CN108049849B - Water-drive pool Plane Fluid Field regulates and controls design method - Google Patents
Water-drive pool Plane Fluid Field regulates and controls design method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000013461 design Methods 0.000 title claims abstract description 33
- 239000012530 fluid Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003921 oil Substances 0.000 claims abstract description 47
- 238000011156 evaluation Methods 0.000 claims abstract description 40
- 238000004458 analytical method Methods 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000011160 research Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
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- 241000208340 Araliaceae Species 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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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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Abstract
The present invention provides a kind of water-drive pool Plane Fluid Field regulation design method, comprising: step 1, carries out oils water boundary flow field analysis, calculates well pattern and fix, infuse the pressure field of single-phase flow and speed field distribution under the amount of adopting stable condition；Step 2, by oils water boundary and the nearly well stream moving boundary discretization of producing well, the ideal velocity vector sum actual speed vector for obtaining discrete location is calculated；Step 3, evaluation coefficient is sought, the difference in boundary flow field and individual well stream ideal velocity and true velocity is calculated separately；Step 4, judge whether evaluation coefficient adjusted meets desired value, when evaluation coefficient meets desired value, process enters step 5；Step 5, optimal well pattern and note are obtained according to the result of evaluation coefficient and adopts regulation design scheme.Water-drive pool Plane Fluid Field regulation design method can the current flow field of rapid quantitatively evaluating whether meet the needs of oil reservoir or individual well oil and water zonation, provide foundation to formulate reasonable flow field regulating strategy.
Description
Technical field
The present invention relates to oil field development technical fields, especially relate to a kind of water-drive pool Plane Fluid Field regulation design side
Method.
Background technique
Waterflooding development is the oil field development mode that current application is widest in area, technology is most mature, benefit is best.It is high in current
It permeates oil reservoir and generally enters High water cut, ultra-high water cut stage, liquid measure, sharply increasing for water become the main of restriction development effectiveness
Contradiction.The low oil price epoch are restricted by benefit factor, tradition and extensive style new well development mode it is hard to carry on.Thus, it improves existing
There is the method for oil-water well utilization efficiency to can be realized the increase of benefit.By exploration in recent years, flow field regulation method is had become
The common recognition of production managers.Mining site practice display can be matched under the premise of not increasing new well by changing oil-water well space
Relationship and the note amount of adopting are set, surge oil or decreasing water cut and increasing oil is realized, good economic benefit can be obtained in a short time.Although mining site is
Practical experience abundant is had accumulated, but lacks scientific and effective guidance all the time, especially traditional reservoir engineering and numerical value
Simulation means are out of strength to the explanation of mining site phenomenon, cause flow field regulation method to be still within various grope in conjecture, it is difficult to form skill
Art series precisely serves oil field production.We have invented a kind of new water-drive pool Plane Fluid Fields to regulate and control design method thus,
Solves the above technical problem.
Summary of the invention
The object of the present invention is to provide the matchings of velocity field and saturation field in a kind of solution Plane Fluid Field regulation design to set
Meter problem, the water-drive pool Plane Fluid Field that reservoir engineering is combined with numerical simulation regulate and control design method.
The purpose of the present invention can be achieved by the following technical measures: water-drive pool Plane Fluid Field regulates and controls design method, should
It includes: step 1 that water-drive pool Plane Fluid Field, which regulates and controls design method, carries out oils water boundary flow field analysis, calculates well pattern and fixes, infuses and adopt
Measure the pressure field and speed field distribution of single-phase flow under stable condition；Step 2, by oils water boundary and the nearly well stream moving boundary of producing well
Discretization calculates the ideal velocity vector sum actual speed vector for obtaining discrete location；Step 3, evaluation coefficient is sought, is counted respectively
Calculate the difference in boundary flow field and individual well stream ideal velocity and true velocity；Step 4, judge whether evaluation coefficient adjusted meets
Desired value, when evaluation coefficient meets desired value, process enters step 5；Step 5, it is obtained most according to the result of evaluation coefficient
Excellent well pattern and note adopts regulation design scheme.
The purpose of the present invention can be also achieved by the following technical measures:
It further includes before step 1, determining target constituency and initial strip that the water-drive pool Plane Fluid Field, which regulates and controls design method,
Part.
