CN109829586A - Oil increment evaluation method for low-permeability reservoir polymer microsphere deep profile control technology - Google Patents
Oil increment evaluation method for low-permeability reservoir polymer microsphere deep profile control technology Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims abstract description 32
- 238000011156 evaluation Methods 0.000 title claims abstract description 24
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 239000004005 microsphere Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 78
- 230000001965 increasing effect Effects 0.000 claims abstract description 12
- 230000003247 decreasing effect Effects 0.000 claims abstract description 10
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims description 61
- 230000007423 decrease Effects 0.000 claims description 25
- 238000012937 correction Methods 0.000 claims description 17
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 238000011161 development Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000001186 cumulative effect Effects 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
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention discloses an oil increment evaluation method for a low permeability reservoir polymer microsphere deep profile control technology, which comprises the steps of drawing an actual daily oil production curve of a polymer microsphere profile control implementation area; carrying out descending prediction after profile control by utilizing the descending trend of the profile control implementation area of the polymer microspheres; and comparing the relation between the actual daily oil yield and the predicted daily oil yield after the profile control is implemented, calculating the oil increment and evaluating the implementation effect. The method can more intuitively reflect the relation between the actual daily oil yield and the predicted daily oil yield after the implementation of the profile control measures, and further objectively evaluate the effect after the profile control measures. Meanwhile, the oil increasing amount calculated by the method is more consistent with the decreasing rule of oil field development, and the data is more persuasive.
Description
Technical field
The invention belongs to reservoir evaluation technical fields, and in particular to a kind of low-permeability oil deposit polymer microballoon deep profile correction skill
Art oil increment evaluation method.
Background technique
Extra permeability oilfield reservoir is fine and close, and permeability is small, generally below 10md, and pore throat size is nano-micro level.It is special hypotonic
Saturating oil field needs to carry out raising recovery efficiency technique after entering high water-cut stage, for controlling rate of water cut increase, sufficiently employs surplus
Excess oil guarantees that oil field continuously steady production is significant.
Extra permeability oilfield is restricted by reservoir conditions, and with the extension of development time, increasing of successively decreasing, production loss is serious.
Polymer microballoon is nanoscale since partial size is small, and stratum can be injected by water injection well and carries out oil reservoir transfer drive, and can be carried in water filling
Effect is lower toward deep migration between oil-water well, avoids and accumulates in water injection well near wellbore.The characteristic of this deep migration is mainly made
With being exactly, after filling the water and repeatedly washing away, remaining oil distribution is few, and deep position remaining oil enrichment between oil-water well, micro- near wellbore zone
After ball enters deep delay, flow direction-changing can be made, the crude oil that displacement is not employed plays the purpose for improving yield.
Polymer microballoon improving ecology technology can be improved directly unlike wellfracturing or other offensive measures
The effect for having a net increase of oil is realized in well yield.Its main function, which still passes through, offsets successively decreasing for a part of oil reservoir, produces to reach balance
Amount, keeps the effect of stable yields.And traditional profile control measures effect evaluation method, or using the algorithm for having a net increase of oil, both by arranging
Applying rear yield and subtracting before measure yield reduces the machine that oil field is successively decreased as the increased oil mass of profile control, such evaluation method and transfer drive
It manages inconsistent, does not account for the natural depletion of oil reservoir, it is difficult to the objective true oil increment of reaction.The present invention provides a kind of new
Polymer microballoon deep profile correction technology oil increment evaluation method, it can be considered that factor of successively decreasing, the oil increment of calculating is more accurate
Effectively.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of low-permeability oil
Polymer microballoon deep profile correction technology oil increment evaluation method is hidden, the increasing of polymer microballoon deep profile correction technology is more objectively calculated
Oily effect.
The invention adopts the following technical scheme:
A kind of low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method, which is characterized in that draw poly-
It closes object microballoon transfer drive and implements the practical day oil-producing curve in region；It is carried out using the decline trend for implementing region to polymer microballoon transfer drive
Prediction of successively decreasing after transfer drive；The relationship for comparing practical daily oil production and prediction daily oil production after transfer drive is implemented, calculates oil increment simultaneously
Evaluate implementation result.
