CN116537774A - Method and device for determining reservoir permeability, electronic equipment and storage medium - Google Patents
Method and device for determining reservoir permeability, electronic equipment and storage medium Download PDFInfo
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- 230000035699 permeability Effects 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000003860 storage Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 283
- 238000012360 testing method Methods 0.000 claims abstract description 127
- 238000005553 drilling Methods 0.000 claims abstract description 110
- 238000005086 pumping Methods 0.000 claims abstract description 82
- 230000008569 process Effects 0.000 claims abstract description 34
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000011010 flushing procedure Methods 0.000 claims description 34
- 238000004364 calculation method Methods 0.000 claims description 24
- 230000006641 stabilisation Effects 0.000 claims description 14
- 238000011105 stabilization Methods 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 description 9
- 239000011435 rock Substances 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 4
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- 238000003287 bathing Methods 0.000 description 1
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- 238000005485 electric heating Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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- 238000004080 punching Methods 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
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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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- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/0875—Well testing, e.g. testing for reservoir productivity or formation parameters determining specific fluid parameters
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
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Abstract
The application discloses a method and a device for determining reservoir permeability, electronic equipment and a storage medium, wherein the method comprises the following steps: after the target well drilling is qualified in well washing, controlling a water pump to perform multiple rounds of pumping tests with different pressure differences on the target well drilling; collecting target test parameters of the target drilling in each round of pumping test process, and obtaining attribute parameters of the water sample in the target drilling by analyzing and testing the water sample in the target drilling; the target test parameters comprise water level drop depth and total water inflow in unit time; calculating to obtain a reservoir permeability coefficient of the target well based on target test parameters of the target well in each round of pumping test process; and calculating the reservoir permeability by using the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling.
Description
Technical Field
The present disclosure relates to the field of resource assessment technologies, and in particular, to a method and an apparatus for determining permeability of a reservoir, an electronic device, and a storage medium.
Background
Geothermal resources are clean renewable energy sources with large reserves, high efficiency and good stability, and can be used in various fields of power generation, heating, hot spring bathing, agricultural irrigation and the like. The current efforts in the development of geothermal resources are also increasing. However, before geothermal resources are developed, it is often necessary to evaluate the development potential of geothermal resources.
Reservoir permeability is currently one of the important parameters of the evaluation when evaluating the development potential of geothermal resources. The main means for obtaining the permeability parameters of geothermal reservoirs is to collect rock samples of the corresponding areas to be developed, and then analyze and test the rock samples, so as to determine the permeability of the reservoirs in the areas.
However, collecting a rock sample downhole is relatively difficult, so that a lot of manpower and material resources are required, and analysis and test parameters of the collected rock sample can only accurately reflect the situation of a small local reservoir where the rock sample is located, so that macroscopic performance of the reservoir in the area to be developed cannot be accurately reflected, and thus the accuracy of evaluation of development potential is relatively low.
Disclosure of Invention
Based on the defects of the prior art, the application provides a method and a device for determining the reservoir permeability, electronic equipment and a storage medium, so as to solve the problem that the reservoir permeability obtained by the prior art cannot accurately reflect the macroscopic performance of a reservoir in a region to be developed, and the accuracy of evaluation of development potential is relatively low.
In order to achieve the above object, the present application provides the following technical solutions:
the embodiment of the application provides a method for determining the permeability of a reservoir, which comprises the following steps:
after the target well drilling is qualified in well washing, controlling a water pump to perform multiple rounds of pumping tests with different pressure differences on the target well drilling;
collecting target test parameters of the target drilling in each round of pumping test process, and obtaining attribute parameters of the water sample in the target drilling by analyzing and testing the water sample in the target drilling; the target test parameters comprise water level drop depth and total water inflow in unit time;
calculating to obtain a reservoir permeability coefficient of the target well based on target test parameters of the target well in each round of pumping test process;
and calculating the reservoir permeability by using the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling.
