CN106055843B - A kind of poly- drive produces the quantitative analysis method and device of poly- curve in the process - Google Patents
A kind of poly- drive produces the quantitative analysis method and device of poly- curve in the process Download PDFInfo
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- CN106055843B CN106055843B CN201610515517.3A CN201610515517A CN106055843B CN 106055843 B CN106055843 B CN 106055843B CN 201610515517 A CN201610515517 A CN 201610515517A CN 106055843 B CN106055843 B CN 106055843B
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Abstract
The present invention relates to the quantitative analysis method and devices that poly- curve is produced during a kind of poly- drive, wherein, method includes: to count the relationship of different produced liquid in oil well polymer concentrations and monitoring time, obtains and produces poly- curve, and is classified according to curvilinear characteristic to the poly- curve of production；Establish polymer concentration interpretation model when not considering to alter poly- channel；The polymer concentration interpretation model considered when altering poly- channel is established using polymer concentration interpretation model when not considering to alter poly- channel；Detect the polymer concentration of producing well, poly- curve is produced to the polymer concentration fitting detected according to the polymer concentration interpretation model considered when altering poly- channel, and classified using the classification results for producing poly- curve to the poly- curve of the production fitted, polymer concentration interpretation model when altering poly- channel using the consideration analyzes the poly- curve of the production fitted.
Description
Technical field
The present invention relates to poly- curve interpretation technical field is produced, in particular to the quantization point of poly- curve is produced during a kind of poly- drive
Analyse method and device.
Background technique
For waterflooding oil field, oil reservoir is primary heterogeneous and long-period water drive is further exacerbated by heterogeneity, in oil reservoir
Hypertonic channel or macropore are gradually formed, water breakthrough channel is formed between oil-water well, seriously affects reservoir water drive development effectiveness.Therefore,
Effective water and oil control is current main trend.
Polymer flooding is common tertiary oil recovery method, under proper condition, can significantly play decreasing water cut and increasing oil effect,
But individual well takes effect in Polymer flooding block, sees that poly- degree difference is larger, sees that poly- rule is different, this is because reservoir property, part seep
Saturating rate, the oily many factors such as saturation degree and injection-production relation influence.
Summary of the invention
To solve problem of the prior art, the present invention propose a kind of quantitative analysis method that poly- curve is produced during poly- drive and
Device produces poly- curvilinear characteristic and explains difficulty during driving so that solution is poly-, fluid-channeling channel and fluid parameter are difficult to only produce by analysis
Poly- feature can quantitatively characterizing the problem of.
To achieve the above object, the present invention provides a kind of quantitative analysis methods that poly- curve is produced during poly- drive, comprising:
The relationship of different produced liquid in oil well polymer concentrations and monitoring time is counted, obtains and produces poly- curve, and according to curve
Feature classifies to the poly- curve of production；
Establish polymer concentration interpretation model when not considering to alter poly- channel；
It is established using polymer concentration interpretation model when not considering to alter poly- channel and considers that polymer when altering poly- channel is dense
Spend interpretation model；
The polymer concentration for detecting producing well, according to the polymer concentration interpretation model considered when altering poly- channel to detecting
Polymer concentration fitting produce poly- curve, and the poly- curve of the production fitted is carried out using the classification results for producing poly- curve
Classification, polymer concentration interpretation model when altering poly- channel using the consideration analyze the poly- curve of the production fitted.
Preferably, the step of the considering polymer concentration interpretation model when altering poly- channel of establishing includes:
Determine the non-extension rate expression formula for altering water relative polymer concentrations in poly- channel；
Polymer concentration interpretation model when not considering to alter poly- channel is multiplied with the extension rate, acquisition considers to alter poly-
Polymer concentration interpretation model when channel.