Specifically, the following steps are included:
S1, it collects block and implements monthly output data before polymer microballoon transfer drive, draw yield-production month curve；
S2, according to step S1 draw yield-production month curve, to implement region transfer drive implement before oil-producing data carry out
Hyperbolic fitting, oil production is predicted after being implemented by matched curve to transfer drive；
The relationship of practical daily oil production and prediction daily oil production, calculates actual production after transfer drive after S3, comparison transfer drive are implemented
Area among curve and matched curve obtains increased yield after transfer drive.
Further, in step S1, monthly output data are no less than 6 months before taking transfer drive to implement.
Further, in step S2, low permeability oil field block decline trend meets hyperbolic decline mode, in hyperbolic decline,
Yield and production time meet following formula:
Wherein, Q0There is yield corresponding to decline trend for first, n is decline exponent, D0For lapse rate, yield
Under conditions of determination, n and D0Usually constant, t are the time.
Further, production forecast formula is as follows:
Q=Q0/(1+(n·D0)·t)^(1/n)。
Further, the decline exponent n value of fitting is between 0~1.
Further, step S3 specifically: the area for calculating oil increment, when practical daily oil production curve is higher than prediction daily output
When oily situation, the difference of of that month actual average daily oil production and prediction daily average oil production is oil increment multiplied by producing days,
Cumulative is accumulative oil increment.
Further, if practical oil production prediction oil production curve hereinafter, if curve area below not as increasing
Oil mass.
Compared with prior art, the present invention at least has the advantages that
A kind of low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method of the present invention, using to polymer
The decline trend that microballoon transfer drive implements region carries out the prediction of successively decreasing after transfer drive, objective can react and not implement microballoon transfer drive situation
Under production history, then by the comparison of forecast production and actual production, and then evaluate polymer microballoon transfer drive and implement effect
Fruit, this evaluation method consider the actual conditions and production decline law of oil field development, the intuitive reactive measures effect of energy, the increasing of calculating
Oil mass data are with more scientific and authenticity.
Further, 6 months numbers should be fitted so as far as possible at 6 months or more by collecting oil production data before transfer drive is implemented
According to more being matched with the practical situation of successively decreasing of oil reservoir.
Further, creation data before measure is fitted by hyperbolic decline formula, is that one kind meets oil field development
Practical, more accurate data processing method, first is that can the more reasonable creation data to before measure be fitted, second is that
Creation data after measure can be extended by curve and carry out more accurate prediction, carried out with this with actual production data pair
Than.
Further, for the decline exponent n value of fitting between 0~1, the curve matching degree of correlation should reach 90% or more, with
Guarantee the authenticity and validity of fitting.
Further, daily oil production can preferably react and not implement transfer drive feelings after the measure that fitting obtains of successively decreasing
The creation data situation in oil field under condition, then compared with actual production data, difference is taken, implementation can be accurately reacted
Transfer drive is more in line with oil reservoir development reality with the oil increasing effect in the case of transfer drive, this algorithm is not implemented.
In conclusion after the present invention more can intuitively react transfer drive measure implementation, practical daily oil production and prediction day
The relationship of oil production, and then objectively evaluate the effect after transfer drive measure.Meanwhile the oil increment calculated in this way more accords with
The production decline law of oil field development is closed, data are with more persuasion property.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is certain practical oil production curve graph in block transfer drive measure front and back in present example；
Fig. 2 is practical daily oil production after certain block transfer drive measure in present example and prediction daily oil production curve graph.
Specific embodiment
The invention discloses a kind of low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation methods, draw first
Polymer microballoon transfer drive processed implements the practical day oil-producing curve in region；Then double to oil-producing data progress before region transfer drive is implemented is implemented
Song fitting, oil production is predicted after being implemented by matched curve to transfer drive；Compare transfer drive implement after practical daily oil production in advance
The relationship of daily oil production is surveyed, and then calculates oil increment, evaluates implementation result.The present invention consider oil field development actual conditions and
Production decline law intuitively reactive measures effect, the oil increment data of calculating can have more scientific and authenticity.