Optionally, in the method for determining the reservoir permeability, after the target well is qualified for well flushing, before the water pump is controlled to perform multiple rounds of pumping tests with different pressure differences on the target well, the method further includes:
controlling a flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to a set rate;
after each flushing of the target well, detecting the bottom sand setting height and the water sample suspended matter content of the target well;
when no sand setting at the bottom of the target well is detected, and the content of suspended matters in a water sample is smaller than the preset content, performing a water pumping test on the target well, and collecting the water temperature and the water volume in the target well in real time;
judging whether the water temperature and the water yield in the target well drilling are stable or not;
and if the water temperature and the water yield in the target well drilling are judged to be stable, determining that well flushing of the target well drilling is qualified.
Optionally, in the method for determining the reservoir permeability, the calculating the reservoir permeability coefficient of the target well based on the target test parameters of the target well in each round of pumping test includes:
calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well;
respectively calculating the difference value of the water level drop of the target well drilling and the difference value of the total water inflow in unit time in the adjacent two-round pumping test process to obtain a plurality of groups of parameter difference values;
based on the total water outlet area of the reservoir, each group of parameter difference values and the pressure drop distance, calculating to obtain reservoir permeability coefficients corresponding to each group of parameter difference values by using Darcy's law; wherein the pressure drop distance is a radius of the target wellbore;
and determining the average value of the reservoir permeability coefficients corresponding to the parameter differences of each group as the reservoir permeability coefficient of the target well.
Optionally, in the method for determining a reservoir permeability, calculating the reservoir permeability by using a reservoir permeability coefficient of the target well and an attribute parameter of a water sample in the target well includes:
and multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well and the gravity acceleration, and dividing the obtained product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.
Optionally, in the method for determining reservoir permeability, the method further includes:
collecting the unit water inflow amount and the water inflow stabilization time in the unit time of the target drilling in each round of water pumping test;
drawing a relation graph of water inflow parameters and the water level drop depth, and drawing a relation graph of the water inflow parameters and the water inflow stabilization time; wherein the water inflow parameter comprises the unit water inflow and the total water inflow per unit time.
A second aspect of the present application provides a device for determining reservoir permeability, comprising:
the pumping test unit is used for controlling the water pump to perform multiple pumping tests with different pressure differences on the target drilling after the target drilling is qualified in well washing;
the first acquisition unit is used for acquiring target test parameters of the target drilling well in each round of water pumping test process and obtaining attribute parameters of the water sample in the target drilling well by analyzing and testing the water sample in the target drilling well; the target test parameters comprise water level drop depth and total water inflow in unit time;
the coefficient calculation unit is used for calculating the reservoir permeability coefficient of the target well drilling based on the target test parameters of the target well drilling in each round of water pumping test process;
and the permeability calculation unit is used for calculating the reservoir permeability by utilizing the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling.
Optionally, in the above device for determining reservoir permeability, the method further includes:
the control unit is used for controlling the flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to a set rate;
the detection unit is used for detecting the bottom sediment height of the target drilling well and the content of water sample suspended matters after each time the target drilling well is washed;
the test unit is used for carrying out a water pumping test on the target well drilling when no sand setting exists at the bottom of the target well drilling and the content of suspended matters in the water sample is smaller than the preset content, and collecting the water temperature and the water volume in the target well drilling in real time;
the judging unit is used for judging whether the water temperature and the water yield in the target well drilling are stable or not;
and the determining unit is used for determining that the well flushing of the target well drilling is qualified when the water temperature and the water yield in the target well drilling are determined to be stable.
