CN110410046A - A kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method - Google Patents
A kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method Download PDFInfo
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- 238000011156 evaluation Methods 0.000 title claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 10
- 238000011161 development Methods 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000011002 quantification Methods 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000010606 normalization Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- 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
- E21B43/20—Displacing by water
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention discloses a kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method, comprising the following steps: obtains the evaluation index parameter of target reservoir；It scores again each evaluation index；Radar map is drawn according to the weight of above-mentioned scoring and each evaluation index；The fan-shaped filling area and perimeter that each index is represented in radar map is calculated by respective formula；On the basis of obtaining the filling area and perimeter of each index, composite evaluation function value is calculated；Quantitative overall merit is finally carried out according to water flooding effectiveness of the evaluation function value obtained above to oil reservoir.The present invention is using the normalization evaluation index standard for considering oil reservoir individual difference and development phase, using improvement radar map method, quantitatively characterizing effect of reservoir development, it is indicated that oil reservoir excavation direction；There is great directive significance to oil reservoir development.
Description
Technical field
The present invention relates to a kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation methods, belong to oil field development technology
Field.
Background technique
Oil field development practice have shown that, waterflooding development oil field can obtain higher ultimate recovery.In China and other states
There is part oil reservoir in family, has stronger natural edge-bottom water energy, and this kind of oil reservoir can sufficiently and rationally utilize its own presence
Natural energy, realize natural water drive exploitation.And because of its geology and displacing agent feature, this kind of oil reservoir breakthrough recovery and final
Recovery ratio is all higher.But major part oil reservoir is all because of the heterogeneity on stratum and the deficiency of natural water body energy both at home and abroad, in order to change
Kind displacement efficiency and maintenance stratum energy, improve oil reservoir ultimate recovery, it is necessary to be aided with artificial recharge.
Fracture-pore reservoir waterflooding development rule is different from conventional crumb shale oil hiding, influence of the fracture and cave reservoir to production feature
It is heavier, and the more complicated multiplicity of water drive law, difficulty is increased for the water flooding effectiveness evaluation study of such oil reservoir.
Water flooding effectiveness evaluation for fracture-pore reservoir, has researcher to develop aqueous dynamic from point of theory at present
Analysis method, and propose specific fracture-pore reservoir water flooding effectiveness evaluation index, commented according to professional standard development system
Valence research, but still have the following problems: 1. index and index used by different scholars are in varying numbers, and systematicness is not strong；②
Water flooding effect evaluation systematic Study is in the presence of no professional standard theory support, and evaluation index is not comprehensive, and index itself has office
It is sex-limited, it is limited to Oil Reservoir Types and development phase.3. existing such effect of reservoir development overall merit has only served " in order to comment
Valence and the appraisal done " does not provide regulating measures direction to oil field subsequent development and suggests, directive significance is poor.
Summary of the invention
The present invention mainly overcomes shortcoming in the prior art, proposes that a kind of fractured-cavernous carbonate reservoir water drive is opened
Send out effect evaluation method.
The present invention solves technical solution provided by above-mentioned technical problem: a kind of fractured-cavernous carbonate reservoir water drive is opened
Send out effect evaluation method, comprising the following steps:
Step S10, the evaluation index parameter of target reservoir is obtained；
Step S20, it scores again each evaluation index；
Step S30, radar map is drawn according to the weight of above-mentioned scoring and each evaluation index；
Step S40, filling area and perimeter fan-shaped in radar map are calculated by the following formula:
θi=2 π wi
In formula: n is the number of evaluation index；riFor the fan-shaped radius in radar map, representing i-th of index；θiFor radar
In figure, the fan-shaped central angle under i-th of index Circular measure is represented；wiFor the weight of each index；L is the perimeter in oil field；S is
The filling area in oil field；
Step S50, it is calculated by the following formula evaluation function again:
v1=S/Smax
v2=L/Lmax
In formula: L is the perimeter in oil field；S is the filling area in oil field；SmaxFor the oil field radar figure ideal filling area；
LmaxFor there is greatest circle perimeter of the same area with the oil field；v1It is ideal for oil field radar totem culture area and oil field radar figure
The ratio of filling area；v2For radar map perimeter and the ratio with the oil field with greatest circle perimeter of the same area；For
Evaluation function；
Step S60, finally quantitative synthesis is carried out according to water flooding effectiveness of the evaluation function obtained above to oil reservoir to comment
Valence.
