CN111852462A - Method and device for acquiring dynamic reserves of oil well - Google Patents
Method and device for acquiring dynamic reserves of oil well Download PDFInfo
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- CN111852462A CN111852462A CN201910357313.5A CN201910357313A CN111852462A CN 111852462 A CN111852462 A CN 111852462A CN 201910357313 A CN201910357313 A CN 201910357313A CN 111852462 A CN111852462 A CN 111852462A
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- 239000003129 oil well Substances 0.000 title claims abstract description 173
- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 231
- 239000003921 oil Substances 0.000 claims abstract description 151
- 238000004519 manufacturing process Methods 0.000 claims abstract description 116
- 238000002347 injection Methods 0.000 claims abstract description 105
- 239000007924 injection Substances 0.000 claims abstract description 105
- 238000006073 displacement reaction Methods 0.000 claims abstract description 65
- 239000010779 crude oil Substances 0.000 claims abstract description 49
- 238000011161 development Methods 0.000 claims description 24
- 238000011084 recovery Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 15
- 238000006467 substitution reaction Methods 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 6
- 230000018109 developmental process Effects 0.000 description 20
- 230000001186 cumulative effect Effects 0.000 description 14
- 239000000243 solution Substances 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011022 operating instruction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002349 well water 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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Abstract
The embodiment of the invention provides a method and a device for acquiring dynamic reserves of an oil well. The method of the invention comprises the following steps: acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount corresponding to the current accumulated water injection amount of the oil well; obtaining the current accumulated water displacement rate according to the current accumulated water injection amount and the current accumulated oil production amount; and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well. The dynamic reserve volume of the oil well can be calculated according to the current accumulated water displacement rate. The problem that parameters are difficult to obtain when the dynamic reserves of the oil well are calculated by using the prior art is solved. And the calculated dynamic reserves of the oil wells are closer to the actual dynamic reserves of the oil wells, so that important data are provided for crude oil exploitation, and a better decision can be made for crude oil exploitation.
Description
Technical Field
The embodiment of the invention relates to an oil field exploitation technology, in particular to a method and a device for acquiring dynamic reserves of an oil well.
Background
The fracture-cavity type carbonate reservoir is a large heterogeneous carbonate karst fracture-cavity type reservoir. Because the reservoir body of the fracture-cave carbonate reservoir is not basically communicated with the outside, the reservoir body cannot be effectively supplemented with energy along with the exploitation of crude oil, and the yield and the pressure decrease rapidly. Wherein the reservoir is a region where crude oil is present. Aiming at the special storage and flow characteristics of isolated karst caves existing in a fracture-cavity type oil reservoir, a single-well water injection oil replacement technology is adopted for fracture-cavity unit volume fixing bodies, so that the single-well yield is gradually improved. During the production of oil, it is necessary to know the well dynamic reserves to adjust the production scheme. Wherein the well dynamic reserve is the amount of crude oil that can be produced in the reservoir.
In the prior art, when the dynamic reserves of an oil well are calculated by adopting a volumetric method and a carving method, a large number of parameters are needed, and for a fracture-cavity carbonate reservoir, some parameters are difficult to measure or measurement and calculation are inaccurate, such as porosity and oil content. Therefore, when the oil well dynamic reserves are calculated by adopting a volumetric method and a carving method, the difference between the calculated oil well dynamic reserves and the actual oil well dynamic reserves is large.
Disclosure of Invention
The embodiment of the invention provides a method and a device for acquiring dynamic reserves of an oil well, which aim to solve the problem that when the dynamic reserves of the oil well are calculated in the prior art, the calculated dynamic reserves of the oil well are greatly different from the actual dynamic reserves of the oil well.
In a first aspect, an embodiment of the present invention provides a method for acquiring a dynamic reserve of an oil well, including:
acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount;
acquiring a current accumulated water displacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water displacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity;
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and a first oil production amount of the oil well, wherein the first oil production amount is the oil production amount obtained in the self-blowout development stage, and the self-blowout development stage is the stage of producing crude oil under the action of natural energy by the oil well.