Preferably, the extension rate expression formula are as follows:
In formula, α indicates the extension rate of polymer concentration；Tk expression alters poly- channel permeability rate and advances by leaps and bounds coefficient；B expression is altered poly-
Channel accounts for formation thickness ratio；μpIndicate polymer solution viscosity, unit mPas；μwIndicate aqueous viscosity, unit is
mPa·s。
Preferably, the expression formula for considering polymer concentration interpretation model when altering poly- channel are as follows:
In formula,D is diffusion coefficient；C
For polymer concentration, unit mg/L；U is polymer percolation flow velocity, unit m/d；φ is porosity；φfTo flow hole
Degree；SoFor oil saturation；SwcFor irreducible water saturation；A is adsorption coefficient；ρrFor rock density, unit g/cm3；T is to survey
Try time, unit d；The extension rate of α expression polymer concentration；Δ t is polymer slug injection length.
To achieve the above object, the present invention also provides the quantitative analysis device that poly- curve is produced during a kind of poly- drive, packets
It includes:
Taxon obtains for counting the relationship of different produced liquid in oil well polymer concentrations and monitoring time and produces poly- song
Line, and classified according to curvilinear characteristic to the poly- curve of production；
First polymer concentrations account model foundation unit, polymer concentration solution when not considering to alter poly- channel for establishing
Release model；
Second polymer concentrations account model foundation unit is explained for the polymer concentration when not considering to alter poly- channel
On the basis of model, the polymer concentration interpretation model considered when altering poly- channel is established；
Interpretive analysis unit, for detecting the polymer concentration of producing well, polymer when altering poly- channel according to consideration is dense
Degree interpretation model produces poly- curve to the polymer concentration fitting detected, and using the classification results for producing poly- curve to quasi-
The poly- curve of the production closed out is classified, production of polymer concentration interpretation model when altering poly- channel using the consideration to fitting
Poly- curve is analyzed.
Preferably, the second polymer concentrations account model foundation unit includes:
Extension rate determining module, for determining the non-extension rate expression for altering water relative polymer concentrations in poly- channel
Formula；
Establish model module, for by when not considering to alter poly- channel polymer concentration interpretation model and the extension rate
It is multiplied, obtains the polymer concentration interpretation model considered when altering poly- channel.
Preferably, the extension rate expression formula that the extension rate determining module determines are as follows:
In formula, α indicates the extension rate of polymer concentration；Tk expression alters poly- channel permeability rate and advances by leaps and bounds coefficient；B expression is altered poly-
Channel accounts for formation thickness ratio；μpIndicate polymer solution viscosity, unit mPas；μwIndicate aqueous viscosity, unit is
mPa·s。
Preferably, the considerations of second polymer concentrations account model foundation unit is established alters polymer when poly- channel
The expression formula of concentrations account model are as follows:
In formula,D is diffusion coefficient；C
For polymer concentration, unit mg/L；U is polymer percolation flow velocity, unit m/d；φ is porosity；φfTo flow hole
Degree；SoFor oil saturation；SwcFor irreducible water saturation；A is adsorption coefficient；ρrFor rock density, unit g/cm3；T is to survey
Try time, unit d；The extension rate of α expression polymer concentration；Δ t is polymer slug injection length.