Further technical solution is that the evaluation index includes recovery ratio, fracture hole controlling extent, water drive fracture hole control journey
Degree, water drive fracture hole development degree, recovery ratio increase rate, square water oil draining rate, pressure holding level, natural declining rate, tired note are adopted
Than, water_bearing escalating rate.
Further technical solution is the specific steps of the step S30 are as follows:
(1) evaluation index is classified, and determines index weights
N equal part is done to circumference with assessment indicator system, obtains N number of reference axis, each reference axis represents development response evaluation
The n-th index of index system reclassifies according to the effect of each index and significance level progress index and weight determines, tentatively presses
Index is by radar map subregion, the fan-shaped central angle θ of each index weights sizeiIt indicates；
(2) evaluation index value quantification treatment
The score size of each index is reflected as to the radius r of radar map concentric circlesiSize.
It then is quantitative comprehensive evaluation again
According to θi、riCalculate filling area S and perimeter L fan-shaped in radar map.
Construct development effectiveness composite evaluation function f (v1,v2), using the composite evaluation function, the waterflooding development in oil field is imitated
Fruit carries out quantitative overall merit.
Beneficial effects of the present invention: the present invention is using the normalization evaluation index for considering oil reservoir individual difference and development phase
Standard, using improvement radar map method, quantitatively characterizing effect of reservoir development, it is indicated that oil reservoir excavation direction；There is weight to oil reservoir development
Big directive significance.
Specific embodiment
Further description is done to the present invention below with reference to embodiment.
A kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method of the invention, comprising the following steps:
Step S10, the evaluation index parameter of target reservoir is obtained, the evaluation index includes recovery ratio, fracture hole control journey
Degree, water drive fracture hole controlling extent, water drive fracture hole development degree, recovery ratio increase rate, square water oil draining rate, pressure keep it is horizontal,
Natural declining rate, tired injection-production ratio, water_bearing escalating rate；
Step S20, each evaluation index is evaluated again, evaluation criteria such as table 1；
Table 1
| Evaluation index type | It is good | Preferably | It is medium | It is poor | Difference |
| Recovery ratio (decimal) | >0.9 | 0.7~0.9 | 0.5~0.7 | 0.4~0.5 | <0.5 |
| Fracture hole controlling extent, % | >60 | 40~60 | 35~40 | 20~35 | <20 |
| Water drive fracture hole controlling extent, % | >55 | 45~55 | 35~45 | 25~35 | <25 |
| Water drive fracture hole development degree, % | >90 | 85~90 | 75~85 | 60~75 | <60 |
| Water_bearing escalating rate (decimal) | ≥2.5 | 2.0~2.5 | 1.5~2.0 | 1.0~1.5 | ≤1 |
| Natural declining rate (decimal) | >0.85 | 0.75~0.85 | 0.65~0.75 | 0.55~0.65 | <0.55 |
| Pressure keeps horizontal (decimal) | >0.95 | 0.9~0.95 | 0.85~0.9 | 0.8~0.85 | <0.8 |
| Square water oil draining rate, % | >75 | 55~75 | 50~55 | 35~50 | <35 |
| Recovery ratio increase rate, % | >15 | 10~15 | 5~10 | 3~5 | <3 |
| Tired injection-production ratio, decimal | >0.75 | 0.65~0.75 | 0.55~0.65 | 0.3~0.55 | <0.3 |
It is converted into score value further according to the evaluation result of each index, wherein the score of the evaluation result of good~difference is followed successively by 5
~1 point；
Step S30, radar map is drawn according to the weight of above-mentioned scoring and each evaluation index；
(1) evaluation index is classified, and determines index weights
N equal part is done to circumference with assessment indicator system, obtains N number of reference axis, each reference axis represents development response evaluation
The n-th index of index system reclassifies according to the effect of each index and significance level progress index and weight determines, tentatively presses
Index is by radar map subregion, the fan-shaped central angle θ of each index weights sizeiIt indicates；
Wherein the weight of above-mentioned each evaluation index is divided into table 2:
Table 2
As shown in table 2, the specific weight of each evaluation index is evaluation index multi-level weight × evaluation index at each point
Weight in grade；
(2) evaluation index value quantification treatment
The score size of index each in step S20 is reflected as to the radius r of radar map concentric circlesiSize；
Step S40, filling area and perimeter fan-shaped in radar map are calculated by the following formula:
θi=2 π wi
In formula: n is the number of evaluation index；riFor the fan-shaped radius in radar map, representing i-th of index；θiFor radar
In figure, the fan-shaped central angle under i-th of index Circular measure is represented；wiFor the weight of each index；L is the perimeter in oil field；S is
The filling area in oil field；
Step S50, it is calculated by the following formula composite evaluation function value again:
v1=S/Smax
v2=L/Lmax
In formula: L is the perimeter in oil field；S is the filling area in oil field；SmaxFor the oil field radar figure ideal filling area；
LmaxFor there is greatest circle perimeter of the same area with the oil field；v1It is ideal for oil field radar totem culture area and oil field radar figure
The ratio of filling area；v2For radar map perimeter and the ratio with the oil field with greatest circle perimeter of the same area；For
Composite evaluation function；
Step S60, finally the water flooding effectiveness of oil reservoir is quantified according to composite evaluation function value obtained above
Overall merit, evaluation result are as shown in table 3.