Optionally, in the above-mentioned device for determining reservoir permeability, the coefficient calculating unit includes:
the area calculation unit is used for calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well;
the difference value calculation unit is used for respectively calculating the difference value of the water level drop of the target drilling well and the difference value of the total water inflow in unit time in the adjacent two-round pumping test process to obtain a plurality of groups of parameter difference values;
the coefficient calculation subunit is used for calculating and obtaining a reservoir permeability coefficient corresponding to each group of parameter difference values by using Darcy's law based on the total water outlet area of the reservoir, each group of parameter difference values and the pressure drop distance; wherein the pressure drop distance is a radius of the target wellbore;
and the average value calculation unit is used for determining the average value of the reservoir permeability coefficients corresponding to the parameter difference values of each group as the reservoir permeability coefficient of the target well drilling.
Optionally, in the above device for determining a reservoir permeability, the permeability calculation unit includes:
and the permeability calculation subunit is used for multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well and the gravity acceleration, and dividing the obtained product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.
Optionally, in the above device for determining reservoir permeability, the method further includes:
the second acquisition unit is used for acquiring the unit water inflow and the water inflow stabilization time in the unit time of the target drilling in each round of water pumping test process;
the drawing unit is used for drawing a relation graph of the water inflow parameter and the water level drop depth and drawing a relation graph of the water inflow parameter and the water inflow stabilization time; wherein the water inflow parameter comprises the unit water inflow and the total water inflow per unit time.
A third aspect of the present application provides an electronic device, comprising:
a memory and a processor;
wherein the memory is used for storing programs;
the processor is configured to execute the program, where the program is executed, specifically configured to implement a method for determining a reservoir permeability according to any one of the above.
A fourth aspect of the present application provides a computer storage medium for storing a computer program which, when executed, is adapted to carry out a method of determining reservoir permeability as defined in any one of the preceding claims.
The embodiment of the application provides a reservoir permeability determining method, after a target well is washed, a water pump is controlled to conduct multiple rounds of pumping tests with different pressure differences on the target well, target test parameters of the target well in the process of each round of pumping test are collected, and the attribute parameters of the water sample in the target well are obtained through analysis and test on the water sample in the target well. The target test parameters comprise water level drop depth and total water inflow in unit time. Because the target test parameters can reflect the penetration condition of the water body, the reservoir permeability coefficient of the target well can be calculated based on the target test parameters of the target well in each round of pumping test process. And finally, calculating the reservoir permeability by using the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling, so that analysis is carried out by pumping test and collecting the relevant hydrogeological parameters, and the reservoir permeability is determined. And the pumping test and the collection of related test parameters are more convenient than the collection of rock samples. Moreover, the target test parameters reflect the water penetration condition of a large area, so that the obtained reservoir permeability can more accurately reflect the macroscopic performance of the reservoir in the area to be developed, and the accuracy of the evaluation of the development potential is effectively ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
FIG. 1 is a flow chart of a method for determining reservoir permeability provided in an embodiment of the present application;
FIG. 2 is a flow chart of a well cleanup method according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a graph of water inflow parameter versus water level drop provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a graph of water inflow parameter versus water inflow stabilization time according to an embodiment of the present disclosure;
FIG. 5 is a flow chart of a method of calculating a reservoir permeability coefficient provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of a device for determining permeability of a reservoir according to an embodiment of the present disclosure;
fig. 7 is a schematic architecture diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In this application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the application provides a method for determining the permeability of a reservoir, which is shown in fig. 1 and comprises the following steps:
s101, controlling a water pump to perform multiple rounds of pumping tests with different pressure differences on the target well drilling after the target well drilling is washed well to be qualified.
Where target drilling refers to drilling to analyze reservoir permeability of a region to be surveyed.
It should be noted that in the embodiments of the present application, the reservoir permeability is determined by pumping a well. Specifically, through the mode of a water pumping test, the water flushing condition of a reservoir in the well drilling is analyzed, the permeability of the reservoir is determined, namely, the permeability of the reservoir is analyzed under the condition of water seepage analysis. The water pumping test is carried out, and the corresponding hydrogeology adoption number is obtained, so that compared with the rock sample collection, the water pumping test is more convenient, and a large amount of manpower and physics can be saved. In addition, the water body can be gushed into the well from all directions, so that the reservoir permeability determined by the water pumping mode can better reflect the macroscopic performance of the reservoir in the area to be developed.
