CN115263244B - Method and device for controlling drainage of air-water layer and computer storage medium - Google Patents
Method and device for controlling drainage of air-water layer and computer storage medium Download PDFInfo
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- E—FIXED CONSTRUCTIONS
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- E21B43/25—Methods for stimulating production
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- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The embodiment of the application discloses a drainage control method and device for an air-water layer and a computer storage medium, belonging to the technical field of oil-gas exploration and development. The method comprises the following steps: acquiring reservoir information of a reservoir where a target gas well is located, wherein the target gas well is a exploitation well for exploitation of a gas-water layer of the reservoir; determining a target drainage volume for drainage through the target gas well according to the reservoir information; and controlling the shaft of the target gas well to drain according to the target drainage amount. According to the embodiment of the application, the reasonable drainage amount of the gas-water layer aimed by the target gas well can be determined through the reservoir information of the reservoir, and drainage is carried out according to the determined drainage amount, so that the effective utilization of the gas-water layer is realized, the single-well productivity is improved, and meanwhile, the damage to the reservoir is avoided.
Description
Technical Field
The embodiment of the application relates to the technical field of oil and gas exploration and development, in particular to a drainage control method and device for a gas-water layer and a computer storage medium.
Background
In the field of oil and gas exploration, along with the reduction of the quality of reservoir resources, the difficulty of oil and gas exploration and development is increased increasingly, and the utilization of a reservoir is gradually changed from a reservoir to a gas-water layer (gas-water layer). Because the bound water in the micro-throat and the movable water in the large pore canal of the air-water layer occupy most of the volume of the throat, the bound water can increase the gas seepage resistance of the air-water layer, thereby restricting the gas production of the air-water layer. Therefore, in order to achieve effective use of the gas-water layer and to increase the gas production rate of the gas-water layer, it is necessary to control the water drainage of the gas-water layer.
At present, when drainage control is performed on a gas-water layer, different processes are generally utilized to drain accumulated liquid in a shaft so as to realize stable production of a gas well.
However, when the wellbore fluid is discharged, the specific drainage amount is not determined, when the drainage amount is large, the reservoir may be damaged, and when the drainage amount is small, the gas in the throat may not expand to break through the water seal area, so that the gas yield of the gas-water layer is low.
Disclosure of Invention
The embodiment of the application provides a drainage control method and device for a gas-water layer and a computer storage medium, which can be used for solving the problems that a reservoir is damaged or the gas yield of the gas-water layer is low because proper drainage cannot be determined in related technologies. The technical scheme is as follows:
in one aspect, a method for controlling drainage of an air-water layer is provided, the method comprising:
acquiring reservoir information of a reservoir where a target gas well is located, wherein the target gas well is a exploitation well for exploitation of a gas-water layer of the reservoir;
determining a target drainage volume for drainage through the target gas well according to the reservoir information;
and controlling the shaft of the target gas well to drain according to the target drainage amount.
In some embodiments, the obtaining reservoir information for a reservoir in which the target gas well is located comprises:
acquiring fracturing data for fracturing the reservoir, a gas-water relative permeability curve of the reservoir and logging data of the target gas well;
acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from a gas-water relative permeability curve of the reservoir;
determining the permeability intersection as the critical water saturation of the gas-water layer;
determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
and determining the thickness, the porosity and the original water saturation of the gas-water layer according to the logging data.
In some embodiments, the determining the thickness, porosity, and original water saturation of the gas-water layer from the logging data comprises:
acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer;
Determining the porosity according to the density and core analysis porosity model;
and determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
In some embodiments, the reservoir information includes critical water saturation of the gas-water layer, single well control area, porosity, thickness of the gas-water layer, original water saturation of the gas-water layer, and a retrofit well logging fluid volume of the reservoir;
the determining, based on the reservoir information, a target drainage volume for drainage through the target gas well, comprising:
determining a first displacement in the gas-water layer for exploitation of the target gas well according to the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness and the original water saturation of the gas-water layer;
and adding the first drainage amount and the transformed well logging liquid amount to obtain the target drainage amount.
In some embodiments, the determining a first displacement in the gas-water layer for which the target gas well is directed based on the critical water saturation of the gas-water layer, a single well control area, the porosity, thickness, and the raw water saturation of the gas-water layer comprises:
Subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the water saturation difference, the single well control area, the thickness and the porosity to obtain the first displacement.
