CN110821458A - Injection allocation amount determination method, device and system for horizontal well three-dimensional well pattern - Google Patents
Injection allocation amount determination method, device and system for horizontal well three-dimensional well pattern Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The embodiment of the application discloses a method, a device and a system for determining injection allocation amount of a horizontal well three-dimensional well pattern, wherein the method comprises the steps of transforming a horizontal well three-dimensional well pattern model of a target work area to a complex plane by using a conformal transformation method to obtain a complex plane model; constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model; and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model. By utilizing the method and the device, the injection allocation amount of the horizontal well three-dimensional well pattern can be more accurately determined.
Description
Technical Field
The invention relates to the technical field of petroleum data processing, in particular to a method, a device and a system for determining injection allocation amount of a horizontal well three-dimensional well pattern.
Background
Dense oil means air permeability less than 1.0X 10-3μm2Or a permeability under pressure of less than 0.1X 10-3μm2The petroleum resources in reservoirs such as sandstone, siltstone, cloud rock, limestone and the like enjoy the reputation of black gold in the petroleum world. The dense oil and gas distribution is wide in the world, and according to statistics, the amount of unconventional oil and gas resources in the world is about 4 times of that of conventional oil and gas resources. The unconventional oil and gas exploration in China can be developed quite rapidly from the exploration geological reserves submitted from 2000 to 2010, the unconventional oil and gas exploration geological reserves are improved from 15% in 2000 to more than 70% in 2010, and the dense oil and the dense gas have great potential for future oil exploration in China.
In the middle and later stages of oil field development, some oil reservoirs are influenced by factors such as crude oil viscosity, oil-water viscosity ratio, reservoir heterogeneity, bottom water coning and the like, and the problems of uneven water absorption on the plane and the longitudinal direction of an oil reservoir, poor effect receiving condition of a production well, high water content rising speed and the like occur, so that the oil production is obviously reduced.
The horizontal well three-dimensional well pattern is a unique well pattern form that a vertical well and a horizontal well are jointly deployed in a thicker reservoir, and although the horizontal well three-dimensional well pattern supplements and perfects an original vertical well development system, an irregular well pattern is formed with the original vertical well, so that the problem of reasonable water injection distribution is caused. How to determine the reasonable injection amount of the irregular well pattern water well is a difficult problem for developing oil reservoirs by water injection.
Disclosure of Invention
The embodiment of the application aims to provide a method, a device and a system for determining the injection allocation amount of a horizontal well three-dimensional well pattern, which can more accurately determine the injection allocation amount of a compact reservoir horizontal well three-dimensional well pattern.
The method, the device and the system for determining the injection allocation amount of the horizontal well three-dimensional well pattern are realized by the following steps:
a method for determining injection allocation amount of a horizontal well three-dimensional well pattern comprises the following steps:
converting a horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal conversion method to obtain a complex plane model;
constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
In another embodiment provided by the method of the present specification, the determining a first injection allocation of a large injection water injection well and a second injection allocation of a small injection water injection well in a horizontal well vertical well pattern according to the injection-production differential pressure calculation model includes:
and determining a first injection allocation amount of a large-injection-amount water injection well and a second injection allocation amount of a small-injection-amount water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model based on the maximum reasonable injection-production differential pressure and the injection-production balance mechanism.
In another embodiment provided by the method described herein, the maximum sensible injection-production differential pressure is determined from a maximum sensible water injection well bottom stream pressure and a minimum sensible production well bottom stream pressure.
In another embodiment provided by the method described herein, the maximum sensible water injection well bottom hole flow pressure is determined according to the following:
piwfmax＝pf(1-X)
pf＝HmY
wherein p isiwfmaxMaximum reasonable water injection well bottom flowing pressure pfIndicating formation fracture pressure, HmIndicating the depth of the middle of the reservoir, X the probability of rupture,y represents the fracture pressure gradient.
In another embodiment provided by the method described herein, the minimum sensible production well bottom stream pressure is determined according to the following:
pwfimin＝pp+0.01γm(Hm-Hp)
γm＝γ0(1-fw)+γwfw
wherein p iswfiminRepresents the minimum reasonable production well bottom flow pressure, ppIndicates the reasonable pump port pressure, gamma, under different water contentsmRepresenting the relative density, H, of the mixed fluid in the wellbore of the production wellmIndicates the depth of the middle of the reservoir, HpIndicating pump hang depth, RsiIndicating the gas-oil ratio, β indicating the fill factor of the pump, fwIndicates the comprehensive water content, a indicates the natural gas solubility coefficient, gamma0Representing the relative density of oil, gamma, in the well bore of a production wellwRepresenting the relative density of water in the wellbore of the production well.
In another embodiment provided by the method of the present specification, the method further comprises:
determining a first injection allocation ratio of the large injection water injection well and the small injection water injection well according to development index data by using a numerical simulation method;
calculating the ratio of the first injection allocation amount to the second injection allocation amount to obtain a second injection allocation amount ratio;
and if the first injection allocation ratio and the second injection allocation ratio do not meet the preset condition, adjusting parameter data corresponding to the horizontal well three-dimensional well pattern model, and recalculating the first injection allocation ratio and the second injection allocation ratio.
