CN107366533B - Method and device for determining yield increasing mode of oil reservoir - Google Patents
Method and device for determining yield increasing mode of oil reservoir Download PDFInfo
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- CN107366533B CN107366533B CN201710650477.8A CN201710650477A CN107366533B CN 107366533 B CN107366533 B CN 107366533B CN 201710650477 A CN201710650477 A CN 201710650477A CN 107366533 B CN107366533 B CN 107366533B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
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Abstract
The application provides a method and a device for determining a yield increasing mode of an oil reservoir, wherein the method comprises the following steps: acquiring reservoir characteristics of a target reservoir; acquiring characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined; respectively determining the oil increment amount of each preset yield increasing mode according to the oil reservoir characteristics of the target oil reservoir and the characteristic parameters of each preset yield increasing mode in the plurality of preset yield increasing modes; and determining the yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode in the plurality of preset yield increasing modes. According to the scheme, the geological condition of the target oil reservoir and the implementation characteristics of different yield increasing modes are fully considered, the oil increasing amount corresponding to the different yield increasing modes is respectively determined, and the yield increasing mode of the target oil reservoir is determined by taking the oil increasing amount as the basis of quantitative evaluation. Therefore, the yield increasing mode suitable for the specific target oil reservoir can be simply and accurately determined, and a good yield increasing effect is achieved.
Description
Technical Field
The application belongs to the technical field of oil reservoir development, and particularly relates to a method and a device for determining a yield increasing mode of an oil reservoir.
Background
In the process of specifically developing a fracture-cavity type oil reservoir, the oil reservoir is usually depleted and exploited by relying on natural energy first; after the oil well stops spraying, one of oil pumping unit, electric submersible pump or gas lift measure is adopted to increase production. Different yield increasing modes have different characteristics; and different yield increasing modes are used for increasing the yield of the oil deposit corresponding to different oil deposit conditions, and the obtained effects are different. Therefore, how to determine a stimulation mode suitable for the target oil reservoir so as to effectively stimulate and produce the target oil reservoir is an important problem.
In order to determine the yield increasing mode of the oil reservoir, most of the existing methods select one of a plurality of yield increasing modes to correspondingly increase the yield of the target oil reservoir according to the experience of a constructor. However, this method is greatly influenced by human factors, and the effect of different yield increasing methods cannot be quantitatively evaluated more accurately. Thus, when implemented, the error may be relatively large and the determined stimulation mode may not be the most appropriate stimulation mode for the target reservoir.
In summary, there is a need for a method or a device for determining a yield increasing mode with a better effect from a plurality of yield increasing modes according to the specific conditions of an oil reservoir and by combining the implementation characteristics of different yield increasing modes.
Disclosure of Invention
The application aims to provide a method and a device for determining a yield increasing mode of an oil reservoir, which can simply and accurately determine the yield increasing mode suitable for a specific target oil reservoir, so that a better yield increasing effect can be achieved.
The application provides a method for determining a yield increasing mode of an oil reservoir, which comprises the following steps:
acquiring reservoir characteristics of a target reservoir;
acquiring characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined;
respectively determining the oil increment amount of each preset yield increasing mode in the preset yield increasing modes according to the oil deposit characteristics of the target oil deposit and the characteristic parameters of each preset yield increasing mode in the preset yield increasing modes;
and determining a yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode.
In one embodiment, the target reservoir comprises a fracture-cavity reservoir.
In one embodiment, the reservoir characteristics of the target reservoir include at least one of: the oil reservoir reserves, the comprehensive compression coefficient, the crude oil density, the volume coefficient of the first crude oil and the volume coefficient of the second crude oil.
In one embodiment, determining the oil increment for each of the plurality of preset stimulation patterns comprises: the oil increment of a preset production increasing mode is determined according to the following formula:
in the above formula,. DELTA.NPiOil increment for a predetermined production increase pattern, rhooIs crude oil density, g is gravitational acceleration, hiTo preset characteristic parameters of the mode of production increase, CtFor the integrated compression factor, N is the reservoir reserve, BoiIs the first crude oil volume coefficient, BoIs the volume factor of the second crude oil.
In one embodiment, the plurality of predetermined stimulation patterns includes at least one of: the yield is increased by using the oil pumping unit, the yield is increased by using the electric submersible pump and the yield is increased by using a gas lift measure.