In some embodiments, the controlling the drainage of the wellbore of the target gas well according to the drainage comprises:
controlling a shaft of the target gas well to drain water according to a first drainage speed;
and stopping draining when the discharge amount reaches the discharge amount.
In another aspect, there is provided a drainage control device for an air-water layer, the device comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring reservoir information of a reservoir where a target gas well is located, and the target gas well is a exploitation well for exploitation of a gas-water layer of the reservoir;
the determining module is used for determining target drainage amount for drainage through the target gas well according to the reservoir information;
and the control module is used for controlling the shaft of the target gas well to drain water according to the target drainage amount.
In some embodiments, the acquisition module comprises:
the first acquisition submodule is used for acquiring fracturing data for fracturing the reservoir, a gas-water relative permeability curve graph of the reservoir and logging data of the target gas well;
The second acquisition submodule is used for acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from the gas-water relative permeability curve of the reservoir;
a first determination sub-module for determining the permeability intersection as a critical water saturation of the gas-water layer;
a second determination submodule for determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
and a third determination submodule for determining the thickness, the porosity and the original water saturation of the gas-water layer according to the logging data.
In some embodiments, the third determination submodule is to:
acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer;
determining the porosity according to the density and core analysis porosity model;
And determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
In some embodiments, the reservoir information includes critical water saturation of the gas-water layer, single well control area, porosity, thickness of the gas-water layer, original water saturation of the gas-water layer, and a retrofit well logging fluid volume of the reservoir;
the determining module includes:
a fourth determination submodule for determining a first displacement in the gas-water layer aimed at the exploitation of the target gas well according to the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness and the original water saturation of the gas-water layer;
and the calculation submodule is used for adding the first drainage amount and the transformed well logging liquid amount to obtain the target drainage amount.
In some embodiments, the fourth determination submodule is to:
subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the water saturation difference, the single well control area, the thickness and the porosity to obtain the first displacement.
In some embodiments, the control module includes:
A first control sub-module for controlling the wellbore of the target gas well to drain at a first drain rate;
and a second control sub-module for stopping the water discharge when the discharge amount reaches the discharge amount.
In another aspect, a computer storage medium having instructions stored thereon that when executed by a processor perform any of the steps of the method for controlling drainage of an aqueous and air layer described above is provided.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
in the embodiment of the application, the reasonable drainage amount of the gas-water layer aimed by the target gas well can be determined through the reservoir information of the reservoir, and drainage is carried out according to the determined drainage amount, so that the effective utilization of the gas-water layer is realized, the single-well productivity is improved, and meanwhile, the damage to the reservoir is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling drainage of an air-water layer according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for controlling drainage of an air-water layer according to an embodiment of the present application;
FIG. 3 is a schematic illustration of a graph of gas-water relative permeability provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of a porosity model for density and core analysis according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a device for controlling drainage of an air/water layer according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an acquisition module according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a determining module according to an embodiment of the present application;
FIG. 8 is a schematic structural diagram of a control module according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a control device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings.
Before explaining a drainage control method of an air-water layer provided by the embodiment of the application in detail, an application scene provided by the embodiment of the application is explained.
At present, a gas-water layer is gradually changed from a gas layer to a gas-water layer by a gas-water layer, and a large amount of bound water and movable water exist in the gas-water layer, so that the gas seepage resistance is increased by the bound water and the movable water, and the gas yield of the gas-water layer is restricted. Therefore, in order to increase the gas production rate of the gas-water layer, it is necessary to drain the gas-water layer.
However, when the water and air layer is drained, specific drainage amount is not determined, when the drainage amount is large, the reservoir may be damaged, and when the drainage amount is small, the air in the throat may not expand to break through a water seal area, so that the gas yield of the water and air layer is low.
Based on such application scenes, the embodiment of the application provides a drainage control method of a gas-water layer, which improves the gas production rate of the gas-water layer and the safety of the gas-water layer.
Fig. 1 is a flow chart of a drainage control method for an air-water layer, which is provided by the embodiment of the application, and the drainage control method for the air-water layer can comprise the following steps:
step 101: and acquiring reservoir information of a reservoir where a target gas well is located, wherein the target gas well is a production well for producing a gas-water layer of the reservoir.
Step 102: a target displacement for drainage through the target gas well is determined based on the reservoir information.
