CN110469299A - A kind of exploitation of oil-extracting well water injection takes effect effect evaluation method - Google Patents
A kind of exploitation of oil-extracting well water injection takes effect effect evaluation method Download PDFInfo
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Abstract
The invention belongs to oil field development technical fields, and in particular to a kind of exploitation of oil-extracting well water injection takes effect effect evaluation method, introduces take effect lapse rate and two parameters of coefficient that take effect, content includes: to collect Production Wells data；Determine target producing well, need quantify take effect effect production time node and the timing node under actual production yield；Selection standard well；Calculate nominal decline rate；Target producing well is calculated to take effect theoretical yield；Target producing well is calculated to take effect coefficient.The method overcome the qualitative judgements that it is good or bad that conventional method is only capable of carrying out taking effect to single producing well, the defect of the further degree evaluation that takes effect can not be carried out to entire oil reservoir, it can be laid the foundation with the effect that takes effect of individual well and oil reservoir entirety in rapid qualitative difference production period for the research of further oil reservoir.
Description
Technical field
The invention belongs to oil field development technical fields, and in particular to a kind of exploitation of oil-extracting well water injection takes effect effect assessment side
Method.
Background technique
Waterflooding extraction is a kind of widely used one of the method for improving oil reservoir ultimate recovery of oil field development.Water injection well note
After water, strata pressure improves and constantly along grain direction to producing well propagation, and after pressure conduction is to producing well, producing well starts
It takes effect, realizes the raising of development effectiveness.With Water injected reservoir develop further precision management, need to carry out development effectiveness into
The evaluation of one step.
Usually other than it development index can be used integrally to measure oil reservoir, also require to carry out the waterflooding effect of oil reservoir
Evaluation, but in fact, due to oil reservoir heterogeneity, the waterflooding effect of each plane domain is different.This is just needed
It is refine to individual well, the effect that takes effect of every mouth producing well is evaluated, to determine the waterflooding effect in Different Plane region, thus
Formulate reasonable, targeted development of injection-production policy.Currently, judging that the method that producing well takes effect has the judgement of production curve form
Method, using the value-added approach of hundred meters of tired oil-producings.
Wherein most widely used to produce tracing pattern judgment method, main thought is that oil well output rises or puts down
Surely, production curve morphologic appearance is that perhaps linear rise formation pressure rises or steadily, aqueous holding is steady for linear type, " U " type
It is fixed, that is, think that the well takes effect.But this method has the following deficiencies: first is that taking effect to be qualitative for this method identification, not energetic；
Second is that this method speed is slower, requires a great deal of time and observe the production curve of every mouth oil well, and need exclude because
Element is more；Third is that the degree evaluation that takes effect cannot integrally be carried out to oil reservoir.
Summary of the invention
The purpose of the present invention is to provide a kind of oil-extracting well water injections to develop the effect evaluation method that takes effect, and the prior art is overcome to deposit
Above-mentioned technical problem, with the effect that takes effect of the producing well of the quantization waterflooding extraction of creation data accurate quick.
For this purpose, technical solution provided by the invention is as follows:
A kind of exploitation of oil-extracting well water injection takes effect effect evaluation method, comprising the following steps:
Step 1) collects the moon creation data of producing well all in oil reservoir, obtains daily oil production；
Step 2) determines that target producing well needs to quantify the production time node M of effect of taking effect0And production time node
M0Under practical daily oil production Qn；
Step 3) selection standard well；
The initial stage daily oil production Q of step 4) calculating standard well0t；
Step 5) is according to the initial stage daily oil production Q of standard well0tWith standard well in the production time for needing to quantify to take effect effect
Node M0Under day oil-producing Q0, calculate the lapse rate D that takes effect of standard well0；
The initial stage daily oil production Q of step 6) calculating target producing wellnt；
Step 7) is according to the lapse rate D that takes effect of standard well0, target producing well initial stage daily oil production Qnt, calculate target and adopt
Oil well needs to quantify the production time node M of effect of taking effect0The theoretical daily output Q ' that takes effectn；
Step 8) is according to the theoretical daily output Q ' that takes effectnWith target producing well in production time node M0Under practical day oil-producing
Measure Qn, calculate target producing well and need to quantify the production time node M of effect of taking effect0The coefficient η that takes effectn；
Step 9) is developed the effect that takes effect to target oil-extracting well water injection and is evaluated, and following three classes are divided into:
ηn≤ 0.2 is classified as I class, 0.2 < ηn≤ 0.4 is classified as II class, and I class and II class are to take effect；0.4 < ηn≤ 1 is classified as loseing
Effect.