In one embodiment, in the case that the preset yield increasing mode is the yield increasing by using the oil pumping unit, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of a pump cylinder of the oil pumping unit; under the condition that the preset yield increasing mode is to increase the yield by using the electric submersible pump, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the inlet of the electric submersible pump; and under the condition that the preset yield increasing mode is the yield increasing by using a gas lift measure, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the gas lift valve.
In one embodiment, determining a stimulation mode applied to the target oil reservoir from the plurality of preset stimulation modes according to the oil increment amount of each preset stimulation mode comprises:
and comparing the oil increment of each preset production increasing mode in the plurality of preset production increasing modes, and determining the preset production increasing mode corresponding to the oil increment with the largest numerical value as the production increasing mode of the target oil reservoir.
In one embodiment, after determining the stimulation mode of the target reservoir, the method further comprises:
establishing a relation curve of the oil increment of the target oil reservoir according to the characteristic parameters of the oil increment mode of the target oil reservoir and the oil increment of the oil increment mode of the target oil reservoir;
and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
This application still please provide a device for confirming of production increasing mode of oil reservoir, include:
the first acquisition module is used for acquiring the reservoir characteristics of the target reservoir;
the second acquisition module is used for acquiring the characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined;
the first determining module is used for respectively determining the oil increment of each preset yield increasing mode in the preset yield increasing modes according to the oil reservoir characteristics of the target oil reservoir and the characteristic parameters of each preset yield increasing mode in the preset yield increasing modes;
and the second determining module is used for determining the yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode.
In one embodiment, the apparatus further comprises: the development module is used for establishing a relation curve of the oil increment amount of the target oil reservoir according to the characteristic parameters of the oil increment manner of the target oil reservoir and the oil increment amount of the oil increment manner of the target oil reservoir; and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
According to the method and the device for determining the yield increasing mode of the oil reservoir, the oil increasing amount corresponding to different yield increasing modes is determined by fully considering the geological condition of the target oil reservoir and the implementation characteristics of different yield increasing modes, and the yield increasing mode of the target oil reservoir is determined by taking the oil increasing amount as the basis for quantitatively evaluating the yield increasing modes. Therefore, the yield increasing mode suitable for the target oil reservoir can be simply and accurately determined, and a good yield increasing effect is achieved.
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 creative efforts.
FIG. 1 is a method flow diagram of one embodiment of a method for determining a stimulation profile of a reservoir provided herein;
FIG. 2 is a schematic diagram of a configuration of an embodiment of an apparatus for determining a stimulation mode of a reservoir provided herein;
FIG. 3 is a schematic diagram of characteristic parameters of different stimulation modes obtained by applying the method/device for determining the stimulation modes of an oil reservoir provided by the embodiment of the application in one scene example;
FIG. 4 is a schematic diagram of oil increment for different stimulation modes obtained by applying the method/device for determining the stimulation mode of an oil reservoir provided by the embodiment of the application in one scene example;
fig. 5 is a schematic diagram of a relationship curve of target oil reservoir oil increment obtained by applying the method/device for determining the oil reservoir stimulation mode provided by the embodiment of the application in one scene example.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, 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 shall fall within the scope of protection of the present application.
Considering that the conventional method usually does not carry out specific quantitative evaluation on the effects of different yield increasing modes, one of the multiple yield increasing modes is selected to carry out yield increasing development on the target oil reservoir according to the experience of a constructor. Therefore, the number of errors is relatively large, and the determined stimulation mode may not be the most suitable stimulation mode for the target reservoir. Aiming at the situation, the implementation characteristics of the geological situation of the target oil reservoir and different yield increasing modes can be comprehensively considered, the oil increasing amount corresponding to the different yield increasing modes is introduced and predicted, and the oil increasing amount is used as the basis for quantitatively evaluating the yield increasing modes to determine the yield increasing mode suitable for the target oil reservoir. Therefore, the yield increasing mode suitable for the target oil reservoir can be simply and accurately determined, and a good yield increasing effect is achieved.
Based on one of the innovative ideas, the application provides a method for determining a yield increasing mode of an oil reservoir. Specifically, refer to fig. 1, which is a flow chart of a method of determining a stimulation mode of an oil reservoir according to an embodiment of the present disclosure. The method for determining the stimulation mode of the oil reservoir provided by the embodiment of the application specifically includes the following contents.
S11: and acquiring reservoir characteristics of the target reservoir.
