CN117371069A

CN117371069A - Method and system for optimizing filling scheme of single-layer-drive streamline regulator of vertical and inclined well group

Info

Publication number: CN117371069A
Application number: CN202311666151.6A
Authority: CN
Inventors: 董业良; 刘德新; 赵晗; 吴达; 王佳强
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-01-09
Anticipated expiration: 2043-12-07
Also published as: CN117371069B

Abstract

The invention discloses a method and a system for optimizing a single-layer pressure flooding streamline regulator filling scheme of a straight inclined well group, and relates to the technical field of oilfield pressure flooding water injection energy increasing efficiency. The optimization scheme of the streamline regulator with reasonable use of the streamline regulator and good pressure-driving effect can be obtained only by a small amount of data which are easy to acquire.

Description

Method and system for optimizing filling scheme of single-layer-drive streamline regulator of vertical and inclined well group

Technical Field

The invention relates to the technical field of oilfield pressure flooding water injection energy increasing efficiency improvement, in particular to a method and a system for optimizing a single-layer pressure flooding streamline regulator filling scheme of a straight inclined well group.

Background

Low permeability sandstone reservoirs often have unbalanced injection and production due to difficult water injection, resulting in rapid decline of formation energy attenuation and yield. The pressure flooding technology is considered as an important technology for quickly supplementing energy of a reservoir and improving development effect of a low-permeability reservoir by forcibly injecting a large amount of water into the stratum in a short time through high-pressure equipment, but faces the problems of directional breakthrough and water channeling in field practice, and is characterized in that secondary streamline effect is not obvious, main streamline liquid is high but water content is also high, and each oil well in a well group cannot be uniformly influenced, so that development effect is influenced, and therefore, a streamline regulator is required to be added in the pressure flooding process, and the performance of the streamline regulator for improving the seepage resistance of a swept area is utilized to force the subsequently injected fluid to be diverted to other areas, so that the flow field is improved, and balanced effect is promoted. The addition amount, the addition times and the addition time of the streamline regulating agent influence the streamline regulating effect, so that a reasonable scheme needs to be optimized, and the effect of the agent is exerted as fully as possible, but no scheme design method which is simple, convenient and feasible, has higher accuracy and is suitable for a pressure driving scene exists at present.

CN114439437a provides a method for improving recovery of low permeability reservoirs by water flooding. The method gives out how to determine the injection amount and injection time of the water well, the soaking production time of the oil well and the like in the pressure driving process, and does not relate to improving the pressure driving effect by regulating and controlling the medicament through a streamline.

CN114165201B provides a method of pressure flooding water. According to the method, a geological model or an oil reservoir numerical model is built for the well group, geological parameters or the oil reservoir numerical model are analyzed according to the pressure flooding channeling-preventing preset conditions, and a target pressure flooding well is determined from the well group according to an analysis result, so that the probability of pressure flooding water channeling of the target pressure flooding well is smaller than a preset threshold value. The method has the significance of screening the target pressure flooding well, wherein the pressure flooding is single water injection, and no streamline regulation and control agent is involved.

CN115875030a provides a method for designing injection quantity and optimizing parameters of oil well cracks under the condition of pressure driving of a water injection well. According to the method, a target block heterogeneous three-dimensional pressure flooding water injection reservoir black oil geological model is established, the condition that surfactant components are added in the water injection process is considered, the formation of a water injection well pressure flooding fracture network under the condition of different daily injection amounts is simulated by utilizing numerical simulation software, and the optimal oil production well fracture half-length is obtained through capacity simulation and three-year cumulative oil production comparison. The method can guide the design of daily injection water quantity of the pressure flooding, does not involve streamline regulation, only has the effect of improving the oil washing efficiency by imbibition, and does not optimize the use of the surfactant.

CN115841083a provides a method for determining the pressure-driven injection capacity of a water injection well. The method utilizes an ellipsoid model to calculate the volume of the water drive wave and the radial inner hole to determine the pressure drive water injection quantity, and compares and optimizes the pressure drive water injection quantity with a material balance method to determine reasonable displacement radius and pressure drive water injection quantity. The method can guide the design of the total water injection amount of the pressure flooding, but the pressure flooding process is single water injection, and no streamline regulation and control agent is involved.

CN115205062a provides a method for calculating the optimum water injection rate for reservoir pressure flooding. The method is characterized in that the minimum water injection amount and the maximum water injection amount are searched and determined through a relation chart of the pressure flooding water injection amount and the stratum pressure change amount, the accumulated net present value corresponding to different water injection amounts is calculated in the water injection amount value range, and the maximum accumulated net present value is used as a standard to determine the optimal water injection amount. The method is also used for guiding the design of the total water injection amount of the pressure flooding, wherein the pressure flooding process is single water injection, and no streamline regulating and controlling medicament is involved.

CN104531116B provides a reservoir deep fluid diversion agent, a preparation method and application thereof. The method prepares the oil reservoir deep liquid flow diverter which is used for profile control and flooding of the water well. The medicament prepared by the method can be used as a streamline regulator in the pressure driving process, but a using method of the medicament in a pressure driving scene is not provided.

CN114634805B provides a self-growing gel dispersion active fluidity control system and a channeling control method for hypotonic-tight reservoirs. The channeling control method aims at huff and puff of the low permeability-tight reservoir oil well, adjusts the dosage of the medicament according to the rising amplitude of wellhead pressure in the construction process, and is not suitable for a pressure flooding water injection scene.

CN114645690a provides a gel dispersion compound profile control process. The application scene is conventional water injection profile control and flooding, the consumption design basis is the large pore volume of the stratum, and the method is not suitable for the pressure flooding water injection scene.

Dai Caili (Dai Caili, chen, liu Yifei, etc.), the matching rule of the elastic gel dispersion and pore throat and the deep regulation mechanism) is summarized through core experiments, the particle size of the elastic gel dispersion is optimized according to reservoir conditions, the particle size is used for guiding the profile control of conventional water injection, the method is not suitable for high-pressure water injection scenes of pressure flooding, and the optimal design in the aspects of medicament addition amount, addition time and the like is not involved.

