CN106097132B - Method and device for determining pump-down depth of multilayer oil reservoir - Google Patents
Method and device for determining pump-down depth of multilayer oil reservoir Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 23
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Abstract
The application provides a method and a device for determining pump-down depth of a multilayer oil reservoir. And then determining the initial lower pump depth of the oil well pump according to at least one first target oil layer and a second preset rule. And then acquiring oil layer parameters of a first target oil layer from the oil reservoir, acquiring theoretical suction percentage of each oil layer in the first target oil layer according to the oil layer parameters, and adjusting the initial pump-lowering depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump-lowering depth of the oil well pump. The method and the device for determining the pump-down depth of the multilayer oil reservoir can be used for putting an oil well pump down at the accurate position of a production well, so that the lifting efficiency of crude oil is improved.
Description
Technical Field
The application belongs to the technical field of oil exploitation, and particularly relates to a method and a device for determining pump-down depth of a multilayer oil reservoir.
Background
Multilayer oil deposits produce a large amount of hot tail gas in the formation during fireflooding, which is typically removed from the formation by a production well. An oil pump is typically provided within the production well to lift the crude oil produced in the in situ combustion to the surface.
Because the hot exhaust gas is produced at different levels, the hot exhaust gas is generally moved upwards. Therefore, if the oil well pump in the production well is located above the hot tail gas generation layer or the hot tail gas generation layer, the oil well pump in the production well is likely to suck the hot tail gas to generate air resistance, and further the pump efficiency of the oil well pump is directly influenced.
Currently, the determination of the pump depth under a multi-layer oil reservoir is generally determined according to an oil reservoir gas production profile testing technology. However, the method is not accurate, and the position of the hot tail gas cannot be determined, so that the pumping efficiency of the oil well pump is reduced, and the energy of the system is wasted. Therefore, a new method for determining the pump-down depth is needed for a multi-layer oil reservoir to reduce the influence of the hot tail gas on the pump efficiency and improve the lifting efficiency of the oil well pump.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method and a device for determining the pump-down depth of a multilayer oil reservoir, which can put an oil well pump down at an accurate position of a production well and improve the lifting efficiency of crude oil.
The specific technical scheme of the invention is as follows:
the invention provides a method for determining the pump depth under a multilayer oil reservoir, which comprises the following steps:
acquiring a geological communication grid diagram of an oil reservoir;
determining at least one first target oil layer according to the geological communication grid-shaped graph and a first preset rule;
determining the initial pump lowering depth of the oil well pump according to the at least one first target oil layer and a second preset rule;
acquiring oil layer parameters of the first target oil layer in the oil reservoir, and acquiring theoretical suction percentages of all oil layers in the first target oil layer according to the oil layer parameters;
and adjusting the initial pump lowering depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump lowering depth of the oil well pump.
In one embodiment, the first predetermined rule is: and determining a reservoir which can be communicated from the injection well to the production well as a first target reservoir.
In one embodiment, the second predetermined rule is: and (4) putting the oil well pump below the first target oil layer close to the bottom of the well.
In one embodiment, the theoretical percent imbibition for each of the reservoirs is calculated according to the following equation:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;and the weight correction value is expressed as the nth reservoir parameter of the ith reservoir.
In one embodiment, the weight correction value is calculated according to the following formula:
wherein,a weight correction value representing a jth reservoir parameter for an ith reservoir; y isjiA j oil layer parameter representing an ith oil layer, wherein i is a positive integer from 1 to m, and j is a positive integer from 1 to n; n represents the number of reservoir parameters,denotes the mean value of the jth reservoir parameter of the ith reservoir, ajRepresenting the weight of the jth reservoir parameter.
In one embodiment, the number of the reservoir parameters is 4, and the 4 reservoir parameters are respectively: depth, thickness, porosity, and permeability of the reservoir.
In one embodiment, the first target oil layer includes a first sub-oil layer with a theoretical inhalation percentage less than a threshold value and a second sub-oil layer with a theoretical inhalation percentage not less than the threshold value, and accordingly, the third predetermined rule is: a second sub-reservoir of the first target reservoir located closest to a downhole location is identified.
In one embodiment, the pump is lowered below the second sub-layer closest to the downhole location.
