CN110344795A - One kind is poly- to drive and well pattern thickening combination and exploitation mode relevance grade evaluation method - Google Patents
One kind is poly- to drive and well pattern thickening combination and exploitation mode relevance grade evaluation method Download PDFInfo
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- CN110344795A CN110344795A CN201910619653.0A CN201910619653A CN110344795A CN 110344795 A CN110344795 A CN 110344795A CN 201910619653 A CN201910619653 A CN 201910619653A CN 110344795 A CN110344795 A CN 110344795A
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- 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
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- 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
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- 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
- 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
Abstract
The present invention relates to the poly- drives of one kind and well pattern thickening combination and exploitation mode relevance grade evaluation method, it is characterised in that including the following contents: S1, establishing polymer flooding, well pattern thickening combination economic evaluation model；S2, technology evaluation is carried out to polymer flooding, well pattern thickening various combination mode；S3, economic evaluation is carried out according to economic evaluation model to polymer flooding, well pattern thickening various combination mode, obtains the oil price scope of application of various combination mode；S4, corresponding rate, well spacing density influence are adopted based on different notes, grading evaluation is carried out to polymer flooding, well pattern thickening various combination mode oil price.The invention proposes different polymer floodings and well pattern thickening combination and exploitation mode oil price relevance grade evaluation method, provide foundation for the reasonable development scheme of determination, and then improve oil field development benefit.
Description
Technical field
The present invention relates to the poly- drives of one kind and well pattern thickening combination and exploitation mode relevance grade evaluation method, are related to oil development
Technical field.
Background technique
Technique of polymer flooding as improve recovery ratio a kind of important means in many oil field large-scale promotion applications.With
Hydrophobic associated polymer is that the structural type complexity polymer of representative has applied to China Bohai Sea region part heavy crude reservoir, should
Quasi polymer shows good adaptability, and obtains preferable exploitation effect.Marine poly- displacing oil-field initial stage mostly uses anti-nine
Point well pattern exploitation, currently, the cipher mode filled the water using row pattern, while partial region is along with polymer flooding.
Onshore oil field has the experience that can largely use for reference in ciphering process, and offshore oilfield is by exploitation environment, platform life span
And the influence of the factors such as economy, and most of offshore oilfield is in exploitation in early days, and the experience that can be used for reference is fewer.Sea
Upper oilfield polymer flooding and well pattern thickening effect depend on many factors, such as well pattern form, cipher mode, polymer flooding and encryption
The factors such as combination.And polymer flooding carries out simultaneously with well pattern thickening, the two interaction mechanism do not study it is clear,
It is different poly- with analysis it is necessary to establish a kind of pair of polymer flooding and well pattern thickening combination and exploitation mode oil price relevance grade evaluation method
Close the effect of object drive and well pattern thickening combination and exploitation mode.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of poly- drives that can be improved oil field development benefit to add with well pattern
Close combination and exploitation mode relevance grade evaluation method.
To achieve the above object, the present invention takes following technical scheme: the present invention provides the poly- drive of one kind and well pattern thickening group
Close development scheme relevance grade evaluation method, including the following contents:
S1, polymer flooding, well pattern thickening combination economic evaluation model are established；
S2, technology evaluation is carried out to polymer flooding, well pattern thickening various combination mode；
S3, economic evaluation is carried out according to economic evaluation model to polymer flooding, well pattern thickening various combination mode, obtained not
With the oil price scope of application of integrated mode；
S4, corresponding rate, well spacing density influence are adopted based on different notes, to polymer flooding, well pattern thickening various combination mode oil
Valence carries out grading evaluation.