CN109267985B provides a method for controlling the amount of temporary plugging agent used in temporary plugging diverting fracturing; CN110685657a provides a method for calculating the amount of temporary plugging particles for steering fracturing; CN111980652B provides a method for determining the type, size combination and amount of temporary plugging agent in the seam; CN113468831a provides a method for designing the amount of temporary plugging material in the fracture; CN114592823a provides a method for determining the amount of temporary plugging steering material and application thereof; CN115898324B provides a method for optimizing the amount of temporary plugging diverter. The temporary plugging agents in the methods can play a role in streamline steering, but are used for plugging cracks in a fracturing scene, and have no adaptability to a fracturing scene.

In summary, the current pressure flooding field is mainly aimed at a scheme design and optimization method under the condition of single water injection, and does not relate to a scheme design and optimization method of a streamline regulator; the products such as the liquid flow steering agent, the gel dispersion and the temporary plugging agent with the streamline regulation function are mainly applied to the profile control and flooding process or the fracturing steering process of conventional water injection at present, and the use, scheme design and optimization method are not applicable in the pressure flooding scene.

Disclosure of Invention

The invention aims to provide an optimization method and an optimization system for a single-layer pressure-driving streamline regulator filling scheme of a straight inclined well group, which can simply, conveniently, accurately determine the optimal filling scheme of the streamline regulator under the single-layer pressure-driving background of the straight inclined well group, so as to guide the reasonable use of the streamline regulator in the single-layer pressure-driving process of the straight inclined well group and improve the pressure-driving effect.

In order to achieve the above object, the present invention provides the following solutions:

the invention provides an optimization method for a single-layer-pressure-driving streamline regulator filling scheme of a straight inclined well group, which comprises the following steps:

obtaining a pressure flooding well group parameter of a target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise the porosity of a reservoir layer of the reservoir layer where the target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding.

Constructing a space geometric model of a communication area corresponding to the effective oil well based on well position coordinates of the injection well and each effective oil well, well distances between the effective oil well and the injection well and injection effective thickness between the injection well and the effective oil well; for the communication area corresponding to each effective oil well, the communication area corresponding to the effective oil well is a three-dimensional cake-shaped area taking the injection well as the center of a circle, taking the well distance between the injection well and the effective oil well as the radius as the upper surface, and taking the injection effective thickness of the injection well and the effective oil well as the heights of two sides; the central angle of the projection fan of the communication area is an included angle formed by two adjacent angular bisectors of the effective oil well; the adjacent angular bisector is an angular bisector of an included angle formed by the projection of a connecting line of the effective oil well and the injection well and a connecting line of the adjacent effective oil well and the injection well of the effective oil well; the height of the arc-shaped surface of the communication area is the effective injection thickness of the effective oil well.

For each initial streamline regulator filling scheme, filling simulation is carried out by setting injection step length based on the space geometric model, and driving rate corresponding to the communication area of each affected oil well is calculated according to the pressure flooding well group parameters of the target pressure flooding well group, the central angle of the projection sector of the communication area corresponding to the affected oil well and streamline regulator performance data; calculating driving standard parameters corresponding to the initial streamline regulator filling scheme according to driving rates corresponding to all the communication areas of the affected oil wells; the streamline regulator performance data comprise the influence area of the streamline regulator and the change amplitude of the streamline regulator on the permeability of the influence area; the total injection amount, the addition times and the addition time of the streamline regulator of each initial streamline regulator filling scheme are different; and setting an injection step length to be determined by the total injection amount of the pressure flooding.

And determining an optimal streamline regulator filling scheme according to the driving standard parameters corresponding to all the initial streamline regulator filling schemes.

The invention also provides an optimization system for the filling scheme of the single-layer-pressure-driving streamline regulator of the vertical and inclined well group, which comprises the following components:

the pressure flooding well group parameter acquisition module is used for acquiring the pressure flooding well group parameters of the target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise the porosity of a reservoir layer of the reservoir layer where the target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding.

The model construction module is used for constructing a space geometric model of a communication area corresponding to the effective oil well based on well position coordinates of the injection well and each effective oil well, well distances between the effective oil well and the injection well and injection effective thickness between the injection well and the effective oil well; for the communication area corresponding to each effective oil well, the communication area corresponding to the effective oil well is a three-dimensional cake-shaped area taking the injection well as the center of a circle, taking the well distance between the injection well and the effective oil well as the radius as the upper surface, and taking the injection effective thickness of the injection well and the effective oil well as the heights of two sides; the central angle of the projection fan of the communication area is an included angle formed by two adjacent angular bisectors of the effective oil well; the adjacent angular bisector is an angular bisector of an included angle formed by the projection of a connecting line of the effective oil well and the injection well and a connecting line of the adjacent effective oil well and the injection well of the effective oil well; the height of the arc-shaped surface of the communication area is the effective injection thickness of the effective oil well.

The driving standard parameter calculation module is used for carrying out filling simulation on each initial streamline regulator filling scheme based on the space geometric model by setting injection step length, and calculating the driving rate corresponding to the communication area of each affected oil well according to the pressure driving well group parameter of the target pressure driving well group, the central angle of the projection sector of the communication area corresponding to the affected oil well and the streamline regulator performance data; calculating driving standard parameters corresponding to the initial streamline regulator filling scheme according to driving rates corresponding to all the communication areas of the affected oil wells; the streamline regulator performance data comprise the influence area of the streamline regulator and the change amplitude of the streamline regulator on the permeability of the influence area; the total injection amount, the addition times and the addition time of the streamline regulator of each initial streamline regulator filling scheme are different; and setting an injection step length to be determined by the total injection amount of the pressure flooding.

And the optimal scheme determining module is used for determining an optimal streamline regulator filling scheme according to the driving standard parameters corresponding to all the initial streamline regulator filling schemes.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a method and a system for optimizing a single-layer pressure flooding streamline regulator filling scheme of a straight inclined well group. The invention can obtain the optimized scheme (optimal streamline regulator filling scheme) of the streamline regulator with reasonable use of the streamline regulator and good pressure-driving effect by only needing a small amount of extremely easily acquired data (the pressure-driving well group parameters of the target pressure-driving well group).

