve effect of reservoir development, improves oil recovery.
Description
Technical field
The present invention relates to oil-gas field development technical field, separate zone waterflooding technology policy circle before a kind of oil reservoir water breakthrough is referred in particular to
Limit；Propose different rhythmic naturies, different well pattern form oil reservoir water breakthrough before seperated layer water injection technical limits, field application is more
Add accurate, conveniently.
Background technique
Chinese oilfield reservoir is largely continental clastic deposited sediments, and vertical heterogeneity is strong, and interlayer contradiction is serious, layering note
Water is to mitigate interlayer contradiction, increases production the important measures of stable yields, is widely used in oil field development.In practical oil field,
Often there is tens even a substratums up to a hundred, current techniques still can not achieve complete seperated layer water injection, therefore layering note
The division of water technical limits is most important, and the division of separate zone waterflooding technology policy demarcation line is wherein extremely important before water breakthrough
A part.
There is various limitations for traditional seperated layer water injection boundary: 1. in the primary stage, usually in seperated layer water injection list
On the basis of factor boundary, to whether meeting each factor boundary and determined one by one.This method has ignored the friendship between each factor
Mutually influence.2. carrying out fuzzy comprehensive evoluation on the basis of single factor test boundary in transition stage.During fuzzy evaluation, power
The setting of weight has stronger subjectivity；Weight is obtained even with analytic hierarchy process (AHP), initial scale matrix is also difficult to gram
Take the influence of subjectivity.3. considering the difference of each layer saturation degree in development process in developing stage, the general of quasi- filtrational resistance is introduced
It reads, establishes its differential boundary, but this is still equivalent single-phase flow thought, it is difficult to reflect the non-piston of water drive oil before water breakthrough.
Summary of the invention
The purpose of the present invention is to provide separate zone waterflooding technology policy demarcation lines before a kind of oil reservoir water breakthrough, quantitatively give not
Separate zone waterflooding technology policy demarcation line table before same rhythmic nature, different well pattern form water breakthroughs, it is simple, easy to operate, it is developed for Oil Field
Guidance is provided, so as to improve effect of reservoir development, improves oil recovery.
To achieve the above object, the present invention provides separate zone waterflooding technology policy demarcation lines before a kind of oil reservoir water breakthrough.The oil reservoir
Separate zone waterflooding technology policy demarcation line includes the following steps: before water breakthrough
(1) comprehensive considering various effects establish a series of injection-production well group typical models.
(2) numerical simulation study that multilayer closes note is carried out to model.
(3) according to model data, computation model water breakthrough time and water breakthrough time are differential.
(4) according to numerical simulation result, Lorentz coefficient before computation model water breakthrough.
(5) according to the model water breakthrough time is differential and Lorentz coefficient, separate zone waterflooding technology policy circle before oil reservoir water breakthrough is determined
Limit table.
The step of injection-production well group typical model is established in the step 1 is as follows:
(1) comprehensively consider the different numbers of plies, different permeability grades, different thickness, different interfloor distances, different crude oil viscosities
The influence of differential 5 kinds of factors, every kind of factor take 5 levels, and detailed data is shown in Table 3.
The typical note of table 3 adopts the factor level table of model
(2) L25 (55) orthogonal test table is selected to be combined parameter.
(3) the factor level combination table obtained according to orthogonal test table, to positive rhythm, the anti-rhythm, compound positive rhythm, compound
The anti-rhythm, the compound positive and negative rhythm, compound every kind of rhythmic nature of the rhythm anyway all establish 25 notes and adopt model.
(4) each model be arranged 5 points, 7 points anti-, 9 points anti-, face row pattern and staggeredly five kinds of row well pattern it is different
Well pattern form.
The concrete operations of the step 2 are: after the completion of all model foundations, each model carry out respectively 5 points, it is anti-
7 points, 9 points anti-, face row pattern and staggeredly under five kinds of different well pattern forms of row well pattern 20 years by a definite date multilayer close note mould
Quasi- production.