Step 103: and controlling the shaft of the target gas well to drain according to the target drainage amount.
In the embodiment of the application, the reasonable drainage amount of the gas-water layer aimed by the target gas well can be determined through the reservoir information of the reservoir, and drainage is carried out according to the determined drainage amount, so that the effective utilization of the gas-water layer is realized, the single-well productivity is improved, and meanwhile, the damage to the reservoir is avoided.
In some embodiments, obtaining reservoir information for a reservoir in which a target gas well is located includes:
acquiring fracturing data for fracturing the reservoir, a gas-water relative permeability curve of the reservoir and logging data of the target gas well;
acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from a gas-water relative permeability curve of the reservoir;
determining the permeability intersection as the critical water saturation of the gas-water layer;
determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
from the logging data, the thickness, porosity and original water saturation of the gas-water layer are determined.
In some embodiments, determining the thickness, porosity, and original water saturation of the gas-water layer from the logging data comprises:
Acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer included in the logging data;
determining the porosity according to the density and core analysis porosity model;
and determining the original water saturation of the air-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
In some embodiments, the reservoir information includes critical water saturation of the gas-water layer, single well control area, porosity, thickness of the gas-water layer, original water saturation of the gas-water layer, and a retrofit well logging fluid volume of the reservoir;
determining a target drainage volume for drainage through the target gas well based on the reservoir information, comprising:
determining a first displacement in the gas-water layer for which the target gas well is to be produced based on the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness of the gas-water layer, and the original water saturation;
and adding the first drainage amount and the transformed well logging liquid amount to obtain the target drainage amount.
In some embodiments, determining a first displacement in the gas-water layer for which the target gas well is to be produced based on the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness, and the raw water saturation of the gas-water layer comprises:
subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the difference in water saturation, the single well control area, the measured thickness and the porosity to obtain the first displacement.
In some embodiments, controlling the well bore of the target gas well to drain in accordance with the drainage comprises:
controlling a shaft of the target gas well to drain water according to a first drainage speed;
when the discharge amount reaches the discharge amount, the discharge is stopped.
All the above optional technical solutions may be combined according to any choice to form an optional embodiment of the present application, and the embodiments of the present application will not be described in detail.
Fig. 2 is a flowchart of a drainage control method for an air-water layer, which is provided in an embodiment of the present application, and the drainage control method for an air-water layer is applied to a control device for illustration, where the drainage control method for an air-water layer may include the following steps:
Step 201: the control device receives the acquisition instruction.
Since a specific amount of water to be discharged needs to be determined when the water-air layer needs to be discharged, the control device may receive the acquisition instruction at this time.
The acquiring instruction is an instruction for instructing the control device to acquire information, and the acquiring instruction can be triggered when a user acts on the control device through a specified operation, where the specified operation can be a click operation, a sliding operation, or a voice operation.
Step 202: the control equipment obtains reservoir information of a reservoir where a target gas well is located, wherein the target gas well is a production well for producing a gas-water layer of the reservoir.
Because the drainage of the gas-water layer is related to the reservoir information of the reservoir where the gas-water layer is located, the control device can acquire the reservoir information of the reservoir where the target gas well is located in order to accurately determine the drainage.
As an example, the control device may be capable of acquiring the reservoir information of the reservoir from the locally stored file when receiving the acquisition instruction, and may be capable of sending an information acquisition request to the other device when receiving the acquisition instruction, so as to acquire the reservoir information of the reservoir from the other device; or, the acquiring instruction can be triggered by an input operation of a worker, so that the acquiring instruction can carry the reservoir information of the reservoir, and the control device can acquire the reservoir information of the reservoir from the acquiring instruction, that is, the reservoir information of the reservoir is input to the control device by the worker.
It should be noted that the reservoir information can include at least critical water saturation of the gas-water layer, single well control area, porosity of the gas-water layer, thickness of the gas-water layer, original water saturation of the gas-water layer, and well logging fluid volume of the reservoir.
As an example, the reservoir information may or may not be directly acquired information, and when not directly acquired information, the operation of the control device to acquire the reservoir information of the reservoir where the target gas well is located at least includes the following operations: acquiring fracturing data for fracturing a reservoir, a gas-water relative permeability curve of the reservoir and logging data of a target gas well; acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from a gas-water relative permeability curve of a reservoir; determining the permeability intersection point as critical water saturation of the gas-water layer; determining a single well control area of the target gas well for a gas-water layer according to fracturing data of the reservoir and a single well drainage radius of the target gas well; from the log data, the thickness, porosity and original water saturation of the gas-water layer are determined.