In addition, the invention also provides a device for determining the pump depth under the multilayer oil reservoir, which comprises:
an acquisition module configured to acquire a geosynclinal grid of an oil reservoir;
a first determination module configured to determine at least one first target reservoir according to a first predetermined rule based on the geosynclinal grid;
a second determination module configured to determine an initial pump-down depth of the oil-well pump according to a second predetermined rule based on the at least one first target oil layer;
an obtaining module configured to obtain reservoir parameters of the first target reservoir in the oil reservoir, and obtain theoretical inhalation percentages of each reservoir in the first target reservoir according to the reservoir parameters;
and the adjusting module is configured to adjust the initial lower pump depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target lower pump depth of the oil well pump.
In one embodiment, the theoretical percent imbibition for each of the reservoirs is calculated according to the following equation:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;and the weight correction value is expressed as the nth reservoir parameter of the ith reservoir.
Borrow by above technical scheme, the beneficial effect of this application lies in: the method comprises the steps of obtaining a geological communication grid diagram of an oil reservoir, and determining at least one first target oil layer according to the geological communication grid diagram and a first preset rule. And then determining the initial lower pump depth of the oil well pump according to the at least one first target oil layer and a second preset rule. And then acquiring oil layer parameters of the first target oil layer from the oil reservoir, acquiring theoretical suction percentage of each oil layer in the first target oil layer according to the oil layer parameters, and adjusting the initial pump-down depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump-down depth of the oil well pump. The method and the device for determining the pump-down depth of the multilayer oil reservoir can be used for putting an oil well pump down at the accurate position of a production well, so that the lifting efficiency of crude oil is improved.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
FIG. 1 is a geosynclinal grid diagram according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for determining pump depth in a multi-layer reservoir according to an embodiment of the present disclosure;
fig. 3 is a block diagram of an apparatus for determining a pump depth under a multi-layer reservoir according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 2, the present invention provides a method for determining a pump depth under a multi-layer oil reservoir, comprising the following steps:
s1: and acquiring a geological communication grid-shaped graph of the oil reservoir.
S2: and determining at least one first target oil layer according to the geological communication grid diagram and a first preset rule.
S3: and determining the initial lower pump depth of the oil well pump according to the at least one first target oil layer and a second preset rule.
S4: and acquiring oil layer parameters of the first target oil layer from the oil reservoir, and acquiring theoretical suction percentages of all oil layers in the first target oil layer according to the oil layer parameters.
S5: and adjusting the initial pump lowering depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump lowering depth of the oil well pump.
In the present embodiment, a geosynclinal grid of a reservoir is first obtained, for example, FIG. 1 shows a geosynclinal grid of a reservoir, as shown in FIG. 1, 2#The well being an injection well 1#The well is a production well. And determining at least one first target oil layer according to the geological communication grid diagram and a first preset rule. Wherein the first predetermined rule is that a reservoir which can be communicated from the injection well to the production well is determined as a first target reservoir. That is, oil layers that can communicate from an injection well to a production well are selected in the geosynclinal grid, and these oil layers are set as the first target oil layer. The first target reservoir may be plural.
And then, determining the initial lower pump depth of the oil well pump according to the at least one first target oil layer and a second preset rule. And the second preset rule is that the oil well pump is lowered below the first target oil layer close to the bottom of the well. That is, after the first target oil layer is determined, the pump is lowered below the first target oil layer closest to the bottom hole among the plurality of first target oil layers, and the position is determined as the initial pump-down depth of the pump. Specifically, the pump can be lowered 3-5 meters below the first target reservoir closest to the bottom of the well, taking into account the thick oil effect of the pump.
And then acquiring oil layer parameters of the first target oil layer from the oil reservoir, and acquiring theoretical suction percentages of all oil layers in the first target oil layer according to the oil layer parameters. And adjusting the initial pump lowering depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump lowering depth of the oil well pump. The first target oil layer may be divided into a first sub-oil layer in which the theoretical inhalation percentage is less than a threshold value and a second sub-oil layer in which the theoretical inhalation percentage is not less than the threshold value. Correspondingly, the third predetermined rule is: a second sub-reservoir of the first target reservoir located closest to a downhole location is identified. The pump is then lowered below the second sub-layer closest to the bottom hole location. The threshold for the percentage of oil imbibition is typically 0.0375.