Steps are as follows for water breakthrough time differential calculating in the step 3:
(1) calculating for carrying out model each layer water breakthrough time first, when selecting different water breakthroughs according to different well pattern forms
Between calculation method, face row well pattern, staggeredly row well pattern selects non-piston factorization method, sees formula (1~3).
E=kro(Swc)I(Swf)-fw'(Swf) (12)
In formula: tDfFor the zero dimension water breakthrough time；E is the non-piston factor；SwFor water saturation, f；SwfIt is aqueous full for leading edge
And degree, f；krw、kroRespectively water phase permeability and oleic permeability, f；fwFor moisture content, f；μw、μoFor respectively oil phase and water
The viscosity of phase, mPas.
5 points, 7 points anti-, inverted nine-spot pattern use improved areal well pattern water breakthrough time calculation formula.See formula (4~
8)。
D=C+Blnd-Alnrw (17)
In formula: A, C, D, F are intermediate variable；tfFor water breakthrough time, s；M is injection-to-producing well ratio；K is Reservoir Permeability, μ
m2；D is injector producer distance, cm；rwFor oil well radius, cm；Δ p is injection production pressure difference, 10-1MPa；φ is porosity, f；SwcFor constraint
Water saturation, f；It is averaged water saturation for two-phase section before water breakthrough, f；CsFor Area modificatory coefficient.
(2) water breakthrough time for calculating each model according to model each layer water breakthrough time is differential.Water breakthrough time differential calculating side
Method is shown in formula (9).
tfd=tfmax/tfmin (19)
In formula: tfdIt is differential for the model water breakthrough time；tfmaxFor the maximum water breakthrough time in same model；tfminFor same mould
The minimum water breakthrough time in type
Lorentz curve is initially a kind of curve for describing Wealthy distribution in the step 4, be used to describe social income
The unequal degree of distribution, after be applied to multiple fields.Lorentz curve is applied to oil reservoir longitudinal equalization and employed by the present invention
Evaluation on, substratum is ranked up according to permeability size, using each layer reserves accumulative perception as abscissa, with each layer yield
Accumulation contribution rate is ordinate, draws Lorentz curve.The bending degree of Lorentz curve is bigger, then oil reservoir is longitudinally employed more not
It is balanced.
Lorentz coefficient can intuitively embody oil reservoir and generally longitudinally employ lack of balance degree in the step 4.Lorentz
Coefficient is bigger, and it is bigger that lack of balance degree is employed in the longitudinal direction of oil reservoir.
Lorentz coefficient calculation formula is shown in formula (20).
In formula: GiFor Lorentz coefficient；XijFor the reserves accumulative perception of jth substratum, %；YijFor the yield of jth substratum
Accumulate contribution rate, %.
Lorentz coefficient warning value in the step 5 is 0.382, using 0.382 as too much difference between the rich and the poor in economics
Lorentz coefficient warning value, the present invention is used for reference in the evaluation of reservoir equilibrium producing, using 0.382 as the long-range navigation of seperated layer water injection
Hereby coefficient warning value, if model Lorentz coefficient is higher than 0.382, then it is assumed that the model needs to carry out seperated layer water injection.
The concrete operation step of the step 5 are as follows:
(1) differential according to each model Lorentz coefficient and water breakthrough time that are calculated, find out different rhythmic naturies, different wells
The Lorentz coefficient of pessimistic concurrency control and the water breakthrough time it is differential between linear relationship.
(2) boundary of the quasi- number of equilibrium displacement, i.e., different rhythmic naturies, difference are finally determined according to Lorentz coefficient warning value
Separate zone waterflooding technology policy demarcation line before the oil reservoir water breakthrough of well pattern form.