In some embodiments, said obtaining a dynamic reserve of said well based on said current accumulated water displacement rate and said first oil production of said well comprises:
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery ratio of the crude oil in the oil well.
In some embodiments, said deriving a well dynamic reserve based on said current accumulated water displacement rate, said first oil production of said well, and a predetermined recovery rate of crude oil in said well comprises:
obtaining the dynamic reserves of the oil well according to the following formula I;
wherein Z represents the dynamic reserve of the oil well when the current accumulated water substitution rate is D, K represents the preset recovery rate of the crude oil, and N0Represents a first oil production, wherein a is equal to or greater than 0 and B is equal to or greater than 0.
In some embodiments, the first formula is determined by:
according to the formula two: lgNp ═ lgA + BlgWp and formula three: lgWp ═ lgNp-lgD yields equation four:
wherein, Wp is the current accumulated water injection amount, and Np is the current accumulated oil production amount corresponding to Wp;
according to the formula four:
and formula five: Z-K (N)0+ Np) to obtain said formula one:
in some embodiments, further comprising:
And obtaining the A and the B in the formula III according to a plurality of accumulated water injection quantities of each sample oil well in the N sample oil wells and the accumulated oil production corresponding to each accumulated water injection quantity.
In some embodiments, before obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production of the oil well, the method further comprises:
judging whether the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate or not;
obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well, and the method comprises the following steps:
and if the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate, obtaining the dynamic reserve volume of the oil well according to the current accumulated water replacement rate and the first oil production volume of the oil well.
In a second aspect, an embodiment of the present invention provides an oil well dynamic reserve acquiring apparatus, including:
the acquisition module is used for acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount;
the processing module is used for acquiring a current accumulated water replacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water replacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity; and the oil well is also used for obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well, wherein the first oil production amount is the oil production amount obtained in the flowing development stage, and the flowing development stage is the stage of producing crude oil under the action of natural energy by the oil well.
In some embodiments, the processing module is specifically configured to:
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery ratio of the crude oil in the oil well.
In some embodiments, the processing module, when obtaining the well dynamic reserve based on the current accumulated water displacement rate, the first oil production of the well, and the predetermined recovery factor of the crude oil in the well, is specifically configured to:
obtaining the dynamic reserves of the oil well according to the following formula I;
wherein Z represents the dynamic reserve of the oil well when the current accumulated water substitution rate is D, K represents the preset recovery rate of the crude oil, and N0Represents a first oil production, wherein a is equal to or greater than 0 and B is equal to or greater than 0.
In some embodiments, the first formula is determined by:
according to the formula two: lgNp ═ lgA + BlgWp and formula three: lgWp ═ lgNp-lgD, yielding equation four:
wherein, Wp is the current accumulated water injection amount, and Np is the current accumulated oil production amount corresponding to Wp;
according to the formula four:
and formula five: Z-K (N)0+ Np) to obtain said formula one:
in some embodiments, the obtaining module is further configured to:
and obtaining the A and the B in the formula III according to a plurality of accumulated water injection quantities of each sample oil well in the N sample oil wells and the accumulated oil production corresponding to each accumulated water injection quantity.
In some embodiments, the apparatus further comprises: a judgment module;
the judging module is used for judging whether the current accumulated water displacement rate is smaller than a preset accumulated water displacement rate or not before the processing module obtains the dynamic reserve volume of the oil well according to the current accumulated water displacement rate and the first oil yield of the oil well;
and the processing module is specifically used for obtaining the dynamic reserve volume of the oil well according to the current accumulated water replacement rate and the first oil production volume of the oil well when the judging module judges that the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate.
In a third aspect, an embodiment of the present invention provides an electronic device, including: at least one processor and memory;
the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored by the memory to perform the inventive embodiment method of any of the first aspect of the inventive embodiments.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which program instructions are stored, and when the program instructions are executed by a processor, the method of any one of the first aspect of the embodiment of the present invention is implemented.