In some embodiments, the control device can test the core of the reservoir by using an unsteady state method to obtain the relative permeability of the core, then determine the water saturation corresponding to the relative permeability by using a compact gas reservoir two-phase seepage calculation method, thereby establishing a gas-water relative permeability curve graph by using the unsteady state method, and then obtain a permeability intersection point between the oil phase relative permeability curve and the water phase relative permeability curve from the gas-water relative permeability curve; the permeability intersection is determined as the critical water saturation of the aqueous-gas layer.
In one embodiment environment, the gas-water relative permeability profile can be a profile as shown in FIG. 3.
It should be noted that, the control device determines the water saturation corresponding to the relative permeability by using the two-phase seepage calculation method of the tight gas reservoir, so that the mode of establishing the gas-water relative permeability curve chart of the unsteady state method can refer to the related technology, and the embodiment of the application will not be described in detail.
In some embodiments, because the single well is limited in hydrocarbon production, the single well is not capable of removing water from the entire gas-water layer, and therefore the control device needs to determine the single well control area of the target gas well for the gas-water layer based on the fracturing data of the reservoir and the single well drainage radius of the target gas well.
As one example, the control device can determine a single well control radius for the target gas well for the gas-water layer based on the fracturing data of the reservoir and the single well drainage radius of the target gas well, and then determine a single well control area based on the single well control radius and an area calculation formula.
In some embodiments, the operation of the control device to determine the thickness, porosity, and original water saturation of the gas-water layer from the log data comprises at least: acquiring the thickness of a gas-water layer from logging data, and acquiring rock electricity experimental data aiming at the gas-water layer; establishing a density and core analysis porosity model according to the relation between the density and the depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer included in the logging data; determining porosity according to the density and core analysis porosity model; and determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
When the gas-water layer is mined, the gas-water layer of the reservoir is usually subjected to the rock electricity parameter experiment, so that rock electricity experiment data are obtained, and the obtained rock electricity experiment data are stored into a storage file in the control equipment or the server through specified operation. When the control device needs to acquire the rock electricity experimental data, the rock electricity experimental data can be acquired from a local storage file or a server storage file.
It should be noted that the rock electric experimental data can include lithology coefficients a and b, and handover indexes m and n, etc., where a is a proportionality coefficient related to lithology, the value range is 0.6-1.5, b is a colloid coefficient for lithology, m varies with different degrees of rock cementation, the value range is 1.5-3, and n is a saturation index.
Since after logging, log data is typically obtained, the log data includes various information about the production well and reservoir of interest, including, for example, the relationship between the density and depth of the gas-water layer, the thickness of the gas-water layer, and so forth. Thus, the control device can acquire the thickness of the gas-water layer, the relation between the purpose of the gas-water layer and the depth, and the like from the logging data.
In some embodiments, the control device may store core analysis data, perform text analysis processing on the core analysis data to obtain a porosity of the depth and the gas-water layer, and then establish a density and core analysis porosity model according to a relationship between a density and a depth of the gas-water layer and a correspondence between the depth and the porosity of the gas-water layer included in the logging data, and determine the porosity according to the density and the core analysis porosity model.
In one implementation, the density and core analysis porosity model can be a schematic diagram as shown in fig. 4.
It should be noted that, the control device establishes the operation of the density and core analysis porosity model according to the relationship between the density and the depth of the gas-water layer and the corresponding relationship between the depth and the porosity of the gas-water layer included in the logging data, and determines the operation of the porosity according to the density and core analysis porosity model, which can refer to the related art, and the embodiments of the present application will not be repeated.
In one embodiment, the Alqi formula is as follows.
In the above Alqi formula (1), S w Is the original water saturation of the air-water layer, a, b, n, m is the rock electrical parameter of the rock, R w For formation water resistivity, Φ is the porosity of the rock in the gas-water layer, R t Is the formation resistivity of the gas-water layer.
Step 203: the control device determines a target displacement for drainage through the target gas well based on the reservoir information.
As one example, the control device can determine a first displacement in the gas-water layer for which the target gas well is being produced based on the critical water saturation of the gas-water layer, the single well control area, the porosity, thickness, and original water saturation of the gas-water layer; adding the first drainage amount and the transformed well logging liquid amount to obtain the target drainage amount.
