CN114165201A - Pressure flooding water injection method - Google Patents

Pressure flooding water injection method Download PDF

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Publication number
CN114165201A
CN114165201A CN202111327031.4A CN202111327031A CN114165201A CN 114165201 A CN114165201 A CN 114165201A CN 202111327031 A CN202111327031 A CN 202111327031A CN 114165201 A CN114165201 A CN 114165201A
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well
pressure
water injection
parameters
flooding
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CN114165201B (en
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石刚
张健
陶良军
冯海船
薛旭周
罗于建
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Jereh Energy Services Corp
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Jereh Energy Services Corp
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20Displacing by water
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/06Measuring temperature or pressure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/40Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping

Abstract

The application relates to the field of oilfield development, in particular to a pressure flooding water injection method, which is used for solving the problem that water channeling easily occurs in a pressure flooding well. A method for pressure flooding water injection comprises the steps of obtaining a well group, wherein the well group comprises a plurality of pressure flooding wells, and determining a target pressure flooding well from the well group; setting pressure flooding water injection parameters according to a target pressure flooding well; and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters. The application is used for pressure flooding water injection.

Description

Pressure flooding water injection method
Technical Field
The application relates to the field of oilfield development, in particular to a pressure flooding water injection method.
Background
Pressure flooding water injection is water injection rapidly through super-rupture pressure and high discharge capacity, water quantity of conventional water injection for several years or even more than ten years is injected in a very short time, a high-pressure area is formed around a water injection well, peripheral oil wells are closed in the pressure flooding water injection process and the pressure diffusion process, and pressure is diffused slowly and uniformly as much as possible. Pressure flooding water injection is an effective technical means for improving the development effect of low-permeability, ultra-low-permeability and compact oil reservoirs. But due to the influence of factors such as heterogeneity of reservoirs, ground stress direction, structural condition, ancient river channel direction, formation fluid properties, high pumping pressure and the like.
In the process of realizing the pressure flooding water injection, at least the following problems exist: the problem of water channeling easily occurs in the pressure flooding well.
Disclosure of Invention
The embodiment of the application provides a method for pressure flooding water injection, which is used for solving the problem that a pressure flooding well is easy to cause water channeling.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, an embodiment of the present application provides a method for pressure flooding water injection, including:
obtaining a well group, wherein the well group comprises a plurality of pressure drive wells, and determining a target pressure drive well from the well group;
setting pressure flooding water injection parameters according to a target pressure flooding well; and
and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters.
The method of water injection is driven in pressure that this application embodiment provided, drives the well through a plurality of pressures to in the well group, selects the target pressure to drive the well to set up the pressure and drive the water injection parameter, drive the water injection parameter according to the pressure, drive the well to the target pressure and carry out the pressure and drive the water injection, thereby solve the pressure and drive the problem that the well easily appears water scurring.
Optionally, determining the target pressure-flooding well from the well group comprises:
establishing a geological model of the well group;
acquiring geological parameters of the well group according to the geological model; wherein the geological parameters include: ancient river channel parameters, sedimentary facies, stratum connectivity parameters, geological structure parameters, fault parameters and natural fracture parameters; and
and analyzing the geological parameters according to the pressure drive anti-channeling preset conditions, and determining a target pressure drive well from the well group according to the analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value.
Optionally, determining the target pressure-flooding well from the well group comprises:
establishing an oil reservoir numerical model of the well group, and acquiring oil reservoir parameters of the well group according to the oil reservoir numerical model; wherein, the oil reservoir parameters include: the method comprises the following steps of (1) obtaining an effect parameter of oil well water injection, a parameter of reservoir heterogeneity, a parameter of reservoir sensitivity, a parameter of oil well production condition, a parameter of stratum sand production condition, a parameter of water drive front advancing condition and a parameter of bottom water condition; and
and analyzing the oil reservoir numerical model according to a pressure drive anti-channeling preset condition, and determining a target pressure drive well from the well group according to an analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value.
Optionally, after the target pressure-flooding well is determined from the well group, the method further comprises:
acquiring and determining reservoir optimization parameters according to the reservoir numerical model; the oil reservoir optimization parameters comprise the stratum pressure recovery degree, water drive front edge propulsion dynamic parameters, the pressure conduction direction and the well opening time of an oil well;
performing pressure flooding water injection on a target pressure flooding well comprises:
and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters and the oil reservoir optimization parameters.
Optionally, obtaining and determining the formation pressure recovery degree according to the numerical reservoir model includes:
determining periodic water injection quantity, water injection speed and turnover time according to oil reservoir optimization parameters;
and determining the stratum pressure recovery degree according to the periodic water injection quantity, the water injection speed and the revolution opportunity.