In one embodiment, the target reservoir may be a fracture-cavity reservoir. The fracture-cavity type oil reservoir is also called a fracture-cavity type carbonate rock oil reservoir, and specifically may refer to an oil reservoir which uses large-scale karst caves, fractures and microcracks as reservoir spaces, and uses the fractures and microcracks as flow channels, and the oil reservoir usually has extremely strong heterogeneity, and the continuity of the oil reservoir space is poor (for example, the oil reservoir has a characteristic that a large number of wells control one oil reservoir). When such oil reservoirs are particularly exploited, due to the complexity of the oil reservoir reservoirs, the yield of the fracture-cavity type oil reservoir is decreased quickly and the stable yield is difficult to achieve. The mining process can generally be failure mining by relying on natural energy; after the oil well stops spraying and the yield is reduced, yield increasing exploitation can be carried out by adopting yield increasing modes such as an oil pumping unit, an electric submersible pump, a gas lift measure and the like.
In the present embodiment, the method for determining a stimulation method for an oil reservoir according to the present invention is a method for determining a stimulation method for an oil reservoir, which is represented by a fracture-cavity type oil reservoir, and includes: the internal characteristics and the exploitation mechanism of the oil reservoir are good in internal connectivity of the oil reservoir, small in flow resistance and capable of meeting the characteristics of constant volume characteristics and the like, so that the method for determining the yield increasing mode of the oil reservoir is suitable for but not limited to fracture-cavity oil reservoirs. For other types but satisfying: the oil reservoir has good internal connectivity and small flow resistance, and meets the characteristics of constant volume and the like, and can also be suitable.
In one embodiment, the reservoir characteristics of the target reservoir may specifically include: the oil reservoir reserves, the comprehensive compression coefficient, the crude oil density, the volume coefficient of the first crude oil, the volume coefficient of the second crude oil and the like. It should be understood that the above-mentioned parameter data are only for better illustration of the embodiment of the present application, and in the specific implementation, other data besides the above-mentioned parameter data may be introduced as the reservoir characteristics of the target reservoir according to the specific situation and the corresponding construction requirements. Therefore, the characteristics of good internal connectivity, small flow resistance, accordance with constant volume characteristics and the like of the fracture-cavity oil reservoir can be reflected through the characteristic parameters.
In the present embodiment, the comprehensive compressibility may specifically be a comprehensive compressibility that satisfies geological pressure and temperature conditions of the region where the target reservoir is located. The first crude oil volume coefficient may specifically refer to a volume coefficient of crude oil that satisfies the initial formation conditions (i.e., has not been produced) of the region where the target reservoir is located. The second crude oil volume coefficient may specifically be a crude oil volume coefficient that satisfies the current formation conditions (i.e., failing production has been performed by means of natural energy) of the region where the target reservoir is located.
S13: and acquiring characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined.
In one embodiment, the plurality of preset stimulation modes may specifically include at least one of: the yield is increased by using the oil pumping unit, the yield is increased by using the electric submersible pump and the yield is increased by using a gas lift measure. In specific implementation, two or three of the above yield increasing modes can be selected as the plurality of preset yield increasing modes according to specific conditions. It should be understood that the three yield increasing methods listed above are only for better explanation of the present embodiment, and in the case of concrete implementation, a method other than the yield increasing methods listed above may be selected as the preset yield increasing method according to concrete circumstances and construction requirements.
In one embodiment, according to the implementation principle and construction characteristics of different production increasing modes, by combining the exploitation characteristics of the fracture-cavity oil reservoir, different parameters can be selected as the characteristic parameters of the production increasing mode according to the different production increasing modes. Specifically, under the condition that the preset yield increasing mode is that the oil pumping unit is used for increasing the yield, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of a pump cylinder of the oil pumping unit; under the condition that the preset yield increasing mode is to increase the yield by using the electric submersible pump, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the inlet of the electric submersible pump; and under the condition that the preset yield increasing mode is the yield increasing by using a gas lift measure, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the gas lift valve. Therefore, the characteristics of different yield increasing modes can be better combined, and the effects of the different yield increasing modes can be accurately predicted.
S15: and respectively determining the oil increment amount of each preset yield increasing mode in the preset yield increasing modes according to the oil deposit characteristics of the target oil deposit and the characteristic parameters of each preset yield increasing mode in the preset yield increasing modes.
In one embodiment, in order to determine the oil increment amount of each preset stimulation mode respectively, in specific implementation, the specific oil increment amount may be determined according to the following formula according to the reservoir characteristics of the target reservoir and the characteristic parameters of the preset stimulation mode:
in the above formula,. DELTA.NPiOil increment for a predetermined production increase pattern, rhooIs crude oil density, g is gravitational acceleration, hiTo preset characteristic parameters of the mode of production increase, CtFor the integrated compression factor, N is the reservoir reserve, BoiIs the first crude oil volume coefficient, BoIs the volume factor of the second crude oil.