Above-mentioned technical proposal has the following beneficial effects:
The technical program gathers the relationship of output polymer concentration and time during driving from poly- curvilinear characteristic is produced, and leads to
It crosses and establishes polymer concentration interpretation model, fitting produces poly- curve, obtains the crucial ginseng such as fluid-channeling channel and Polymer adsorption, diffusion
Number can effectively instruct scene understanding oil reservoir, so that being achieved by producing poly- log inversion fluid-channeling channel key parameter, be formed
By altering poly- curve can quickly identify the quantitative analysis method of fluid-channeling channel, for understanding oil reservoir fluid-channeling channel feature and
Follow-up has stronger directive significance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the quantitative analysis method flow diagram that a kind of poly- drive proposed by the present invention produces poly- curve in the process；
Fig. 2 is that flatbed produces poly- curve synoptic diagram；
Fig. 3 is that faint type produces poly- curve synoptic diagram；
Fig. 4 is that ramp type produces poly- curve synoptic diagram；
Fig. 5 is the geological model schematic diagram simplified when considering to alter poly- channel；
Fig. 6 is one of the poly- curve synoptic diagram of production that the present embodiment fits；
Fig. 7 is the two of the poly- curve synoptic diagram of production that the present embodiment fits；
Fig. 8 is the three of the poly- curve synoptic diagram of production that the present embodiment fits；
Fig. 9 be different type produce that poly- curve interpretation obtains alter poly- channel thickness and the correlation of leaps and bounds coefficient is shown
It is intended to；
Figure 10 be different type produce that poly- curve interpretation obtains alter poly- channel thickness to alter the related of poly- channel thickness ratio
Property schematic diagram；
Figure 11 is the quantitative analysis device block diagram that a kind of poly- drive proposed by the present invention produces poly- curve in the process.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The working principle of the technical scheme is as follows: the technical program is produced from poly- curvilinear characteristic is produced according to during poly- drive
The relationship of amount of polymers and time out classifies to poly- curve is produced, establishes polymer concentration interpretation model, root on this basis
Poly- curve is produced according to the polymer concentration fitting detected, according to classification results, polymer is utilized to the poly- curve of the production fitted
Concentrations account model is parsed, and is quantitatively retouched to poly- channel, Polymer adsorption, polymer diffusion and seepage parameters are altered
It states, there is important theoretical and practical significance for understanding oil reservoir fluid-channeling channel feature and the subsequent corresponding regulating measures of guidance.
Based on above-mentioned working principle, the present invention proposes that a kind of poly- drive produces the quantitative analysis method of poly- curve, such as Fig. 1 in the process
It is shown.Include:
Step 101): counting the relationship of different produced liquid in oil well polymer concentrations and monitoring time, obtains and produces poly- curve, and
Classified according to curvilinear characteristic to the poly- curve of production；
In a step 101, poly- drive of statistics produces poly- concentration in the process, will produce poly- curve classification according to curve shape, specifically:
The polymer concentration of different produced liquid in oil well and the relationship of monitoring time are counted, abscissa is the production time, and ordinate is polymerization
Object concentration, then will produce poly- indicatrix by curvilinear characteristic and be divided into 3 classes: flatbed produces poly- curve, as shown in Figure 2；Faint type produces
Poly- curve, as shown in Figure 3；And ramp type produces poly- curve, as shown in Figure 4.
Step 102): polymer concentration interpretation model when not considering to alter poly- channel is established；
Step 102 is specifically divided into following 4 processes:
Process 1: establishing in the case of One-Dimensional flows, considers the polymer mass transfer diffusion background mathematics model of suction-operated, tool
Body are as follows:
In formula (1), D is diffusion coefficient；C is polymer concentration, mg/L；U is polymer percolation flow velocity, m/d；φ is hole
Degree；φfFor flowing porosity；SoFor oil saturation；SwcFor irreducible water saturation；A is adsorption coefficient；ρrFor rock density, g/
cm3；T is testing time, d.
Process 2: during injection of polymer, consider that polymer continuous-stable since the t=0 moment injects, one-dimensional feelings
Under condition, boundary condition and primary condition setting are as follows:
Process 3: polymer mass transfer spreads background mathematics model in the case of solving One-Dimensional flows using Laplace transformation.
One-dimensional Polymers mass transfer spreads background mathematics model conversation are as follows:
The boundary primary condition of one-dimensional Polymers mass transfer diffusion basic data model are as follows:
Process 4: mathematical model convert for the Laplace of time t', then solves and obtains the space Laplace solution
Afterwards, inverting is carried out using Laplace inverse transformation, obtains analytic solutions are as follows:
Section 2 is typically small compared to first item on the right of formula (5), oil-producing well polymer when being then continuously injected into polymer
Concentration are as follows:
For injection of polymer slug, from injecting timing is started, slug injection length is Δ t, then output polymer is dense
Degree variation expression formula are as follows:
In formula (7):
Step 103): it is established when considering to alter poly- channel using polymer concentration interpretation model when not considering to alter poly- channel
Polymer concentration interpretation model；
Step 103 specifically includes:
The geological model simplified when altering poly- channel is considered as shown in fig. 5, it is assumed that altering in poly- channel that polymer is dense in Z-direction
It spends identical, and thinks that polymer is migrated mainly along hypertonic channel, altering poly- channel thickness and accounting for formation thickness ratio is b, is altered poly- logical
Road leaps and bounds coefficient is Tk.