The embodiment of the present specification further provides a device for determining injection allocation amount of a horizontal well three-dimensional well pattern, including:
the model transformation module is used for transforming the horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal transformation method to obtain a complex plane model;
the calculation model construction module is used for constructing an injection and production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and the injection allocation quantity determining module is used for determining a first injection allocation quantity of a large injection quantity water injection well and a second injection allocation quantity of a small injection quantity water injection well in the horizontal well three-dimensional well pattern according to the injection and production differential pressure calculation model.
In another embodiment provided by the apparatus described in this specification, the injection allocation determination module is further configured to determine, according to the injection-production differential pressure calculation model, a first injection allocation amount of a large-injection-amount water injection well and a second injection allocation amount of a small-injection-amount water injection well in the horizontal well three-dimensional well pattern based on a maximum reasonable injection-production differential pressure and an injection-production balance mechanism.
The embodiment of the present specification further provides a device for determining injection allocation amount of a horizontal well three-dimensional well pattern, which includes a processor and a memory for storing processor executable instructions, where the instructions, when executed by the processor, implement the following steps:
converting a horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal conversion method to obtain a complex plane model;
constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
The embodiments of the present specification further provide a system for determining injection allocation amount of a horizontal well three-dimensional well pattern, which includes at least one processor and a memory storing computer-executable instructions, where the processor implements the steps of the method according to any one of the above embodiments when executing the instructions.
According to the method, the device and the system for determining the injection allocation amount of the horizontal well three-dimensional well pattern, which are provided by one or more embodiments of the specification, an original plane horizontal well three-dimensional well pattern model of a target work area can be transformed to a complex plane by using a conformal transformation method, then the complex potential of any point of the complex plane can be calculated, and the injection allocation amount of the well pattern can be determined according to the complex potential of any point of the complex plane and the injection-production pressure difference between a water injection well and the midpoint of the horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort. In the drawings:
fig. 1 is a schematic flow chart of an embodiment of a method for determining injection allocation of a horizontal well three-dimensional well pattern provided in the present specification;
FIG. 2 is a schematic diagram of an original plane model of a three-dimensional well pattern of a horizontal well in one embodiment provided in the present specification;
FIG. 3 is a schematic view of a complex plane model of a horizontal well three-dimensional pattern in another embodiment provided in the present specification;
FIG. 4 is a graph showing the relationship between the degree of extraction and time in another embodiment provided in the present specification;
FIG. 5 is a graph showing the relationship between the daily oil production versus time in another embodiment provided in the present specification;
FIG. 6 is a graph showing a change of water content with respect to time according to another embodiment provided in the present specification;
fig. 7 is a schematic structural diagram of a module of an embodiment of a device for determining a filling amount of a horizontal well three-dimensional well pattern provided by the present specification.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in one or more embodiments of the present specification will be clearly and completely described below with reference to the drawings in one or more embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the specification, and not all embodiments. All other embodiments obtained by a person skilled in the art based on one or more embodiments of the present specification without making any creative effort shall fall within the protection scope of the embodiments of the present specification.
In the middle and later stages of development of a compact oil field, some oil reservoirs are influenced by factors such as crude oil viscosity, oil-water viscosity ratio, reservoir heterogeneity, bottom water coning and the like, and the problems of uneven water absorption on the plane and the longitudinal direction of the oil reservoir, poor effect receiving condition of a production well, high water content rising speed and the like occur, so that the oil production amount is obviously reduced and the like. In order to improve the overall development effect of such oil reservoirs, a horizontal well three-dimensional well pattern technology is generally adopted at present to solve the problems. Although the horizontal well three-dimensional well pattern supplements and improves the original vertical well development system, an irregular well pattern is formed with the original vertical well. Therefore, a method for calculating the injection allocation quantity of the three-dimensional well pattern of the compact reservoir horizontal well more effectively is urgently needed at present.
In order to solve the technical problem, an embodiment of the present application provides a method for determining injection allocation of a horizontal well three-dimensional well pattern, which may be implemented by transforming an original plane horizontal well three-dimensional well pattern model of a target work area onto a complex plane by using a conformal transformation method, then calculating a complex potential at any point of the complex plane, and determining the injection allocation of the well pattern according to the complex potential at any point of the complex plane and an injection-production pressure difference between a water injection well and a midpoint of a horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
Fig. 1 is a schematic flow chart of an embodiment of a method for determining injection allocation of a horizontal well three-dimensional well pattern provided in the specification. Although the present specification provides the method steps or apparatus structures as shown in the following examples or figures, more or less steps or modules may be included in the method or apparatus structures based on conventional or non-inventive efforts. In the case of steps or structures which do not logically have the necessary cause and effect relationship, the execution order of the steps or the block structure of the apparatus is not limited to the execution order or the block structure shown in the embodiments or the drawings of the present specification. When the described method or module structure is applied to a device, a server or an end product in practice, the method or module structure according to the embodiment or the figures may be executed sequentially or in parallel (for example, in a parallel processor or multi-thread processing environment, or even in an implementation environment including distributed processing and server clustering).