The moon creation data of producing well described in step 1) has been all months creation datas since operation.
Target producing well needs to quantify the production time node M of effect of taking effect in step 2)0Not less than 6 months.
Standard well described in step 3) is that productive life is greater than 3 years, production process zero defects, has 3 years and with overlying strata
The producing well that takes effect of pressure test data, and in M0In a month, standard well effective response for water flood always, while to exclude other non-notes
The yield effect that water takes effect.
The initial stage daily oil production Q of standard well described in step 4)0tCalculation formula is as follows:
In formula, q01、q02、q03The daily output for the first trimester that respectively yield arranges from high to low in standard well operation half a year
Individual well day oil-producing.
The lapse rate that takes effect described in step 5) D0Calculation formula is as follows:
The initial stage daily oil production Q of target producing well described in step 6)ntCalculation formula is as follows:
In formula, q1、q2、q3The day for the first trimester that respectively yield arranges from high to low in target producing well operation half a year
Produce individual well day oil-producing.
Take effect theoretical daily output Q ' described in step 7)nCalculation formula is as follows:
Q′n=Qnt×D0×(M0-6)。
Take effect coefficient η described in step 8)nCalculation formula is as follows:
Judgment criteria well takes effect the following conditions to be met:
(1) continuous 3 years strata pressures rising or steady；
(2) yield rising or stable yield in production process；
(3) the recovered water saliferous of oil well is between injection water and water flooding.
The beneficial effects of the present invention are:
This oil-extracting well water injection exploitation provided by the invention takes effect effect evaluation method, introduces to take effect and lapse rate and take effect
Two parameters of coefficient overcome conventional method and are only capable of carrying out taking effect to single producing well good or bad qualitative judgement, can not
The defect that the further degree evaluation that takes effect is carried out to entire oil reservoir, can be with individual well and oil reservoir in rapid qualitative difference production period
The whole effect that takes effect lays the foundation for the research of further oil reservoir.
For above content of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly, and in conjunction with attached drawing, make detailed
It is described as follows.
Detailed description of the invention
Fig. 1 is that I class takes effect well A production curve；
Fig. 2 is that II class takes effect well B production curve；
Fig. 3 is ineffective well C production curve.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this specification
Revealed content is understood other advantages and efficacy of the present invention easily.
Description introduces exemplary embodiments of the present invention, however, the present invention can use many different forms
Implement, and be not limited to the embodiment described herein, providing these embodiments is at large and fully disclose this
Invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.For the example being illustrated in the accompanying drawings
Term in property embodiment is not limitation of the invention.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Embodiment 1:
A kind of exploitation of oil-extracting well water injection is present embodiments provided to take effect effect evaluation method, comprising the following steps:
Step 1) collects the moon creation data of producing well all in oil reservoir, obtains daily oil production；
Step 2) determines that target producing well needs to quantify the production time node M of effect of taking effect0And production time node
M0Under practical daily oil production Qn；
Step 3) selection standard well；
The initial stage daily oil production Q of step 4) calculating standard well0t；
Step 5) is according to the initial stage daily oil production Q of standard well0tWith standard well in the production time for needing to quantify to take effect effect
Node M0Under day oil-producing Q0, calculate the lapse rate D that takes effect of standard well0；
The initial stage daily oil production Q of step 6) calculating target producing wellnt；
Step 7) is according to the lapse rate D that takes effect of standard well0, target producing well initial stage daily oil production Qnt, calculate target and adopt
Oil well needs to quantify the production time node M of effect of taking effect0The theoretical daily output Q ' that takes effectn；
Step 8) is according to the theoretical daily output Q ' that takes effectnWith target producing well in production time node M0Under practical day oil-producing
Measure Qn, calculate target producing well and need to quantify the production time node M of effect of taking effect0The coefficient η that takes effectn；
Step 9) is developed the effect that takes effect to target oil-extracting well water injection and is evaluated, and following three classes are divided into:
ηn≤ 0.2 is classified as I class, 0.2 < ηn≤ 0.4 is classified as II class, and I class and II class are to take effect；0.4 < ηn≤ 1 is classified as loseing
Effect.