In the step of determining target constituency and primary condition, layer position, the well pattern, oils water boundary of goals research block are determined
The research phase is divided into several stages according to the variation of well pattern by position, each stage water injection well, producing well liquid measure use the moon
The average magnitude in degree or season carries out flow field analysis to be directed to each stage respectively.
In step 1, oil-water boundary is described according to geological conditions and Reservoir behavior, oil reservoir original state uses original oil
Waterside boundary line calculates well pattern and fixes, infuses the pressure field of single-phase flow and speed field distribution under the amount of adopting stable condition.
In step 1, well number is few, Analytic Method is used in the simple situation of well pattern, uses numerical value under conditions of complicated
Solution solves.
In step 2, carry out flow field analysis for oil reservoir oil-water boundary, oil-water boundary is discrete for N number of point, acquisition
N number of velocity vector V under the conditions of currently well pattern and note are adopted.
In step 2, for the velocity vector V at any point, the angle for defining itself and positive direction of the x-axis is θ, vector it is big
It is small to be | V |, the direction equal in magnitude velocity vector V is identical, and direction is the normal direction along oil-water boundary, with V ' and θ ' and it indicates, it is ideal
There are different degrees of differences in different location for speed and true velocity.
In step 2, the size of ideal velocity is the average value of true velocity, and calculation formula is as follows:
Wherein, vi' be certain point in flow field ideal velocity, viIt is the true velocity of the point, n is the number of velocity vector.
In step 3, evaluate the difference between ideal velocity and true velocity, seek oils water boundary evaluation coefficient R (θ, | v
|) and each individual well evaluation coefficient Pi(θ, | v |), synthetical evaluating coefficient A is then sought, boundary flow field and individual well stream are calculated separately
The difference of ideal velocity and true velocity, the difference including directional velocity difference and size use angle difference coefficient S (θ) respectively
It is indicated with mould coefficient of variation S (| v |).
, in step 3, angle difference coefficient formulas is as follows:
Wherein, S (θ) is angle difference coefficient, θi' be a certain spot speed in flow field desired angle, θiIt is a certain in flow field
The real angle of spot speed, n are the numbers of velocity vector；
Mould coefficient of variation calculation formula is as follows:
Wherein, S (| v |) is mould coefficient of variation, vi' be certain point in flow field ideal velocity, viIt is the true speed of the point
Degree, n is the number of velocity vector；
The product representation of the evaluation in boundary flow field and individual well flow field S (θ) and S (| v |), calculation formula are as follows:
Oils water boundary flow field evaluation coefficient:
Individual well flow field evaluation coefficient:
Synthetical evaluating coefficient:
A=R (θ, | v |)+∑ Pi (θ, | v |) (i=1,2,3 ...) (6)
Wherein, R (θ, | v |) indicates the matching degree in oils water boundary flow field, Pi(θ, | v |) indicate the flow field nearby producing well Pi
Matching degree, difference between the evaluation coefficient ideal flow field of smaller explanation and practical flow field is smaller more to be met the requirements.
In step 4, it when evaluation coefficient is unsatisfactory for desired value, adjusts well pattern and note adopts parameter, process returns to step
1, calculate a series of evaluation coefficient R adjusted (θ, | v |), Pi(θ,|v|)、A。
In steps of 5, according to demand and each well actual conditions, well pattern form is modified repeatedly and note adopts parameter, meet A value most
The smallest scheme of small or several individual well ∑ Pi is target optimal case.