Since the reservoir is usually rebuilt by adding a rebuilding fluid to the target gas well when performing the address exploration, the rebuilding fluid to be counted needs to be removed when draining, and therefore, when determining the target drainage, the first drainage needs to be added to the rebuilding fluid amount.
As one example, the control apparatus can also determine the target displacement by the following displacement calculation formula.
W e ＝A * H * Φ * (S w -C)+W p (2)
In the above water discharge amount calculation formula (2), W e For the target displacement, A is the control area of a single well, H is the thickness of the gas-water layer, phi is the porosity of the rock in the gas-water layer, S w The original water saturation of the air-water layer is C is critical water saturation, W p To reform the well fluid volume.
Step 204: the control device controls the shaft of the target gas well to drain water according to the target drainage amount.
As one example, the control device is capable of controlling the wellbore of the target gas well to drain at a first drainage rate; and stopping draining when the draining amount reaches the draining amount.
As one example, a drainage pump can be installed in a wellbore of a target gas well, and a control device can control the drainage pump to drain the target gas well.
It should be noted that the first discharge speed can be set in advance according to the need, for example, the first discharge speed can be 50 cubic meters/hour, 30 cubic meters/hour, or the like.
In some embodiments, the control device is further capable of controlling the displacement of water out of the target gas well for a predetermined period of time.
It should be noted that the preset duration may be set in advance according to the requirement, for example, the preset duration may be 2 days, 3 days, or the like.
In some embodiments, the control device can prompt the operator that the target gas well is finished draining after the target amount of water is drained.
The prompt information can be text, image, voice, video, or the like.
In the embodiment of the application, the control equipment can determine the critical water saturation by using the permeability curve, and determine the reasonable drainage amount of the gas-water layer for the target gas well by combining the control area of a single well, the thickness, the porosity of the gas-water layer, the original water saturation and the reconstruction well-entering liquid amount of the reservoir, and drain water according to the determined drainage amount, so that the effective utilization of the gas-water layer is realized, the productivity of the single well is improved, and meanwhile, the damage to the reservoir is avoided.
Fig. 5 is a schematic structural diagram of a drainage control device for an air-water layer according to an embodiment of the present application, where the drainage control device for an air-water layer may be implemented by software, hardware, or a combination of both. The drainage control device of the air-water layer may include: an acquisition module 501, a determination module 502 and a control module 503.
An obtaining module 501, configured to obtain reservoir information of a reservoir where a target gas well is located, where the target gas well is a production well that produces a gas-water layer of the reservoir;
a determining module 502 for determining a target drainage volume for drainage through the target gas well based on the reservoir information;
a control module 503 for controlling the well bore of the target gas well to drain according to the target drainage amount.
In some embodiments, referring to fig. 6, the obtaining module 501 includes:
a first obtaining submodule 5011 for obtaining fracturing data for fracturing the reservoir, a gas-water relative permeability curve of the reservoir and logging data of the target gas well;
a second obtaining submodule 5012, configured to obtain a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from a gas-water relative permeability curve of the reservoir;
a first determination submodule 5013 for determining the permeability intersection point as a critical water saturation of the gas-water layer;
a second determination submodule 5014 for determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
A third determination submodule 5015 is used for determining the thickness, the porosity and the original water saturation of the gas-water layer according to the logging data.
In some embodiments, the third determination submodule 5015 is configured to:
acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer;
determining the porosity according to the density and core analysis porosity model;
and determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
In some embodiments, the reservoir information includes critical water saturation of the gas-water layer, single well control area, porosity, thickness of the gas-water layer, original water saturation of the gas-water layer, and a retrofit well logging fluid volume of the reservoir;
referring to fig. 7, the determining module 502 includes:
a fourth determination submodule 5021 for determining a first displacement in the gas-water layer for exploitation of the target gas well according to the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness and the original water saturation of the gas-water layer;
And a calculating submodule 5022, configured to add the first drainage amount to the modified well logging fluid amount to obtain the target drainage amount.
In some embodiments, the fourth determining submodule 5021 is configured to:
subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the water saturation difference, the single well control area, the thickness and the porosity to obtain the first displacement.