Further, the process of polymer flooding, well pattern thickening combination economic evaluation model is established are as follows:
1. calculating year cash inflow:
CI=α × Qoi×P0
In formula, QoiFor yearly rate-oil production, m3；PoFor crude oil price, member/m3；α is crude oil commodity rate, %；
2. calculating year cash flow:
CO=Co+Cr
In formula, CoFor crude oil operating cost, member；CrFor the expenses of taxation, member, wherein the crude oil operating cost side of having oil operating cost,
Fill the water and infuse poly- expense:
Co=QoiCm+QwiPw+QpiPp
In formula, CmFor every side's oil production operation expense, member/m3；QwiFor year water injection rate, m3；PwTo fill the water cost, member/m3；
QpiTo infuse poly- amount, t year；PpFor polymer price, member/t；
The expenses of taxation are replaced using composite tax rate and resources tax two parts:
Cr=α × Qoi×Po×(R+Rs) (4)
In formula, R is composite tax rate, %；RsFor the resources tax tax rate, %；
3. calculating discrete expense:
Discrete expense is the expense generated initial drilling well investment, well pattern thickening and polymerization drive measure adjustment current year:
In formula, n1For basic well pattern well number, mouth；n2Well number, mouth are increased newly for well pattern thickening；D is finishing drilling well depth, m；PdFor list
Position drilling depth cost, member/m；I1sFor the investment of average individual well ground base, member/mouth；I2sPolymer flooding be averaged individual well increase investment,
Member/mouth；Vr1The former well pattern exploitation end of term is averaged the discount value of individual well ground installation residual value, member/mouth；Vr2It is flat that the end of term is exploited for new well
The discount value of equal individual well ground installation residual value, member/mouth；t1Turn polymer flooding opportunity, year；t2To encrypt opportunity, year, IcBenchmark is received
Beneficial rate；
4. the economic evaluation model established are as follows:
In formula, the equal value 0 or 1 of coefficient A, B, C, different valued combinations respectively represent different displacement modes.
Further, technology evaluation is carried out to polymer flooding, well pattern thickening various combination mode are as follows:
1. being established according to target reservoir stratigraphic structure, Oil Reservoir Types, reservoir characteristic, fluid properties, formation pressure and temperature
Typical well group digital-to-analogue simulation model；
2. model of fit history obtains and meets whole district's moisture content that fitting requires；
3. simulating various combination mode, the recovery ratio situation of various combination mode is obtained；
4. various combination mode scheme technology is evaluated.
The invention adopts the above technical scheme, which has the following advantages:
1, the invention proposes different polymer floodings and well pattern thickening combination and exploitation mode oil price relevance grade evaluation method, it is
It determines that reasonable development scheme provides foundation, and then improves oil field development benefit；
2, the present invention carries out the choosing in a manner of polymer flooding and well pattern thickening combination and exploitation using oil price as basic evaluation parameter
It selects, it is intuitive, easily operated；
To sum up, the different Well Pattern And Spacings such as inverted nine-spot pattern, five-spot pattern, determinant well pattern be present invention may be broadly applicable to
Under the conditions of gather drive with well pattern thickening combination and exploitation mode fitness evaluation, wide adaptation range.
Detailed description of the invention
Fig. 1, which is that the present invention is poly-, to be driven and well pattern thickening combination and exploitation mode relevance grade evaluation method flow chart；
Fig. 2 is that polymer solution of the embodiment of the present invention glues dense curve synoptic diagram；
Fig. 3 is that simulation region of embodiment of the present invention composite water cut is fitted schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, poly- drive proposed by the present invention and well pattern thickening combination and exploitation mode relevance grade evaluation method, including with
Lower step:
1, polymer flooding is constructed, economic evaluation model is combined in well pattern thickening.Specifically, polymer flooding, well pattern thickening are established
Combination economic evaluation model needs meet it is assumed hereinafter that condition:
1. cash flow only considers investment, production cost and tax revenue 3.
2. investment cost considers drilling cost, conversion well pattern thickening and the increased investment in fixed assets of polymer flooding, and
The time of measure adjustment only occurs.
3. polymer flooding production cost include polymer expense, chemical agent expense, fee of material, expenditure on power, fuel cost, go straight up to it is winged
Machine takes, supply vessel rent, communicates meteorological service payment, injecting price for repairing, personal services, welfare fund, oil well operation, mining area use
Take, oil vapor treatment expense, administration fee, finance charge, oil field research expense, marine insurance, marine usage expense and other mining costs etc. altogether
19.Polymer expense proportion is larger, and according to amount of polymers measuring and calculating is actually implanted into, other 18 expenses are according to actually occurring
Expense shares measuring and calculating by oil production.