Water-drive pool Plane Fluid Field in the present invention regulates and controls design method, from the weight to oil reservoir rank movement disciplinarian of oil and water
Water-oil phase is regarded as the two kinds of non-individual bodies for cooperating and mutually restricting by new knowledge.It is different from common reservoir numerical simulation side
Method handles grease for the two media of respective individual flow, and this method regards reservoir waterflooding as water filling energy with oil-water well
Spatial position, the note amount of adopting constantly are migrated the process of distribution, and the accumulation of energy at any time can change original saturation field
It makes, ultimately forms the oil and water zonation relationship in each stage.In analytic process, centered on velocity field, from oil reservoir and individual well two
Level evaluates its adaptedness with oil reservoir, helps to overcome conventional method oil reservoir whole matching and individual well local matching cannot be simultaneous
The shortcomings that Gu.This method is capable of the resonable degree of quantitative assessment Plane Fluid Field, to the adjustment direction of the parameters such as well pattern, working system
Give specific guidance.Low oil price epoch new well investment falls sharply, and maximally utilizing existing oil-water well resource is to increase warp in the stage
Help the only effective approach of benefit, and field experience has shown that flow field regulation is most economical effective means, and the present invention can be fast
Whether the fast current flow field of quantitative assessment meets the needs of oil reservoir or individual well oil and water zonation, mentions to formulate reasonable flow field regulating strategy
For foundation, the optimization that can scientifically instruct flow field to regulate and control improves the efficiency and precision of design, has a good application prospect.
Detailed description of the invention
Fig. 1 is the flow chart for the specific embodiment that water-drive pool Plane Fluid Field of the invention regulates and controls design method；
Fig. 2 is plane flow stream velocity field pattern in a specific embodiment of the invention；
Fig. 3 is oils water boundary flow field analysis method schematic diagram in a specific embodiment of the invention；
Fig. 4 is that two notes one adopt well pattern location diagram in a specific embodiment of the invention；
Fig. 5 is plane ideal radial flow fields schematic diagram in a specific embodiment of the invention；
Fig. 6 is the practical radial flow fields schematic diagram of plane in a specific embodiment of the invention.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
As shown in FIG. 1, FIG. 1 is the flow charts of water-drive pool Plane Fluid Field of the invention regulation design method.
Step 101, layer position, well pattern, the oils water boundary position for determining goals research block will be studied according to the variation of well pattern
Phase is divided into several stages, each stage water injection well, producing well liquid measure use monthly or season average magnitude, with respectively
Carry out flow field analysis for each stage.
Step 102, carry out for wherein some stage and analyze, oils water boundary is described according to geological conditions and Reservoir behavior
Original oil-water boundary can be used in line, oil reservoir original state, calculates the pressure that single-phase flow under the amount of adopting stable condition was fixed, infused to well pattern
The field of force and speed field distribution.Well number is less, Analytic Method can be used in the better simply situation of well pattern, makes under conditions of more complex
It is solved with numerical solution.
As shown in Fig. 2, being located at a bite producing well P1 at origin (0,0) on X/Y plane, which is produced with constant flow, shape
At stable velocity field.Speed field distribution under the conditions of Arbitrary Boundaries and well pattern can be obtained by Numerical Methods Solve
.
Step 103, by oils water boundary and the nearly well stream moving boundary discretization of producing well, the ideal speed for obtaining discrete location is calculated
Spend vector sum actual speed vector.
In one embodiment, for oil reservoir oil-water boundary carry out flow field analysis, by oil-water boundary it is discrete be N number of point,
Current well pattern can be obtained and infuse N number of velocity vector V under the conditions of adopting.
As shown in figure 3, for the velocity vector V at any point, the angle for defining itself and positive direction of the x-axis is θ, vector it is big
It is small to be | V |.The oil-water boundary for shown in, ideal flow field should meet that the direction equal in magnitude velocity vector V is identical, and direction is
Along oil-water boundary normal direction (being directed toward producing well), with V ' and θ ' it indicates, it is seen that ideal velocity and true velocity are in different location
There are different degrees of differences.
The size of ideal velocity | V ' | be the average value of true velocity, calculation method is as follows:
Wherein, vi' be certain point in flow field ideal velocity, viIt is the true velocity of the point, n is the number of velocity vector.
Carry out individual well flow field analysis one by one for producing well, as shown in figure 4, have two mouthfuls of water injection wells (I1, I2) in plane, one
It is the circle distribution of r along by center radius of producing well under the conditions of mouthful producing well (P1) can obtain current well pattern and note adopts
N number of velocity vector V.
Wherein, r is the angle that 1/2, θ of nearest water injection well distance is V and positive direction of the x-axis.As shown in figure 5, ideal conditions
VELOCITY DISTRIBUTION as shown in the figure should be met around lower P1 well, i.e. velocity magnitude is consistent, and direction is directed to center of circle producing well P1；And it is practical
Under the conditions of will form velocity field as shown in FIG. 6, the flow direction of third quadrant significant departure ideal flow in the figure, reason
Think that there are larger differences between speed and true velocity.