In some embodiments, referring to fig. 8, the control module 503 includes:
a first control submodule 5031 for controlling the drainage of the well bore of the target gas well at a first drainage rate;
a second control sub-module 5032 for stopping the drainage when the discharge amount reaches the discharge amount.
In the embodiment of the application, the control equipment can determine the critical water saturation by using the permeability curve, and determine the reasonable drainage amount of the gas-water layer for the target gas well by combining the control area of a single well, the thickness, the porosity of the gas-water layer, the original water saturation and the reconstruction well-entering liquid amount of the reservoir, and drain water according to the determined drainage amount, so that the effective utilization of the gas-water layer is realized, the productivity of the single well is improved, and meanwhile, the damage to the reservoir is avoided.
It should be noted that: the device for controlling the drainage of the air-water layer provided in the above embodiment only exemplifies the division of the above functional modules when controlling the drainage of the air-water layer, and in practical application, the above functional allocation may be completed by different functional modules according to needs, i.e. the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the drainage control device for the air-water layer provided in the above embodiment and the drainage control method embodiment for the air-water layer belong to the same concept, and the specific implementation process is detailed in the method embodiment, which is not described herein again.
Fig. 9 shows a block diagram of a control apparatus 900 provided in an exemplary embodiment of the present application. The control device 900 may be: smart phones, tablet computers, notebook computers or desktop computers. The control device 900 may also be referred to by other names as user device, portable control device, laptop control device, desktop control device, etc.
Generally, the control apparatus 900 includes: a processor 901 and a memory 902.
Processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 901 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 901 may also include a main processor and a coprocessor, the main processor being a processor for processing data in an awake state, also referred to as a CPU (Central Processing Unit ); a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 901 may integrate a GPU (Graphics Processing Unit, image processor) for taking care of rendering and drawing of content that the display screen needs to display. In some embodiments, the processor 901 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.
The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 902 is used to store at least one instruction for execution by processor 901 to implement a method of controlling drainage of an aqueous and air layer provided by an embodiment of the method of the present application.
In some embodiments, the control device 900 may further optionally include: a peripheral interface 903, and at least one peripheral. The processor 901, memory 902, and peripheral interface 903 may be connected by a bus or signal line. The individual peripheral devices may be connected to the peripheral device interface 903 via buses, signal lines, or circuit boards. Specifically, the peripheral device includes: at least one of radio frequency circuitry 904, a display 905, a camera assembly 906, audio circuitry 907, a positioning assembly 908, and a power source 909.
The peripheral interface 903 may be used to connect at least one peripheral device associated with an I/O (Input/Output) to the processor 901 and the memory 902. In some embodiments, the processor 901, memory 902, and peripheral interface 903 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 901, the memory 902, and the peripheral interface 903 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.
The Radio Frequency circuit 904 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 904 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 904 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 904 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuit 904 may communicate with other control devices via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity ) networks. In some embodiments, the radio frequency circuit 904 may also include NFC (Near Field Communication ) related circuits, which the present application is not limited to.
The display 905 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 905 is a touch display, the display 905 also has the ability to capture touch signals at or above the surface of the display 905. The touch signal may be input as a control signal to the processor 901 for processing. At this time, the display 905 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 905 may be one, providing a front panel of the control device 900; in other embodiments, the display 905 may be at least two, respectively disposed on different surfaces of the control device 900 or in a folded design; in other embodiments, the display 905 may be a flexible display disposed on a curved surface or a folded surface of the control device 900. Even more, the display 905 may be arranged in an irregular pattern other than rectangular, i.e., a shaped screen. The display 905 may be made of LCD (Liquid Crystal Display ), OLED (Organic Light-Emitting Diode) or other materials.
The camera assembly 906 is used to capture images or video. Optionally, the camera assembly 906 includes a front camera and a rear camera. Typically, the front camera is disposed on a front panel of the control device, and the rear camera is disposed on a rear surface of the control device. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and Virtual Reality (VR) shooting function or other fusion shooting functions. In some embodiments, camera assembly 906 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.
The audio circuit 907 may include a microphone and a speaker. The microphone is used for collecting sound waves of users and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 901 for processing, or inputting the electric signals to the radio frequency circuit 904 for voice communication. For purposes of stereo acquisition or noise reduction, the microphone may be multiple, each disposed at a different location of the control device 900. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 901 or the radio frequency circuit 904 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, the audio circuit 907 may also include a headphone jack.