This oil-extracting well water injection provided by the invention develops the effect evaluation method that takes effect, and overcomes conventional method and is only capable of to list
One producing well carries out the good or bad qualitative judgement that takes effect, and can not carry out the degree evaluation that further takes effect to entire oil reservoir
Defect can be established with the effect that takes effect of individual well and oil reservoir entirety in rapid qualitative difference production period for the research of further oil reservoir
Fixed basis.
Embodiment 2:
A kind of exploitation of oil-extracting well water injection is present embodiments provided to take effect effect evaluation method, comprising the following steps:
Step 1) collects the moon creation data of producing well all in oil reservoir, obtains daily oil production；The moon of the producing well
Creation data has been all months creation datas since operation；
Step 2) determines that target producing well needs to quantify the production time node M of effect of taking effect0And production time node
M0Under practical daily oil production Qn；Wherein, target producing well needs to quantify the production time node M of effect of taking effect0Not less than 6
Month；
For example, it is desired to quantify the effect that takes effect that producing well A produces the moon at the 24th, M0Value is 24, actual production Qn。
Step 3) selection standard well；Standard well is that productive life is greater than 3 years, production process zero defects, has 3 years or more
The producing well that takes effect of formation pressure test data, and in M0In a month, standard well effective response for water flood always, while to exclude other
The yield effect of non-effective response for water flood；
Wherein, judgment criteria well takes effect the following conditions to be met:
(1) continuous 3 years strata pressures rising or steady；
(2) yield rising or stable yield in production process；
(3) the recovered water saliferous of oil well is between injection water and water flooding；
After standard well determines, by the quantization for the effect that carries out taking effect based on the well.It is required that in M0A month production time
It is interior, standard well effective response for water flood always, and to exclude the yield effect of other non-effective response for water flood.For example, it is desired to quantify producing well A
The effect that takes effect that the moon is produced at the 24th then requires standard well effective response for water flood always in 24 production moons, and to exclude other
The yield effect of non-effective response for water flood.
The initial stage daily oil production Q of step 4) calculating standard well0t；
The initial stage daily oil production Q of standard well0tCalculation formula is as follows:
In formula, q01、q02、q03Respectively yield is arranged from high to low in standard well operation half a year
The daily output individual well day oil-producing of the first trimester of column.
Step 5) is according to the initial stage daily oil production Q of standard well0tWith standard well in the production time for needing to quantify to take effect effect
Node M0Under day oil-producing Q0, calculate the lapse rate D that takes effect of standard well0；
The lapse rate that takes effect D0Calculation formula is as follows:
The initial stage daily oil production Q of step 6) calculating target producing wellnt；
The initial stage daily oil production Q of target producing wellntCalculation formula is as follows:
In formula, q1、q2、q3The day for the first trimester that respectively yield arranges from high to low in target producing well operation half a year
Produce individual well day oil-producing；
Step 7) is according to the lapse rate D that takes effect of standard well0, target producing well initial stage daily oil production Qnt, calculate target and adopt
Oil well needs to quantify the production time node M of effect of taking effect0The theoretical daily output Q ' that takes effectn；
Take effect theoretical daily output Q 'nCalculation formula is as follows:
Q′n=Qnt×D0×(M0-6)；
Step 8) is according to the theoretical daily output Q ' that takes effectnWith target producing well in production time node M0Under practical day oil-producing
Measure Qn, calculate target producing well and need to quantify the production time node M of effect of taking effect0The coefficient η that takes effectn；
Take effect coefficient ηnCalculation formula is as follows:
Step 9) is developed the effect that takes effect to target oil-extracting well water injection and is evaluated, and following three classes are divided into:
ηn≤ 0.2 is classified as I class, 0.2 < ηn≤ 0.4 is classified as II class, and I class and II class are to take effect；0.4 < ηn≤ 1 is classified as loseing
Effect.
This method is suitable for the directional well and horizontal well of waterflooding extraction.