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of an optimization method of a single-layer drive streamline regulator filling scheme of a vertical and inclined well group;

FIG. 2 is a detailed flow chart of the scheme optimization of the single-layer flooding streamline regulator for the vertical and inclined well group provided by the invention;

FIG. 3 is a diagram of the position of each well point of the pressure flooding well group provided by the invention;

FIG. 4 is a plan view of the injection well and each of the affected well communication areas provided by the present invention;

FIG. 5 is a schematic illustration of a thin injection and thick production space geometry model provided by the present invention;

FIG. 6 is a schematic diagram of the calculation of the spatial volume of a thin injection and thick production model provided by the invention;

FIG. 7 is a longitudinal cross-sectional view (front view) of a thin injection and production model provided by the invention;

FIG. 8 is a schematic representation of a thick injection thin production space geometry model provided by the present invention;

FIG. 9 is a schematic diagram of calculation of the volume of a thick injection and thin production space provided by the invention;

FIG. 10 is a longitudinal cross-sectional view (front view) of a thick injection and thin production model provided by the invention;

fig. 11 is a flowchart of calculating the standard deviation of the splitting coefficient, splitting component, driving distance and driving rate of the injection in each direction provided by the invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide an optimization method and an optimization system for a single-layer pressure-driving streamline regulator filling scheme of a straight inclined well group, and an optimization scheme (an optimal streamline regulator filling scheme) of a streamline regulator with reasonable use of the streamline regulator and good pressure-driving effect can be obtained through a small amount of data (pressure-driving well group parameters of a target pressure-driving well group) which are easy to obtain.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Example 1:

as shown in fig. 1 and fig. 2, the embodiment provides a method for optimizing a filling scheme of a single-layer laminated flooding line regulator for a vertical and inclined well group, which includes:

s1: obtaining a pressure flooding well group parameter of a target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise the porosity of a reservoir layer of the reservoir layer where the target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding.

S2: constructing a space geometric model of a communication area corresponding to the effective oil well based on well position coordinates of the injection well and each effective oil well, well distances between the effective oil well and the injection well and injection effective thickness between the injection well and the effective oil well; for the communication area corresponding to each effective oil well, the communication area corresponding to the effective oil well is a three-dimensional cake-shaped area taking the injection well as the center of a circle, taking the well distance between the injection well and the effective oil well as the radius as the upper surface, and taking the injection effective thickness of the injection well and the effective oil well as the heights of two sides; the central angle of the projection fan of the communication area is an included angle formed by two adjacent angular bisectors of the effective oil well; the adjacent angular bisector is an angular bisector of an included angle formed by the projection of a connecting line of the effective oil well and the injection well and a connecting line of the adjacent effective oil well and the injection well of the effective oil well; the height of the arc-shaped surface of the communication area is the effective injection thickness of the effective oil well.

S3: for each initial streamline regulator filling scheme, filling simulation is carried out by setting injection step length based on the space geometric model, and driving rate corresponding to the communication area of each affected oil well is calculated according to the pressure flooding well group parameters of the target pressure flooding well group, the central angle of the projection sector of the communication area corresponding to the affected oil well and streamline regulator performance data; calculating driving standard parameters corresponding to the initial streamline regulator filling scheme according to driving rates corresponding to all the communication areas of the affected oil wells; the streamline regulator performance data comprise the influence area of the streamline regulator and the change amplitude of the streamline regulator on the permeability of the influence area; the total injection amount, the addition times and the addition time of the streamline regulator of each initial streamline regulator filling scheme are different; and setting an injection step length to be determined by the total injection amount of the pressure flooding.

S4: and determining an optimal streamline regulator filling scheme according to the driving standard parameters corresponding to all the initial streamline regulator filling schemes.

The method for optimizing the filling scheme of the single-layer pressure flooding streamline regulator of the vertical and inclined well group is specifically introduced aiming at a certain pressure flooding well group (comprising 1 injection well and 3 effective wells, which are all vertical wells) of the winning oilfield division of the petrochemical company, wherein the pressure flooding layer is a single layer:

Step one, obtaining data (the parameters of the pressure flooding well group of the target pressure flooding well group): the method comprises reservoir development, injection well static data, pressure flooding total injection amount data and streamline regulator performance data; the reservoir development data mainly obtain the reservoir where the pressure driving well group is locatedPorosity of the porous bodyThe static data of the injection well mainly obtain the well position coordinates of the injection well and each affected well +.>Effective thickness of jet>Permeability of small layer->And the well spacing of each affected well from the injection well +.>Among the above parameters, the index of the injection well is i 0, and the index of the n affected communication oil wells (affected oil wells) is i +.>The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the total injection quantity of the pressure driving>The known quantity is determined by the development history and the current stratum defect condition; the performance data of the streamline regulator mainly obtain the change amplitude of the permeability of the affected area after the streamline regulator is added, wherein the multiple of the affected area is +.>Indicating that the area of influence of the streamline regulator is +.>The magnitude of the change in permeability is +.>Indicating that the permeability of the affected area will decrease from k to；/>Obtained by two-dimensional or three-dimensional visual oil displacement experiments>And (3) carrying out oil displacement experiments according to the natural rock core of the target reservoir or the artificial rock core of the simulated target reservoir, wherein the oil displacement experiments are provided by streamline regulator manufacturers and are of known quantity.

It should be noted that, in this embodiment, the injection well (i.e., the injection well and the affected well) are vertical wells and/or inclined wells, the injection production intervals are all vertical, and the pressure-driving layer is a single layer. When the inclined shaft exists in the injection and production well, the track of the inclined shaft is inclined at the non-production interval, and the injection and production interval is vertical (the situation is consistent with the situation of most actual inclined shafts).

The types of streamline regulating agents adopted in the embodiment include, but are not limited to, weak gel, water swelling body, gel dispersion, flexible particles and microspheres, and the action mode is to change the permeability of an affected area, increase the flow resistance, promote the subsequent injection fluid to be more turned to other areas with smaller resistance, achieve the purpose of streamline regulation, and not necessarily completely block the affected area.