In a specific embodiment, as shown in fig. 1, in an embodiment of the method for determining a filling amount of a horizontal well three-dimensional well pattern provided in the present specification, the method may include:
s0: and transforming the horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal transformation method to obtain a complex plane model.
The horizontal well three-dimensional well pattern model can comprise an original plane well pattern model formed by projecting the arrangement data of the horizontal well vertical wells of the target work area to an original plane. The original plane may be a plane including a cartesian coordinate system, and the complex plane may include a plane formed by converting data in the cartesian coordinate system into complex numbers.
In some embodiments, the target work area well pattern can be determined according to preset well pattern parameters such as the form type, the distribution type, the well arrangement direction, the horizontal section length, the well spacing, the row spacing, the eccentricity and the like of the well pattern, the spacing of reservoir fractures and the seam arrangement mode, and then a horizontal well three-dimensional well pattern model of the target work area is further constructed.
In one implementation scenario of the present description, a yellow 20 well region is selected as a target work area. By considering the reservoir characteristics of the well regions, a block model with the area of 2000m multiplied by 2000m is established, the grid step length is selected to be 10.0m multiplied by 5.0m, and the total grid number is 120000. Other basic parameters of reservoir numerical simulation are shown in table 1. During the numerical simulation, the fluid properties of the reservoir may be quantified in advance for research needs. The high pressure physical parameters include high pressure physical properties of live oil, dry gas and formation water. The PVT data used in the model were obtained from high pressure physical property tests of the yellow 20 well region, and the specific data are shown in table 2. The development current situation of the tight oil reservoir horizontal well of the Changqing oil field and the superposition development characteristics of multiple oil layers are comprehensively considered, a vertical well water injection horizontal well oil extraction development mode is adopted, two sets of oil layers share one set of water injection well pattern, and the horizontal well is exploited in a layered mode, so that a horizontal well three-dimensional well pattern is formed. Because the local mutual overlapping intercommunication of 6 river sand bodies of length in the northwest of the Ji tableland, the interlayer development is thinner, and the field development adopts the well spacing mode that upper and lower two sets of oil reservoir horizontal well planes stagger each other for avoiding two sets of oil reservoirs in the vertical direction because the fracturing of segmentation multicluster produces the interference. However, the horizontal well arrangement mode of the horizontal well leads to the fact that the upper horizontal well is not positioned in the center of the water injection development well pattern, and the reasonable injection allocation amount of each water injection well in the upper layer of the horizontal well three-dimensional well pattern needs to be optimized and calculated, so that the problems of uneven water absorption on the oil layer plane and the longitudinal direction, poor effect condition of the production well, high water content rising speed and the like are avoided, and the oil production amount is obviously reduced.
TABLE 1 yellow 20 well Length 62 formation and fluid parameters
| Horizon | Length 62 |
| Depth of oil layer, m | 2488 |
| Average effective thickness, m | 16 |
| Average porosity of the formation,% | 10.1 |
| Average permeability of the formation, 10-3μm2 | 0.59 |
| Crude oil density at ground level, g/cm3 | 0.854 |
| Formation crude oil density, g/cm3 | 0.726 |
| Original formation pressure, MPa | 15.8 |
| Formation pressure gradient, MPa/100m | 0.74 |
| Reservoir temperature,. degree.C | 68.9 |
| Volume coefficient of crude oil | 1.27 |
| Original oil saturation degree% | 62 |
| Formation crude oil viscosity, mPa s | 6.4 |
| Freezing point, DEG C | 22 |
| Saturation pressure, MPa | 11.35 |
| Original gas-oil ratio, m3/t | 114.6 |
TABLE 2 crude oil high pressure physical property data table
By analyzing various parameters of a target work area, a horizontal well staggered well arrangement mode is preferably adopted in the implementation scene, an upper oil layer presents an irregular five-point well pattern, the well arrangement direction is perpendicular to the direction of the maximum main stress, the length of a horizontal section is 600m, a spindle-shaped seam arrangement mode is adopted, the interval between artificial fracturing fractures is 50m, the well spacing is 600m, the row spacing is 150m, and the eccentricity of a horizontal well is 100 m. The permeability of the physical property parameter is 0.59 multiplied by 10-3μm2The viscosity of the crude oil in the stratum takes 6.4 mPa.s, and the thickness of the reservoir is 10.2 m. Production status horizontal well production was set at 48m 3/d. And constructing an original plane well pattern model of an upper oil layer of the target work area by using the parameters, as shown in figure 2. Fig. 2 shows a schematic diagram of an original plane model of a three-dimensional well pattern of an upper oil layer horizontal well. Wherein, 1, 2, 3 and 4 are positions of the center of the water injection vertical well in the original plane; 1. the No. 2 water injection well is far away from the horizontal well and is a large injection quantity water injection well, and the water injection quantity is the same; 3. the No. 4 water injection well is close to the horizontal well and is a water injection well with small injection amount, and the water injection amount is the same; 5. 7 represents the up-down position of the drainage gallery; and 6 denotes the origin. a is a well spacing; b is a row pitch; d is horizontal well eccentricity.