Specifically, if the theoretical air intake percentage of the first target oil layer is less than the threshold value (0.0375), it indicates that the first target oil layer has a weak ability to absorb the air injected from the injection well at the side of the injection well, and thus the amount of hot tail gas generated by the fire flooding oil layer is correspondingly small when the first target oil layer is reacted to the side of the production well, and the first target oil layer at the side of the production well has almost no hot tail gas escaping. Therefore, when the oil well pump is put into the production well, the first sub oil layer with almost no hot tail gas fleeing can be disregarded. While only the first target reservoir with hot tail gas blow-by is considered, such reservoirs are typically the second sub-reservoir with a theoretical gas intake percentage not less than the threshold (0.0375). That is, after the first target oil layer (the first sub-oil layer) with the theoretical inhalation percentage smaller than the threshold (0.0375) is excluded, the remaining first target oil layer (the second sub-oil layer) with the theoretical inhalation percentage not smaller than the threshold (0.0375) has a certain influence on the lower pump depth. The hot tail gas produced by the oil-displacing layer will generally move upwards. Therefore, if the oil well pump in the production well is located above the hot tail gas generation layer or the hot tail gas generation layer, the oil well pump in the production well is likely to suck the hot tail gas to generate air resistance, and further the pump efficiency of the oil well pump is directly influenced. Therefore, the pump in the production well is lowered below the second sub-layer closest to the bottom of the well. Specifically, the oil well pump can be lowered to a position 3-5 meters below the second sub-oil layer closest to the bottom of the well in consideration of the thick oil effect of the oil well pump.
In one embodiment, the theoretical percent imbibition for each reservoir is calculated according to the following equation:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;and the weight correction value is expressed as the nth reservoir parameter of the ith reservoir.
Specifically, if n is 4, the 1 st reservoir parameter is the depth of the reservoir, the 2 nd reservoir parameter is the thickness of the reservoir, the 3 rd reservoir parameter is the porosity, and the 4 th reservoir parameter is the permeability. Then y is1iRepresenting the reservoir depth of the ith reservoir; y is2iRepresents the thickness of the ith oil layer; y is3iRepresenting the porosity of the ith reservoir; y is4iRepresents the permeability of the ith oil layer;a weight correction value indicating a reservoir depth of an i-th reservoir;a weight correction value indicating a thickness of an i-th oil layer;a weight correction value representing the porosity of the ith reservoir;a weight correction value representing permeability of an ith reservoir.
The weight correction value is:
wherein,a weight correction value representing a jth reservoir parameter for an ith reservoir; y isjiA j oil layer parameter representing an ith oil layer, wherein i is a positive integer from 1 to m, and j is a positive integer from 1 to n; n represents the number of reservoir parameters,denotes the mean value of the jth reservoir parameter of the ith reservoir, ajRepresenting the weight of the jth reservoir parameter.
In one embodiment, the number of reservoir parameters is 4, that is, n is 4, and j may have a value of 1, 2, 3, 4. The 4 reservoir parameters were: depth, thickness, porosity, and permeability of the reservoir. Of course, it will be apparent to those skilled in the art that the selection of reservoir parameters may be selected according to actual production needs.
Wherein, the weight of the oil layer parameter can be obtained according to the following formula:
(1) selecting a target sequence and analyzing the sequence:
in the formula,expressed as a target sequence;expressed as a comparison sequence; m represents the sequence length; j is a positive integer from 1 to n, and n is the number of comparison sequences.
(2) According to the formulaCarrying out non-dimensionalization treatment on the selected target sequence and the analysis sequence; wherein x isb(k) Is denoted by yb(k) A dimensionless number of (d); y isb(k) Shown as in step 1Any value within; b is a positive integer from 0 to 4.
(3) According to the formulaDetermining the coefficient ξ0j(k) In that respect Wherein, Deltaj(k)＝|x0(k)-xj(k)|；x0(k) Representing the actual air intake of the dimensionless reservoir; x is the number ofj(k) Represents a dimensionless reservoir parameter j;represents each data point Δj(k) The minimum value of the absolute value of the difference of (d);represents each data point Δj(k) The maximum value of the absolute value of the difference of (a); ρ is expressed as a resolution coefficient, ρ ∈ (0, 1).
(4) According to the formulaObtaining a correlation value r0j. Wherein j is a positive integer from 1 to 4.