Amplitude of change in permeability after addition of streamline regulatorAnd carrying out oil displacement experiments through the natural rock core of the target reservoir or the artificial rock core of the simulated target reservoir to determine: the core is injected with water at a constant speed at a higher injection speed, and the steady flow is recorded +.>And displacement differential pressure>The method comprises the steps of carrying out a first treatment on the surface of the Injecting streamline regulator into the core, standing for a period of time, injecting water at constant speed at a higher injection speed, and recording the steady flow +. >And displacement differential pressure>The method comprises the steps of carrying out a first treatment on the surface of the Then calculate toThe method comprises the steps of carrying out a first treatment on the surface of the The streamline regulator increases the seepage resistance, and the +.>The method comprises the steps of carrying out a first treatment on the surface of the In practical application, the drug is added>The values are often provided by the flow line modulator manufacturer as a known quantity for direct access. Influence area multiple after streamline regulator addition>The method is characterized by comprising the following steps of obtaining through a two-dimensional or three-dimensional visual oil displacement experiment: adding streamline regulator solution after pressure driving for a period of time in a flat plate or radial cylinder model and the like, and carrying out dyeing treatment on the subsequent pressure driving fluid to continue the pressure driving; one part of dyeing fluid is diverted to other areas with smaller seepage resistance, the other part of dyeing fluid is driven by bypassing the influence area of the streamline regulator, and the relation between the injection volume of the streamline regulator solution and the influence area of the streamline regulator solution can be obtained according to the dyeing area; in practical application, the drug is added>The values are provided by the flow line modulator manufacturer as known amounts for direct access.

(1) The positional relationship of each well point of the pressure flooding well group is shown in fig. 3, and static data of the reservoir development and the injection and production well are summarized as shown in table 1:

table 1 example reservoir conditions where well group is located and well group injection and production well static data:

total injection amount of the present pressure drive30000 m.According to the use instruction given by the pharmaceutical manufacturer, the use concentration of the streamline regulator is 4%, and the change amplitude of the streamline regulator on the permeability after the streamline regulator is added is +. >=0.02, influence region multiple +.>=90。

Step two, establishing a space geometric model of the communication area between the injection well and each affected oil well:

1. from the plane (i.e. top view) according to the well position coordinates of each wellThe positional relationship between the injection well point O and the well point A, B, C of the 3 wells is shown in fig. 3. On the basis, according to the well position relation, connecting the injection well point with n affected oil well points to obtain n angles which take the injection well point as an endpoint and the adjacent connecting line as sides, making angle bisectors for the angles, then taking the injection well point as a center of a circle, taking each connecting line as a radius to be circular arcs on two sides, intersecting the circular arcs with the angle bisectors closest to the two sides of the connecting line to obtain n sector areas, namely, a plan view (projection view) of the communication area between the injection well and each oil well, obtaining the center angle of each sector according to the well position coordinate or by utilizing AutoCAD, and marking as%>. Taking FIG. 4 as an example, on the basis of FIG. 3, OA, OB, OC are connected as +.>、/>、/>Angular bisectors Oa, ob, oc, then using O as the center of a circle, using OA as the radius to arc to two sides, respectively intersecting Oa and Oc at the point F and E, the obtained fan-shaped EOF is the communication area between the injection well and the oil well 1Plan view, obtaining sector central angle +. >And (d). By the same method, the plan view of the communication area between the injection well and the oil well 2 and 3 and the central angle of the corresponding projection fan shape can be obtained by the same method. Central angle of projection fan of oil well 2rad, central angle of projection sector of well 3 +.> rad。

2. In terms of three-dimensional space, when the effective jet thickness of an oil well is larger than that of an injection well, assuming that the injection well and an affected oil well are at the same bottom depth, the effective thickness between the injection well and the affected oil well accords with linear change, a space geometric model of thin injection and thick production is built, at the moment, a gradually thickened three-dimensional cake diagram is formed from the injection well to the affected oil well, as shown in fig. 5 (three-dimensional of fan-shaped EOF in fig. 4), OO 'is the effective thickness of the injection well, AA' is the effective thickness of the oil well, andthe space geometrical model of the communication area between the injection well and the affected oil well is gradually thickened stereoscopic cake diagram, and the pore volume of the space can be deduced according to the model>And the cumulative injection amount of the space +.>Distance from drive (distance from injection front)>Taking the connection area between the injection well and the oil well 1 as an example, the deduction process and the result are as follows:

(1) The whole idea is as follows: as shown in fig. 6, the spatial pattern is cut into infinite differential units (hatched areas) with NMGH as a cross section and a thickness dr The volume enclosed by the domain) then from 0 toIntegrate r.

(2) Calculation of NMGH cross-sectional area: because the effective thickness of the injection well and the affected well are different,deviation of valuesBut the arc NM and the arc HG have equal lengths, so NMGH can be regarded as a rectangle with one group of opposite sides being arc-shaped and the other group of opposite sides being straight line, and the area of the rectangle is arc-shaped +.>The length of the line MG is multiplied by the length of the line MG as follows:

1) Arc-shapedLength calculation of (2): according to the arc calculation formula>. (where r refers to the length of O' G in FIG. 6).

2) Length calculation of line segment MG: as shown in FIG. 7, the longitudinal section of the thin injection and thick production model is that OO ' F ' F is right trapezoid, and OT is parallel to O ' F ' and respectively intersects MG with K and FF ' with T, then inIn (I)>ThenFurther obtain。

3) NMGH cross-sectional area of。

(3) Calculation of the spatial void volume:. When (when)、/>When (I)>Just equal to the central angle +.>Is the volume of the incomplete cylinder; when->、And->When (I)>Just equal to the volume of the complete cylinder; the correctness of the formula is demonstrated.