In some embodiments, each point on the original plane may be transformed to the complex plane by a transformation function using a conformal transformation method to form a semi-infinite-length belt-shaped flow region with a width of pi on the complex plane, and the liquid discharge gallery with the width of pi represents a horizontal well, and the injected water flows from the water injection well to the liquid discharge gallery. For the original plane well pattern model shown in fig. 2, the complex plane may be coordinated by using a conformal transformation method to obtain the complex plane model shown in fig. 3.
In some embodiments, the coordinate transformation function may be expressed as:
z＝Lchζ (1)
where z represents the original plane, ζ represents the complex plane, and ch represents a hyperbolic sine function.
When z is x + iy, ζ is ξ + i η is substituted into formula (1), the following can be obtained:
x+iy＝Lch(ξ+iη)＝L(chξcosη+ishξsinη) (2)
wherein x and y represent horizontal and vertical coordinates of an original plane coordinate system, ξ and η represent horizontal and axial coordinates of a complex plane, L represents half-length of a horizontal section of a horizontal well, i represents an imaginary unit, and sh represents a hyperbolic cosine function.
According to the formula (2), the following corresponding relationship can be obtained:
wherein:
the complex plane coordinates of point 1 are:
the complex plane coordinates of the 2 points are:
ξ2＝ξ1
η2＝π-η1
the complex plane coordinates of the 3 points are:
the complex plane coordinates of the 4 points are:
ξ4＝ξ3
η4＝π-η3
the complex plane coordinates of the 5 points are:
ξ5＝0
η5＝π
the complex plane coordinates of the 6 points are:
ξ6＝0
the complex plane coordinates of the 7 points are:
ξ7＝0
η7＝0
wherein, in the coordinates: a is a well spacing; b is a row pitch; d is horizontal well eccentricity.
The coordinates of each point of the original plane are subjected to coordinate transformation through a formula (3) to obtain complex plane coordinates shown in a table 3. Through the mapping of the special sampling points in table 3, a complex plane well pattern model schematic diagram corresponding to the target work area is obtained, and the diagram is shown in fig. 3. Fig. 3 is a schematic view of a three-dimensional horizontal well pattern complex plane model in another embodiment provided in the present specification.
TABLE 3 before and after conformal transformation sampling point mapping relation table
S2: and constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model.
When the original plane irregular five-point well pattern can be transformed into the zonal stratum with the complex plane width of pi by using the transformation function in the step S0, two symmetrically arranged water injection wells (1, 2, 3, 4) respectively distributed on two sides of the ordinate flow to the liquid discharge gallery, wherein the coordinates of the 1 and 2 wells are (ξ)1，η1) And (ξ)1，π-η1) The distribution of potentials generated by the two wells at any point (ξ) can be expressed as:
wherein q represents the injection amount of the water injection well.
The potential that the water injection well produced takes the positive value, and the potential that the production well produced takes the negative value, through the complex potential stack, can determine that the complex potential computational expression of whole complex plane both sides arbitrary point (ξ) department is:
wherein q is1Denotes the injection amount of the 1-point injection well, q3The injection amount of the 3-point injection well is shown.
Further, the relation between the radius of the water injection well of the original plane and the radius of the water injection well of the complex plane can be determined as follows:
where ρ iswIndicating the radius of the injection well in the complex plane, rwDenotes the radius of the injection well on the original plane, ξ0Represents Z0The abscissa of the point in the complex plane, η, corresponding to the point0Represents Z0The ordinate, Z, of the point corresponding to the point in the complex plane0Representing the origin of coordinates of the original plane.
Then, an injection-production differential pressure expression of the horizontal section axial midpoint of the large injection quantity No. 1 water injection well and the horizontal well can be constructed according to the complex potential of the large injection quantity No. 1 water injection well, and a point (ξ) at the well wall of 1 well is taken1-ρw,η1)，ρwFor a radius of 1 well on the ζ plane, the complex potential at this point can be expressed as:
in the expression (9), the constant C is the complex potential of the liquid drainage gallery (ξ -0), so that the injection and production pressure is injected and produced at the midpoint of the axial line of the horizontal section of the 1 well and the horizontal wellDifference Δ p1Can be expressed as:
where μ represents the formation crude oil viscosity and K represents the formation average permeability.
S4: and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
The injection-production differential pressure calculation model determined in the step S2 may be used to determine a first injection allocation amount of the large injection water injection well and a second injection allocation amount of the small injection water injection well in the horizontal well three-dimensional well pattern in combination with various parameters of the horizontal well three-dimensional well pattern.
The original plane horizontal well three-dimensional well pattern model of the target work area is transformed to the complex plane by using a conformal transformation method, and the liquid drainage gallery in the semi-infinite long zonal formation represents a horizontal well, so that the irregular horizontal well three-dimensional well pattern is transformed to the zonal formation on the complex plane, and the water injection well can be considered to flow to the liquid drainage gallery. The potential produced by the injection well at any location can then be calculated and further calculated to determine the complex potential at any point of the complex plane. And then, determining the injection allocation amount of the horizontal well three-dimensional well pattern of the target work area according to the complex potential at any point of the complex plane and the injection-production pressure difference between the water injection well and the midpoint of the horizontal well, so that the accuracy of determining the injection allocation amount of the irregular horizontal well three-dimensional well pattern can be improved.