Specifically, the water pump can be controlled to perform multiple rounds of pumping tests with different pressure differences on the target well through the set parameters. At least two rounds of pumping tests with different pressure differences are required. Three pumping tests with different pressure differences are usually carried out, so that the reservoir permeability is analyzed based on the transformation condition of the water body during the pumping tests with different pressure differences.
Optionally, during the water pumping test, the high-temperature electric heating submersible pump can be adopted, and the power of the water pump is usually not lower than 50kW, and the lift is not lower than 150m, so that the requirement of the water pumping test can be met. In general, the results obtained are relatively good when the maximum depth of the pumping test is 100 to 200 meters. Of course, depending on the actual situation, a corresponding water pump and pumping depth may be used.
Optionally, in the water pumping test process, the water pumping flow can be controlled through the frequency conversion equipment, the water quantity is observed by the electromagnetic flowmeter, the water temperature and the water temperature of the wellhead are observed by the mercury thermometer, and the water level burial depth is measured by adopting the measuring rope and the ammeter.
Since sand and stone in water in the well can affect analysis results, it is necessary to wash the well after the well is completely drilled, and to start a pumping test after the well is washed out.
Optionally, another embodiment of the present application provides a well cleanup method, as shown in fig. 2, including the steps of:
s201, controlling the flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to the set speed.
Specifically, during well flushing, a worker can firstly draw down the pipe for flushing, and after the pipe is completely drawn down, the drill rod and the punching device are put down, so that the flushing device is formed. And then setting the flushing rate, so that the flushing device is controlled by program automatic control to perform rotary jet flushing on the target drilling well section by section from top to bottom according to the set rate. Wherein the flush rate is typically set to: 5-10min/m.
Alternatively, the pump may be used for pumping and the accumulated well-flushing time is typically 24 hours, effectively ensuring flushing and each.
S202, after each flushing of the target well, detecting the bottom sediment height of the target well and the content of water sample suspended matters.
And S203, when no sand setting is detected at the bottom of the target well, and the content of suspended matters in the water sample is smaller than the preset content, performing a water pumping test on the target well, and collecting the water temperature and the water volume in the target well in real time.
It should be noted that when the bottom of the target well is free of sand, i.e. the well is flushed to the water clean, the bottom sand is zero in height, and the content of suspended matters in the water sample is less than the preset content, for example, less than 0.1%, the well is flushed to the required level. However, in order to further ensure that the water quality at this time does not affect the analysis result, in this embodiment of the present application, a water pumping test is further performed first, and the water temperature and the water volume in the target well are collected in real time.
Specifically, for the test pumping test, the test pumping test can be realized by controlling pumping equipment.
S204, judging whether the water temperature and the water yield in the target well drilling are stable or not.
If it is determined that the water temperature and the water yield in the target well drilling are stable, the well flushing effect is qualified, and the formal water pumping requirement is satisfied, so that step S205 is executed at this time.
If the water temperature or the water quantity in the target well drilling is unstable in depth, the result of trial pumping is unqualified, at the moment, the reason needs to be ascertained, and after the problems are solved, the water pumping test is repeated, and the water pumping effect is qualified, further formal water pumping operation is carried out.
S205, determining that the well flushing of the target well drilling is qualified.
S102, collecting target test parameters of the target drilling well in each round of pumping test process, and obtaining attribute parameters of the water sample in the target drilling well by analyzing and testing the water sample in the target drilling well.
The target test parameters comprise water level drop depth and total water inflow in unit time.
Alternatively, other fixed parameters required in the subsequent calculation process, such as drill string, reservoir thickness, etc., may be obtained at this time.
Specifically, because the required attribute parameters of the water sample are some conventional attribute parameters of the water sample, such as viscosity and density, corresponding detection equipment is preset so as to directly detect the water sample collected from the target well by controlling the detection equipment, thereby obtaining the attribute parameters of the water sample in the target well.