In the present embodiment, when the oil increase amount for increasing the output by the pumping unit is determined by the above formula, the preset output increasing method is to increase the output by the pumping unit, and correspondingly, h in the formula isiThe characteristic parameter for increasing the yield of the pumping unit, namely the depth of the lower end of the pump cylinder of the pumping unit, can be recorded as h1The corresponding determined fuel increase can be recorded as Δ NP1. When the oil increasing amount for increasing the yield by using the electric submersible pump is determined by using the above formula, the preset yield increasing mode is that the yield is increased by using the electric submersible pump, and correspondingly, h in the above formulaiThe characteristic parameter for increasing the yield by using the electric submersible pump, namely the depth of the lower end of the inlet of the electric submersible pump can be recorded as h2The corresponding determined fuel increase can be recorded as Δ NP2. When the oil increasing amount for increasing the yield by using the gas lift measure is determined by using the above formula, the preset yield increasing mode is that the yield is increased by using the gas lift measure, and correspondingly, h in the formulaiThe characteristic parameter for increasing the production by means of gas lift measures, i.e. the depth of the lower end of the gas lift valve, can be recorded as h3The corresponding determined fuel increase can be recorded as Δ NP3. Therefore, the oil increasing amount corresponding to different yield increasing modes can be determined by combining the characteristics of the target oil reservoir according to the characteristics of different yield increasing modes.
In this embodiment, it is to be supplemented that the process of determining the oil increment amount of the yield increasing mode can be understood as predicting the corresponding effect, that is, the corresponding oil increment amount, obtained by increasing the yield by using different yield increasing modes according to the characteristics of different yield increasing modes and by combining the characteristics of a specific target oil reservoir. So that the effects of different yield increasing modes can be evaluated uniformly and objectively according to the oil increasing amount corresponding to the different yield increasing modes in the following process, and the yield increasing mode suitable for the target oil reservoir can be determined accurately.
S17: and determining a yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode.
In an embodiment, the determining, according to the oil increment amount of each preset production increasing mode, a production increasing mode applied to the target oil reservoir from the plurality of preset production increasing modes may specifically include: and comparing the oil increment of each preset production increasing mode in the plurality of preset production increasing modes, and determining the preset production increasing mode corresponding to the oil increment with the largest numerical value as the production increasing mode of the target oil reservoir. Specifically, for example, it is found by comparison that the oil increase amount by the pumping unit is larger than the oil increase amount by the submersible pump, and the oil increase amount by the submersible pump is larger than the oil increase amount by the gas lift measure, that is, the oil increase amount by the pumping unit is the largest. And then, the prediction effect of increasing the yield of the target oil reservoir by using the preset yield increasing mode of increasing the yield of the oil pumping unit is relatively best, the preset yield increasing mode of increasing the yield of the oil pumping unit can be determined as the yield increasing mode of the target oil reservoir, and the yield increasing mode of the target oil reservoir is used for carrying out specific yield increasing construction on the target oil reservoir.
In this embodiment, it should be noted that the oil increment amounts of different stimulation modes can be calculated according to the characteristics of the different stimulation modes and the characteristics of the specific target oil reservoir, so that the stimulation effects of the different stimulation modes can be quantitatively predicted. Furthermore, the oil increasing amount of different oil increasing modes can be used as evaluation basis to objectively and accurately determine which oil increasing mode has the best oil increasing effect for a specific target oil reservoir. Therefore, a yield increasing mode suitable for the target oil reservoir can be determined, so that yield increasing development can be carried out on the target oil reservoir, and a good yield increasing effect is achieved.
Compared with the existing method, the method has the advantages that the oil increasing amount corresponding to the application of different yield increasing modes is introduced and respectively determined by fully considering the geological condition of the target oil reservoir and the implementation characteristics of different yield increasing modes, and the yield increasing mode suitable for the target oil reservoir is determined by taking the oil increasing amount as the basis for quantitatively evaluating the yield increasing mode. Therefore, the yield increasing mode suitable for the target oil reservoir can be simply and accurately determined, and a good yield increasing effect is achieved.
In one embodiment, after determining the stimulation mode of the target reservoir, the method further comprises the following.