Optionally, after the target pressure-flooding well is determined from the well group, the method further comprises:
in field implementation, according to the pressure parameter, the liquid level parameter, the yield parameter and the water content parameter of the oil well, the dynamic reaction parameter of the oil well is obtained, and the pumping program and the anti-channeling slug are determined and adjusted.
Optionally, the well dynamic response parameters include: and the crack direction parameter, the river channel direction parameter, the deficit parameter and the oil well pressure drive process with the effect of early water injection need to be closed in the whole process so as to determine the pressure balance transmission.
Optionally, acquiring the rise of the oil well pressure parameter comprises:
the method comprises the following steps of adopting a well with overpressure channeling and injection channeling in the early fracturing and injection operation process of an adjacent well and a water injection well, automatically monitoring a single well in real time in an oil extraction work area in the water injection construction operation, and giving an alarm in a system when the pressure rises;
in the water injection construction operation, an oil extraction work area is responsible for monitoring pressure, water content and liquid production amount, the pressure monitoring frequency is not lower than 1 day/time, and the water content recording frequency is 5 days/time;
if the pressure is rapidly increased to more than 5MPa and the casing pressure increase is more than or equal to 0.1MPa/h during the water injection construction operation, stopping the injection of the water injection well, and performing blowout prevention treatment on the injection channeling well by an operation team;
when the pressure slowly rises within 5MPa and the casing pressure amplitude is less than 0.1MPa/h, the water injection well is normally constructed, the operation team closes the injection channeling well or performs blowout prevention treatment, the pressure does not rise but the water content rises, and whether the well is closed or not is determined by the oil reservoir.
In a second aspect, an embodiment of the present application provides a computer device, including a memory, a processor; the memory has stored thereon a computer program operable on the processor, which when executed implements the method as described above.
In a third aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method as above.
Drawings
Fig. 1 is a schematic diagram of a pressure flooding well small-layer communication provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of reservoir water absorption provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of oil production of a reservoir provided by an embodiment of the present application;
FIG. 4 is a cross-sectional residual oil saturation profile provided by an embodiment of the present application;
FIG. 5 is a graph illustrating predicted cumulative oil production for various water injection schemes provided by embodiments of the present application;
FIG. 6 is a graph illustrating a predicted cumulative oil production at different revolutions according to an embodiment of the present disclosure;
FIG. 7 is a graph illustrating a predicted cumulative oil production for a well group at different injection rates according to an embodiment of the present application;
FIG. 8 is a graph illustrating a residual oil saturation field profile after a pressure flood as provided in an embodiment of the present application;
FIG. 9 is a graph of stress and barrier analysis provided in accordance with an embodiment of the present application;
FIG. 10 is a graph of fracture propagation pattern analysis provided in accordance with an embodiment of the present application;
fig. 11 is a design pattern diagram of a pressure flooding, channeling-preventing, and flooding slug, provided by an embodiment of the present application.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The embodiment of the application provides a pressure flooding water injection method which comprises the steps of obtaining a well group, wherein the well group comprises a plurality of pressure flooding wells, and determining a target pressure flooding well from the well group; setting pressure flooding water injection parameters according to a target pressure flooding well; and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters.
The method for pressure flooding water injection provided by the embodiment of the application selects the target pressure flooding well through a plurality of pressure flooding wells in the well group, thereby setting pressure flooding water injection parameters, and according to the pressure flooding water injection parameters, performing pressure flooding water injection on the target pressure flooding well, thereby solving the problem that the pressure flooding well is easy to have water channeling.
In some embodiments of the present application, determining a target pressure drive well from a group of wells comprises: establishing a geological model of the well group; acquiring geological parameters of the well group according to the geological model; wherein the geological parameters include: ancient river channel parameters, sedimentary facies, stratum connectivity parameters, geological structure parameters, fault parameters and natural fracture parameters; and analyzing the geological parameters according to the pressure drive anti-channeling preset conditions, and determining a target pressure drive well from the well group according to the analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value.
Referring to fig. 1, the water injection well 56099 is shown in good communication with surrounding wells 56098, 56100 and 5D6097 in sub-zones S11, S21 and S42, which will be the major monitoring zones during water injection and where measures to prevent and control water channeling will also be developed. The connectivity between the oil-water wells refers to the connectivity degree of sand bodies between the oil-water wells, and comprises parameters such as the thickness, the permeability, the porosity and the oil saturation of the sand bodies. The pressure flooding water injection requires good connectivity of an oil-water well and is convenient to take effect. Referring to the figure 1, three sets of small sand bodies in S11 and S21 small layers have large thickness, stable development, obvious gyration characteristic and stable distribution of interlayer, and have better continuity along the direction of a source and vertical to the source than the S42 and S51 small layers, and the continuity of the S3 two sets of small layers is relatively poorer.