After above simplification, consider that the polymer output concentrations account result for altering poly- channel only needs to consider non-alter
The diluting effect of water relative polymer concentrations in poly- channel, extension rate expression formula are as follows:
In formula (9), α indicates the extension rate of polymer concentration；Tk expression alters poly- channel permeability rate and advances by leaps and bounds coefficient；B table
Show that altering poly- channel accounts for formation thickness ratio；μpIndicate polymer solution viscosity mPas；μwIndicate aqueous viscosity, mPas.
Utilize the available polymer output concentration expression formula of formula (9) are as follows:
Step 104): detecting the polymer concentration of producing well, explains mould according to the polymer concentration considered when altering poly- channel
Type produces poly- curve, and the production using the classification results for producing poly- curve to fitting to the polymer concentration fitting detected
Poly- curve is classified, using it is described consideration alter poly- channel when polymer concentration interpretation model to the poly- curve of the production fitted into
Row analysis.
Accordingly, it is based on above-mentioned working principle, the present invention also proposes that a kind of poly- drive produces the quantitative analysis of poly- curve in the process
Device, as shown in figure 11.Include:
Taxon a is obtained for counting the relationship of different produced liquid in oil well polymer concentrations and monitoring time and is produced poly- song
Line, and classified according to curvilinear characteristic to the poly- curve of production；
First polymer concentrations account model foundation unit b, for establishing polymer concentration when not considering to alter poly- channel
Interpretation model；
Second polymer concentrations account model foundation unit c, for utilizing polymer concentration when not considering to alter poly- channel
Interpretation model establishes the polymer concentration interpretation model considered when altering poly- channel；
Interpretive analysis unit d, for detecting the polymer concentration of producing well, polymer when altering poly- channel according to consideration is dense
Degree interpretation model produces poly- curve to the polymer concentration fitting detected, and using the classification results for producing poly- curve to quasi-
The poly- curve of the production closed out is classified, production of polymer concentration interpretation model when altering poly- channel using the consideration to fitting
Poly- curve is analyzed.
In order to which the technical program application effect has more intuitive understanding, now to be driven using certain Conglomerate Reservoir of the above method is poly-
Illustrate a specific embodiment of the invention for process.
Table 1 is the underlying parameter of 3 mouthfuls of typical oil-producing wells during the poly- drive of Conglomerate Reservoir that embodiment provides, remaining parameter
Are as follows: well spacing is all 125m, and water flooding viscosity is 0.6mPa.s, rock density 2.4g/cm3, porosity 0.18, flowing porosity
0.144, irreducible water saturation 0.35, current oil saturation 0.5:
Table 1
| Well-name | Polymer viscosity mPa.s | Averagely note adopts speed t/d in detection time | Individual well average moisture content | Perforation effective thickness m |
| A1 | 1294.64 | 13.6 | 0.882 | 4.25 |
| A2 | 1294.64 | 8.6 | 0.779 | 3.5 |
| A3 | 1311.43 | 6.6 | 0.624 | 1 |
The polymer concentration that producing well detects is fitted, Fig. 6, Fig. 7 and the poly- curve signal of production shown in Fig. 8 are obtained
Figure.