S1: and establishing a relation curve of the oil increment of the target oil reservoir according to the characteristic parameters of the oil increment mode of the target oil reservoir and the oil increment of the oil increment mode of the target oil reservoir.
S2: and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
In this embodiment, the relationship curve of the target reservoir increment may be a relationship curve of a characteristic parameter of the target reservoir production increasing method and a corresponding oil increment. In specific implementation, the characteristic parameter with good effect can be selected by taking the relation curve of the oil increment of the target oil reservoir as a basis, and the target oil reservoir is subjected to yield increase development in a yield increase mode of the target oil reservoir according to the characteristic parameter. Thus, a relatively good stimulation effect can be obtained.
From the above description, it can be seen that the method for determining the yield increasing mode of the oil reservoir introduces and respectively determines the oil increasing amount corresponding to the application of different yield increasing modes by fully considering the geological condition of the target oil reservoir and the implementation characteristics of different yield increasing modes, and determines the yield increasing mode suitable for the target oil reservoir by taking the oil increasing amount as the basis for quantitatively evaluating the yield increasing modes. Therefore, the yield increasing mode suitable for the target oil reservoir can be simply and accurately determined, and a better yield increasing effect is achieved; and the yield increasing effect is improved by establishing a relation curve of the oil increasing amount of the target oil reservoir and performing yield increasing development on the target oil reservoir according to the relation curve.
Based on the same inventive concept, the application also provides a device for determining the yield increasing mode of the oil reservoir, and the device is described in the following embodiment. Because the principle of solving the problems by the device is similar to the method for determining the yield increasing mode of the oil reservoir, the implementation of the device for determining the yield increasing mode of the oil reservoir can refer to the implementation of the method for determining the yield increasing mode of the 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. Please refer to fig. 2, which is a schematic structural diagram illustrating an embodiment of a device for determining a stimulation mode of an oil reservoir according to the present application. The device may specifically include: the first obtaining module 21, the second obtaining module 23, the first determining module 25, and the second determining module 27, and the structure will be described in detail below.
The first obtaining module 21 may be specifically configured to obtain reservoir characteristics of the target reservoir.
The second obtaining module 23 may be specifically configured to obtain a characteristic parameter of each preset production increasing manner in a plurality of preset production increasing manners to be determined.
The first determining module 25 may be specifically configured to respectively determine the oil increment amount of each preset production increasing manner in the plurality of preset production increasing manners according to the oil reservoir characteristics of the target oil reservoir and the characteristic parameters of each preset production increasing manner in the plurality of preset production increasing manners.
The second determining module 27 may be specifically configured to determine, according to the oil increment amount of each preset production increasing manner, a production increasing manner applied to the target oil reservoir from the plurality of preset production increasing manners.
In one embodiment, the apparatus may further include: the development module can be specifically used for establishing a relation curve of the oil increment amount of the target oil reservoir according to the characteristic parameters of the oil increment manner of the target oil reservoir and the oil increment amount of the oil increment manner of the target oil reservoir; and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
In one embodiment, the target reservoir may specifically include, but is not limited to, a fracture-cavity reservoir.
In one embodiment, the reservoir characteristics of the target reservoir may specifically include at least one of: the oil reservoir reserves, the comprehensive compression coefficient, the crude oil density, the volume coefficient of the first crude oil, the volume coefficient of the second crude oil and the like.
In one embodiment, when the first determining module 25 is implemented, the oil increment amount of the preset increasing mode can be determined according to the following formula:
in the above formula,. DELTA.NPiOil increment for a predetermined production increase pattern, rhooIs crude oil density, g is gravitational acceleration, hiTo preset characteristic parameters of the mode of production increase, CtFor the integrated compression factor, N is the reservoir reserve, BoiIs the first crude oil volume coefficient, BoIs the volume factor of the second crude oil.
In one embodiment, the plurality of preset stimulation modes may specifically include at least one of: the yield is increased by using an oil pumping machine, by using an electric submersible pump, by using a gas lift measure and the like.
In one embodiment, in specific implementation, when the preset yield increasing mode is a yield increase by using the pumping unit, the characteristic parameter of the preset yield increasing mode may specifically be a depth of a lower end of a pump barrel of the pumping unit; under the condition that the preset yield increasing mode is to increase the yield by using the electric submersible pump, the characteristic parameter of the preset yield increasing mode can be the depth of the lower end of the inlet of the electric submersible pump; when the preset production increasing mode is the condition of increasing the production by using a gas lift measure, the characteristic parameter of the preset production increasing mode can be the depth of the lower end of the gas lift valve.