In some embodiments of the present application, determining a target pressure drive well from a group of wells comprises: establishing an oil reservoir numerical model of the well group, and acquiring oil reservoir parameters of the well group according to the oil reservoir numerical model; wherein, the oil reservoir parameters include: the method comprises the following steps of (1) obtaining an effect parameter of oil well water injection, a parameter of reservoir heterogeneity, a parameter of reservoir sensitivity, a parameter of oil well production condition, a parameter of stratum sand production condition, a parameter of water drive front advancing condition and a parameter of bottom water condition; and analyzing the oil reservoir numerical model according to a pressure drive anti-channeling preset condition, and determining a target pressure drive well from the well group according to an analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value. Fig. 2 and 3 are diagrams for analyzing the current oil reservoir dynamic and static conditions by geological modeling and numerical simulation methods. Referring to fig. 2, a water injection well 56099 is shown, and referring to fig. 3, a production well 56098 is shown. In the layer which does not absorb water or absorbs water poorly in the figure 3, the residual oil in the part is not used, and the oil in the part needs to be used, and simultaneously, the water injection is prevented or controlled from going to the layer which absorbs water well. In fig. 3: the dark gray part represents water positions which are flooded, the development and utilization values are not large, and the light gray part of the lower part represents that the residual oil saturation is high, so that the method is a key diving object.
Referring to fig. 2, the S3 layer is the main water-absorbing interval, while the drainage radius of the S3 layer is shown from the well head, which indicates that water channeling is likely to occur during the S3 layer flooding water injection, and will be the main interval for preventing and controlling water channeling. Referring to the distribution of the residual oil saturation represented by fig. 4, the lighter grey represents the residual oil saturation, the greater the measure potential is, the more worthy of construction is, otherwise, the region is not suitable for pressure drive water injection, and the region with the lower residual oil saturation in fig. 3 shows that the conventional water drive is sufficient, the injected water occupies the original pore space, the space is more prone to water channeling, and important consideration needs to be given in the process of compiling the scheme.
In some embodiments of the present application, after determining the target pressure drive well from the group of wells, the method further comprises: acquiring and determining reservoir optimization parameters according to the reservoir numerical model; the oil reservoir optimization parameters comprise the stratum pressure recovery degree, water drive front edge propulsion dynamic parameters, the pressure conduction direction and the well opening time of an oil well; performing pressure flooding water injection on a target pressure flooding well comprises: and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters and the oil reservoir optimization parameters. According to the numerical reservoir model, acquiring and determining the stratum pressure recovery degree comprises the following steps: determining periodic water injection quantity, water injection speed and turnover time according to oil reservoir optimization parameters; and determining the stratum pressure recovery degree according to the periodic water injection quantity, the water injection speed and the revolution opportunity.
Referring to fig. 5, the optimal water injection amount is optimized, if the water injection amount is too small, a good effect cannot be achieved, and if the water injection amount is too large, water channeling is easily caused, so that the productivity of an oil well is affected, and the development effect is reduced. Therefore, the reasonable water injection amount has great significance for preventing the pressure drive water channeling. Reference is made to fig. 6 for providing a basis for obtaining an optimal transfer period, which is mainly used for providing a basis for next water injection.
If the turnaround time is short, the formation pressure is recovered too much, water channeling is easy to occur, and the productivity of an oil well is influenced, so that the development effect is influenced; if the turnaround time is too long, the formation pressure drops quickly, and the oil well productivity is insufficient, which also affects the development effect.
Referring to FIG. 7, the water injection speed is low, so that cracks cannot be generated in the stratum, and the purpose of pressure flooding water injection cannot be achieved; the water injection speed is too high, so that large cracks are formed in the stratum, and water channeling is caused at a high probability. Therefore, a reasonable injection rate is important to prevent water channeling. The distribution condition of crude oil between oil-water wells can be qualitatively and quantitatively described by referring to the saturation field distribution diagram shown in FIG. 8, and a basis is provided for the evaluation of the measure effect.