The quasi- number boundary table of equilibrium displacement before 4 oil reservoir water breakthrough of table
| Well pattern form | Positive rhythm | The anti-rhythm | Compound positive rhythm | The compound anti-rhythm | The compound positive and negative rhythm | The compound rhythm anyway |
| Five-spot pattern | 3.03 | 2.94 | 3.38 | 3.04 | 3.06 | 2.63 |
| Anti- seven spot pattern | 2.96 | 3.04 | 3.06 | 3.48 | 2.54 | 3.10 |
| Inverted nine-spot pattern | 3.23 | 3.48 | 2.54 | 3.10 | 2.58 | 2.96 |
| Face row well pattern | 3.36 | 3.10 | 2.58 | 2.36 | 2.58 | 3.02 |
| Staggeredly row well pattern | 3.68 | 3.36 | 2.78 | 3.38 | 3.38 | 2.70 |
In the step 5 before oil reservoir water breakthrough the quasi- number boundary table of equilibrium displacement application method are as follows: when calculating the water breakthrough of oil reservoir
Between it is differential, the quasi- number boundary of corresponding equilibrium displacement is corresponded to according to the rhythmic nature of oil reservoir and well pattern form in table 4, if be higher than should
The quasi- number boundary of equilibrium displacement, then the oil reservoir needs to carry out seperated layer water injection, if being lower than the quasi- number boundary of the equilibrium displacement, does not need reality
Apply seperated layer water injection.
Detailed description of the invention
Fig. 1 is is built the citing of injection-production well group typical model schematic diagram.
Fig. 2 is Lorentz curve schematic diagram citing before model water breakthrough.
Fig. 3 is that model Lorentz coefficient and water breakthrough time differential relational graph are illustrated
Specific embodiment
Below by specific embodiment, the invention will be further described, so that those skilled in the art can be better
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough of the present invention, specific implementation the following steps are included:
The selected quasi- injection-production well group for carrying out seperated layer water injection of step (1), collects following basic data: flowing bottomhole pressure (FBHP), ground lamination
Power, each layer effective thickness, viscosity of crude, permeability, wellbore radius, well pattern form, relative permeability data.
It is differential to calculate the injection-production well group water breakthrough time according to the injection-production well group well pattern form for step (2).
(1) calculating for carrying out model each layer water breakthrough time first, when selecting different water breakthroughs according to different well pattern forms
Between calculation method, face row well pattern, staggeredly row well pattern selects non-piston factorization method, sees formula (21~23).
E=kro(Swc)I(Swf)-fw'(Swf) (22)
In formula: tDfFor the zero dimension water breakthrough time；E is the non-piston factor；SwFor water saturation, f；SwfIt is aqueous full for leading edge
And degree, f；krw、kroRespectively water phase permeability and oleic permeability, f；fwFor moisture content, f；μw、μoFor respectively oil phase and water
The viscosity of phase, mPas.
5 points, 7 points anti-, inverted nine-spot pattern use improved areal well pattern water breakthrough time calculation formula.See formula (24~
28)。
D=C+Blnd-Alnrw (27)
In formula: A, C, D, F are intermediate variable；tfFor water breakthrough time, s；M is injection-to-producing well ratio；K is Reservoir Permeability, μ
m2；D is injector producer distance, cm；rwFor oil well radius, cm；Δ p is injection production pressure difference, 10-1MPa；φ is porosity, f；SwcFor constraint
Water saturation, f；It is averaged water saturation for two-phase section before water breakthrough, f；CsFor Area modificatory coefficient.
(2) water breakthrough time for calculating each model according to model each layer water breakthrough time is differential.Water breakthrough time differential calculating side
Method is shown in formula (9).
tfd=tfmax/tfmin (19)
Step (3) is according to the rhythmic nature and well pattern form of oil reservoir, in conjunction with different rhythmic naturies provided by the invention, different wells
Separate zone waterflooding technology policy demarcation line table before the water breakthrough of web form finds the quasi- number boundary of corresponding equilibrium displacement, if being higher than the equilibrium
The quasi- number boundary of displacement, then the oil reservoir needs to carry out seperated layer water injection, if being lower than the quasi- number boundary of the equilibrium displacement, does not need to implement to divide
Layer water filling.