Embodiment 3:
Certain waterflooding reservoir is chosen, on the basis of embodiment 2, the present embodiment quantifies to recover the oil in oil reservoir in the method
The effect that takes effect of well (horizontal well).
Step 1: collecting the moon creation data (day oil production level) of the oil reservoir；
Step 2: determining the production time node M of target level well A, the effect that needs to quantify to take effect0=24 and this when segmentum intercalaris
Actual production production Q under pointn=6.19t/d；
Step 3: by collecting the dynamic monitoring information of oil reservoir well, the production curve of each producing well of observation, selecting GP0 is mark
Quasi- well；
Step 4: the initial production of GP0 is calculated, is extracted by data, q01=8.37t/d, q02=8.22t/d, q03=
7.77t/d calculates Q0t=8.12t/d；
Step 5: calculating the lapse rate D that takes effect0, extracted by data, standard well produces the day oil-producing Q that the moon is 240=5.34t/
D calculates D0=0.019；
Step 6: calculating the initial production Q of producing well Ant, extracted by data, q1=11.00t/d, q2=11.00t/d,
q3=10.99t/d, calculates Qnt=10.99t/d；
Step 7: calculating the theoretical yield Q ' that takes effect that producing well A produces the moon at the 24thn, calculate Q 'n=7.03t/d；
Step 8: calculating the coefficient η that takes effect that producing well A produces the moon at the 24thn, calculate ηn=0.12；
Step 9: according to quantitative assessment as a result, producing well A is classified as I class.Producing well A production curve is as shown in Figure 1.
Embodiment 4:
Certain waterflooding reservoir is taken, quantifies the effect that takes effect of producing well in oil reservoir in the method.
Step 1: collecting the moon creation data (day oil production level) of the oil reservoir；
Step 2: determining the production time node M of target level well B, the effect that needs to quantify to take effect0=24 and this when segmentum intercalaris
Actual production production Q under pointn=5.26t/d；
Step 3: by collecting the dynamic monitoring information of oil reservoir well, the production curve of each producing well of observation, selecting GP0 is mark
Quasi- well；
Step 4: the initial production of GP0 is calculated, is extracted by data, q01=8.37t/d, q02=8.22t/d, q03=
7.77t/d calculates Q0t=8.12t/d；
Step 5: calculating the lapse rate D that takes effect0, extracted by data, standard well produces the day oil-producing Q that the moon is 240=5.34t/
D calculates D0=0.019；
Step 6: calculating the initial production Q of producing well Bnt, extracted by data, q1=15.56t/d, q2=9.65t/d, q3
=9.48t/d, calculates Qnt=11.56t/d；
Step 7: calculating the theoretical yield Q ' that takes effect that producing well B produces the moon at the 24thn, calculate Q 'n=7.58t/d；
Step 8: calculating the coefficient η that takes effect that producing well B produces the moon at the 24thn, calculate ηn=0.31；
Step 9: according to quantitative assessment as a result, horizontal well B is classified as II class.Producing well B production curve is as shown in Figure 2.
Embodiment 5:
Certain waterflooding reservoir is chosen, quantifies the effect that takes effect of producing well in oil reservoir in the method.