A kind of low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method of the present invention, including following step
It is rapid:
S1, monthly output data before certain block implementation polymer microballoon transfer drive are collected, draws production curve, it is subsequent to guarantee
The validity of effect assessment, monthly output data are no less than 6 months before taking transfer drive to implement；
S2, according to the yield of drafting-production month curve, hyperbolic fitting is carried out to oil production before transfer drive, and to transfer drive after
Oil production is predicted；
Wherein, Q0There is yield corresponding to decline trend for first, n is decline exponent, D0For lapse rate, yield
Under conditions of determination, n and D0Usually constant, t are the time.
By above formula it is found thatIt is in linear relation with time t, therefore, this two item data is individually fitted to
Straight line, slope are nD0, by the examination generation to n value, when degree of fitting reaches highest, n value is reasonable value, simultaneously
It can determine D by straight slope value0。
After the above parameters determines, formula is deformed, it is as follows to obtain following production forecast formula:
Q=Q0/(1+(n·D0)·t)^(1/n)
Yield can be thus fitted before the implementing measure of oil field, the oil production after prediction measure implementation, then with
Practical oil production compares, and then evaluation measures effect.
S3, area after transfer drive among actual production curve and matched curve, increased yield as after transfer drive are calculated.
The area for calculating oil increment should be the area that practical oil production is greater than prediction oil production, if practical oil production exists
Predict that oil production curve hereinafter, so curve area below should deduct, cannot can be regarded as oil increment.
When practical daily oil production curve is higher than prediction day oil-producing situation, of that month actual average daily oil production and pre- can be used
The difference of survey daily average oil production is oil increment multiplied by producing days, and it is that accumulative increasing is oily that monthly oil increment, which according to said method adds up,
Amount；When practical daily oil production is lower than prediction daily oil production, show that transfer drive does not have effect, no longer calculating oil increment.
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 embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
The component for applying example can be arranged and be designed by a variety of different configurations.Therefore, below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of of the invention selected
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1: certain extra permeability oilfield block comes into effect polymer microballoon transfer drive, creation data in December, 2017
It is shown in Table 1, according to evaluation method of the present invention, draws 7 months monthly production curves before transfer drive, and carry out data fitting, predicts transfer drive
Oil production afterwards, and compared with practical oil production, calculate the oil increment after transfer drive is implemented.
Certain the low permeability oil field block creation data of table 1
S1, such as Fig. 1 draw daily oil production-days relation curve according to block creation data.
In curve, abscissa represents the block production year month, and ordinate represents block monthly daily average oil production, with block reality
Border yield is foundation, depicts the monthly daily oil production curve in the block in April, 2017 in June, 2018, it can be seen that transfer drive
Daily oil production data change with time the decline curve of an approximate relative smooth before implementing.
S2, referring to Fig. 2, according to hyperbolic decline mode, day oil-producing curve practical before transfer drive is fitted, and to transfer drive
Day oil-producing is predicted afterwards.
Data processing was carried out to 7 months before transfer drive creation datas, so that the degree of correlation is reached 90% or more, obtains decline exponent
N=0.01, lapse rate D0=0.0128, it brings the above parameter into production forecast curve, in April, 2017 can be drawn out to 2017
The matched curve in October in year；It has drawn before transfer drive measure after matched curve, data extension is carried out to curve, extends to effect analysis
Required production month, i.e. in June, 2018.
S3, calculate transfer drive after, practical day oil-producing and prediction day oil-producing curve between area, obtain the block implement transfer drive after
Accumulative oil increment is 1001t.