(4) Assuming that the displacement fluid uniformly advances in the communication region, the integral range of the fixed integral is 0 to the drive distanceThe result of the fixed integration at this time is the accumulated liquid supply amount in the effective direction +. >I.e.。

3. From the three-dimensional space, when the oil well is effectively ejected to open the thicknessWhen the degree is smaller than the effective jet thickness of the injection well, assuming that the injection well is communicated with the same bottom depth of the oil well, the effective thickness between the injection well and the communicated oil well accords with linear change, a space geometric model of thick injection thin production is established, at the moment, a gradually thinned solid cake diagram is formed from the injection well to the oil well, as shown in fig. 8 (the solid of fan-shaped EOF in fig. 3), OO 'is the effective thickness of the injection well, AA' is the effective thickness of the oil well, andthe space geometric model of the injection well and the oil well is a gradually thinned solid cake diagram, and the pore volume of the space can be deduced according to the model>And the cumulative injection amount of the space +.>Distance from drive->The relationship, deduction process and result are as follows:

(1) As shown in fig. 9, the spatial pattern is cut into infinite differential units (volume surrounded by hatched area) with NMGH as a cross section and a thickness dr, and then from 0 toIntegrate r.

(2) Calculation of NMGH cross-sectional area: the same thin injection and thick production model has an arc-shaped areaThe length of the line MG is multiplied by the length of the line MG as follows:

1) Arc-shapedLength calculation of (2): same-thin injection thick mining model>。

2) Line segment Length calculation of MG: as shown in FIG. 10, the longitudinal section of the thick injection and thin production model is that OO ' F ' F is right trapezoid, FT is parallel to F ' O ' and intersects MG with K and OO ' with T respectively, and thenIn (I)>ThenFurther obtain。

3) NMGH cross-sectional area of。

(3) Calculation of the spatial void volume:；

(4) Assuming that the displacement fluid uniformly advances in the communication region, the integral range of the fixed integral is 0 to the drive distanceThe result of the fixed integration at this time is the accumulated liquid supply amount in the effective direction +.>I.e.。

According to the above, the effective thickness of the injection well is smaller than that of the oil well 1, and a thin injection and thick production model is adopted, so that the space pore volume is as follows:(unit: m means). The effective thickness of the injection well is also smaller than that of the oil well 2, and a thin injection and thick production model is used for obtaining

(unit: m means); the effective thickness of the injection well is larger than that of the oil well 3, and a thick injection thin production model is adopted to calculate

(unit: m means).

Dividing injection step sizes: dividing the injection step length (setting the injection step length): total injection amount of the pressure driveDividing into a plurality of step sizes, wherein each step size is 100m W, and the total step size is +.>（/>Typically an integer multiple of 100, if not an integer multiple, is +. >Rounding to large). The total injection amount of the pressure flooding of the example is 30000m ³ Each step length is 100m ³ Then divide into total step number。

It should be noted that the total injection amount of the pressure flooding and the single injection amount of the streamline regulator solution are generally 100m ³ Thus dividing each step into 100m ³ The method comprises the steps of carrying out a first treatment on the surface of the If the step length is too small, the calculation steps are too many, and the operand is too large; if the step size is too large, the injection split coefficient and split component updating of the region are too late, and the calculation accuracy is reduced.

Step four, setting a first initial streamline regulator filling scheme (namely scheme one): the scheme one is specifically as follows: pressing to half of the total amount (i.e. injecting to 15000m in step length m=151 to 165), adding 1500m at a time ³ A streamline regulator solution.

The development of the pressure drive often controls the cost of the medicament, firstly, the upper limit of the dosage of the pure agent of the flow line regulator is calculated according to the maximum input cost of the medicament and the unit price of the medicament, and then the upper limit of the dosage volume of the flow line regulator solution is calculated according to the use concentration of the flow line regulator. The upper limit of the volume of the flow line regulator solution calculated according to the cost is 1500m ³ . On the premise of ensuring the streamline regulating effect, the process is simple, the operation is convenient, the streamline regulating agent is often added once or twice, and the single-layer flooding adding frequency is generally not more than three times; the differences among the schemes mainly include different filling amounts, filling timings and filling times of the streamline regulating agent; in order to show the effect of the streamline regulator, in a series of schemes, a scheme without adding the streamline regulator can be used as comparison.

Taking the first scheme as an example, under each injection step length in the first scheme, the injection split coefficient, split amount, accumulated injection liquid amount and accumulated injection streamline regulator solution amount of each connected region are calculated, and after all the step lengths are completed, the driving distance (injection front edge distance), driving rate and driving rate standard deviation (driving standard parameter) of each connected region are calculated, as shown in fig. 11, specifically, the following steps are performed:

calculating the driving rate corresponding to the communication area of each affected oil well according to the pressure flooding well group parameters of the target pressure flooding well group, the central angle of the projection fan shape of the communication area corresponding to the affected oil well and the streamline regulator performance data, wherein the method specifically comprises the following steps:

(1) And for each affected oil well, calculating the space pore volume of the affected oil well according to the injection effective thickness of the injection well and the affected oil well, the central angle of a projection fan shape of a communication area corresponding to the affected oil well, the well spacing of the affected oil well and the injection well and the reservoir porosity.

(2) Calculating the injection front distance of the communication area of the affected oil well according to the space pore volume of the affected oil well, the pressure flooding well group parameter of the target pressure flooding well group and the streamline regulator performance data, wherein the method specifically comprises the following steps:

Initializing the accumulated injection liquid amount, the accumulated injection streamline regulator solution amount, the injection front distance and the basic stratum coefficient of the communication area of the affected oil well; the base formation coefficients are determined by the small bed permeability and the open effective thickness of the injection well and the affected well.

And calculating the real-time stratum coefficient of the affected oil well at the current injection step according to the accumulated injection streamline regulator solution amount of the last injection step, the space pore volume of the affected oil well and the streamline regulator performance data.

Calculating the splitting component corresponding to the affected oil well of the current injection step according to the real-time stratum coefficient of the affected oil well of the current injection step, wherein the method specifically comprises the following steps: calculating the injection split coefficient corresponding to each effective oil well of the current injection step according to the real-time stratum coefficients of all the effective oil wells of the current injection step; and calculating the split component corresponding to each effective oil well of the current injection step according to the injection split component corresponding to each effective oil well of the current injection step.

And calculating the accumulated injection liquid quantity of the communication area of the affected oil well after the current injection step length according to the split quantity corresponding to the affected oil well of the current injection step length.