In a fifth aspect, this application embodiment provides a program product, where the program product includes a computer program, where the computer program is stored in a readable storage medium, and the computer program can be read by at least one processor of an electronic device from the readable storage medium, and the computer program is executed by the at least one processor to enable the electronic device to implement the invention embodiment method provided in any one of the first aspect of the invention embodiments of this application.
The embodiment of the invention provides a method and a device for acquiring dynamic reserve of an oil well, which are characterized in that the current accumulated water injection amount of the oil well and the current accumulated oil production amount corresponding to the current accumulated water injection amount of the oil well are acquired; acquiring a current accumulated water displacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water displacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity; and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and a first oil yield of the oil well, wherein the self-blowing development stage is a stage of producing crude oil under the action of natural energy by the oil well, and the first oil yield is an oil yield obtained in the self-blowing development stage. The dynamic reserve volume of the oil well can be calculated according to the current accumulated water displacement rate. Because when calculating the oil well developments reserves according to current accumulative water displacement rate, only need obtain current accumulative water delivery, current accumulative oil production and the first oil production that current accumulative water injection corresponds, when solving to use prior art to calculate oil well developments reserves, the problem that the parameter is difficult to obtain. In addition, the method for acquiring the dynamic reserves of the oil well disclosed by the embodiment of the invention enables the dynamic reserves of the oil well obtained by calculation to be closer to the actual dynamic reserves of the oil well, thereby providing important data for crude oil exploitation and making a better decision for crude oil exploitation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for obtaining dynamic reserves of an oil well according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for obtaining dynamic reserves of a well according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a dynamic reserve acquisition device for an oil well according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and claims of this application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Fig. 1 is a flowchart of a method for acquiring a dynamic reserve of an oil well according to an embodiment of the present invention, and as shown in fig. 1, the method of this embodiment may include:
s101, acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount.
In this embodiment, after the oil field is put into development, along with the increase of the exploitation time, the energy of the oil layer itself will be continuously consumed, so that the pressure of the oil layer is continuously reduced, and the oil yield is greatly reduced. Therefore, in order to compensate for the underground deficit caused by the production of crude oil, maintain or increase the reservoir pressure, increase and stabilize the yield of the oil field and obtain higher recovery efficiency, water injection must be performed on the oil field. The reservoir may be, for example, a reservoir located in a fracture-cavity carbonate rock.
In the water injection production stage of oil extraction, water is injected into the oil field through the oil well to raise the pressure of an oil layer below the oil well, so that crude oil in the oil layer is produced through the oil well under the action of the pressure. Wherein the amount of water injected into the reservoir at each time is known and the amount of oil produced after each injection is also known. Therefore, after each water injection oil extraction through the oil well, the current accumulated water injection amount injected through the oil well is counted, and the current accumulated oil production amount corresponding to the current accumulated water injection amount extracted through the oil well is counted. For example, the first water injection amount is W 1The oil production is N1If the current accumulated water injection quantity Wp is W1The current accumulated oil production Np corresponding to the current accumulated water injection Wp is N1(ii) a The second water injection amount is W2The oil production is N2If the current accumulated water injection quantity Wp is W1+W2The current cumulative oil production Np corresponding to the current cumulative water injection Wp is N1+ N2, and so on, and the ith water injection amount is WiThe oil production is NiIf the current accumulated water injection quantity Wp is W1+W2+…+WiThe current accumulated oil production Np corresponding to the current accumulated water injection Wp is N1+N2+…+NiWherein i represents the number of co-injection water when the current accumulated water injection amount is counted, and i is an integer greater than or equal to 1.
And S102, acquiring the current accumulated water displacement rate according to the current accumulated water injection amount and the current accumulated oil production amount.
And the accumulated water displacement rate is the ratio of the current accumulated oil production amount to the current accumulated water injection amount.