4. the expenses of taxation include resources tax, value-added tax, city planning tax and educational surcharges tax and income tax.Value-added tax, city planning tax, religion
Additional cost tax and income tax is educated to be replaced with the composite tax rate counted in recent years by oil field.
5. depreciation of fixed assets uses 8 years straight-line depreciation methods.
Due to offshore oil field development higher cost, Fast Algorithm for Mining can generate certain benefit in time, choose " net existing
Value method " carries out economic evaluation, and it is as follows to establish polymer flooding, the process of well pattern thickening combination economic evaluation model:
1. calculating year cash inflow, wherein year the expense that is generated mainly from crude oil merchandise sales of cash inflow:
CI=α × Qoi×P0 (1)
In formula, QoiFor yearly rate-oil production, m3；PoFor crude oil price, member/m3；α is crude oil commodity rate, %.
2. calculate year cash flow, wherein year cash flow include produce crude oil operating cost and the expenses of taxation:
CO=Co+Cr (2)
In formula, CoFor crude oil operating cost, member；CrFor the expenses of taxation, member.
Wherein, crude oil the operating cost mainly oily operating cost in the side of having, water filling and the poly- expense of note:
Co=QoiCm+QwiPw+QpiPp (3)
In formula, CmFor every side's oil production operation expense, member/m3；QwiFor year water injection rate, m3；PwTo fill the water cost, member/m3；
QpiTo infuse poly- amount, t year；PpFor polymer price, member/t.
The expenses of taxation are mainly replaced with composite tax rate and resources tax two parts:
Cr=α × Qoi×Po×(R+Rs) (4)
In formula, R is composite tax rate, %；RsFor the resources tax tax rate, %.
3. calculating discrete expense
It is well pattern thickening and polymer flooding that later period, which improves recovery ratio development effectiveness mode, it is assumed that infrastructure investment mainly occurs
In First Year, so discrete expense is mainly to generate initial drilling well investment, well pattern thickening and polymerization drive measure adjustment current year
Expense:
In formula, n1For basic well pattern well number, mouth；n2Well number, mouth are increased newly for well pattern thickening；D is finishing drilling well depth, m；PdFor list
Position drilling depth cost, member/m；I1sFor the investment of average individual well ground base, member/mouth；I2sPolymer flooding be averaged individual well increase investment,
Member/mouth；Vr1The former well pattern exploitation end of term is averaged the discount value of individual well ground installation residual value, member/mouth；Vr2It is flat that the end of term is exploited for new well
The discount value of equal individual well ground installation residual value, member/mouth；t1Turn polymer flooding opportunity, year；t2To encrypt opportunity, year, IcBenchmark is received
Beneficial rate.
4. the economic evaluation model established are as follows:
Formula (6) is water drive, encryption polymer economic evaluation is logical after well pattern thickening, the drive of water drive post-consumer polymer, water drive after water drive
With formula, wherein the equal value 0 or 1 of coefficient A, B, C, different valued combinations respectively represent different displacement modes, are specifically shown in Table 1.
Difference takes over mode coefficient A, B, C value after 1 water drive of table
| Coefficient | Basic water drive | Encrypt water drive | Polymer flooding | Encrypt polymer flooding |
| A | 0 | 0 | 1 | 1 |
| B | 0 | 1 | 0 | 1 |
| C | 0 | 0 | 0 | 1 |
2, polymer flooding, the evaluation of well pattern thickening various combination pattern technology, obtain the recovery ratio of various combination mode, specifically
Process is as follows:
1. establishing exemplary value simulation model, i.e., according to target reservoir stratigraphic structure, Oil Reservoir Types, reservoir characteristic, fluid
Property, formation pressure and temperature establish typical well group digital-to-analogue simulation model, detailed process are as follows:
Prepare data: simulating the essential information of work, including when black-oil simulation, trellis-type, fluid information, oil field development
Between；Reservoir model, including size of mesh opening, sizing grid, grid top bottom depth, porosity, permeability, net-gross ratio)；Fluid PVT
Attribute, including oil/gas/water ground surface density, volume factor, dissolved gas oil ratio, viscosity, concentration, the compressed coefficient；Rock properties,
Including phase percolation curve, capillary pressure curve；The setting of oil reservoir subregion；Initialize calculating parameter, including model reference depth, with reference to depth
Corresponding initial pressure, oil/gas water termination at degree；Export control parameter, the oil/gas including oil field and individual well/water change of production
Curve, pressure history；Manufacturing parameter, production or injection history including well；
Above-mentioned data are input in business digital-to-analogue eclipse software and complete model foundation.