(5) The obtained correlation value r0jThe weight a of the oil layer parameter can be obtained by normalization processingj. Wherein, a1Weights expressed as reservoir depth; a is2Weight expressed as reservoir thickness; a is3A weight representing porosity; a is4Represents the weight of permeability.
The invention provides a specific embodiment to explain the method for determining the pump depth under the multilayer oil reservoir. It should be noted, however, that this embodiment is only for better illustration of the present invention and should not be construed as a limitation of the present invention.
In this embodiment, assuming that the initial pump-down depth of the oil well pump has been determined according to the above description, only the adjustment of the initial pump-down depth of the oil well pump to obtain the target pump-down depth of the oil well pump will be described below.
For example, the number m of oil layers in the first target oil layer in the oil reservoir is 8, the number of oil layer parameters n is 4, and the 4 oil layer parameters are respectively: depth, thickness, porosity, and permeability of the reservoir.
Step 1: acquiring the actual air suction of 8 first target oil layers in the oil reservoir as a target sequence:
4 reservoir parameters of 8 first target reservoirs in the reservoir: the depth, thickness, porosity, and permeability of the reservoir were analyzed as sequences:
oil layer depth:
oil layer thickness:
porosity:
permeability:
step 2: according to the formulaWherein x isb(k) Is denoted by yb(k) A dimensionless number of (d); y isb(k) Shown as in step 1Any value within; b is a positive integer from 0 to 4;
carrying out non-dimensionalization processing on each numerical value in the target sequence and the analysis sequence in the step 1 to obtain:
and step 3: according to the formulaDetermining the coefficient ξ0j(k) In that respect Wherein, Deltaj(k)＝|x0(k)-xj(k)|；x0(k) Representing the actual air intake of the dimensionless reservoir; x is the number ofj(k) Represents a dimensionless reservoir parameter j;represents each data point Δj(k) The minimum value of the absolute value of the difference of (d);represents each data point Δj(k) The maximum value of the absolute value of the difference of (a); ρ is expressed as a resolution coefficient, ρ ∈ (0, 1).
ξ01(8)＝(0.365，0.596，0.622，0.596，0.366，0.570，1.000，0.634)；
ξ02(8)＝(0.460，0.862，1.000，0.659，0.408，0.822，0.609，0.739)；
ξ03(8)＝(0.354，0.614，0.536，0.609，0.365，0.615，1.000，0.597)；
ξ04(8)＝(0.444，0.726，0.436，1.000，0.616，0.965，0.601，0.737)。
And 4, step 4: according to the formulaObtaining a correlation value r0j. Wherein j is a positive integer from 1 to 4. The following can be obtained: r is01＝0.594，r02＝0.695，r03＝0.586，r04＝0.691。
And 5: the obtained correlation value r0jThe weight a of the oil layer parameter can be obtained by normalization processingjWherein a is1Weights expressed as reservoir depth; a is2Weight expressed as reservoir thickness; a is3A weight representing porosity; a is4Represents the weight of permeability.
a1＝0.231，a2＝0.271，a3＝0.228，a4＝0.270。
Step 6: will weight a1＝0.231，a2＝0.271，a3＝0.228，a4The weight correction formula is substituted by 0.270, and the weight correction value is obtained. The weight correction formula is as follows:
wherein,a weight correction value representing a jth reservoir parameter for an ith reservoir; y isjiA j oil layer parameter representing an ith oil layer, wherein i is a positive integer from 1 to m, and j is a positive integer from 1 to n; n represents the number of reservoir parameters,denotes the mean value of the jth reservoir parameter of the ith reservoir, ajRepresenting the weight of the jth reservoir parameter.
And 7: and (4) substituting the weight correction value obtained in the step (6) into a theoretical inspiration percentage formula of each oil layer to obtain the theoretical inspiration percentage of each first oil layer. Wherein, the theoretical air suction percentage formula of each oil layer is as follows:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;and the weight correction value is expressed as the nth reservoir parameter of the ith reservoir.
Specifically, n is 4, the 1 st reservoir parameter is expressed as the depth of the reservoir, the 2 nd reservoir parameter is expressed as the thickness of the reservoir, the 3 rd reservoir parameter is expressed as the porosity, and the 4 th reservoir parameter is expressed as the permeability. Then y is1iRepresenting the reservoir depth of the ith reservoir; y is2iRepresents the thickness of the ith oil layer; y is3iRepresenting the porosity of the ith reservoir; y is4iRepresents the permeability of the ith oil layer;a weight correction value indicating a reservoir depth of an i-th reservoir;a weight correction value indicating a thickness of an i-th oil layer;a weight correction value representing the porosity of the ith reservoir;a weight correction value representing permeability of an ith reservoir.