Step 104, the difference between ideal velocity and true velocity is evaluated, oils water boundary evaluation coefficient R (θ, | v |) is sought
With the evaluation coefficient P of each individual welli(θ, | v |), however synthetical evaluating coefficient A is sought, the purpose calculated for the first time is determining flow field tune
The target of control it is expected, in this, as the reference point of subsequent evaluation.
In one embodiment, evaluation coefficient is sought, boundary flow field and individual well stream ideal velocity and true velocity are calculated separately
Difference, the difference including directional velocity difference and size, respectively with angle difference coefficient S (θ) and mould coefficient of variation S (| v |)
It indicates, calculation formula is as follows:
Angle difference coefficient:
Wherein, S (θ) is angle difference coefficient, θi' be a certain spot speed in flow field desired angle, θiIt is a certain in flow field
The real angle of spot speed, n are the numbers of velocity vector.
Mould coefficient of variation:
Wherein, S (| v |) is mould coefficient of variation, vi' be certain point in flow field ideal velocity, viIt is the true speed of the point
Degree, n is the number of velocity vector.
The product representation of the evaluation in boundary flow field and individual well flow field S (θ) and S (| v |), calculation formula are as follows:
Oils water boundary flow field evaluation coefficient:
Individual well flow field evaluation coefficient:
Synthetical evaluating coefficient:
A=R (θ, | v |)+∑ Pi (θ, | v |) (i=1,2,3 ...) (6)
Wherein, R (θ, | v |) indicates the matching degree in oils water boundary flow field, Pi(θ, | v |) indicate the flow field nearby producing well Pi
Matching degree, difference between the evaluation coefficient ideal flow field of smaller explanation and practical flow field is smaller more to be met the requirements.
Step 105, judge whether evaluation coefficient adjusted meets desired value, if not satisfied, it is ideal to analyze each discrete point
Speed and true velocity difference feature enter step 106, redesign adjusting parameter.When ginseng result satisfaction expectation being adjusted to require, stream
Journey enters step 107.
Step 106, it adjusts well pattern and note adopts parameter, then repeatedly step 102 to 104, calculate adjusted a series of comment
Valence coefficients R (θ, | v |), Pi(θ,|v|)、A。
Step 107, optimal well pattern and note are obtained according to the result of the above multiple groups evaluation coefficient and adopts regulation design scheme.In
In one embodiment, according to demand and each well actual conditions, modify well pattern form repeatedly and note adopt parameter, if meet A value it is minimum or
The smallest scheme of dry individual well ∑ Pi is target optimal case.
Claims (12)
1. water-drive pool Plane Fluid Field regulates and controls design method, which is characterized in that the water-drive pool Plane Fluid Field regulates and controls design method
Include:
Step 1, oils water boundary flow field analysis is carried out, the pressure field that single-phase flow under the amount of adopting stable condition was fixed, infused to well pattern is calculated
With speed field distribution；
Step 2, by oils water boundary and the nearly well stream moving boundary discretization of producing well, the ideal velocity vector for obtaining discrete location is calculated
With actual speed vector；
Step 3, evaluation coefficient is sought, the difference in boundary flow field and individual well stream ideal velocity and true velocity is calculated separately；
Step 4, it when evaluation coefficient is unsatisfactory for desired value, adjusts well pattern and note adopts parameter, process returns to step 1, calculates and adjusts
Evaluation coefficient after whole, judges whether the evaluation coefficient sought meets desired value, when evaluation coefficient meets desired value, process into
Enter to step 5；
Step 5, optimal well pattern and note are obtained according to the result of evaluation coefficient and adopts regulation design scheme.
2. water-drive pool Plane Fluid Field according to claim 1 regulates and controls design method, which is characterized in that the water-drive pool is flat
It further includes before step 1, determining target constituency and primary condition that surface current field, which regulates and controls design method,.
3. water-drive pool Plane Fluid Field according to claim 2 regulates and controls design method, which is characterized in that determining target choosing
In the step of area and primary condition, layer position, well pattern, the oils water boundary position of goals research block are determined, according to the variation of well pattern
The research phase is divided into several stages, each stage water injection well, producing well liquid measure use monthly or season average magnitude,
Carry out flow field analysis to be directed to each stage respectively.