Judging whether the current injection step length reaches a set injection step length, if so, calculating the injection front distance of the communication area of the affected oil well according to the accumulated injection liquid amount of the communication area of the affected oil well, the central angle of a projection fan, the injection effective thickness of the injection well and the affected oil well, the reservoir porosity and the well distance between the affected oil well and the injection well; if not, returning to ' calculating the real-time stratum coefficient of the affected oil well at the current injection step length according to the accumulated injection streamline regulator solution amount of the last injection step length, the space pore volume of the affected oil well and the streamline regulator performance data ', until the current injection step length reaches the set injection step length '.

(3) And calculating the driving rate corresponding to the communication area of the affected oil well according to the injection front distance of the communication area of the affected oil well and the well distance between the affected oil well and the injection well.

Taking the above-mentioned China petrochemical industry Co Ltd rather than oil field division company as an example, a certain pressure driving well group (including 1 injection well and 3 effective oil wells, which are all straight wells, and the pressure driving layer is a single layer) is taken to specifically introduce the calculation process of the driving rate:

1) Initializing the accumulated injection amount of each communication areaAccumulating the solution quantity of the injection streamline regulator>Distance of driving->Basic stratum coefficient->. In the initial state, the step size m=0 may be considered that the press driving has not yet started, and at this time: /> =0。/>=0。/>=0. Because the well groups to be driven by pressure are well groups with insufficient stratum energy, the working fluid level of each oil well is low, and the flow pressure of the oil well is small, the displacement pressure difference of the injection well towards each affected oil well is similar; according to the planar radial flow Darcy formula, the liquid amount of the injection well in the direction of each effective oil well is approximately considered to be proportional to the stratum coefficient kh, the basic stratum coefficient of each communication area +.>For the average of the formation coefficients of the injection well and the affected well, the calculation is as follows:

（/>）。

the base formation coefficients for each affected well are calculated as follows for each affected well according to the above:

。

2) Initializing a step size. Let m=1, enter the press drive 1 st step.

3) Calculating real-time formation coefficients. When the pressure driving is not started, the head is added>The method comprises the steps of carrying out a first treatment on the surface of the After the pressure flooding injection with at least 1 step length is completed, the real-time stratum coefficient of the area is the streamline regulator influence area ++>Stratum coefficient of>And unaffected areasBasic stratum coefficient->According to a weighted average of volumes, i.e. 。

Wherein,the real-time stratum coefficient of the ith affected well is the mth injection step length; />Injecting a step length streamline regulating agent into an influence area of the m-1 th step length streamline regulating agent; />Is the influence area multiple of the streamline regulator; />The accumulated injection streamline regulator solution amount for the m-1 th injection step; />The change amplitude of the permeability of the influence area for the streamline regulator; />A base formation coefficient for the ith affected well; />Is the spatial pore volume of the ith affected well.

Current injection step size specific to each effected well:

；

4) Calculating split coefficients. Injection split coefficient of each affected direction +.>Specifically to the step length:

。/>

。

it can be seen that if no flow line regulator is added during the entire pressure flooding process, the injected fluid will flow mostly in the direction of the well 2.

5) Calculating the split component. The injected split component of each effective direction in the case of single step length, namely, the single step length is 100m, the liquid supply distribution amount of the injection amount to each effective direction is calculated as +.>Specifically to the current injection step:

m³。

6) UpdatingAnd->. The current injection step length is not injected with streamline regulator solution, and all are communicatedRegional streamline regulator solution cumulative inflow volume +.>Is +.>Equal; if the current injection step is to inject the streamline regulator solution, < > >The latest value of (2) is +.>Add the split component of the current implant step size +.>I.e. +.>. Wherein (1)>And (3) adding the flow line regulator solution amount for the accumulated injection flow line regulator solution amount of the ith affected oil well with the current injection step length.

Similarly, the->，/>The method comprises the steps of carrying out a first treatment on the surface of the Whether or not the streamline regulator solution is injected at the step length, the total injection amount (total liquid amount) is +.>The latest values of (a) are +.>Plus +.>I.e. +.>The accumulated injection amount of each affected well up to the current injection step is as follows:

m³。

7) And judging whether the total injection amount of the pressure flooding is finished.

The current injection step m=1, less than the total step=300, indicating that the implantation has not been completed, at which point m=m+1=2 is entered into the next step, repeating 3) to 6) until the current implantation step reaches the set implantation step 300.

Calculating driving standard parameters corresponding to the streamline regulator filling scheme according to the driving rates corresponding to all the communication areas of the effective oil wells, wherein the driving standard parameters specifically comprise:

calculating a driving rate average value according to the driving rates corresponding to all the communication areas of the effective oil wells;

calculating a driving rate standard deviation corresponding to the streamline regulator filling scheme according to the driving rate average value and driving rates corresponding to all the communication areas of the effective oil wells; the standard deviation of the driving rate is a driving standard parameter.

According toAfter the update is finished +.>Then, the numerical value calculation method is used to obtainFinal driving distance to each affected direction +.>Further calculate the driving rate in each direction +.>(i.e. the ratio of the final drive distance to the well distance) and calculating +.>Standard deviation of>The standard deviation is small, which indicates that the displacement along all directions is relatively balanced; the large standard deviation indicates that displacement in each direction is relatively unbalanced.

The calculation result of each parameter in case of each step of the scheme one is shown in table 2. In the table, "whether to add the streamline regulator" column, "1" means to add the streamline regulator, and "0" means to not add the streamline regulator.

Table 2 scheme one calculation result node table:

when step size m==300, indicating that the complete all-pressure-drive injection is completed, final +.>，/>，According to->Obtaining final->，/>，The method comprises the steps of carrying out a first treatment on the surface of the Further solving the driving rate:

。/>。/>. The average value of the drive rate is: />。

Standard deviation of drive rate (drive standard parameter):。

step six, setting a series of new initial streamline regulator filling schemes, and repeating the step five:

for comparison, the embodiment also provides schemes two to five, which are specifically as follows:

in the second scheme, no streamline regulator is added in the whole process.

Scheme three, mid (m=101 to 108) and late (m=201 to 207) are added twice together with the same amount (1500 m in) of flow line modulator solution as the scheme.

Scheme four, early (m=31 to 38) and mid (m=101 to 107) in total two additions of the flow line modulator solution in equal amounts (1500 mw) as the scheme.