The final distribution of the residual oil saturation field is based on the determined parameters (water injection amount, water injection speed, revolution timing and the like), and the residual oil saturation distribution after implementation, which is predicted by adopting a numerical simulation method, can be compared with the saturation distribution before implementation of the pressure flooding water injection to evaluate the measure effect. Fig. 8 mainly shows a final saturation remaining diagram of the oil reservoir after a series of pressure flooding water channeling prevention methods are adopted, and it can be seen from fig. 8 that each small layer is displaced uniformly, water channeling does not occur obviously, and the pressure flooding effect is good.
In addition, in the aspect of engineering, according to the parameters of pressure flooding water injection, the crack extension mode is researched through rock stress analysis and interlayer analysis, and the crack extension direction and scale are judged. It can be obtained from the barrier and stress analysis as shown with reference to FIG. 9: interlayer distribution and thickness, small layer stress, Poisson's ratio, Young's modulus and other parameters. The method is mainly used for judging the fracture initiation condition of the stratum. The graph 9 is mainly used for judging the fracture initiation condition of the formation fracture, analyzing the fracture trend and providing guidance for preventing the pressure channeling. 5# -1 reservoir stress: 44MPa, upper barrier stress: -50.5MPa, mudstone interlayer stress: 49MPa, and the stress of the lower interlayer is 45-50 MPa; 5# -2 reservoir stress: 45MPa below zero, the stress of an upper interlayer is 48 to 49MPa, and the stress of a lower interlayer is 48.5 to 50 MPa; oil layer stress No. 6: 47MPa, upper barrier stress: 47-53MPa, lower interlayer stress: 50-52 MPa.
Referring to fig. 10, fracture parameters such as the length, width and height of the fracture are obtained, and the optimal fracture parameters are determined by combining the parameters with the parameters of pressure flooding water injection, so that water channeling between oil and water wells caused by overlong length of the fracture is prevented.
Referring to fig. 11, a selective profile control water plugging slug is designed and added in the main crack forming direction to form temporary plugging of a large channel, so that water flow steering is realized, the formation of a water channeling channel is prevented, in addition, optimization is performed on a pumping program, and reasonable pumping pressure and construction displacement are designed according to different pumping stages through detailed engineering data analysis of blocks, as shown in the following table 1:
TABLE 1
Figure BDA0003347267150000071
In some embodiments of the present application, after determining the target pressure drive well from the group of wells, the method further comprises: in field implementation, according to the pressure parameter, the liquid level parameter, the yield parameter and the water content parameter of the oil well, the dynamic reaction parameter of the oil well is obtained, and the pumping program and the anti-channeling slug are determined and adjusted. The oil well dynamic reaction parameters include: and the crack direction parameter, the river channel direction parameter, the deficit parameter and the oil well pressure drive process with the effect of early water injection need to be closed in the whole process so as to determine the pressure balance transmission. Acquiring the rise of the oil well pressure parameter comprises the following steps: the method comprises the following steps of adopting a well with overpressure channeling and injection channeling in the early fracturing and injection operation process of an adjacent well and a water injection well, automatically monitoring a single well in real time in an oil extraction work area in the water injection construction operation, and giving an alarm in a system when the pressure rises; in the water injection construction operation, an oil extraction work area is responsible for monitoring pressure, water content and liquid production amount, the pressure monitoring frequency is not lower than 1 day/time, and the water content recording frequency is 5 days/time;
if the pressure is rapidly increased to more than 5MPa and the casing pressure increase is more than or equal to 0.1MPa/h during the water injection construction operation, stopping the injection of the water injection well, and performing blowout prevention treatment on the injection channeling well by an operation team; when the pressure slowly rises within 5MPa and the casing pressure amplitude is less than 0.1MPa/h, the water injection well is normally constructed, the operation team closes the injection channeling well or performs blowout prevention treatment, the pressure does not rise but the water content rises, and whether the well is closed or not is determined by the oil reservoir.
The embodiment of the application provides computer equipment, which comprises a memory and a processor; the memory is stored with a computer program that can be run on the processor, and the processor implements the method of pressure drive water injection when executing the computer program. In addition, the embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method for pressure flooding water injection.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A method of pressure flooding water injection, comprising:
obtaining a well group, wherein the well group comprises a plurality of pressure drive wells, and determining a target pressure drive well from the well group;
setting pressure flooding water injection parameters according to the target pressure flooding well; and
and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters.
2. A method of pressure flood flooding as claimed in claim 1 wherein said identifying a target pressure flood well from said set of wells comprises:
establishing a geological model of the well group;
acquiring geological parameters of the well group according to the geological model; wherein the geological parameters include: ancient river channel parameters, sedimentary facies, stratum connectivity parameters, geological structure parameters, fault parameters and natural fracture parameters; and
and analyzing the geological parameters according to a pressure drive anti-channeling preset condition, and determining a target pressure drive well from the well group according to an analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value.