Step 1: collecting the moon creation data (day oil production level) of the oil reservoir；
Step 2: determining that target level well C needs to quantify the production time node M of effect of taking effect0=24 and the timing node
Under actual production production Qn=2.87t/d；
Step 3: by collecting the dynamic monitoring information of oil reservoir well, the production curve of each producing well of observation, selecting GP0 is mark
Quasi- well；
Step 4: the initial production of GP0 is calculated, is extracted by data, q01=8.37t/d, q02=8.22t/d, q03=
7.77t/d calculates Q0t=8.12t/d；
Step 5: calculating the lapse rate D that takes effect0, extracted by data, standard well produces the day oil-producing Q that the moon is 240=5.34t/
D calculates D0=0.019；
Step 6: calculating the initial production Q of producing well Cnt, extracted by data, q1=10.45t/d, q2=10.31t/d,
q3=10.21t/d, calculates Qnt=10.32t/d；
Step 7: calculating the theoretical yield Q ' that takes effect that producing well C produces the moon at the 24thn, calculate Q 'n=6.79t/d；
Step 8: calculating the coefficient η that takes effect that producing well C produces the moon at the 24thn, calculate ηn=0.58；
Step 9: according to quantitative assessment as a result, horizontal well C is classified as ineffective.Producing well C production curve is as shown in Figure 3.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
- The effect evaluation method 1. a kind of oil-extracting well water injection exploitation takes effect, which comprises the following steps:Step 1) collects the moon creation data of producing well all in oil reservoir, obtains daily oil production；Step 2) determines that target producing well needs to quantify the production time node M of effect of taking effect0And production time node M0Under Practical daily oil production Qn；Step 3) selection standard well；The initial stage daily oil production Q of step 4) calculating standard well0t；Step 5) is according to the initial stage daily oil production Q of standard well0tWith standard well in the production time node of effect that needs to quantify to take effect M0Under day oil-producing Q0, calculate the lapse rate D that takes effect of standard well0；The initial stage daily oil production Q of step 6) calculating target producing wellnt；Step 7) is according to the lapse rate D that takes effect of standard well0, target producing well initial stage daily oil production Qnt, calculate target producing well It needs to quantify the production time node M of effect of taking effect0The theoretical daily output Q ' that takes effectn；Step 8) is according to the theoretical daily output Q ' that takes effectnWith target producing well in production time node M0Under practical daily oil production Qn, Target producing well is calculated to need to quantify the production time node M of effect of taking effect0The coefficient η that takes effectn；Step 9) is developed the effect that takes effect to target oil-extracting well water injection and is evaluated, and following three classes are divided into:ηn≤ 0.2 is classified as I class, 0.2 < ηn≤ 0.4 is classified as II class, and I class and II class are to take effect；0.4 < ηn≤ 1 be classified as it is ineffective.
- The effect evaluation method 2. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, it is characterised in that: step 1) Described in the moon creation data of producing well be all months creation datas since operation.
- The effect evaluation method 3. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, it is characterised in that: step 2) Middle target producing well needs to quantify to take effect the production time node M of effect0Not less than 6 months.
- The effect evaluation method 4. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 3) Described in standard well be that productive life is greater than 3 years, production process zero defects, has 3 years and above formation pressure test data Take effect producing well, and in M0In a month, standard well effective response for water flood always, while to exclude the yield shadow of other non-effective response for water flood It rings.
- The effect evaluation method 5. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 4) Described in standard well initial stage daily oil production Q0tCalculation formula is as follows:In formula, q01、q02、q03The daily output individual well for the first trimester that respectively yield arranges from high to low in standard well operation half a year Day oil-producing.
- The effect evaluation method 6. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 5) Described in take effect lapse rate D0Calculation formula is as follows:
- The effect evaluation method 7. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 6) Described in target producing well initial stage daily oil production QntCalculation formula is as follows:In formula, q1、q2、q3The daily output list for the first trimester that respectively yield arranges from high to low in target producing well operation half a year Well day oil-producing.
- The effect evaluation method 8. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 7) Described in take effect theoretical daily output Q 'nCalculation formula is as follows:Q′n=Qnt×D0×(M0-6)。
- The effect evaluation method 9. a kind of oil-extracting well water injection exploitation according to claim 1 takes effect, which is characterized in that step 8) Described in take effect coefficient ηnCalculation formula is as follows:
- The effect evaluation method 10. a kind of oil-extracting well water injection exploitation according to claim 4 takes effect, it is characterised in that: judgement Standard well takes effect the following conditions to be met:(1) continuous 3 years strata pressures rising or steady；(2) yield rising or stable yield in production process；(3) the recovered water saliferous of oil well is between injection water and water flooding.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810118A (en) * | 2020-07-06 | 2020-10-23 | 中国海洋石油集团有限公司 | Method for rapidly and quantitatively evaluating improved development effect of oil well extract |
| 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 |
| CN111997596A (en) * | 2020-08-14 | 2020-11-27 | 中国石油天然气股份有限公司 | Water absorption effect evaluation method of water injection well and application |
| CN112228051A (en) * | 2020-10-23 | 2021-01-15 | 中国石油天然气股份有限公司 | Evaluation method for injection and production wells in same well |
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