In this embodiment, after the current accumulated water injection amount Wp and the current accumulated oil production Np corresponding to the current accumulated water injection amount Wp are obtained, the ratio of the current accumulated water injection amount Wp to the current accumulated oil production Np corresponding to the current accumulated water injection amount Wp is calculated, and the current accumulated water replacement rate is obtained. Wherein, the current accumulated water replacement rate is represented by D, 
S103, obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well.
The first oil production is obtained in a self-blowout development stage, and the self-blowout development stage is a stage of producing crude oil under the action of natural energy by the oil well.
In this embodiment, after the oil well enters the development stage, the crude oil in the oil layer can be automatically ejected from the oil well under the action of natural energy due to the energy of the oil layer, which is the self-ejection development stage. Wherein, the oil production obtained in the whole self-spraying development stage is recorded as the first oil production.
After the current accumulated water displacement rate D is obtained, according to the first oil production amount and the current accumulated water displacement rate DiAnd obtaining the oil well dynamic reserve corresponding to the current accumulated water displacement rate D, wherein the oil well dynamic reserve is recorded as Z.
In some embodiments, one possible implementation of S103 is:
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery ratio of the crude oil in the oil well.
In this embodiment, in the actual crude oil production, the crude oil corresponding to the dynamic reserve of the oil well cannot be completely produced, and therefore, after the current accumulated water displacement rate and the first oil yield of the oil well are obtained, the preset recovery ratio of the oil well needs to be known. The preset recovery factor is obtained by fitting big data, and the value range of the preset recovery factor can be 20% -30%, for example.
And after the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery rate of the crude oil in the oil well are obtained, obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery rate of the crude oil in the oil well.
Wherein, in some embodiments, the formula for deriving the dynamic reserve of the well based on the current accumulated water displacement rate, the first oil production of the well, and the predetermined recovery rate of the crude oil in the well may be, for example, as shown in formula one:
wherein Z represents the dynamic reserve of the oil well when the current accumulated water substitution rate is D, K represents the preset recovery rate of the crude oil, and N0Represents a first oil production, wherein a is equal to or greater than 0 and B is equal to or greater than 0.
In some embodiments, the derivation of equation one is:
and fitting according to the big data to obtain the relationship between the current accumulated water injection amount and the current accumulated oil production amount corresponding to the current accumulated water injection amount, wherein the relationship is shown in a formula II:
lgNp ═ lgA + BlgWp formula two
In some embodiments, the a and the B in the second formula are obtained according to a plurality of cumulative water injection amounts of each of the N sample wells and a cumulative oil production amount corresponding to each cumulative water injection amount. For example, a plurality of cumulative water injection amounts for each of N sample wells and a cumulative oil yield corresponding to each cumulative water injection amount are marked on a rectangular coordinate system, so that a relationship between the cumulative water injection amount and the cumulative oil yield corresponding to each cumulative water injection amount is fitted, and the parameter a and the parameter B are determined.
Then, according to the relationship between the current accumulated water injection amount and the current accumulated oil production amount corresponding to the current accumulated water injection amount and the current water substitution rate, obtaining the relationship between the current accumulated water injection amount, the current accumulated oil production amount corresponding to the current accumulated water injection amount and the current accumulated water substitution rate, namely a formula III:
lgWp ═ lgNp-lgD formula three
Note that when the next cumulative water substitution rate is not calculated, that is, when the cumulative water substitution rate is included in the formula, Np in the formula represents all the oil production amounts that can be obtained by the water injection method at the current cumulative water substitution rate.
And obtaining the relation between all the oil production Np which can be obtained by the water injection method and the current accumulated water substitution rate according to the second formula and the third formula. Wherein the formula for obtaining all the oil production Np obtainable by the water injection method is for example as shown in formula four:
wherein, Wp is the current accumulated water injection amount, and Np is the current accumulated oil production amount corresponding to Wp.