Above method has carried out good fitting to the creation data before transfer drive, to the creation data after transfer drive carried out compared with
Accurately to predict, the more reasonable Developing status for reflecting transfer drive front and back oil field can also embody creation data after transfer drive
Variation and performance oil increasing effect, the oil increment calculation method of this combination production curve is compared with Traditional calculating methods, more
Intuitively and effectively to reflect measure to the influence of oil field development.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (8)
1. a kind of low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method, which is characterized in that draw polymerization
Object microballoon transfer drive implements the practical day oil-producing curve in region；It is adjusted using the decline trend for implementing region to polymer microballoon transfer drive
Prediction of successively decreasing after drive；The relationship for comparing practical daily oil production and prediction daily oil production after transfer drive is implemented calculates oil increment and comments
Valence implementation result.
2. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 1, special
Sign is, comprising the following steps:
S1, it collects block and implements monthly output data before polymer microballoon transfer drive, draw yield-production month curve；
S2, according to step S1 draw yield-production month curve, to implement region transfer drive implement before oil-producing data carry out hyperbolic
Fitting, oil production is predicted after being implemented by matched curve to transfer drive；
The relationship of practical daily oil production and prediction daily oil production, calculates actual production curve after transfer drive after S3, comparison transfer drive are implemented
With the area among matched curve, increased yield after transfer drive is obtained.
3. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 2, special
Sign is, in step S1, monthly output data are no less than 6 months before taking transfer drive to implement.
4. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 1, special
Sign is, in step S2, low permeability oil field block decline trend meets hyperbolic decline mode, in hyperbolic decline, yield and production
Time meets following formula:
Wherein, Q0There is yield corresponding to decline trend for first, n is decline exponent, D0For lapse rate, had determined that in yield
Under conditions of, n and D0Usually constant, t are the time.
5. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 4, special
Sign is that production forecast formula is as follows:
Q=Q0/(1+(n·D0)·t)^(1/n)。
6. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 5, special
Sign is that the decline exponent n value of fitting is between 0~1.
7. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 1, special
Sign is, step S3 specifically: the area for calculating oil increment, when practical daily oil production curve is higher than prediction day oil-producing situation,
Of that month actual average daily oil production and the difference of prediction daily average oil production multiplied by producing days are oil increment, and it is tired for adding up
Count oil increment.
8. low-permeability oil deposit polymer microballoon deep profile correction technology oil increment evaluation method according to claim 7, special
Sign is, if practical oil production in prediction oil production curve hereinafter, if curve area below not as oil increment.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111915171A (en) * | 2020-07-21 | 2020-11-10 | 中国石油大学(华东) | Comprehensive evaluation method for deep plugging and adjusting effect |
| CN112267860A (en) * | 2020-11-09 | 2021-01-26 | 中国石油天然气股份有限公司 | Low-permeability reservoir periodic water injection effect evaluation method |
| CN113222204A (en) * | 2020-02-06 | 2021-08-06 | 中国石油天然气股份有限公司 | Method, device, equipment and storage medium for predicting yield of stable production well of fracture-cavity oil reservoir |
| CN115773090A (en) * | 2021-09-08 | 2023-03-10 | 中国石油天然气股份有限公司 | Method for obtaining oil increment in tertiary oil recovery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113222204A (en) * | 2020-02-06 | 2021-08-06 | 中国石油天然气股份有限公司 | Method, device, equipment and storage medium for predicting yield of stable production well of fracture-cavity oil reservoir |
| CN113222204B (en) * | 2020-02-06 | 2024-03-05 | 中国石油天然气股份有限公司 | Fracture-cavity type oil reservoir stable production well yield prediction method, device, equipment and storage medium |
| CN111915171A (en) * | 2020-07-21 | 2020-11-10 | 中国石油大学(华东) | Comprehensive evaluation method for deep plugging and adjusting effect |
| CN111915171B (en) * | 2020-07-21 | 2024-02-13 | 中国石油大学(华东) | Comprehensive evaluation method for depth plugging effect |
| CN112267860A (en) * | 2020-11-09 | 2021-01-26 | 中国石油天然气股份有限公司 | Low-permeability reservoir periodic water injection effect evaluation method |
| CN115773090A (en) * | 2021-09-08 | 2023-03-10 | 中国石油天然气股份有限公司 | Method for obtaining oil increment in tertiary oil recovery |
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Application publication date: 20190531 |