Optionally, in order to intuitively translate out the hydrogeologic condition of the target well, in another embodiment of the present application, the method further comprises:
and collecting the unit water inflow and the water inflow stabilization time in the unit time of the target drilling in each round of pumping test process, and drawing a relation graph of water inflow parameters and water level drop depth and a relation graph of water inflow parameters and water inflow stabilization time.
Wherein the water inflow parameter comprises a unit water inflow and a total water inflow per unit time. The total water inflow in unit time is the total water inflow in unit time, and the unit water inflow in unit time is the water inflow of the unit reservoir in unit time.
Specifically, for the graph plotting the water inflow parameter versus the water level drop, i.e., the total water inflow per unit water inflow and per unit time is taken as the ordinate, while the abscissa is the water level drop, for example, as shown in fig. 3, the ordinate on the left is the total water inflow Q per unit time, the ordinate on the right is the total water inflow Q per unit time, and the abscissa is the water level drop S.
Similarly, the graph of the relation between the water inflow parameter and the water inflow stabilization time takes the total water inflow per unit water inflow and per unit time as ordinate, and the water inflow stabilization time as abscissa, for example, as shown in fig. 4, the ordinate on the left is the total water inflow Q per unit time, the ordinate on the right is the unit water inflow Q, and the abscissa is the water inflow stabilization time t.
The water inflow stabilization time is the time for which the water inflow is stabilized, and is generally set to 48 hours, 24 hours, and 12 hours.
S103, calculating to obtain the reservoir permeability coefficient of the target well based on the target test parameters of the target well in the pumping test process of each round.
It should be noted that the target test parameters include the water level drop depth and the total water inflow amount in unit time in the pumping test process, so that the target test parameters can reflect the permeability of the reservoir to the water body, and therefore the reservoir permeability coefficient of the target well drilling can be obtained based on the target test parameters.
Specifically, the reservoir permeability coefficient of the target wellbore may be calculated based on darcy's law.
Alternatively, in another embodiment of the present application, a specific implementation of step S103, as shown in fig. 5, includes the following steps:
s501, calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well.
Because the total water inflow in unit time is obtained and is not the water inflow in unit area in unit time, the total water outflow area of the reservoir needs to be calculated based on the diameter of the target well and the reservoir bottom of the target well.
Specifically, the diameter of the target well is multiplied by the reservoir bottom of the target well and then multiplied by the circumference ratio to obtain the total water outlet area of the reservoir.
S502, respectively calculating the difference value of the water level drop of the target well drilling and the difference value of the total water inflow in unit time in the adjacent two-round water pumping test process to obtain a plurality of groups of parameter difference values.
Specifically, darcy's law is:namely: />Thus:
wherein K is the reservoir permeability coefficient; h is a 1 And h 2 The liquid level of the two water pumps is respectively, so delta h is the liquid level difference of the two water pumps; Δq is the difference in total water inflow per unit of two draws; a is the total water outlet area of the reservoir; l is the pressure drop distance.
It is therefore required to obtain the reservoir permeability coefficient, and it is necessary to calculate the difference in level of two water draws and the difference in unit total water inflow of the two water draws.
S503, calculating to obtain reservoir permeability coefficients corresponding to each group of parameter differences by using Darcy' S law based on the total water outlet area of the reservoir, each group of parameter differences and the pressure drop distance.
Wherein the pressure drop distance is the radius of the target well.
Specifically, the total water outlet area of the reservoir, a set of parameter difference values and the pressure drop distance are substituted into the calculation formula of the reservoir permeability coefficient, so that the reservoir permeability coefficient corresponding to the set of parameter difference values can be obtained.
S504, determining the average value of the reservoir permeability coefficients corresponding to the parameter difference values of each group as the reservoir permeability coefficient of the target well drilling.