The theoretical percent of inspiration for each first reservoir was:
and 8: comparing the theoretical inhalation percentage of each first oil layer with a threshold value to obtain a first sub oil layer and a second sub oil layer:
wherein, the second sub-oil layers are the 1 st layer, the 5 th layer and the 7 th layer of which the theoretical air suction percentage is not less than the threshold value.
And step 9: and (3) the oil well pump is put below the second sub oil layer closest to the bottom hole position, namely, the oil well pump is put below the 7 th layer. Preferably, the oil well pump can be put into a position 3-5 meters below the 7 th oil layer. The position is the target lower pump position of the oil well pump.
The method comprises the steps of obtaining a geological communication grid diagram of an oil reservoir, and determining at least one first target oil layer according to the geological communication grid diagram and a first preset rule. And then determining the initial lower pump depth of the oil well pump according to the at least one first target oil layer and a second preset rule. And then acquiring oil layer parameters of the first target oil layer from the oil reservoir, acquiring theoretical suction percentage of each oil layer in the first target oil layer according to the oil layer parameters, and adjusting the initial pump-down depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump-down depth of the oil well pump. The method for determining the pump-lowering depth of the multilayer oil reservoir can be used for lowering an oil well pump at the accurate position of a production well, and the original lifting efficiency is improved.
Based on the same inventive concept, the embodiment of the invention also provides a device for determining the pump depth under the multilayer oil reservoir, as described in the following embodiment. Because the principle of solving the problems of the device for determining the pump depth under the multilayer oil reservoir is similar to the method for determining the pump depth under the multilayer oil reservoir, the implementation of the device for determining the pump depth under the multilayer oil reservoir can refer to the implementation of the method for determining the pump depth under the multilayer oil reservoir, and repeated parts 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.
As shown in fig. 3, the present invention provides an apparatus for determining a pump depth under a multi-layered reservoir, comprising:
an acquisition module 101 configured to acquire a geosynclinal grid of a reservoir.
A first determination module 102 configured to determine at least one first target reservoir according to a first predetermined rule based on the geosynclinal grid.
A second determination module 103 configured to determine an initial pump-down depth of the pump according to a second predetermined rule based on the at least one first target reservoir.
An obtaining module 104 configured to obtain reservoir parameters of the first target reservoir in the oil reservoir, and obtain theoretical inhalation percentages of each reservoir in the first target reservoir according to the reservoir parameters.
And the adjusting module 105 is configured to adjust the initial lower pump depth of the oil well pump according to a third predetermined rule according to the theoretical suction percentage of each oil layer to obtain a target lower pump depth of the oil well pump.
In one embodiment, the theoretical percent imbibition for each of the reservoirs is calculated according to the following equation:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;and the weight correction value is expressed as the nth reservoir parameter of the ith reservoir.
In another embodiment, a software for implementing the technical solutions described in the above embodiments and preferred embodiments is also provided.
In another embodiment, a storage medium is provided, in which the software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for determining the pump depth under a multilayer oil reservoir is characterized by comprising the following steps:
acquiring a geological communication grid diagram of an oil reservoir;
determining at least one first target oil layer according to the geological communication grid-shaped graph and a first preset rule;
determining the initial pump lowering depth of the oil well pump according to the at least one first target oil layer and a second preset rule;
acquiring oil layer parameters of the first target oil layer in the oil reservoir, and acquiring theoretical suction percentages of all oil layers in the first target oil layer according to the oil layer parameters;
adjusting the initial pump lowering depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target pump lowering depth of the oil well pump;
calculating the theoretical air suction percentage of each oil layer according to the following formula:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;a weight correction value expressed as an nth reservoir parameter of an ith reservoir;
calculating the weight correction value according to the following formula:
wherein,a weight correction value representing a jth reservoir parameter for an ith reservoir; y isjiIndicates the ith oil layerI is a positive integer from 1 to m, and j is a positive integer from 1 to n; n represents the number of reservoir parameters,denotes the mean value of the jth reservoir parameter of the ith reservoir, ajA weight representing a jth reservoir parameter;
the first target oil layer comprises a first sub-oil layer with the theoretical inhalation percentage smaller than a threshold value and a second sub-oil layer with the theoretical inhalation percentage not smaller than the threshold value, and correspondingly, the third preset rule is as follows: a second sub-reservoir of the first target reservoir located closest to a downhole location is identified.