The location component 908 is used to locate the current geographic location of the control device 900 to enable navigation or LBS (Location Based Service, location-based services). The positioning component 908 may be a positioning component based on the United states GPS (Global Positioning System ), the Beidou system of China, the Granati system of Russia, or the Galileo system of the European Union.
The power supply 909 is used to supply power to the various components in the control apparatus 900. The power supply 909 may be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 909 includes a rechargeable battery, the rechargeable battery can support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.
In some embodiments, the control device 900 further includes one or more sensors 910. The one or more sensors 910 include, but are not limited to: acceleration sensor 911, gyroscope sensor 912, pressure sensor 913, fingerprint sensor 914, optical sensor 915, and proximity sensor 916.
The acceleration sensor 911 can detect the magnitudes of accelerations on three coordinate axes of the coordinate system established by the control device 900. For example, the acceleration sensor 911 may be used to detect components of gravitational acceleration in three coordinate axes. The processor 901 may control the display 905 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal acquired by the acceleration sensor 911. The acceleration sensor 911 may also be used for the acquisition of motion data of a game or a user.
The gyro sensor 912 may detect a body direction and a rotation angle of the control apparatus 900, and the gyro sensor 912 may collect a 3D motion of the user on the control apparatus 900 in cooperation with the acceleration sensor 911. The processor 901 may implement the following functions according to the data collected by the gyro sensor 912: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.
The pressure sensor 913 may be provided at a side frame of the control device 900 and/or at a lower layer of the display 905. When the pressure sensor 913 is provided at the side frame of the control device 900, a grip signal of the control device 900 by the user may be detected, and the processor 901 performs left-right hand recognition or quick operation according to the grip signal collected by the pressure sensor 913. When the pressure sensor 913 is provided at the lower layer of the display 905, the processor 901 performs control of the operability control on the UI interface according to the pressure operation of the user on the display 905. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.
The fingerprint sensor 914 is used for collecting the fingerprint of the user, and the processor 901 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 914, or the fingerprint sensor 914 identifies the identity of the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, the processor 901 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 914 may be provided on the front, back or side of the control device 900. When a physical key or vendor Logo is provided on the control device 900, the fingerprint sensor 914 may be integrated with the physical key or vendor Logo.
The optical sensor 915 is used to collect the intensity of ambient light. In one embodiment, the processor 901 may control the display brightness of the display panel 905 based on the intensity of ambient light collected by the optical sensor 915. Specifically, when the ambient light intensity is high, the display luminance of the display screen 905 is turned up; when the ambient light intensity is low, the display luminance of the display panel 905 is turned down. In another embodiment, the processor 901 may also dynamically adjust the shooting parameters of the camera assembly 906 based on the ambient light intensity collected by the optical sensor 915.
A proximity sensor 916, also referred to as a distance sensor, is typically provided on the front panel of the control device 900. The proximity sensor 916 is used to capture the distance between the user and the front face of the control device 900. In one embodiment, when the proximity sensor 916 detects that the distance between the user and the front face of the control device 900 gradually decreases, the processor 901 controls the display 905 to switch from the bright screen state to the off screen state; when the proximity sensor 916 detects that the distance between the user and the front face of the control device 900 gradually increases, the display screen 905 is controlled by the processor 901 to switch from the off-screen state to the on-screen state.
It will be appreciated by those skilled in the art that the configuration shown in fig. 9 is not limiting of the control device 900 and may include more or fewer components than shown, or may combine certain components, or may employ a different arrangement of components.
The embodiment of the present application also provides a non-transitory computer readable storage medium, which when executed by a processor of a control apparatus, enables the control apparatus to perform the drainage control method of the air-water layer provided in the above embodiment.
The embodiment of the application also provides a computer program product containing instructions, which when run on a control device, cause the control device to execute the water-gas layer drainage control method provided by the embodiment.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The foregoing description of the preferred embodiments of the present application is not intended to limit the embodiments of the present application, but is intended to cover any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the embodiments of the present application.
Claims (11)
1. A method for controlling drainage of an aqueous-air layer, the method comprising:
Acquiring reservoir information of a reservoir where a target gas well is located, wherein the target gas well is a production well for producing a gas-water layer of the reservoir, and the reservoir information comprises critical water saturation of the gas-water layer, single well control area, porosity and thickness of the gas-water layer, original water saturation of the gas-water layer and reconstruction well-entering liquid amount of the reservoir;
determining a first displacement in the gas-water layer for exploitation of the target gas well according to the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness and the original water saturation of the gas-water layer;
adding the first drainage amount and the transformed well logging liquid amount to obtain a target drainage amount;
and controlling the shaft of the target gas well to drain according to the target drainage amount.