In order to improve the accuracy of the reservoir permeability coefficient of the target wellbore, in the embodiment of the application, a plurality of reservoir permeability coefficients are calculated, and the average value of the reservoir permeability coefficients is used as the reservoir permeability coefficient of the target wellbore.
S104, calculating to obtain the reservoir permeability by using the reservoir permeability coefficient of the target well and the attribute parameters of the water sample in the target well.
Because the permeability of liquids with different properties is different, the reservoir permeability coefficient of the target well drilling is obtained, and the property parameters of the water sample in the target well drilling are further considered, so that the energy storage permeability is finally calculated.
Specifically, in another embodiment of the present application, a specific implementation manner of step S104 includes:
and multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well and the gravity acceleration, and dividing the obtained product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.
The embodiment of the application provides a reservoir permeability determining method, after a target well is washed, a water pump is controlled to conduct multiple rounds of pumping tests with different pressure differences on the target well, target test parameters of the target well in the process of each round of pumping test are collected, and the attribute parameters of the water sample in the target well are obtained through analysis and test on the water sample in the target well. The target test parameters comprise water level drop depth and total water inflow in unit time. Because the target test parameters can reflect the penetration condition of the water body, the reservoir permeability coefficient of the target well can be calculated based on the target test parameters of the target well in each round of pumping test process. And finally, calculating the reservoir permeability by using the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling, so that analysis is carried out by pumping test and collecting the relevant hydrogeological parameters, and the reservoir permeability is determined. And the pumping test and the collection of related test parameters are more convenient than the collection of rock samples. Moreover, the target test parameters reflect the water penetration condition of a large area, so that the obtained reservoir permeability can more accurately reflect the macroscopic performance of the reservoir in the area to be developed, and the accuracy of the evaluation of the development potential is effectively ensured.
Another embodiment of the present application provides a device for determining permeability of a reservoir, as shown in fig. 6, including:
and the pumping test unit 601 is used for controlling the water pump to perform pumping tests with different pressure differences on the target well after the target well is washed well.
The first collection unit 602 is configured to collect target test parameters of a target well in each round of pumping test process, and obtain attribute parameters of a water sample in the target well by performing an analysis test on the water sample in the target well.
The target test parameters comprise water level drop depth and total water inflow in unit time.
And the coefficient calculating unit 603 is used for calculating and obtaining the reservoir permeability coefficient of the target well drilling based on the target test parameters of the target well drilling in the process of each round of pumping test.
And the permeability calculation unit 604 is used for calculating the reservoir permeability by using the reservoir permeability coefficient of the target well and the attribute parameters of the water sample in the target well.
Optionally, in the device for determining the reservoir permeability provided in another embodiment of the present application, the method further includes:
and the control unit is used for controlling the flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to the set speed.
And the detection unit is used for detecting the bottom sediment height of the target well and the content of water sample suspended matters after each flushing of the target well.
And the test unit is used for carrying out a water test pumping test on the target well drilling when no sand setting exists at the bottom of the target well drilling and the content of suspended matters in the water sample is smaller than the preset content, and collecting the water temperature and the water volume in the target well drilling in real time.
And the judging unit is used for judging whether the water temperature and the water yield in the target well drilling are stable or not.
And the determining unit is used for determining that the well flushing of the target well drilling is qualified when the water temperature and the water yield in the target well drilling are determined to be stable.
Optionally, in the device for determining reservoir permeability provided in another embodiment of the present application, the coefficient calculating unit includes:
and the area calculation unit is used for calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well.
And the difference value calculation unit is used for respectively calculating the difference value of the water level drop of the target well drilling and the difference value of the total water inflow in unit time in the adjacent two-round water pumping test process to obtain a plurality of groups of parameter difference values.
And the coefficient calculation subunit is used for calculating the reservoir permeability coefficient corresponding to each group of parameter difference values by using Darcy's law based on the total water outlet area of the reservoir, each group of parameter difference values and the pressure drop distance. Wherein the pressure drop distance is the radius of the target well.