In one embodiment, the second determining module 27 may specifically determine the stimulation mode applied to the target reservoir from the plurality of preset stimulation modes according to the following modes: and taking the preset yield increasing mode with the largest oil increasing amount in the plurality of preset yield increasing modes as the yield increasing mode applied to the target oil reservoir.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as 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 part of the description of the method embodiment.
It should be noted that, the systems, devices, modules or units described in the above embodiments may be implemented by a computer chip or an entity, or implemented by a product with certain functions. For convenience of description, in the present specification, the above devices are described as being divided into respective units by function, respectively. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
Moreover, in the subject specification, adjectives such as first and second may only be used to distinguish one element or action from another element or action without necessarily requiring or implying any actual such relationship or order. References to an element or component or step (etc.) should not be construed as limited to only one of the element, component, or step, but rather to one or more of the element, component, or step, etc., where the context permits.
From the above description, it can be seen that the determining device for the yield increasing mode of the oil reservoir provided by the application fully considers the geological condition of the target oil reservoir and the implementation characteristics of different yield increasing modes through the first determining module and the second determining module, introduces and respectively determines the oil increasing amount corresponding to the application of different yield increasing modes, and determines the yield increasing mode suitable for the target oil reservoir by taking the oil increasing amount as the basis for quantitatively evaluating the yield increasing mode. Therefore, the yield increasing mode suitable for the target oil reservoir can be simply and accurately determined, and a better yield increasing effect is achieved; and a relation curve of the oil increment of the target oil reservoir is established through the development module, and the yield increasing development is carried out on the target oil reservoir according to the relation curve, so that the yield increasing effect is improved.
In a specific implementation scenario, the method and the device for determining the yield increasing mode of the oil reservoir are applied to specifically evaluate and select the yield increasing mode of the fracture-cavity oil reservoir in a certain area. The following can be referred to as a specific implementation process.
S1: reservoir base parameters (i.e., reservoir characteristics of the target reservoir) are determined.
In the embodiment, during specific implementation, the fracture-cavity type reservoir reserves N and the comprehensive compression coefficient C can be determined according to reservoir engineering researchtAnd crude oil density parameters and other parameters as the characteristic parameters of the oil reservoir. Specifically, the following parameters may be obtained: the crude oil reserve N of the fracture-cavity oil reservoir is 50 multiplied by 104t, comprehensive compression coefficient CtIs 0.001 × 10-6Pa-1The density rho of the underground crude oil is 850Kg/m3Volume coefficient of crude oil (i.e. first volume coefficient of crude oil) B under original formation conditionsoi1.5, crude oil volume coefficient B under current formation conditionso(i.e., the second crude oil volume fraction) was 1.2.
S2: and determining an oil production mode (namely a preset yield increasing mode).
In the embodiment, according to the oil reservoir condition, the oil recovery mode to be adopted is determined: oil pumping machine, electric submersible pump, or gas lift (i.e. determining multiple preset production increasing modes, namely increasing production by using oil pumping machine, increasing production by using electric submersible pump, and increasing production by using gas lift measure).
S3: and determining key process parameters (namely characteristic parameters of a preset yield increasing mode).
In this embodiment, the corresponding key process parameters are determined based on the determined oil recovery mode. Specifically, when the oil extraction mode is the oil pumping unit, the depth h of the lower end of the pump barrel of the oil pumping unit1Is a key process parameter (namely a characteristic parameter for increasing the yield by using the oil pumping unit); when the oil extraction mode is the electric submersible pump, determining the depth h of the lower end of the pump inlet of the electric submersible pump2Key process parameters (namely characteristic parameters for increasing the yield by using an electric submersible pump); when the oil extraction mode is gas lift, determining the depth h of the gas lift valve at the lowest end3Is a key process parameter (namely a characteristic parameter for increasing the yield by using a gas lift measure). Specifically, fig. 3 is a schematic diagram of characteristic parameters of different stimulation modes obtained by applying the method/device for determining the stimulation mode of the oil reservoir according to the embodiment of the present application in one scenario example.
S4: and (4) calculating and analyzing the oil increment (namely determining the oil increment of each preset yield increasing mode in a plurality of preset yield increasing modes).