2. The method of claim 1, wherein the obtaining reservoir information for the reservoir in which the target gas well is located comprises:
acquiring fracturing data for fracturing the reservoir, a gas-water relative permeability curve of the reservoir and logging data of the target gas well;
acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from a gas-water relative permeability curve of the reservoir;
Determining the permeability intersection as the critical water saturation of the gas-water layer;
determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
and determining the thickness, the porosity and the original water saturation of the gas-water layer according to the logging data.
3. The method of claim 2, wherein said determining the thickness, porosity, and original water saturation of the gas-water layer from the logging data comprises:
acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer;
determining the porosity according to the density and core analysis porosity model;
and determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
4. The method of claim 1, wherein said determining a first displacement in the gas-water layer for which the target gas well is to be produced based on the critical water saturation of the gas-water layer, a single well control area, the porosity, thickness, and the raw water saturation of the gas-water layer comprises:
Subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the water saturation difference, the single well control area, the thickness and the porosity to obtain the first displacement.
5. The method of claim 1, wherein controlling the wellbore of the target gas well to drain in accordance with the target drainage comprises:
controlling a shaft of the target gas well to drain water according to a first drainage speed;
and stopping draining when the discharge amount reaches the target discharge amount.
6. A device for controlling drainage of an aqueous-air layer, the device comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring reservoir information of a reservoir where a target gas well is located, the target gas well is a production well for producing a gas-water layer of the reservoir, and the reservoir information comprises critical water saturation of the gas-water layer, single well control area, porosity and thickness of the gas-water layer, original water saturation of the gas-water layer and reconstruction well-entering liquid amount of the reservoir;
the determining module comprises: a fourth determination submodule for determining a first displacement in the gas-water layer aimed at the exploitation of the target gas well according to the critical water saturation of the gas-water layer, the single well control area, the porosity, the thickness and the original water saturation of the gas-water layer;
The determination module further includes: the calculation submodule is used for adding the first drainage amount and the transformed well logging liquid amount to obtain target drainage amount;
and the control module is used for controlling the shaft of the target gas well to drain water according to the target drainage amount.
7. The apparatus of claim 6, wherein the acquisition module comprises:
the first acquisition submodule is used for acquiring fracturing data for fracturing the reservoir, a gas-water relative permeability curve graph of the reservoir and logging data of the target gas well;
the second acquisition submodule is used for acquiring a permeability intersection point between an oil phase relative permeability curve and an aqueous phase relative permeability curve from the gas-water relative permeability curve of the reservoir;
the determination module further includes: a first determination sub-module for determining the permeability intersection as a critical water saturation of the gas-water layer;
a second determination submodule for determining a single well control area of the target gas well for the gas-water layer according to the fracturing data of the reservoir and the single well drainage radius of the target gas well;
and a third determination submodule for determining the thickness, the porosity and the original water saturation of the gas-water layer according to the logging data.
8. The apparatus of claim 7, wherein the third determination submodule is to:
acquiring the thickness of the gas-water layer from the logging data, and acquiring rock electricity experimental data aiming at the gas-water layer;
establishing a density and core analysis porosity model according to the relation between the density and depth of the gas-water layer and the corresponding relation between the depth and the porosity of the gas-water layer;
determining the porosity according to the density and core analysis porosity model;
and determining the original water saturation of the gas-water layer according to the porosity and the rock electricity experimental data by an Archie formula.
9. The apparatus of claim 6, wherein the fourth determination submodule is to:
subtracting the critical water saturation from the original water saturation to obtain a water saturation difference;
multiplying the water saturation difference, the single well control area, the thickness and the porosity to obtain the first displacement.
10. The apparatus of claim 6, wherein the control module comprises:
a first control sub-module for controlling the wellbore of the target gas well to drain at a first drain rate;
And a second control sub-module for stopping the drainage when the discharge amount reaches the target drainage amount.
11. A computer storage medium having stored thereon instructions which, when executed by a processor, implement the steps of the method of any of the preceding claims 1 to 5.
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