In another embodiment of the present description, a maximum reasonable injection-production pressure difference and an injection-production balance mechanism may be further analyzed in combination, and a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in a horizontal well three-dimensional well pattern are determined according to the injection-production pressure difference calculation model based on the maximum reasonable injection-production pressure difference and the injection-production balance mechanism.
Under the existing well pattern and process conditions, a maximum reasonable injection-production pressure difference exists, which can not only ensure the balance of oil reservoir injection-production, but also meet the requirement of realizing the maximum liquid discharge. In some embodiments, the maximum sensible injection and production pressure differential may be determined by both a maximum sensible water injection well bottom stream pressure and a minimum sensible production well bottom stream pressure.
Wherein, the maximum reasonable water injection well bottom flow pressure can be the water injection well bottom flow pressure p which can not only fully meet the water injection requirement, but also minimize the probability that the stratum is crushediwfmaxThe expression may be:
piwfmax＝pf(1-X) (11)
pf＝HmY (12)
wherein p isfIndicating formation fracture pressure, HmRepresents the depth of the middle of the reservoir, X represents the fracture probability, and Y represents the fracture pressure gradient.
The minimum reasonable production well bottom flowing pressure pwfiminNot only the lower pump depth, but also the change of the water content, and the expression can be:
pwfimin＝pp+0.01γm(Hm-Hp) (13)
γm＝γ0(1-fw)+γwfw(15)
wherein p ispIndicates the reasonable pump port pressure, gamma, under different water contentsmRepresenting the relative density, H, of the mixed fluid in the wellbore of the production wellmIndicates the depth of the middle of the reservoir, HpIndicating pump hang depth, RsiIndicating the gas-oil ratio, β indicating the fill factor of the pump, fwIndicates the comprehensive water content, a indicates the natural gas solubility coefficient, gamma0Representing the relative density of oil, gamma, in the well bore of a production wellwRepresenting the relative density of water in the wellbore of the production well.
According to the comprehensive water content, the depth of the middle part of the oil layer, the pump hanging depth, the gas-oil ratio, the filling coefficient of the pump, the natural gas solubility coefficient, the relative density of oil in the shaft of the production well and the production wellThe relative density of water in the shaft, the stratum fracture pressure, the fracture probability and the fracture pressure gradient can be calculated by a formula (11) to obtain the maximum reasonable shaft bottom flowing pressure of the vertical water injection well, and a formula (13) to obtain the minimum reasonable shaft bottom flowing pressure of the horizontal production well, so as to obtain the difference between the maximum reasonable shaft bottom flowing pressure of the water injection well and the minimum reasonable shaft bottom flowing pressure of the horizontal production well, namely the maximum reasonable injection-production pressure difference delta Pmax。
In some embodiments, the injection and production balance mechanism may be set such that the total injection amount is equal to the total production amount. According to the integral injection-production balance mechanism of the well group, the method comprises the following steps:
wherein q ishIndicating the total injection amount of the water injection well.
Injection-production differential pressure delta P between water injection well with large injection quantity No. 1 and horizontal well horizontal section axis midpoint1＝ΔPmaxCombining the yield of the horizontal well, the formula (10) and the formula (16) solve that the injection rate of the water injection well No. 1 (No. 2) is 16.69m3/d, the injection rate of the water injection well No. 3 (No. 4) is 7.31m3/d, and the ratio of the injection rates of the large injection well and the small injection well is about 2: 1.
In other embodiments of the present description, the reasonability of the obtained injection amount of the water injection well may be verified by combining with a numerical simulation method, and the injection allocation amount of the vertical well water injection horizontal well oil production irregular five-point well pattern water injection well is determined according to the verification result. In some embodiments, the method may further comprise:
determining a first injection allocation ratio of the large injection water injection well and the small injection water injection well according to development index data by using a numerical simulation method;
calculating the ratio of the first injection allocation amount to the second injection allocation amount to obtain a second injection allocation amount ratio;
and if the first injection allocation ratio and the second injection allocation ratio do not meet the preset condition, adjusting various parameter data corresponding to the horizontal well three-dimensional well pattern model, and recalculating the first injection allocation ratio and the second injection allocation ratio.
On the premise that the total injection amount is fixed, for production schemes corresponding to injection allocation ratio value data of different large injection wells and small injection wells, various development indexes of the schemes after 20 years of production can be analyzed and compared by combining a numerical simulation method, and the optimal injection allocation ratio value is optimized to verify the injection amount of the water injection wells obtained according to theoretical calculation. Wherein, the development indexes can comprise the extraction degree, the daily oil production, the water content, the single well cumulative yield and the like. If the preferred result corresponds to the calculated result, the calculated injection volume of the water injection wells can be directly determined as the injection volume of each water injection well of the well pattern. If the preferred result is not accordant with the calculated result, the parameter data of the well pattern can be readjusted, and the first injection allocation amount and the second injection allocation amount are calculated by the scheme of the steps S0-S4, so that the reasonability and the accuracy of the injection allocation calculation result are further ensured.