In this embodiment, the characteristics of the fracture-cavity reservoir are considered: the method has the advantages that the internal communication of the reservoir is good, the fluid flow resistance is small, the substance balance principle is adopted for analysis, the oil increasing amount of oil engines, electric submersible pumps and gas lift measures can be calculated according to the oil deposit basic parameters determined in S101 and the key process parameters determined in S103, and the method can be specifically processed according to the following formula:
in the above formula,. DELTA.NPFor increasing oil, the unit is 104t；ρoThe density of crude oil under the formation condition is Kg/m3(ii) a g is gravity acceleration with the unit of N/Kg; h isiAs key process parameters, i is 1, 2 and 3 (when i takes 1, an oil pumping unit is used, when i takes 2, an electric submersible pump is used, and when i takes 3, a gas lift is used), and the unit is m; ctIs the overall compressibility under formation conditions (i.e., the overall compressibility) in Pa–1(ii) a N is the fracture-cavity reservoir reserve with the unit of 104t；BoiThe volume coefficient of crude oil under the original formation condition (namely the volume coefficient of the first crude oil); b isoIs the volume factor of the crude oil under the current formation conditions (i.e. the volume factor of the second crude oil).
S5: and determining the specific oil recovery mode according to the oil increasing amount.
In this embodiment, specifically, referring to a schematic diagram of the oil increment of different stimulation modes obtained by applying the method/device for determining the stimulation mode of the oil reservoir provided by the embodiment of the present application in one example of a scenario shown in fig. 4, and a schematic diagram of an oil increment relation curve of a target oil reservoir obtained by applying the method/device for determining the stimulation mode of the oil reservoir provided by the embodiment of the present application in one example of a scenario shown in fig. 5, the following procedure can be performed. The ordinate h in fig. 5 may specifically represent the characteristic parameter of the stimulation mode applied to the target oil reservoir, and the abscissa may specifically represent the oil increment amounts corresponding to the characteristic parameters of different stimulation modes.
S5-1: and (3) calculating a series of relation curves of key process parameters h and the oil increment (namely the oil increment relation curve of the target oil reservoir) by combining the formula (1).
S5-2: and determining the oil increment of the corresponding oil recovery mode according to the calculated relation curve of the key process parameter h and the oil increment. And carrying out specific exploitation on the oil reservoir in the region according to the curve.
Specifically, for example, combining the formula (1), a relation curve between key process parameters and oil increment is calculated, the oil recovery mode (namely the yield increasing mode of the target oil reservoir) of the region is determined to be the electric submersible pump, and the depth h of the lower end of the inlet of the electric submersible pump is determined according to the relation curve23500m, corresponding to 1.82X 10 oil increment for oil recovery by electric submersible pump4t. And further taking the determined parameter data as a guide to carry out specific stimulation development on the oil reservoir in the area.
By the aid of the scene example, the method and the device for determining the yield increasing mode of the oil reservoir provided by the application are verified, oil increasing amounts corresponding to different yield increasing modes are introduced and respectively determined by fully considering the geological condition of the target oil reservoir and implementation characteristics of different yield increasing modes, the oil increasing amounts are used as the basis for quantitatively evaluating the yield increasing modes, and the yield increasing mode suitable for the target oil reservoir is determined. The yield increasing mode suitable for the target oil reservoir can be determined simply and accurately, and a good yield increasing effect is achieved.
It should be noted that although the present application refers to different specific embodiments, the present application is not limited to the cases described in the industry standards or the embodiments, and the like, some industry standards or the embodiments slightly modified based on the implementation described in the custom manner or the embodiments may also achieve the same, equivalent or similar, or the expected implementation effects after the modifications. Embodiments that employ such modified or transformed data acquisition, processing, output, determination, etc., may still fall within the scope of alternative embodiments of the present application.
Although the present application provides method steps as described in the embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one of many possible orders of execution and does not represent a unique order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) in accordance with the embodiments or methods shown in the figures. 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, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.
The apparatuses or modules and the like described in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product having a certain function. For convenience of description, the above devices are described as being divided into respective modules by function. Of course, in implementing the present application, the functions of each module may be implemented in one or more pieces of software and/or hardware, or a module that implements the same function may be implemented by a combination of a plurality of sub-modules, and the like. The above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Furthermore, those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the above method steps can be fully logically programmed such that the controller implements the same functions 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 carrying out the respective functions may also be considered as a structure within the hardware component. Or even means for performing the respective function may be regarded as being both a software module for performing the method and a structure within a hardware component.