Table 3
The above is not intended to limit the present invention in any form, although the present invention takes off through the foregoing embodiment
Show, however, it is not intended to limit the invention, any person skilled in the art, is not departing from technical solution of the present invention range
It is interior, made when the technology contents using the disclosure above and change or be modified to the equivalent embodiments of equivalent variations a bit, but it is all not
Be detached from technical solution of the present invention content, according to the technical essence of the invention it is to the above embodiments it is any it is simple modification,
Equivalent variations and modification, still fall within the range of technical solution of the present invention.
Claims (3)
1. a kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method, which comprises the following steps:
Step S10, the evaluation index parameter of target reservoir is obtained；
Step S20, it scores again each evaluation index；
Step S30, radar map is drawn according to the weight of above-mentioned scoring and each evaluation index；
Step S40, filling area and perimeter fan-shaped in radar map are calculated by the following formula:
θi=2 π wi
In formula: n is the number of evaluation index；riFor the fan-shaped radius in radar map, representing i-th of index；θiFor radar map
In, represent the fan-shaped central angle under i-th of index Circular measure；wiFor the weight of each index；L is the perimeter in oil field；S is oil
The filling area in field；
Step S50, it is calculated by the following formula composite evaluation function value again:
v1=S/Smax
v2=L/Lmax
In formula: L is the perimeter in oil field；S is the filling area in oil field；SmaxFor the oil field radar figure ideal filling area；LmaxFor
There is greatest circle perimeter of the same area with the oil field；v1For oil field radar totem culture area and oil field radar figure ideal fill surface
Long-pending ratio；v2For radar map perimeter and the ratio with the oil field with greatest circle perimeter of the same area；It is commented for synthesis
Valence function；
Step S60, quantitative synthesis is finally carried out according to water flooding effectiveness of the composite evaluation function value obtained above to oil reservoir
Evaluation.
2. a kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method according to claim 1, feature exist
In the evaluation index includes recovery ratio, fracture hole controlling extent, water drive fracture hole controlling extent, water drive fracture hole development degree, harvesting
Rate increase rate, square water oil draining rate, pressure keep level, natural declining rate, tired injection-production ratio, water_bearing escalating rate.
3. a kind of fractured-cavernous carbonate reservoir water flooding effectiveness evaluation method according to claim 2, feature exist
In the specific steps of the step S30 are as follows:
(1) evaluation index is classified, and determines index weights
N equal part is done to circumference with assessment indicator system, obtains N number of reference axis, each reference axis represents development response evaluation index
The n-th index of system reclassifies according to the effect of each index and significance level progress index and weight determines, tentatively presses index
By radar map subregion, the fan-shaped central angle θ of each index weights sizeiIt indicates；
(2) evaluation index value quantification treatment
The score size of each index is reflected as to the radius r of radar map concentric circlesiSize.
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Cited By (3)
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| CN112049629A (en) * | 2020-10-20 | 2020-12-08 | 西南石油大学 | Fracture-cavity type oil reservoir recovery ratio prediction method based on A-type water drive characteristic curve |
| CN113220742A (en) * | 2021-05-08 | 2021-08-06 | 施耀凯 | Comprehensive evaluation method for water-drive reservoir development effect |
| CN114622878A (en) * | 2020-12-08 | 2022-06-14 | 中国石油天然气股份有限公司 | Ultra-low-ultra-low permeability reservoir waterflood development adaptability discrimination method and device |
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| CN114622878A (en) * | 2020-12-08 | 2022-06-14 | 中国石油天然气股份有限公司 | Ultra-low-ultra-low permeability reservoir waterflood development adaptability discrimination method and device |
| CN114622878B (en) * | 2020-12-08 | 2023-07-25 | 中国石油天然气股份有限公司 | Ultra-low-ultra-low permeability reservoir water flooding development adaptability judging method and device |
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