2. model of fit history obtains and meets whole district's moisture content that fitting requires.
According to the actual production data of target block (the oil field block for needing to study) (actual production data include oil, gas,
Water), assignment typical model creation data carries out models fitting, i.e., by adjusting the permeability of model, rock compressibility, phase
Seeping adjustable parameters, the fitting index such as curve, oil/gas water termination is mainly whole district's moisture content, is fitted plot of water cut and actual zone
Block moisture content error reaches fitting and requires within 10%.
3. simulating various combination mode, the recovery ratio of various combination mode is obtained
According to current polymer flooding, well pattern thickening combination and exploitation feature, designs basic water drive, water drive+poly- drive, water drive+and add
Close water drive, water drive+encryption+poly- drive, water drive+poly- drive+encryption, water drive+encryption, which gather, drives five kinds of integrated modes, under each development mode,
Difference take over mode the opportunity of taking over be moisture content be 70%, for example, for water drive+encryption+poly- drive mode, basic water drive contains
When water rate is 70%, encryption water drive is carried out, when moisture content rises to 70% again, carries out polymer flooding, moisture content rises to 70%
When, subsequent waterflooding is carried out, balanced flood is kept during each development scheme.
4. evaluating various combination mode scheme technology
According to 3. middle analog result, compare various combination mode recovery ratio size, recovery ratio is higher, and development effectiveness is better.
3, economic evaluation is carried out according to the economic evaluation model of foundation to polymer flooding, well pattern thickening various combination mode；
Different schemes net present value (NPV) size is calculated with economic evaluation model in step 1, net present value (NPV), which is greater than 0, indicates profit, only
Present worth indicates that no profits came in less than 0, and net present value (NPV) is higher, and development effectiveness is better.According to the oil price of various combination mode net present value equal
Point obtains various combination mode oil price boundary, and then obtains the oil price scope of application of various combination mode.
4, corresponding rate, well spacing density influence are adopted based on different notes, to polymer flooding, well pattern thickening various combination mode oil price
Carry out grading evaluation.
According to different well spacing densities, step 2-3 is repeated, polymer flooding, well pattern thickening under the influence of different well spacing densities are obtained
Various combination mode oil price grading evaluation.
It is commented below by the specific embodiment poly- drive that the present invention will be described in detail and well pattern thickening combination and exploitation mode relevance grade
The concrete application of valence method, the present embodiment are analyzed according to the Bohai Sea oil field A actual conditions, detailed process are as follows:
1, polymer flooding, well pattern thickening combination economic evaluation model are established.
The Bohai Sea oil field A mainly uses inverted nine-spot pattern development scheme, and polymer flooding, well pattern thickening various combination are carried out to it
Mode is studied, and carries out economic evaluation using the economic evaluation model that the present invention establishes, design parameter value is shown in Table 2.