And the average value calculation unit is used for determining the average value of the reservoir permeability coefficients corresponding to the parameter difference values of each group as the reservoir permeability coefficient of the target well drilling.
Optionally, in the device for determining a reservoir permeability provided in another embodiment of the present application, the permeability calculation unit includes:
and the permeability calculation subunit is used for multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well and the gravity acceleration, and dividing the obtained product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.
Optionally, in the device for determining the reservoir permeability provided in another embodiment of the present application, the method further includes:
the second acquisition unit is used for acquiring the unit water inflow and the water inflow stabilization time in the unit time of the target drilling in each round of pumping test process.
And the drawing unit is used for drawing a relation curve graph of the water inflow parameter and the water level drop depth and drawing a relation curve graph of the water inflow parameter and the water inflow stable time.
Wherein the water inflow parameter comprises a unit water inflow and a total water inflow per unit time.
It should be noted that, for the specific working process of each unit provided in the above embodiment of the present application, reference may be made to corresponding steps in the above method embodiment accordingly, which is not described herein again.
Another embodiment of the present application provides an electronic device, as shown in fig. 7, including:
a memory 701 and a processor 702.
Wherein the memory 701 is used for storing a program.
The processor 702 is configured to execute a program stored in the memory 701, where the program is executed, and specifically configured to implement a method for determining a reservoir permeability according to any one of the embodiments described above.
Another embodiment of the present application provides a computer storage medium storing a computer program which, when executed, is configured to implement a method for determining a reservoir permeability as provided in any one of the embodiments above.
Computer storage media, including both non-transitory and non-transitory, removable and non-removable media, may be implemented in any method or technology for storage of information. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, read only compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by the computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
Those of skill would further appreciate that the various illustrative units and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of determining reservoir permeability, comprising:
after the target well drilling is qualified in well washing, controlling a water pump to perform multiple rounds of pumping tests with different pressure differences on the target well drilling;
collecting target test parameters of the target drilling in each round of pumping test process, and obtaining attribute parameters of the water sample in the target drilling by analyzing and testing the water sample in the target drilling; the target test parameters comprise water level drop depth and total water inflow in unit time;
calculating to obtain a reservoir permeability coefficient of the target well based on target test parameters of the target well in each round of pumping test process;
and calculating the reservoir permeability by using the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling.
2. The method of claim 1, wherein after the target well is qualified for flushing, the controlling the water pump to perform a plurality of pumping tests with different differential pressures on the target well further comprises:
controlling a flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to a set rate;
after each flushing of the target well, detecting the bottom sand setting height and the water sample suspended matter content of the target well;
when no sand setting at the bottom of the target well is detected, and the content of suspended matters in a water sample is smaller than the preset content, performing a water pumping test on the target well, and collecting the water temperature and the water volume in the target well in real time;
judging whether the water temperature and the water yield in the target well drilling are stable or not;
and if the water temperature and the water yield in the target well drilling are judged to be stable, determining that well flushing of the target well drilling is qualified.
3. The method of claim 1, wherein the calculating reservoir permeability coefficients for the target well based on target test parameters for the target well during each round of the water pumping test comprises:
calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well;
respectively calculating the difference value of the water level drop of the target well drilling and the difference value of the total water inflow in unit time in the adjacent two-round pumping test process to obtain a plurality of groups of parameter difference values;
based on the total water outlet area of the reservoir, each group of parameter difference values and the pressure drop distance, calculating to obtain reservoir permeability coefficients corresponding to each group of parameter difference values by using Darcy's law; wherein the pressure drop distance is a radius of the target wellbore;
and determining the average value of the reservoir permeability coefficients corresponding to the parameter differences of each group as the reservoir permeability coefficient of the target well.