Table 2 is the key parameter about Polymer adsorption, diffusion and fluid-channeling channel that parsing obtains:
Table 2
| Well-name | Adsorption coefficient a | Diffusion coefficient D | Alter poly- channel thickness ratio b | Poly- channel permeability rate is altered to advance by leaps and bounds coefficient |
| A1 | 0.025 | 12 | 0.3 | 40 |
| A2 | 0.015 | 13 | 0.2 | 20 |
| A3 | 0.03 | 13 | 0.7 | 60 |
As can be seen from Table 2: flatbed alters that poly- curve is corresponding to alter poly- channel thickness ratio and leaps and bounds coefficient
It is medium, and ramp type alters that poly- curve is corresponding to alter poly- channel thickness ratio and leaps and bounds coefficient is relatively large.
In order to which the application effect of the technical program has more intuitive understanding, now with certain conglomerate oil by adopting the above technical scheme
It hides and illustrates a specific embodiment of the invention for poly- drive process.
Fig. 9 and Figure 10 is the fluid-channeling channel ginseng that the poly- poly- curve quantitative analysis of production for driving 121 wells time in trial zone is explained
Number and the correlation for altering poly- curve type.Wherein,
In Fig. 9, show that different type produced that poly- curve interpretation obtains alters poly- channel thickness and leaps and bounds coefficient
Correlation, as seen from the figure: produce poly- curve type and to alter poly- channel permeability rate Relativity of Coefficients of advancing by leaps and bounds preferable: advance by leaps and bounds coefficient great Yi
It forms ramp type and alters poly- rule, the coefficient little Yi that advances by leaps and bounds forms faint type and alters poly- curve.
In Figure 10, show that different type produces that poly- curve interpretation obtains alters poly- channel thickness and alters poly- channel thickness ratio
The correlation of example, as seen from the figure: producing poly- curve type and to alter poly- channel thickness ratio correlation also preferable: thickness proportion great Yi shape
Sloping type alters poly- rule, and thickness proportion little Yi forms faint type and alters poly- curve.
It will be apparent from the above that: flatbed produces poly- curve and mainly reflects that alter poly- channel develops relatively；It is main that faint type produces poly- curve
It is relatively weak that poly- developmental pathway is altered in reflection；Ramp type produces poly- curve and mainly reflects that alter poly- channel develops very much, subsequent waterflooding process
In, polymer concentration also declines quickly.
The technical program solve it is poly- during driving by the poly- curve quantitative analysis of production alter poly- channel and Polymer adsorption and
The key parameters such as diffusion, so that being achieved by parameter crucial during the poly- curve quantitative analysis polymer flooding of analysis production.
The above specific embodiment has carried out further specifically the purpose of the present invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (8)
1. producing the quantitative analysis method of poly- curve during a kind of poly- drive characterized by comprising
The relationship of different produced liquid in oil well polymer concentrations and monitoring time is counted, obtains and produces poly- curve, and according to curvilinear characteristic
Classify to the poly- curve of production；
Establish polymer concentration interpretation model when not considering to alter poly- channel；
The polymer concentration solution considered when altering poly- channel is established using polymer concentration interpretation model when not considering to alter poly- channel
Release model；
The polymer concentration for detecting producing well, it is poly- to what is detected according to the polymer concentration interpretation model considered when altering poly- channel
It closes the fitting of object concentration and produces poly- curve, and the poly- curve of the production fitted is divided using the classification results for producing poly- curve
Class, polymer concentration interpretation model when altering poly- channel using the consideration analyze the poly- curve of the production fitted.
2. the method as described in claim 1, which is characterized in that described establish considers that polymer concentration when altering poly- channel is explained
The step of model includes:
Determine the non-extension rate expression formula for altering water relative polymer concentrations in poly- channel；
Polymer concentration interpretation model when not considering to alter poly- channel is multiplied with the extension rate, obtains and considers to alter poly- channel
When polymer concentration interpretation model.
3. method according to claim 2, which is characterized in that the extension rate expression formula are as follows:
In formula, α indicates the extension rate of polymer concentration；Tk expression alters poly- channel permeability rate and advances by leaps and bounds coefficient；Poly- channel is altered in b expression
Account for formation thickness ratio；μpIndicate polymer solution viscosity；μwIndicate aqueous viscosity.