Finally, according to the relation between all the oil production Np obtained by the water injection method and the current accumulated water substitution rate, namely a formula IV:
and formula five: Z-K (N)0+ Np), obtaining equation one:
in the embodiment, the current accumulated water injection amount of the oil well and the current accumulated oil production amount corresponding to the current accumulated water injection amount of the oil well are obtained; acquiring a current accumulated water displacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water displacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity; and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and a first oil yield of the oil well, wherein the self-blowing development stage is a stage of producing crude oil under the action of natural energy by the oil well, and the first oil yield is an oil yield obtained in the self-blowing development stage. The method for calculating the dynamic reserves of the oil wells according to the current accumulated water displacement rate is realized. Because when calculating the oil well developments reserves according to current accumulative water displacement rate, only need obtain current accumulative water delivery, current accumulative oil production and the first oil production that current accumulative water injection corresponds, when solving to use prior art to calculate oil well developments reserves, the problem that the parameter is difficult to obtain. In addition, the method for acquiring the dynamic reserves of the oil well disclosed by the embodiment of the invention enables the dynamic reserves of the oil well obtained by calculation to be closer to the actual dynamic reserves of the oil well, thereby providing important data for crude oil exploitation and making a better decision for crude oil exploitation.
Fig. 2 is a flow chart of a method for acquiring dynamic reserves of an oil well according to another embodiment of the present invention. As shown in fig. 2, on the basis of the embodiment shown in fig. 1, the method of this embodiment may include:
s201, acquiring the current accumulated water injection amount of the oil well and the current accumulated oil production amount corresponding to the current accumulated water injection amount of the oil well.
S202, obtaining the current accumulated water displacement rate according to the current accumulated water injection amount and the current accumulated oil production amount.
In this embodiment, specific implementations of S201 and S202 may refer to S101 and S102, respectively, and are not described herein again.
S203, judging whether the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate. If so, S204 is executed, otherwise, the water injection into the oil reservoir is terminated or continued and the above-described S201 is executed.
In this example, since the cost is required for injecting water into the oil reservoir, when the ratio between the value of the produced crude oil and the cost spent by the water injection does not satisfy the preset ratio, it is demonstrated that the production of crude oil by the water injection no longer satisfies the enterprise benefit. The ratio between the value of the mined crude oil and the cost spent on water injection can be represented by the accumulated water replacement rate, the preset accumulated water replacement rate corresponding to the preset ratio is set according to the preset ratio between the value of the mined crude oil and the cost spent on water injection, and whether water injection in an oil layer needs to be continued or not is determined by judging the size relationship between the current accumulated water replacement rate and the preset accumulated water replacement rate obtained through calculation.
And S204, obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well.
In this embodiment, when the current accumulated water displacement rate obtained by calculation is greater than or equal to the preset accumulated water displacement rate, it is described that at this time, crude oil may also be produced by injecting water into the oil reservoir. And when the current accumulated water replacement rate is smaller than the preset accumulated water replacement rate, indicating that the crude oil exploitation by water injection does not conform to the enterprise interests any more, and at the moment, obtaining the dynamic reserve volume of the oil well according to the current accumulated water replacement rate and the first oil production volume of the oil well.
It should be noted that, when the current accumulated water replacement rate is obtained, the cost corresponding to the accumulated water injection amount and the value corresponding to the accumulated oil production amount under the current accumulated water replacement rate can be calculated, when the ratio of the value corresponding to the accumulated oil production amount to the cost corresponding to the accumulated oil injection amount is smaller than the preset ratio, it can be also indicated that the crude oil production through water injection does not accord with the enterprise benefit, and at this time, the dynamic reserve volume of the oil well is obtained according to the current accumulated water replacement rate and the first oil production amount of the oil well.