Under the premise that the total injection amount is certain, namely the yield of the horizontal well is fixed, the injection allocation amount ratio of a large injection well to a small injection well is designed to be respectively as follows: 1:1, 2:1, 3:1, 4:1, 5:1 and 7:1, and obtaining a schematic diagram of the variation relationship curve of the production degree, the daily oil production and the water content corresponding to the injection allocation ratio of the 6 large-injection-amount water outlet well and the small-injection-amount water injection well relative to time through numerical simulation, as shown in fig. 4, 5 and 6. FIG. 4 is a graph showing the relationship between the production rate and the time for different injection ratios; FIG. 5 is a graph showing the relationship between the daily oil phase and the time for different injection ratios; FIG. 6 is a graph showing the variation of water content with respect to time for different dispensing ratios.
Through comparative analysis, the injection allocation ratio of the large injection well and the small injection well of the irregular five-point well pattern is preferably about 2:1, and because the ratio is high in production degree and relatively low in water content, the best development effect is achieved. That is, the preferred injection allocation ratio is in accordance with the result calculated according to the formula, the calculated injection amount of the water injection well can be directly determined as the injection allocation amount of each water injection well of the well pattern. In summary, on the premise that the total injection amount is constant, when two sets of oil layer superimposed development reservoirs are developed by adopting a horizontal well three-dimensional well pattern, the injection amount of the large injection amount No. 1 (No. 2) water injection well of the upper oil layer irregular five-point well pattern is 16.69m3/d, the injection amount of the small injection amount No. 3 (No. 4) water injection well is 7.31m3/d, and the ratio of the injection amounts of the large injection well and the small injection well is about 2: 1.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For details, reference may be made to the description of the related embodiments of the related processing, and details are not repeated herein.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
According to the method for determining the injection allocation amount of the horizontal well three-dimensional well pattern, a liquid discharge gallery in a semi-infinite strip stratum can replace a horizontal well, an original plane horizontal well three-dimensional well pattern model of a target work area is transformed to a complex plane by using a conformal transformation method, and the complex potential of any point of the complex plane is calculated. And then, iteratively calculating and determining the injection amount of the well pattern according to the complex potential at any point of the complex plane and the injection-production differential pressure between the water injection well and the midpoint of the horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
Based on the determination of the downward migration depth of the oil, one or more embodiments of the present disclosure further provide a device for determining the injection allocation amount of the horizontal well three-dimensional well pattern. The apparatus may include systems, software (applications), modules, components, servers, etc. that utilize the methods described in the embodiments of the present specification in conjunction with hardware implementations as necessary. Based on the same innovative conception, embodiments of the present specification provide an apparatus as described in the following embodiments. Since the implementation scheme of the apparatus for solving the problem is similar to that of the method, the specific implementation of the apparatus in the embodiment of the present specification may refer to the implementation of the foregoing method, and repeated details are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Specifically, fig. 7 is a schematic block structure diagram of an embodiment of a device for determining a filling amount of a horizontal well three-dimensional well pattern provided in this specification, and as shown in fig. 7, the device may include:
the model transformation module 102 may be configured to transform a horizontal well pattern model of the target work area to a complex plane by using a conformal transformation method, so as to obtain a complex plane model;
the calculation model construction module 104 can be used for constructing an injection and production differential pressure calculation model of the middle point of the axis of the horizontal section of the high injection water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and the injection allocation quantity determining module 106 may be configured to determine a first injection allocation quantity of the large injection quantity water injection well and a second injection allocation quantity of the small injection quantity water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
In other embodiments of the present description, the injection allocation amount determining module may be further configured to determine, according to the injection-production differential pressure calculation model, a first injection allocation amount of a large-injection-amount water injection well and a second injection allocation amount of a small-injection-amount water injection well in the horizontal well three-dimensional well pattern based on a maximum reasonable injection-production differential pressure and an injection-production balance mechanism.
In other embodiments of the present description, the apparatus may further include:
the optimal injection allocation determination module is used for determining a first injection allocation ratio of the large injection water injection well and the small injection water injection well according to the development index data by using a numerical simulation method;
and the parameter adjusting module is used for calculating the ratio of the first injection allocation amount to the second injection allocation amount to obtain a second injection allocation amount ratio, and if the ratio of the first injection allocation amount to the second injection allocation amount does not meet a preset condition, adjusting various parameter data corresponding to the horizontal well three-dimensional well pattern model, and recalculating the first injection allocation amount and the second injection allocation amount.
It should be noted that the above-described apparatus may also include other embodiments according to the description of the method embodiment. The specific implementation manner may refer to the description of the related method embodiment, and is not described in detail herein.