4. method as claimed in claim 2 or claim 3, which is characterized in that polymer concentration when poly- channel is altered in the consideration is explained
The expression formula of model are as follows:
In formula,D is diffusion coefficient；C is poly-
Close object concentration；U is polymer percolation flow velocity；φ is porosity；φfFor flowing porosity；SoFor oil saturation；SwcFor constraint
Water saturation；A is adsorption coefficient；ρrFor rock density；T is the testing time；The extension rate of α expression polymer concentration；Δ t is
Polymer slug injection length.
5. producing the quantitative analysis device of poly- curve during a kind of poly- drive characterized by comprising
Taxon obtains for counting the relationship of different produced liquid in oil well polymer concentrations and monitoring time and produces poly- curve, and
Classified according to curvilinear characteristic to the poly- curve of production；
First polymer concentrations account model foundation unit, polymer concentration when not considering to alter poly- channel for establishing explain mould
Type；
Second polymer concentrations account model foundation unit, for the polymer concentration interpretation model when not considering to alter poly- channel
On the basis of, establish the polymer concentration interpretation model considered when altering poly- channel；
Interpretive analysis unit, for detecting the polymer concentration of producing well, according to the polymer concentration solution considered when altering poly- channel
It releases model and poly- curve is produced to the polymer concentration fitting detected, and using the classification results for producing poly- curve to fitting
The poly- curve of production classify, the song poly- to the production fitted of polymer concentration interpretation model when altering poly- channel using the consideration
Line is analyzed.
6. device as claimed in claim 5, which is characterized in that the second polymer concentrations account model foundation unit packet
It includes:
Extension rate determining module, for determining the non-extension rate expression formula for altering water relative polymer concentrations in poly- channel；
Establish model module, for by when not considering to alter poly- channel polymer concentration interpretation model and the extension rate phase
Multiply, obtains the polymer concentration interpretation model considered when altering poly- channel.
7. device as claimed in claim 6, which is characterized in that the extension rate expression that the extension rate determining module determines
Formula are as follows:
In formula, α indicates the extension rate of polymer concentration；Tk expression alters poly- channel permeability rate and advances by leaps and bounds coefficient；Poly- channel is altered in b expression
Account for formation thickness ratio；μpIndicate polymer solution viscosity；μwIndicate aqueous viscosity.
8. device as claimed in claims 6 or 7, which is characterized in that the second polymer concentrations account model foundation unit
The expression formula of polymer concentration interpretation model when the considerations of establishing alters poly- channel are as follows:
In formula,D is diffusion coefficient；C is poly-
Close object concentration；U is polymer percolation flow velocity；φ is porosity；φfFor flowing porosity；SoFor oil saturation；SwcFor constraint
Water saturation；A is adsorption coefficient；ρrFor rock density；T is the testing time；The extension rate of α expression polymer concentration；Δ t is
Polymer slug injection length.
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| CN104564049A (en) * | 2015-01-22 | 2015-04-29 | 中国石油大学(华东) | Detection method of polymer flooding and gathering channel |
| CN104747149A (en) * | 2015-01-22 | 2015-07-01 | 中国石油大学(华东) | Detecting method of binary combined flooding agent migration channel |
| CN105715241A (en) * | 2016-01-15 | 2016-06-29 | 中国石油大学(华东) | Method for measuring polymer flooding relative permeability curve |
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| CN104564049A (en) * | 2015-01-22 | 2015-04-29 | 中国石油大学(华东) | Detection method of polymer flooding and gathering channel |
| CN104747149A (en) * | 2015-01-22 | 2015-07-01 | 中国石油大学(华东) | Detecting method of binary combined flooding agent migration channel |
| CN105715241A (en) * | 2016-01-15 | 2016-06-29 | 中国石油大学(华东) | Method for measuring polymer flooding relative permeability curve |
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| 井间示踪剂测试半解析方法体系数学模型;刘同敬等;《石油学报》;20070930;第28卷(第5期);全文 |
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