3. A method of pressure flood flooding as claimed in claim 1 wherein said identifying a target pressure flood well from said set of wells comprises:
establishing an oil reservoir numerical model of the well group, and acquiring oil reservoir parameters of the well group according to the oil reservoir numerical model; wherein the reservoir parameters include: the method comprises the following steps of (1) obtaining an effect parameter of oil well water injection, a parameter of reservoir heterogeneity, a parameter of reservoir sensitivity, a parameter of oil well production condition, a parameter of stratum sand production condition, a parameter of water drive front advancing condition and a parameter of bottom water condition; and
and analyzing the numerical reservoir model according to a pressure drive anti-channeling preset condition, and determining a target pressure drive well from the well group according to an analysis result so that the probability of pressure drive water channeling of the target pressure drive well is smaller than a preset threshold value.
4. A method of pressure flood flooding water as claimed in claim 3 wherein said method, after identifying a target pressure flood well from said set of wells, further comprises:
acquiring and determining reservoir optimization parameters according to the reservoir numerical model; the reservoir optimization parameters comprise formation pressure recovery degree, water drive front propulsion dynamic parameters, pressure conduction direction and well opening time of an oil well;
performing pressure flooding water injection on the target pressure flooding well comprises:
and performing pressure flooding water injection on the target pressure flooding well according to the pressure flooding water injection parameters and the oil reservoir optimization parameters.
5. The method of pressure flooding water injection of claim 4, wherein obtaining and determining a formation pressure recovery level according to the numerical reservoir model comprises:
determining periodic water injection quantity, water injection speed and turnover time according to the oil reservoir optimization parameters;
and determining the stratum pressure recovery degree according to the periodic water injection quantity, the water injection speed and the turnover time.
6. A method of pressure flood flooding water as claimed in claim 5 wherein said method, after identifying a target pressure flood well from said set of wells, further comprises:
in field implementation, according to the pressure parameter, the liquid level parameter, the yield parameter and the water content parameter of the oil well, the dynamic reaction parameter of the oil well is obtained, and the pumping program and the anti-channeling slug are determined and adjusted.
7. A method of pressure flooding water injection as claimed in claim 6 wherein said well dynamic response parameters comprise: and the crack direction parameter, the river channel direction parameter, the deficit parameter and the oil well pressure drive process with the effect of early water injection need to be closed in the whole process so as to determine the pressure balance transmission.
8. The method of pressure flooding water injection of claim 6, wherein acquiring the rise in the well pressure parameter comprises:
the method comprises the following steps of adopting a well with overpressure channeling and injection channeling in the early fracturing and injection operation process of an adjacent well and a water injection well, automatically monitoring a single well in real time in an oil extraction work area in the water injection construction operation, and giving an alarm in a system when the pressure rises;
in the water injection construction operation, an oil extraction work area is responsible for monitoring pressure, water content and liquid production amount, the pressure monitoring frequency is not lower than 1 day/time, and the water content recording frequency is 5 days/time;
if the pressure is rapidly increased to more than 5MPa and the casing pressure increase is more than or equal to 0.1MPa/h during the water injection construction operation, stopping the injection of the water injection well, and performing blowout prevention treatment on the injection channeling well by an operation team;
when the pressure slowly rises within 5MPa and the casing pressure amplitude is less than 0.1MPa/h, the water injection well is normally constructed, the operation team closes the injection channeling well or performs blowout prevention treatment, the pressure does not rise but the water content rises, and whether the well is closed or not is determined by the oil reservoir.
9. A computer device comprising a memory, a processor; the memory has stored thereon a computer program operable on a processor, the processor when executing the computer program implementing the method according to any of claims 1-8.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
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CN110644958A (en) * 2019-09-19 2020-01-03 大庆油田有限责任公司 Well selection and stratum selection method for large-scale flooding fluid injection measure of sandstone reservoir thin difference oil layer water injection well
CN110671082A (en) * 2019-09-19 2020-01-10 大庆油田有限责任公司 Adjustment method for well group after injection of large-dose flooding fluid into water injection well of thin difference oil layer of sandstone reservoir
CN112709558A (en) * 2019-10-25 2021-04-27 中国石油天然气股份有限公司 Method for determining deployment position of steam injection well and method for converting oil reservoir from water drive to steam drive

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CN117005841A (en) * 2023-07-27 2023-11-07 德州学院 Micro-pressure drive intelligent control method, system and readable storage medium
CN117005841B (en) * 2023-07-27 2024-03-01 德州学院 Micro-pressure drive intelligent control method, system and readable storage medium

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