Scheme five, independent of the cost of the agent, adds more doses (1900 m gauge) of the streamline modulator solution twice at early (m=31 to 42) and mid (m=101 to 107) times.

The calculation results of the parameters for each step of the above four schemes are shown in tables 3 to 6.

Table 3 scheme two calculation result node table:

table 4 scheme three calculation result node table:

table 5 scheme four calculation result node table:

table 6 scheme five calculation result node table:

solving the driving rate standard deviation of the scheme II, the scheme III, the scheme IV and the scheme V by using the method of the scheme I; the cumulative liquid amount, the driving distance, the driving rate and the standard deviation of the driving rate in each effective direction at the end of the pressure driving in the five schemes are summarized as shown in table 7.

Table 7 comparison of the results of the five protocol calculations:

step seven, the optimal streamline regulator filling scheme is preferably selected:

determining an optimal streamline regulator filling scheme according to driving standard parameters corresponding to all the streamline regulator filling schemes, wherein the method specifically comprises the following steps of: and selecting a streamline regulator filling scheme corresponding to the driving standard parameter with the minimum value as an optimal streamline regulator filling scheme.

Specifically: summarizing the drive rate in all flow line regulator filling schemesThe driving rate standard deviation (driving standard parameter) of the flow line regulator is the optimal flow line regulator filling scheme. The optimal streamline regulator filling scheme is +.>Is the least standard deviation of the solution +.>The standard deviation of (2) is small, which means that under the scheme, the injection well is uniformly driven to each affected oil well direction; if->The standard deviation of (2) reaches an ideal value of 0, indicating that under the scheme, injection is continued according to the displacement trend, and the injection front edge in each direction reaches each oil well at the same time. />

From the results in table 7, it can be seen that: (1) The standard deviation of the driving rate of the first scheme and the third scheme is smaller than that of the second scheme, which shows that the flow line regulator is added to drive the vehicle more uniformly than the single water injection pressure; (2) Under the condition of not exceeding the budget medicament cost (namely scheme one, scheme three and scheme four), the driving rate standard deviation of scheme four is minimum, namely, aiming at the well group, the streamline regulating agent solution is added twice in the early and middle stages of pressure driving, the streamline regulating effect is best, and the displacement is most balanced; (3) Compared with all schemes, the scheme five has the advantages of minimum standard deviation of drive rate and best streamline regulation effect, but exceeds the cost budget of the medicament, and is not adopted on site.

According to the scheme optimization method of the single-layer pressure-driving streamline regulator for the vertical and inclined well group, provided by the embodiment of the invention, the optimization scheme of the streamline regulator can be obtained only by a small amount of data which are very easy to obtain, so that the streamline regulator is guided to be reasonably used in the single-layer pressure-driving process of the vertical and inclined well group, and the pressure-driving effect is improved.

After the data of the reservoir development injection well is obtained, a space geometric model is abstracted from the communication areas of the injection well and each affected oil well, the total injection amount of the pressure drive is divided into small step sizes, the split amount, the drive distance and the drive rate of the injected liquid to each communication area are calculated by combining the performance characteristics of the streamline regulator, the injection front edge in each direction is uniformly driven to the affected oil well as an evaluation standard, and the optimal streamline regulator injection scheme is optimized. The method does not need complicated and time-consuming geologic modeling and oil reservoir numerical simulation processes involving a large amount of data, and can obtain an optimization scheme of the streamline regulator only by a small amount of data which is very easy to obtain, so as to guide the reasonable use of the streamline regulator in the single-layer pressure flooding process of the vertical and inclined well group and improve the pressure flooding effect.

Example 2:

the embodiment provides a straight inclined shaft well group single-layer pressure flooding streamline regulator filling scheme optimizing system, which comprises: the pressure flooding well group parameter acquisition module is used for acquiring the pressure flooding well group parameters of the target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise the porosity of a reservoir layer of the reservoir layer where the target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims

1. The method for optimizing the filling scheme of the single-layer-pressure flooding streamline regulator of the vertical and inclined well group is characterized by comprising the following steps of:

obtaining a pressure flooding well group parameter of a target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise reservoir porosity of a reservoir where a target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding;

Constructing a space geometric model of a communication area corresponding to the effective oil well based on well position coordinates of the injection well and each effective oil well, well distances between the effective oil well and the injection well and injection effective thickness between the injection well and the effective oil well; for the communication area corresponding to each effective oil well, the communication area corresponding to the effective oil well is a three-dimensional cake-shaped area taking the injection well as the center of a circle, taking the well distance between the injection well and the effective oil well as the radius as the upper surface, and taking the injection effective thickness of the injection well and the effective oil well as the heights of two sides; the central angle of the projection fan of the communication area is an included angle formed by two adjacent angular bisectors of the effective oil well; the adjacent angular bisector is an angular bisector of an included angle formed by the projection of a connecting line of the effective oil well and the injection well and a connecting line of the adjacent effective oil well and the injection well of the effective oil well; the height of the arc-shaped surface of the communication area is the injection effective thickness of the effective oil well;

for each initial streamline regulator filling scheme, filling simulation is carried out by setting injection step length based on the space geometric model, and driving rate corresponding to the communication area of each affected oil well is calculated according to the pressure flooding well group parameters of the target pressure flooding well group, the central angle of the projection sector of the communication area corresponding to the affected oil well and streamline regulator performance data; calculating driving standard parameters corresponding to the initial streamline regulator filling scheme according to driving rates corresponding to all the communication areas of the affected oil wells; the streamline regulator performance data comprise the influence area of the streamline regulator and the change amplitude of the streamline regulator on the permeability of the influence area; the total injection amount, the addition times and the addition time of the streamline regulator of each initial streamline regulator filling scheme are different; setting injection step length to be determined by the total injection amount of the pressure flooding;

2. The optimization method of the single-layer laminated flooding streamline regulator filling scheme of the straight inclined well group according to claim 1, wherein the calculation of the corresponding driving rate of the communication area of each affected well according to the parameters of the pressure flooding well group of the target pressure flooding well group, the central angle of the projection sector of the communication area corresponding to the affected well and the streamline regulator performance data specifically comprises the following steps:

calculating the space pore volume of each affected oil well according to the injection effective thickness of the injection well and the affected oil well, the central angle of a projection fan of a communication area corresponding to the affected oil well, the well spacing between the affected oil well and the injection well and the reservoir porosity;

calculating the injection front distance of the communication area of the affected oil well according to the space pore volume of the affected oil well, the pressure flooding well group parameters of the target pressure flooding well group and the streamline regulator performance data;

and calculating the driving rate corresponding to the communication area of the affected oil well according to the injection front distance of the communication area of the affected oil well and the well distance between the affected oil well and the injection well.