In the embodiment, the current accumulated water injection amount of the oil well and the current accumulated oil production amount corresponding to the current accumulated water injection amount of the oil well are obtained; obtaining the current accumulated water displacement rate according to the current accumulated water injection amount and the current accumulated oil production amount; judging whether the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate or not; and the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate, and the dynamic reserve volume of the oil well is obtained according to the current accumulated water replacement rate and the first oil production volume of the oil well. The dynamic reserve volume of the oil well can be calculated according to the current accumulated water displacement rate. And after the current accumulated water replacement rate is obtained, whether crude oil can be extracted by a water injection method or not can be determined according to the size relation between the current accumulated water replacement rate and the preset accumulated water replacement rate, and the dynamic reserves of the oil well are calculated when the current accumulated water replacement rate is smaller than the preset accumulated water replacement rate, so that the dynamic reserves of the oil well obtained by calculation are closer to the actual dynamic reserves of the oil well, important data are provided for crude oil extraction, and a better decision can be made for crude oil extraction.
Fig. 3 is a schematic structural diagram of an oil well dynamic reserve acquisition apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus according to this embodiment may include: an acquisition module 31 and a processing module 32. In some embodiments, the apparatus may further comprise: a decision block 33. Wherein,
the acquiring module 31 is configured to acquire a current accumulated water injection amount of an oil well and a current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount;
the processing module 32 is configured to obtain a current accumulated water replacement rate according to the current accumulated water injection amount and the current accumulated oil production amount, where the accumulated water replacement rate is a ratio of the current accumulated oil production amount to the current accumulated water injection amount; and the oil well is also used for obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well, wherein the first oil production amount is the oil production amount obtained in the flowing development stage, and the flowing development stage is the stage of producing crude oil under the action of natural energy by the oil well.
In some embodiments, the processing module 32 is specifically configured to:
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery ratio of the crude oil in the oil well.
In some embodiments, the processing module 32, when deriving a well dynamic reserve based on the current accumulated water displacement rate, the first oil production of the well, and the predetermined recovery factor of the crude oil in the well, is specifically configured to:
obtaining the dynamic reserves of the oil well according to the following formula I;
wherein Z represents the dynamic reserve of the oil well when the current accumulated water substitution rate is D, K represents the preset recovery rate of the crude oil, and N0Represents a first oil production, wherein a is equal to or greater than 0 and B is equal to or greater than 0.
In some embodiments, the first formula is determined by:
according to the formula two: lgNp ═ lgA + BlgWp and formula three: lgWp ═ lgNp-lgD, yielding equation four:
wherein, Wp is the current accumulated water injection amount, and Np is the current accumulated oil production amount corresponding to Wp;
according to the formula four:
and formula five: Z-K (N)0+ Np) to obtain said formula one:
in some embodiments, the obtaining module 31 is further configured to:
and obtaining the A and the B in the formula III according to a plurality of accumulated water injection quantities of each sample oil well in the N sample oil wells and the accumulated oil production corresponding to each accumulated water injection quantity.
In some embodiments, the determining module 33 is configured to determine whether the current accumulated water displacement rate is less than a preset accumulated water displacement rate before the processing module 32 obtains the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well;
The processing module 32 is specifically configured to obtain the dynamic reserve volume of the oil well according to the current accumulated water displacement rate and the first oil production volume of the oil well when the judging module 33 judges that the current accumulated water displacement rate is smaller than a preset accumulated water displacement rate.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 4, the electronic device according to the embodiment may include: at least one processor 41 and a memory 42. Fig. 4 shows an electronic device as an example of a processor, wherein,
and a memory 42 for storing programs. In particular, the program may include program code comprising computer operating instructions. The memory 42 may comprise a Random Access Memory (RAM) and may also include a non-volatile memory (e.g., at least one disk memory).
A processor 41 for executing the computer-executable instructions stored in the memory 42 to implement the method for acquiring dynamic reserves of a well as shown in any of the above-mentioned method embodiments.
The processor 41 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present Application.
Alternatively, in a specific implementation, if the memory 42 and the processor 41 are implemented independently, the memory 42 and the processor 41 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The buses may be divided into address buses, data buses, control buses, etc., but do not represent only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 42 and the processor 41 are integrated on a chip, the memory 42 and the processor 41 may perform the same communication through an internal interface.