2 Bohai Sea A oilfield economic parameter value of table
| Parameter | Value | Parameter | Value |
| Finishing drilling well depth D, m | 1450 | Crude oil commodity rate α | 0.96 |
| Every meter of drilling depth cost Pd, Wan Yuan/mouth | 1.5 | Base earnings ratio Ic, % | 12 |
| Individual well ground base invests I1s, Wan Yuan/mouth | 200 | Composite tax rate R, % | 31.3 |
| Polymer flooding individual well increases investment I2s, Wan Yuan/mouth | 200 | Resources tax Rs, % | 3.6 |
| Every side's oil operating cost Cm, member/m3 | 700 | Fill the water cost Pw, member/m3 | 13 |
| Polymer price Pp, Wan Yuan/t | 2 |
2, polymer flooding, the evaluation of well pattern thickening various combination pattern technology, detailed process are as follows:
1. establishing exemplary value simulation model
Bohai Sea is established according to target reservoir stratigraphic structure, Oil Reservoir Types, reservoir characteristic, fluid properties, formation pressure and temperature
The extra large oil field A typical case well group digital-to-analogue simulation model, design parameter are shown in Table 3, and polymer glues dense curve such as Fig. 2.
The encryption of 3 Bohai Sea oil field A typical case's well group of table and poly- drive model basic parameter
| Parameter name | Parameter value | Parameter name | Parameter value |
| Oil area, km2 | 2.02 | Oil in place, 104t | 1653 |
| Mean permeability, mD | 1200 | Injection-production ratio | 1:1 |
| Coefficient of permeability variation | 0.6 | Moisture content before encryption/note is poly-, % | 70 |
| Underground crude oil viscosity, mPas | 60 | Basic well pattern well spacing, m | 350 |
| Former well pattern note adopts corresponding rate | 0.7 | Well group number, group | 4 |
2. model history is fitted
According to the actual production data in the Bohai Sea oil field A, assignment typical model creation data carries out models fitting, and fitting refers to
Mark is mainly whole district's moisture content, and Fig. 3 is shown in moisture content matched curve.
3. various combination mode scheme is simulated, the recovery ratio of various combination mode is obtained
According to current polymer flooding, well pattern thickening combination and exploitation feature, designs basic water drive, water drive+poly- drive, water drive+and add
Close water drive, water drive+encryption+poly- drive, water drive+poly- drive+encryption, water drive+encryption, which gather, drives five kinds of integrated modes, under each development mode,
It is moisture content is 70% that difference, which takes over the opportunity of taking over of mode, and balanced flood is kept during each development scheme.
4. various combination mode scheme technology is evaluated
4 are shown in Table according to 3. middle analog result, water drive+encryption is poly- as can be seen from the table drives recovery ratio highest, development effectiveness
Better.
4 polymer of table, well pattern thickening combination and exploitation program simulation result
| Scheme | Recovery ratio, % | Improve recovery ratio, % |
| Water drive | 33.15 | 0 |
| Water drive+poly- drive | 43.27 | 10.12 |
| Water drive+encryption water drive | 39.47 | 6.32 |
| Water drive+encryption+poly- drive | 47.44 | 14.29 |
| Water drive+poly- drive+encryption | 44.31 | 11.16 |
| Water drive+encryption is poly- to drive | 47.49 | 14.34 |
3, polymer flooding, well pattern thickening various combination mode oil price grading evaluation；
Different schemes net present value (NPV) size is calculated with model in step 1, net present value (NPV), which is greater than 0, indicates profit, and net present value (NPV) is less than 0
Indicate that no profits came in, net present value (NPV) is higher, and development effectiveness is better.Difference is obtained according to the oil price point of various combination mode net present value equal
Integrated mode oil price boundary, and then the oil price scope of application of various combination mode is obtained, see Table 5 for details.
(note adopts corresponding rate 0.7, and well is poly- for 5 polymer of table, well pattern thickening combination and exploitation oil price relevance grade evaluation result table
350m)
4, under the influence of different notes adopt corresponding rate, well spacing density, polymer flooding, the classification of well pattern thickening various combination mode oil price
Evaluation；
According to different well spacing densities, step 2-3 is repeated, polymer flooding, well pattern thickening under the influence of different well spacing densities are obtained
Various combination mode oil price grading evaluation only enumerates tri- kinds of situations of well spacing 350m, 260m, 180m herein, is shown in Table 6-8, above-mentioned
Method can carry out organic grading evaluation to various combination development scheme under any well spacing density.