According to the injection allocation amount determining device for the horizontal well three-dimensional well pattern, provided by one or more embodiments of the specification, a liquid discharge gallery in a semi-infinite strip-shaped stratum can replace a horizontal well, an original plane horizontal well three-dimensional well pattern model of a target work area is transformed to a complex plane by using a conformal transformation method, and the complex potential of any point of the complex plane is calculated. And then, iteratively calculating and determining the injection amount of the well pattern according to the complex potential at any point of the complex plane and the injection-production differential pressure between the water injection well and the midpoint of the horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
The method or apparatus provided by the present specification and described in the foregoing embodiments may implement service logic through a computer program and record the service logic on a storage medium, where the storage medium may be read and executed by a computer, so as to implement the effect of the solution described in the embodiments of the present specification. Accordingly, the present specification also provides a device for determining a filling amount of a horizontal well three-dimensional well pattern, comprising a processor and a memory storing processor-executable instructions, wherein the instructions, when executed by the processor, implement steps comprising:
converting a horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal conversion method to obtain a complex plane model;
constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
The storage medium may include a physical device for storing information, and typically, the information is digitized and then stored using an electrical, magnetic, or optical media. The storage medium may include: devices that store information using electrical energy, such as various types of memory, e.g., RAM, ROM, etc.; devices that store information using magnetic energy, such as hard disks, floppy disks, tapes, core memories, bubble memories, and usb disks; devices that store information optically, such as CDs or DVDs. Of course, there are other ways of storing media that can be read, such as quantum memory, graphene memory, and so forth.
It should be noted that the above-described apparatus may also include other embodiments according to the description of the method embodiment. The specific implementation manner may refer to the description of the related method embodiment, and is not described in detail herein.
According to the injection allocation amount determining device for the horizontal well three-dimensional well pattern, a liquid discharge gallery in a semi-infinite strip stratum can replace a horizontal well, an original plane horizontal well three-dimensional well pattern model of a target work area is converted to a complex plane by using a conformal conversion method, and the complex potential of any point of the complex plane is calculated. And then, iteratively calculating and determining the injection amount of the well pattern according to the complex potential at any point of the complex plane and the injection-production differential pressure between the water injection well and the midpoint of the horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
The specification also provides a system for determining the injection allocation amount of the horizontal well three-dimensional well pattern, wherein the system can be a single system for determining the injection allocation amount of the horizontal well three-dimensional well pattern, and can also be applied to various types of petroleum data processing or explaining and evaluating systems. The system may be a single server, or may include a server cluster, a system (including a distributed system), software (applications), an actual operating device, a logic gate device, a quantum computer, etc. using one or more of the methods or one or more of the example devices of the present specification, in combination with a terminal device implementing hardware as necessary. The system for determining the injection allocation amount of the horizontal well three-dimensional well pattern can comprise at least one processor and a memory for storing computer executable instructions, wherein the processor executes the instructions to realize the steps of the method in any one or more of the above embodiments.
It should be noted that the above-mentioned system may also include other implementation manners according to the description of the method or apparatus embodiment, and specific implementation manners may refer to the description of the related method embodiment, which is not described in detail herein.
According to the injection allocation amount determining system for the horizontal well three-dimensional well pattern, a liquid discharge gallery in a semi-infinite long strip-shaped stratum can replace a horizontal well, an original plane horizontal well three-dimensional well pattern model of a target work area is converted to a complex plane by using a conformal transformation method, and the complex potential of any point of the complex plane is calculated. And then, iteratively calculating and determining the injection amount of the well pattern according to the complex potential at any point of the complex plane and the injection-production differential pressure between the water injection well and the midpoint of the horizontal well. By utilizing the method and the device, the injection allocation amount of the three-dimensional well pattern of the horizontal well of the compact reservoir can be determined more accurately.
It should be noted that, the above-mentioned apparatus or system in this specification may also include other implementation manners according to the description of the related method embodiment, and a specific implementation manner may refer to the description of the method embodiment, which is not described herein in detail. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class, storage medium + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant points, refer to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a vehicle-mounted human-computer interaction device, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, when implementing one or more of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, etc. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element.
As will be appreciated by one skilled in the art, one or more embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, one or more embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, one or more embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
One or more embodiments of the present description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. One or more embodiments of the present specification can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description of the specification, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for determining injection allocation amount of a horizontal well three-dimensional well pattern is characterized by comprising the following steps:
converting a horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal conversion method to obtain a complex plane model;
constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
2. The method according to claim 1, wherein the determining a first injection allocation of a large injection water injection well and a second injection allocation of a small injection water injection well in a horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model comprises:
and determining a first injection allocation amount of a large-injection-amount water injection well and a second injection allocation amount of a small-injection-amount water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model based on the maximum reasonable injection-production differential pressure and the injection-production balance mechanism.
3. The method of claim 2, wherein the maximum sensible injection-production differential pressure is determined from a maximum sensible water injection well bottom stream pressure and a minimum sensible production well bottom stream pressure.
4. The method of claim 3, wherein the maximum sensible water injection well bottom stream pressure is determined according to the following:
piwfmax＝pf(1-X)
pf＝HmY
wherein p isiwfmaxRepresents the maximum reasonable water injection well bottom flow pressure pfIndicating formation fracture pressure, HmRepresents the depth of the middle of the reservoir, X represents the fracture probability, and Y represents the fracture pressure gradient.