The electronic device described above in this embodiment may be configured to execute the technical solutions shown in the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media capable of storing program codes, such as Read-Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for obtaining a dynamic reserve of an oil well, comprising:
Acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount;
acquiring a current accumulated water displacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water displacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity;
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and a first oil production amount of the oil well, wherein the first oil production amount is the oil production amount obtained in the self-blowout development stage, and the self-blowout development stage is the stage of producing crude oil under the action of natural energy by the oil well.
2. The method of claim 1, wherein obtaining the dynamic reserve of the well based on the current accumulated water displacement rate and the first oil production of the well comprises:
and obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate, the first oil yield of the oil well and the preset recovery ratio of the crude oil in the oil well.
3. The method of claim 2, wherein obtaining a well dynamic reserve based on the current accumulated water displacement rate, the first oil production from the well, and a predetermined recovery factor for the crude oil in the well comprises:
Obtaining the dynamic reserves of the oil well according to the following formula I;
wherein Z represents the dynamic reserve of the oil well when the current accumulated water substitution rate is D, K represents the preset recovery rate of the crude oil, and N0Represents a first oil production, wherein a is equal to or greater than 0 and B is equal to or greater than 0.
4. The method of claim 3, wherein the formula one is determined by:
according to the formula two: lgNp ═ lgA + BlgWp and formula three: lgWp ═ lgNp-lgD, yielding equation four:
wherein, Wp is the current accumulated water injection amount, and Np is the current accumulated oil production amount corresponding to Wp;
according to the formula four:
and formula five: Z-K (N)0+ Np) to obtain said formula one:
5. the method of claim 3 or 4, further comprising:
and obtaining the A and the B in the formula II according to a plurality of accumulated water injection quantities of each sample oil well in the N sample oil wells and the accumulated oil production corresponding to each accumulated water injection quantity.
6. The method of claim 1, wherein prior to obtaining the dynamic reserve for the well based on the current accumulated water displacement rate and the first oil production for the well, further comprising:
judging whether the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate or not;
Obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well, and the method comprises the following steps:
and if the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate, obtaining the dynamic reserve volume of the oil well according to the current accumulated water replacement rate and the first oil production volume of the oil well.
7. An oil well dynamic reserve acquisition device, comprising:
the acquisition module is used for acquiring the current accumulated water injection amount of an oil well and the current accumulated oil production amount of the oil well corresponding to the current accumulated water injection amount;
the processing module is used for acquiring a current accumulated water replacement rate according to the current accumulated water injection quantity and the current accumulated oil production quantity, wherein the accumulated water replacement rate is the ratio of the current accumulated oil production quantity to the current accumulated water injection quantity; and the oil well is also used for obtaining the dynamic reserve of the oil well according to the current accumulated water displacement rate and the first oil production amount of the oil well, wherein the first oil production amount is the oil production amount obtained in the flowing development stage, and the flowing development stage is the stage of producing crude oil under the action of natural energy by the oil well.
8. The apparatus of claim 7, further comprising: a judgment module;
The judging module is used for judging whether the current accumulated water displacement rate is smaller than a preset accumulated water displacement rate or not before the processing module obtains the dynamic reserve volume of the oil well according to the current accumulated water displacement rate and the first oil yield of the oil well;
and the processing module is specifically used for obtaining the dynamic reserve volume of the oil well according to the current accumulated water replacement rate and the first oil production volume of the oil well when the judging module judges that the current accumulated water replacement rate is smaller than a preset accumulated water replacement rate.
9. An electronic device, comprising: a memory for storing program instructions and a processor for calling the program instructions in the memory to perform the well dynamic reserve acquisition method of any of claims 1-6.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program; the computer program, when executed, implements the method of well dynamic reserve acquisition according to any one of claims 1 to 6.
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