3. The method for optimizing a single-layer drive streamline regulator filling scheme for a vertical and inclined well group according to claim 2, wherein the method for calculating the injection front distance of the communication area of the affected well according to the space pore volume of the affected well and the streamline regulator performance data specifically comprises the following steps:

initializing the accumulated injection liquid amount, the accumulated injection streamline regulator solution amount, the injection front distance and the basic stratum coefficient of the communication area of the affected oil well; the basic stratum coefficient is determined by the small-layer permeability and the jet effective thickness of the injection well and the affected oil well;

calculating the real-time stratum coefficient of the affected oil well at the current injection step according to the accumulated injection streamline regulator solution amount of the last injection step, the space pore volume of the affected oil well and the streamline regulator performance data;

calculating the splitting component corresponding to the affected oil well of the current injection step according to the real-time stratum coefficient of the affected oil well of the current injection step;

calculating the accumulated injection liquid quantity of the communication area of the affected oil well after the current injection step length according to the split component corresponding to the affected oil well;

4. The method for optimizing the filling scheme of single-layer drive streamline regulator for the vertical and horizontal well group according to claim 3, wherein the method for calculating the split component corresponding to the affected oil well with the current injection step according to the real-time stratum coefficient of the affected oil well with the current injection step specifically comprises the following steps:

calculating the injection split coefficient corresponding to each effective oil well of the current injection step according to the real-time stratum coefficients of all the effective oil wells of the current injection step;

And calculating the split component corresponding to each effective oil well of the current injection step according to the injection split component corresponding to each effective oil well of the current injection step.

5. The optimization method of the single-layer flooding streamline regulator filling scheme of the vertical and inclined well group according to claim 3, wherein the calculation formula of the real-time stratum coefficient is as follows:

；

6. The optimization method of the single-layer-stacked-drive streamline regulator filling scheme of the straight inclined well group according to claim 1, wherein the driving standard parameters corresponding to the initial streamline regulator filling scheme are calculated according to the driving rates corresponding to the communication areas of all the affected wells, and specifically comprise the following steps:

Calculating a driving rate standard deviation corresponding to the initial streamline regulator filling scheme according to the driving rate average value and driving rates corresponding to all the communication areas of the effective oil wells; the standard deviation of the driving rate is a driving standard parameter.

7. The method for optimizing a single-layer drive streamline regulator filling scheme of a straight inclined well group according to claim 1, wherein the method for determining the optimal streamline regulator filling scheme according to drive standard parameters corresponding to all the initial streamline regulator filling schemes specifically comprises the following steps:

and selecting an initial streamline regulator filling scheme corresponding to the driving standard parameter with the minimum value as an optimal streamline regulator filling scheme.

8. The method for optimizing a single-layer flooding streamline regulator filling scheme for a vertical and horizontal well group according to claim 1, wherein the total flooding injection amount is determined by the development history of the target pressure flooding well group and the current stratum defect condition.

9. The method for optimizing a single-layer-drive streamline regulator filling scheme for a vertical and inclined well group according to claim 1, wherein the upper limit of the total injection amount of the streamline regulator is determined by the cost of the streamline regulator set for a target press-drive well group by an oil extraction plant.

10. A straight inclined well group single layer drive flow line modulator filling scheme optimization system, the system comprising:

the pressure flooding well group parameter acquisition module is used for acquiring the pressure flooding well group parameters of the target pressure flooding well group; the target pressure flooding well group comprises an injection well and a plurality of affected wells; the injection well and the affected oil well are vertical wells or inclined wells; the pressure driving layer is a single layer; the parameters of the pressure flooding well group comprise reservoir porosity of a reservoir where a target pressure flooding well group is located, well position coordinates of the injection well and each affected well, injection effective thickness of the injection well and each affected well, small-layer permeability of the injection well and each affected well, well distance between each affected well and the injection well and total injection quantity of pressure flooding;

the model construction module is used for constructing a space geometric model of a communication area corresponding to the effective oil well based on well position coordinates of the injection well and each effective oil well, well distances between the effective oil well and the injection well and injection effective thickness between the injection well and the effective oil well; for the communication area corresponding to each effective oil well, the communication area corresponding to the effective oil well is a three-dimensional cake-shaped area taking the injection well as the center of a circle, taking the well distance between the injection well and the effective oil well as the radius as the upper surface, and taking the injection effective thickness of the injection well and the effective oil well as the heights of two sides; the central angle of the projection fan of the communication area is an included angle formed by two adjacent angular bisectors of the effective oil well; the adjacent angular bisector is an angular bisector of an included angle formed by the projection of a connecting line of the effective oil well and the injection well and a connecting line of the adjacent effective oil well and the injection well of the effective oil well; the height of the arc-shaped surface of the communication area is the injection effective thickness of the effective oil well;

The driving standard parameter calculation module is used for carrying out filling simulation on each initial streamline regulator filling scheme based on the space geometric model by setting injection step length, and calculating the driving rate corresponding to the communication area of each affected oil well according to the pressure driving well group parameter of the target pressure driving well group, the central angle of the projection sector of the communication area corresponding to the affected oil well and the streamline regulator performance data; calculating driving standard parameters corresponding to the initial streamline regulator filling scheme according to driving rates corresponding to all the communication areas of the affected oil wells; the streamline regulator performance data comprise the influence area of the streamline regulator and the change amplitude of the streamline regulator on the permeability of the influence area; the total injection amount, the addition times and the addition time of the streamline regulator of each initial streamline regulator filling scheme are different; setting injection step length to be determined by the total injection amount of the pressure flooding;