4. The method of claim 1, wherein the calculating reservoir permeability using the reservoir permeability coefficient of the target well and the property parameters of the water sample in the target well comprises:
and multiplying the reservoir permeability coefficient of the target well, the fluid code of the water sample in the target well and the gravity acceleration, and dividing the obtained product by the fluid viscosity of the water sample in the target well to obtain the reservoir permeability.
5. The method as recited in claim 1, further comprising:
collecting the unit water inflow amount and the water inflow stabilization time in the unit time of the target drilling in each round of water pumping test;
drawing a relation graph of water inflow parameters and the water level drop depth, and drawing a relation graph of the water inflow parameters and the water inflow stabilization time; wherein the water inflow parameter comprises the unit water inflow and the total water inflow per unit time.
6. A device for determining reservoir permeability, comprising:
the pumping test unit is used for controlling the water pump to perform multiple pumping tests with different pressure differences on the target drilling after the target drilling is qualified in well washing;
the first acquisition unit is used for acquiring target test parameters of the target drilling well in each round of water pumping test process and obtaining attribute parameters of the water sample in the target drilling well by analyzing and testing the water sample in the target drilling well; the target test parameters comprise water level drop depth and total water inflow in unit time;
the coefficient calculation unit is used for calculating the reservoir permeability coefficient of the target well drilling based on the target test parameters of the target well drilling in each round of water pumping test process;
and the permeability calculation unit is used for calculating the reservoir permeability by utilizing the reservoir permeability coefficient of the target well drilling and the attribute parameters of the water sample in the target well drilling.
7. The apparatus as recited in claim 6, further comprising:
the control unit is used for controlling the flushing device to perform rotary jet flushing on the target drilling well section by section from top to bottom according to a set rate;
the detection unit is used for detecting the bottom sediment height of the target drilling well and the content of water sample suspended matters after each time the target drilling well is washed;
the test unit is used for carrying out a water pumping test on the target well drilling when no sand setting exists at the bottom of the target well drilling and the content of suspended matters in the water sample is smaller than the preset content, and collecting the water temperature and the water volume in the target well drilling in real time;
the judging unit is used for judging whether the water temperature and the water yield in the target well drilling are stable or not;
and the determining unit is used for determining that the well flushing of the target well drilling is qualified when the water temperature and the water yield in the target well drilling are determined to be stable.
8. The apparatus according to claim 6, wherein the coefficient calculation unit includes:
the area calculation unit is used for calculating the total water outlet area of the reservoir based on the diameter of the target well and the reservoir bottom of the target well;
the difference value calculation unit is used for respectively calculating the difference value of the water level drop of the target drilling well and the difference value of the total water inflow in unit time in the adjacent two-round pumping test process to obtain a plurality of groups of parameter difference values;
the coefficient calculation subunit is used for calculating and obtaining a reservoir permeability coefficient corresponding to each group of parameter difference values by using Darcy's law based on the total water outlet area of the reservoir, each group of parameter difference values and the pressure drop distance; wherein the pressure drop distance is a radius of the target wellbore;
and the average value calculation unit is used for determining the average value of the reservoir permeability coefficients corresponding to the parameter difference values of each group as the reservoir permeability coefficient of the target well drilling.
9. An electronic device, comprising:
a memory and a processor;
wherein the memory is used for storing programs;
the processor is configured to execute the program, which program, when executed, is in particular configured to implement the method of determining reservoir permeability according to any one of claims 1 to 5.
10. A computer storage medium storing a computer program which, when executed, is adapted to carry out the method of determining reservoir permeability according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726108.8A CN116537774A (en) | 2023-06-19 | 2023-06-19 | Method and device for determining reservoir permeability, electronic equipment and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726108.8A CN116537774A (en) | 2023-06-19 | 2023-06-19 | Method and device for determining reservoir permeability, electronic equipment and storage medium |
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| CN116537774A true CN116537774A (en) | 2023-08-04 |
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| CN202310726108.8A Pending CN116537774A (en) | 2023-06-19 | 2023-06-19 | Method and device for determining reservoir permeability, electronic equipment and storage medium |
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