Step (4) is if the well group needs to carry out seperated layer water injection, according to the quasi- number boundary of corresponding equilibrium displacement, by separate injection layer
The water breakthrough time of section, differential control was within the quasi- number boundary of the equilibrium displacement.
It is the embodiment operated according to above-mentioned steps below
Each layer position essential information of object element and statistics of tabulating are obtained by investigation first.The A1 well group of certain stratified reservoir is total
12 layers are shared, which now uses inverted nine-spot pattern waterflooding extraction, oil volume factor 1.2, underground water viscosity 0.5mPas,
Viscosity of crude 80mPas, oil well radius 0.1m, distance 250m between water injection well and producing well, injection production pressure difference 2.5MPa.A1 well
The each substratum permeability of group, porosity and thickness data are shown in Table 5.1 relative permeability data of A1 well group layer are shown in Table 6.
Each substratum parameter list of 5 A1 well group of table
6 A1 well group layer of table, 1 relative permeability data
| Sw | krw | kro | fw(Sw) |
| 0.40 | 0.0000 | 1.0000 | 0.0000 |
| 0.47 | 0.0350 | 0.8800 | 0.3231 |
| 0.49 | 0.0511 | 0.6108 | 0.5010 |
| 0.53 | 0.0819 | 0.2762 | 0.7806 |
| 0.56 | 0.1001 | 0.1718 | 0.8749 |
| 0.66 | 0.1722 | 0.0366 | 0.9826 |
| 0.71 | 0.2183 | 0.0140 | 0.9947 |
| 0.73 | 0.2361 | 0.0080 | 0.9972 |
| 0.78 | 0.2902 | 0.0000 | 1.0000 |
The development time (being shown in Table 7) before A1 well group water breakthrough is calculated, it is 4.81 that it is differential, which can to obtain the well group water breakthrough time,.
The 7 A1 well group water breakthrough time of table
| Layer position | Water breakthrough time/day | Layer position | Water breakthrough time/day |
| 1 | 1530.44 | 7 | 1795.50 |
| 2 | 2013.32 | 8 | 1659.11 |
| 3 | 1344.40 | 9 | 1308.01 |
| 4 | 1303.20 | 10 | 861.07 |
| 5 | 1327.56 | 11 | 2128.13 |
| 6 | 1441.64 | 12 | 4168.56 |
The well group rhythmic nature is more complex, but rhythmic nature and the compound positive and negative rhythm are more similar, therefore uses for reference compound positive and negative
The separate zone waterflooding technology policy demarcation line of the rhythm, the quasi- number of equilibrium displacement is 2.58, A1 well group water breakthrough before the water breakthrough of the compound positive and negative rhythm
Time is 4.81, reaches separate zone waterflooding technology policy demarcation line before water breakthrough, needs to carry out seperated layer water injection.
The well group is layered according to each substratum water breakthrough time, the separate injection interval water breakthrough time it is differential control 2.58 with
It is interior, the well group is from top to bottom divided into two separate injection intervals (being shown in Table 8).
8 A1 well group seperated layer water injection interval of table divides
| Separate injection interval | Substratum | Water breakthrough time is differential |
| Separate injection interval one | 1-10 layers | 2.33 |
| Separate injection interval two | 11,12 layers | 1.95 |
As shown in table 8, it is 2.33 that the water breakthrough time of separate injection interval one is differential, and the water breakthrough time of separate injection interval two is differential to be
1.95, by layering, each separate injection interval permeability is analyzed it can be found that separate injection interval one is compound positive rhythm, separate injection interval two
For positive rhythm, it is layered result and meets separate zone waterflooding technology policy demarcation line before the water breakthrough of division.Formation parameter is analyzed it can be found that seeping
Differential saturating rate is 5.29, and larger permeability grade is that the well group needs the main reason for carrying out seperated layer water injection.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (9)
1. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough comprising following steps:
(1) comprehensive considering various effects establish a series of injection-production well group typical models.
(2) numerical simulation study that multilayer closes note is carried out to model.
(3) according to model data, computation model water breakthrough time and water breakthrough time are differential.