The application 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, classes, etc. that perform particular tasks or implement particular abstract data types. The application may 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.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
While the application has been described in terms of several distinct embodiments, those of ordinary skill in the art will recognize that numerous modifications and variations may be made thereto without departing from the spirit of the application, and it is intended that the appended distinct embodiments include such modifications and variations as do not depart from the scope of the application as set forth in the appended claims.
Claims (7)
1. A method for determining a stimulation mode of an oil reservoir is characterized by comprising the following steps:
acquiring reservoir characteristics of a target reservoir;
acquiring characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined;
respectively determining the oil increment amount of each preset yield increasing mode in the preset yield increasing modes according to the oil deposit characteristics of the target oil deposit and the characteristic parameters of each preset yield increasing mode in the preset yield increasing modes;
determining a yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode;
wherein the reservoir characteristics of the target reservoir include at least one of: the oil reservoir reserves, the comprehensive compression coefficient, the crude oil density, the volume coefficient of the first crude oil and the volume coefficient of the second crude oil;
wherein the plurality of preset stimulation modes comprise at least one of the following: the yield is increased by using an oil pumping unit, by using an electric submersible pump and by using a gas lift measure; under the condition that the preset yield increasing mode is that the oil pumping machine is used for increasing the yield, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of a pump cylinder of the oil pumping machine; under the condition that the preset yield increasing mode is to increase the yield by using the electric submersible pump, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the inlet of the electric submersible pump; and under the condition that the preset yield increasing mode is the yield increasing by using a gas lift measure, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the gas lift valve.
2. The method of claim 1, wherein the target reservoir comprises a fracture-cavity reservoir.
3. The method of claim 1, wherein determining the amount of oil stimulated in each of the plurality of predetermined stimulation patterns comprises: the oil increment of a preset production increasing mode is determined according to the following formula:
in the above formula,. DELTA.NPiOil increment for a predetermined production increase pattern, rhooIs crude oil density, g is gravitational acceleration, hiTo preset characteristic parameters of the mode of production increase, CtFor the integrated compression factor, N is the reservoir reserve, BoiIs the first crude oil volume coefficient, BoIs the volume factor of the second crude oil.
4. The method of claim 1, wherein determining a stimulation mode for application to the target reservoir from the plurality of preset stimulation modes comprises:
and taking the preset yield increasing mode with the largest oil increasing amount in the plurality of preset yield increasing modes as the yield increasing mode applied to the target oil reservoir.
5. The method of claim 1, wherein after determining the stimulation profile for the target reservoir, the method further comprises:
establishing a relation curve of the oil increment of the target oil reservoir according to the characteristic parameters of the oil increment mode of the target oil reservoir and the oil increment of the oil increment mode of the target oil reservoir;
and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
6. An apparatus for determining a stimulation pattern of an oil reservoir, comprising:
the first acquisition module is used for acquiring the reservoir characteristics of the target reservoir;
the second acquisition module is used for acquiring the characteristic parameters of each preset yield increasing mode in a plurality of preset yield increasing modes to be determined;
the first determining module is used for respectively determining the oil increment of each preset yield increasing mode in the preset yield increasing modes according to the oil reservoir characteristics of the target oil reservoir and the characteristic parameters of each preset yield increasing mode in the preset yield increasing modes;
the second determining module is used for determining a yield increasing mode applied to the target oil reservoir from the plurality of preset yield increasing modes according to the oil increasing amount of each preset yield increasing mode;
wherein the reservoir characteristics of the target reservoir include at least one of: the oil reservoir reserves, the comprehensive compression coefficient, the crude oil density, the volume coefficient of the first crude oil and the volume coefficient of the second crude oil;
wherein the plurality of preset stimulation modes comprise at least one of the following: the yield is increased by using an oil pumping unit, by using an electric submersible pump and by using a gas lift measure; under the condition that the preset yield increasing mode is that the oil pumping machine is used for increasing the yield, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of a pump cylinder of the oil pumping machine; under the condition that the preset yield increasing mode is to increase the yield by using the electric submersible pump, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the inlet of the electric submersible pump; and under the condition that the preset yield increasing mode is the yield increasing by using a gas lift measure, the characteristic parameter of the preset yield increasing mode is the depth of the lower end of the gas lift valve.
7. The apparatus of claim 6, further comprising: the development module is used for establishing a relation curve of the oil increment amount of the target oil reservoir according to the characteristic parameters of the oil increment manner of the target oil reservoir and the oil increment amount of the oil increment manner of the target oil reservoir; and performing yield increase development on the target oil reservoir according to the relation curve of the oil increment of the target oil reservoir.
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