2. The method for determining the pump depth under a multi-layered reservoir as defined in claim 1, wherein the first predetermined rule is: and determining a reservoir which can be communicated from the injection well to the production well as a first target reservoir.
3. The method of determining the depth of a pump under a multi-layered reservoir of claim 1, wherein the second predetermined rule is: and (4) putting the oil well pump below the first target oil layer close to the bottom of the well.
4. The method for determining the pump depth under the multilayer oil reservoir according to claim 1, wherein the number of the oil layer parameters is 4, and the 4 oil layer parameters are respectively as follows: depth, thickness, porosity, and permeability of the reservoir.
5. The method of claim 1, wherein the pump is lowered below a second sub-layer closest to the bottom hole location.
6. An apparatus for determining pump depth in a multi-layer reservoir, comprising:
an acquisition module configured to acquire a geosynclinal grid of an oil reservoir;
a first determination module configured to determine at least one first target reservoir according to a first predetermined rule based on the geosynclinal grid;
a second determination module configured to determine an initial pump-down depth of the oil-well pump according to a second predetermined rule based on the at least one first target oil layer;
an obtaining module configured to obtain reservoir parameters of the first target reservoir in the oil reservoir, and obtain theoretical inhalation percentages of each reservoir in the first target reservoir according to the reservoir parameters;
the adjusting module is configured to adjust the initial lower pump depth of the oil well pump according to the theoretical suction percentage of each oil layer and a third preset rule to obtain the target lower pump depth of the oil well pump;
calculating the theoretical air suction percentage of each oil layer according to the following formula:
wherein, thetaiExpressing the theoretical percent inspiration of the ith reservoir; m represents the number of oil layers; y is1i1 st reservoir parameter representing the ith reservoir; y is2iA 2 nd reservoir parameter representing an ith reservoir; y isniAn nth reservoir parameter expressed as an ith reservoir;a weight correction value representing a 1 st reservoir parameter of an ith reservoir;a weight correction value representing a 2 nd reservoir parameter for the ith reservoir;a weight correction value expressed as an nth reservoir parameter of an ith reservoir;
calculating the weight correction value according to the following formula:
wherein,a weight correction value representing a jth reservoir parameter for an ith reservoir; y isjiA j oil layer parameter representing an ith oil layer, wherein i is a positive integer from 1 to m, and j is a positive integer from 1 to n; n represents the number of reservoir parameters,denotes the mean value of the jth reservoir parameter of the ith reservoir, ajA weight representing a jth reservoir parameter;
the first target oil layer comprises a first sub-oil layer with the theoretical inhalation percentage smaller than a threshold value and a second sub-oil layer with the theoretical inhalation percentage not smaller than the threshold value, and correspondingly, the third preset rule is as follows: a second sub-reservoir of the first target reservoir located closest to a downhole location is identified.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670348A (en) * | 2013-12-25 | 2014-03-26 | 中国石油天然气股份有限公司 | Oil well production characteristic evaluation method and device |
| CN104405364A (en) * | 2014-10-23 | 2015-03-11 | 中国石油天然气股份有限公司 | Oil well production characteristic evaluation method and device |
| CN105134187A (en) * | 2015-08-18 | 2015-12-09 | 中国石油天然气股份有限公司 | Method and device for assisting oil deposit sedimentary facies division and connectivity evaluation |
| 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 |
-
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- 2016-07-08 CN CN201610537718.3A patent/CN106097132B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670348A (en) * | 2013-12-25 | 2014-03-26 | 中国石油天然气股份有限公司 | Oil well production characteristic evaluation method and device |
| CN104405364A (en) * | 2014-10-23 | 2015-03-11 | 中国石油天然气股份有限公司 | Oil well production characteristic evaluation method and device |
| 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 |
| CN105134187A (en) * | 2015-08-18 | 2015-12-09 | 中国石油天然气股份有限公司 | Method and device for assisting oil deposit sedimentary facies division and connectivity evaluation |
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