4. water-drive pool Plane Fluid Field according to claim 1 regulates and controls design method, which is characterized in that in step 1, root
Oil-water boundary is described according to geological conditions and Reservoir behavior, oil reservoir original state uses original oil-water boundary, and it is solid to calculate well pattern
Fixed, single-phase flow under the note amount of adopting stable condition pressure field and speed field distribution.
5. water-drive pool Plane Fluid Field according to claim 4 regulates and controls design method, which is characterized in that in step 1, well
It counts less, use Analytic Method in the simple situation of well pattern, solved under conditions of complicated using numerical solution.
6. water-drive pool Plane Fluid Field according to claim 1 regulates and controls design method, which is characterized in that in step 2, needle
To oil reservoir oil-water boundary carry out flow field analysis, by oil-water boundary it is discrete be N number of point, obtain current well pattern and note adopt under the conditions of
N number of velocity vector V.
7. water-drive pool Plane Fluid Field according to claim 6 regulates and controls design method, which is characterized in that in step 2, right
Velocity vector V in any point, the angle for defining itself and positive direction of the x-axis is θ, and the size of vector is | V |, velocity vector V is big
Small equal direction is identical, and direction is the normal direction along oil-water boundary, with V ' and θ ' it indicates, ideal velocity and true velocity are in difference
There are different degrees of differences for position.
8. water-drive pool Plane Fluid Field according to claim 7 regulates and controls design method, which is characterized in that in step 2, reason
The size for thinking speed is the average value of true velocity, and calculation formula is as follows:
Wherein, vi' be certain point in flow field ideal velocity, viIt is the true velocity of the point, n is the number of velocity vector.
9. water-drive pool Plane Fluid Field according to claim 1 regulates and controls design method, which is characterized in that in step 3, comment
Difference between valence ideal velocity and true velocity seeks the evaluation coefficient of oils water boundary evaluation coefficient R (θ, | v |) and each individual well
Pi(θ, | v |), then seeks synthetical evaluating coefficient A, calculates separately boundary flow field and individual well stream ideal velocity and true velocity
Difference, the difference including directional velocity difference and size, respectively with angle difference coefficient S (θ) and mould coefficient of variation S (| v |) come
It indicates.
10. water-drive pool Plane Fluid Field according to claim 9 regulates and controls design method, which is characterized in that in step 3,
Angle difference coefficient formulas is as follows:
Wherein, S (θ) is angle difference coefficient, θi' be a certain spot speed in flow field desired angle, θiIt is a certain spot speed in flow field
The real angle of degree, n are the numbers of velocity vector；
Mould coefficient of variation calculation formula is as follows:
Wherein, S (| v |) is mould coefficient of variation, vi' be certain point in flow field ideal velocity, viIt is the true velocity of the point, n is
The number of velocity vector；
The product representation of the evaluation in boundary flow field and individual well flow field S (θ) and S (| v |), calculation formula are as follows:
Oils water boundary flow field evaluation coefficient:
Individual well flow field evaluation coefficient:
Synthetical evaluating coefficient:
A=R (θ, | v |)+∑ Pi (θ, | v |) (i=1,2,3 ...) (6)
Wherein, R (θ, | v |) indicates the matching degree in oils water boundary flow field, Pi(θ, | v |) indicates in the neighbouring flow field producing well Pi
With degree, the smaller difference illustrated between ideal flow field and practical flow field of evaluation coefficient is smaller more to be met the requirements.
11. water-drive pool Plane Fluid Field according to claim 10 regulates and controls design method, which is characterized in that in step 4,
When evaluation coefficient is unsatisfactory for desired value, adjusts well pattern and note adopts parameter, process returns to step 1, calculates a system adjusted
Column evaluation coefficient R (θ, | v |), Pi(θ, | v |), A.
12. water-drive pool Plane Fluid Field according to claim 11 regulates and controls design method, which is characterized in that in steps of 5,
According to demand and each well actual conditions, modify well pattern form repeatedly and note adopt parameter, meet that A value is minimum or several individual well ∑ Pi most
Small scheme is target optimal case.
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