(4) according to numerical simulation result, Lorentz coefficient before computation model water breakthrough.
(5) according to the model water breakthrough time is differential and Lorentz coefficient, separate zone waterflooding technology policy demarcation line table before oil reservoir water breakthrough is determined.
2. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
The step of injection-production well group typical model is established in rapid 1 is as follows:
(1) it is differential to comprehensively consider the different numbers of plies, different permeability grades, different thickness, different interfloor distances, different crude oil viscosities
The influence of 5 kinds of factors, every kind of factor take 5 levels, and detailed data is shown in Table 1.
The typical note of table 1 adopts the factor level table of model
(2) L25 (55) orthogonal test table is selected to be combined parameter.
(3) the factor level combination table obtained according to orthogonal test table, to positive rhythm, the anti-rhythm, compound positive rhythm, compound anti-rhythm
Rule, the compound positive and negative rhythm, compound every kind of rhythmic nature of the rhythm anyway all establish 25 notes and adopt model.
(4), anti-, anti-, face row pattern and staggeredly five kinds of different well patterns of row well pattern are arranged at 5 points at 7 points at 9 points in each model
Form.
3. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Rapid 2 concrete operations are: after the completion of all model foundations, each model carry out respectively 5 points, it is 7 points anti-, 9 points anti-, just
To row pattern and staggeredly under five kinds of different well pattern forms of row well pattern, 20 years by a definite date multilayers close the simulated production infused.
4. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Steps are as follows for water breakthrough time differential calculating in rapid 3:
(1) calculating for carrying out model each layer water breakthrough time first, selects the different water breakthrough times to count according to different well pattern forms
Calculation method, face row well pattern, staggeredly row well pattern selects non-piston factorization method, sees formula (1~3).
E=kro(Swc)I(Swf)-fw'(Swf) (2)
In formula: tDfFor the zero dimension water breakthrough time；E is the non-piston factor；SwFor water saturation, f；SwfContain water saturation for leading edge
Degree, f；krw、kroRespectively water phase permeability and oleic permeability, f；fwFor moisture content, f；μw、μoFor respectively oil phase and water phase
Viscosity, mPas.
5 points, 7 points anti-, inverted nine-spot pattern use improved areal well pattern water breakthrough time calculation formula.See formula (4~8).
D=C+B ln d-A ln rw (7)
In formula: A, C, D, F are intermediate variable；tfFor water breakthrough time, s；M is injection-to-producing well ratio；K is Reservoir Permeability, μm2；D is
Injector producer distance, cm；rwFor oil well radius, cm；Δ p is injection production pressure difference, 10-1MPa；φ is porosity, f；SwcTo fetter water saturation
Degree, f；SwIt is averaged water saturation for two-phase section before water breakthrough, f；CsFor Area modificatory coefficient.
(2) water breakthrough time for calculating each model according to model each layer water breakthrough time is differential.Water breakthrough time, differential calculation method was shown in
Formula (9).
tfd=tfmax/tfmin (9)
In formula: tfdIt is differential for the model water breakthrough time；tfmaxFor the maximum water breakthrough time in same model；tfminFor in same model
The minimum water breakthrough time.
5. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Lorentz curve is initially a kind of curve for describing Wealthy distribution in rapid 4, be used to describe the unequal journey of distribution of social income
Degree, after be applied to multiple fields.Lorentz curve is applied in the evaluation that oil reservoir longitudinal equalization is employed by the present invention, according to infiltration
Saturating rate size is ranked up substratum, and it is vertical for accumulating contribution rate as abscissa, with each layer yield using each layer reserves accumulative perception
Coordinate draws Lorentz curve.The bending degree of Lorentz curve is bigger, then oil reservoir is longitudinally employed more unbalanced.
6. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Lorentz coefficient can intuitively embody oil reservoir and generally longitudinally employ lack of balance degree in rapid 4.Lorentz coefficient is bigger, oil reservoir
It is bigger that lack of balance degree is employed in longitudinal direction.
Lorentz coefficient calculation formula is shown in formula (10).