5. The method of claim 3, wherein the minimum sensible production well bottom stream pressure is determined according to:
pwfimin＝pp+0.01γm(Hm-Hp)
γm＝γ0(1-fw)+γwfw
wherein p iswfiminRepresents the minimum reasonable production well bottom flow pressure, ppIndicates the reasonable pump port pressure, gamma, under different water contentsmRepresenting the relative density, H, of the mixed fluid in the wellbore of the production wellmIndicates the depth of the middle of the reservoir, HpIndicating pump hang depth, RsiIndicating the gas-oil ratio, β indicating the fill factor of the pump, fwTo representComprehensive water content, a represents the natural gas solubility coefficient, gamma0Representing the relative density of oil, gamma, in the well bore of a production wellwRepresenting the relative density of water in the wellbore of the production well.
6. The method of claim 1, further comprising:
determining a first injection allocation ratio of the large injection water injection well and the small injection water injection well according to development index data by using a numerical simulation method;
calculating the ratio of the first injection allocation amount to the second injection allocation amount to obtain a second injection allocation amount ratio;
and if the first injection allocation ratio and the second injection allocation ratio do not meet the preset condition, adjusting parameter data corresponding to the horizontal well three-dimensional well pattern model, and recalculating the first injection allocation ratio and the second injection allocation ratio.
7. A device for determining injection allocation amount of a horizontal well three-dimensional well pattern is characterized by comprising:
the model transformation module is used for transforming the horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal transformation method to obtain a complex plane model;
the calculation model construction module is used for constructing an injection and production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and the injection allocation quantity determining module is used for determining a first injection allocation quantity of a large injection quantity water injection well and a second injection allocation quantity of a small injection quantity water injection well in the horizontal well three-dimensional well pattern according to the injection and production differential pressure calculation model.
8. The device of claim 7, wherein the injection allocation determination module is further configured to determine a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model based on a maximum reasonable injection-production differential pressure and an injection-production balance mechanism.
9. An injection allocation determination device for a horizontal well three-dimensional well pattern, which is characterized by comprising a processor and a memory for storing processor-executable instructions, wherein the instructions when executed by the processor realize the following steps:
converting a horizontal well three-dimensional well pattern model of the target work area to a complex plane by using a conformal conversion method to obtain a complex plane model;
constructing an injection-production differential pressure calculation model of the middle point of the axis of the horizontal section of the high-injection-rate water injection well and the horizontal well according to the complex potential at any point in the complex plane model;
and determining a first injection allocation amount of a large injection water injection well and a second injection allocation amount of a small injection water injection well in the horizontal well three-dimensional well pattern according to the injection-production differential pressure calculation model.
10. A system for determining the injection allocation of a horizontal well profile, comprising at least one processor and a memory storing computer executable instructions, which when executed by the processor, implement the steps of the method according to any one of claims 1 to 6.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95109767A (en) * | 1995-06-13 | 1997-05-20 | Внедренческий научно-исследовательский инженерный центр "Нефтегазтехнология" | Method for development of multiple-bed deposit by system of horizontal wells |
| RU2215128C1 (en) * | 2002-10-03 | 2003-10-27 | Закиров Сумбат Набиевич | Method of development of oil field with nonuniform reservoirs and difficultly recoverable oil reserves |
| CN1517510A (en) * | 2003-01-13 | 2004-08-04 | 大庆油田有限责任公司 | Method for hierarchical regulating water flow of water injection well in oil field |
| CN104141481A (en) * | 2013-05-06 | 2014-11-12 | 中国石油天然气股份有限公司 | Well spacing method of ultralow-permeability tight-oil reservoir horizontal well |
| CN105626036A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield |
-
2019
- 2019-10-31 CN CN201911051952.5A patent/CN110821458A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95109767A (en) * | 1995-06-13 | 1997-05-20 | Внедренческий научно-исследовательский инженерный центр "Нефтегазтехнология" | Method for development of multiple-bed deposit by system of horizontal wells |
| RU2215128C1 (en) * | 2002-10-03 | 2003-10-27 | Закиров Сумбат Набиевич | Method of development of oil field with nonuniform reservoirs and difficultly recoverable oil reserves |
| CN1517510A (en) * | 2003-01-13 | 2004-08-04 | 大庆油田有限责任公司 | Method for hierarchical regulating water flow of water injection well in oil field |
| CN104141481A (en) * | 2013-05-06 | 2014-11-12 | 中国石油天然气股份有限公司 | Well spacing method of ultralow-permeability tight-oil reservoir horizontal well |
| CN105626036A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield |
Non-Patent Citations (3)
| Title |
|---|
| 于金萍: "水平井与直径联合部井不规则井网水井配注量的确定方法研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
| 孙哲: "水平井与直井不规则井网水平井注聚合理配注量的确定方法", 《第二十五届全国水动力学学术会议暨第十二届全国水动力学研讨会文集》 * |
| 高本成等: "不规则井网水平井配注量的确定", 《第九届全国水动力学学术会议暨第二十二届全国水动力学研讨会文集》 * |
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Application publication date: 20200221 |