6 polymer of table, well pattern thickening combination and exploitation oil price relevance grade evaluation result table (the poly- 350m of well)
7 polymer of table, well pattern thickening combination and exploitation oil price relevance grade evaluation result table (the poly- 350m of well)
8 polymer of table, well pattern thickening combination and exploitation oil price relevance grade evaluation result table (the poly- 350m of well)
Finally it should be noted that: the above examples are only used to illustrate the technical scheme of the present invention rather than to its protection scope
Limitation, although the application is described in detail referring to above-described embodiment, those of ordinary skill in the art should
Understand: after those skilled in the art read the application, still can to the specific embodiment of application carry out it is various change, modification or
Person's equivalent replacement, but these changes, modification or equivalent replacement, are applying within pending claims.
Claims (3)
- It is driven and well pattern thickening combination and exploitation mode relevance grade evaluation method 1. one kind is poly-, it is characterised in that including the following contents:S1, polymer flooding, well pattern thickening combination economic evaluation model are established；S2, technology evaluation is carried out to polymer flooding, well pattern thickening various combination mode；S3, economic evaluation is carried out according to economic evaluation model to polymer flooding, well pattern thickening various combination mode, obtains different groups The oil price scope of application of syntype；S4, based on it is different note adopt corresponding rate, well spacing density influence, to polymer flooding, well pattern thickening various combination mode oil price into Row grading evaluation.
- 2. poly- drive according to claim 1 and well pattern thickening combination and exploitation mode relevance grade evaluation method, which is characterized in that Establish the process of polymer flooding, well pattern thickening combination economic evaluation model are as follows:1. calculating year cash inflow:CI=α × Qoi×P0In formula, QoiFor yearly rate-oil production, m3；PoFor crude oil price, member/m3；α is crude oil commodity rate, %；2. calculating year cash flow:CO=Co+CrIn formula, CoFor crude oil operating cost, member；CrFor the expenses of taxation, member, wherein the crude oil operating cost side of having oil operating cost, water filling With infuse poly- expense:Co=QoiCm+QwiPw+QpiPpIn formula, CmFor every side's oil production operation expense, member/m3；QwiFor year water injection rate, m3；PwTo fill the water cost, member/m3；QpiFor Infuse poly- amount, t year；PpFor polymer price, member/t；The expenses of taxation are replaced using composite tax rate and resources tax two parts:Cr=α × Qoi×Po×(R+Rs) (4)In formula, R is composite tax rate, %；RsFor the resources tax tax rate, %；3. calculating discrete expense:Discrete expense is the expense generated initial drilling well investment, well pattern thickening and polymerization drive measure adjustment current year:In formula, n1For basic well pattern well number, mouth；n2Well number, mouth are increased newly for well pattern thickening；D is finishing drilling well depth, m；PdFor unit into Ruler cost, member/m；I1sFor the investment of average individual well ground base, member/mouth；I2sPolymer flooding be averaged individual well increase investment, member/mouth； Vr1The former well pattern exploitation end of term is averaged the discount value of individual well ground installation residual value, member/mouth；Vr2The end of term is exploited for new well to be averaged individual well The discount value of ground installation residual value, member/mouth；t1Turn polymer flooding opportunity, year；t2To encrypt opportunity, year, IcBase earnings ratio；4. the economic evaluation model established are as follows:In formula, the equal value 0 or 1 of coefficient A, B, C, different valued combinations respectively represent different displacement modes.
- 3. poly- drive according to claim 1 and well pattern thickening combination and exploitation mode relevance grade evaluation method, which is characterized in that Technology evaluation is carried out to polymer flooding, well pattern thickening various combination mode are as follows:1. being established according to target reservoir stratigraphic structure, Oil Reservoir Types, reservoir characteristic, fluid properties, formation pressure and temperature typical Well group digital-to-analogue simulation model；2. carrying out models fitting according to the actual production data of target block and assignment typical model creation data, obtains to meet and intend Close desired whole district's moisture content；3. simulating various combination mode, the recovery ratio of various combination mode is obtained；4. evaluating various combination mode scheme technology.
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| CN112253079A (en) * | 2020-11-10 | 2021-01-22 | 中国石油天然气股份有限公司 | Method and device for determining well pattern density of oil reservoir |
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