In formula: GiFor Lorentz coefficient；XijFor the reserves accumulative perception of jth substratum, %；YijIt is accumulated for the yield of jth substratum
Contribution rate, %.
7. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Lorentz coefficient warning value in rapid 5 is 0.382, is guarded against in economics using 0.382 as the Lorentz coefficient of too much difference between the rich and the poor
Value, the present invention is used for reference reservoir equilibrium producing and is evaluated, using 0.382 as the Lorentz coefficient warning value of seperated layer water injection,
If model Lorentz coefficient is higher than 0.382, then it is assumed that the model needs to carry out seperated layer water injection.
8. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
Rapid 5 concrete operation step are as follows:
(1) differential according to each model Lorentz coefficient and water breakthrough time that are calculated, find out different rhythmic naturies, different well pattern moulds
The Lorentz coefficient of type and the water breakthrough time it is differential between linear relationship.
(2) boundary of the quasi- number of equilibrium displacement, i.e., different rhythmic naturies, different well patterns are finally determined according to Lorentz coefficient warning value
Separate zone waterflooding technology policy demarcation line before the oil reservoir water breakthrough of form.
The quasi- number boundary table of equilibrium displacement before 2 oil reservoir water breakthrough of table
。
9. separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough according to claim 1, it is characterised in that: the step
In rapid 5 before oil reservoir water breakthrough the quasi- number boundary table of equilibrium displacement application method are as follows: the water breakthrough time for calculating oil reservoir is differential, according to oil reservoir
Rhythmic nature and well pattern form the quasi- number boundary of corresponding equilibrium displacement is corresponded in table 2, if be higher than equilibrium displacement Zhun Shuo circle
Limit, then the oil reservoir needs to carry out seperated layer water injection, if being lower than the quasi- number boundary of the equilibrium displacement, does not need to implement seperated layer water injection.
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| CN110617042A (en) * | 2019-10-12 | 2019-12-27 | 中国石油化工股份有限公司 | Layered water injection regulation and control method for high water-consumption zone development oil reservoir |
| CN110765624A (en) * | 2019-10-29 | 2020-02-07 | 中国石油化工股份有限公司 | Reasonable layering method for water injection oil reservoir |
| CN110924910A (en) * | 2019-11-26 | 2020-03-27 | 中国石油大学(华东) | Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole |
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| CN112329192A (en) * | 2020-03-03 | 2021-02-05 | 中国海洋石油集团有限公司 | Thick-layer sandstone reservoir polymer injection balanced displacement design method |
| CN114165227A (en) * | 2020-09-11 | 2022-03-11 | 中国石油化工股份有限公司 | Flow field adjustment feasibility quantitative evaluation method based on reservoir equilibrium displacement |
| CN114645699A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Method for rapidly evaluating oil reservoir development equilibrium in ultrahigh water cut period |
| CN115422789A (en) * | 2022-11-07 | 2022-12-02 | 中国石油大学(华东) | Prediction method and system for optimizing water drive recovery ratio of fault block oil reservoir in consideration of whole process |
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| CN110617042A (en) * | 2019-10-12 | 2019-12-27 | 中国石油化工股份有限公司 | Layered water injection regulation and control method for high water-consumption zone development oil reservoir |
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| CN114165227A (en) * | 2020-09-11 | 2022-03-11 | 中国石油化工股份有限公司 | Flow field adjustment feasibility quantitative evaluation method based on reservoir equilibrium displacement |
| CN114165227B (en) * | 2020-09-11 | 2024-03-01 | 中国石油化工股份有限公司 | Quantitative evaluation method for flow field adjustment feasibility based on oil reservoir balanced displacement |
| CN114645699A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Method for rapidly evaluating oil reservoir development equilibrium in ultrahigh water cut period |
| CN115422789A (en) * | 2022-11-07 | 2022-12-02 | 中国石油大学(华东) | Prediction method and system for optimizing water drive recovery ratio of fault block oil reservoir in consideration of whole process |
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