Method and device for determining injection amount of profile control agent, electronic equipment and storage medium

Abstract

Embodiments of the present application relate to a method and device for determining injection volume of a profile control agent, electronic equipment and a storage medium, the method comprising: obtaining porosity and profile control thickness of a profile control layer; obtaining a first profile control radius corresponding to a direction with the fastest water drive speed in a well group and a second profile control radius corresponding to other water drive speed directions; determining a profile control area according to the first profile control radius and the second profile control radius, and determining a proportion of the profile control area to a circular area corresponding to the first profile control radius as a correction coefficient; determining a water drive channel volume based on the porosity, the profile control thickness, the first profile control radius and the correction coefficient; obtaining a first ratio of a first target pore throat to a total pore throat volume in the profile control layer; and determining the injection volume of the profile control agent according to the water drive channel volume and the first ratio.

Description

Technical Field

[0001] This invention relates to the field of reservoir development technology, and in particular to a method, apparatus, electronic device and storage medium for determining the injection amount of a regulating agent. Background Technology

[0002] During water injection development in oilfields, reservoir heterogeneity and fracturing in some low-permeability reservoirs create dominant water flow channels. Injected water along these channels causes ineffective water circulation, leading to increased water cut and even water flooding in wells. Deep water injection well regulation technology is an important means to improve the effectiveness of water drive development.

[0003] In the implementation of deep well modulator / displacement (MDS) in water injection wells, determining a reasonable injection volume based on well pressure, well production dynamics, and economic benefits is a crucial technical aspect of MDS design and the foundation for ensuring effective MDS results. Currently, the design of MDS injection volume mainly relies on empirical methods, which involve appropriately increasing the injection volume based on the previous MDS cycle. This approach carries significant uncertainty. If the injection volume is too small, the MDS will not achieve its plugging purpose, while an excessive injection volume will increase costs and even waste materials. Summary of the Invention

[0004] The embodiments of the present invention provide a method, apparatus, electronic device and storage medium for determining the amount of modulating agent injected, so as to solve the technical problem of uncertainty in the amount of modulating agent currently used.

[0005] In a first aspect, embodiments of the present invention provide a method for determining the injection amount of a water-driving agent, comprising: obtaining the porosity and thickness of the water-driving layer; obtaining a first water-driving radius corresponding to the direction of the fastest water-driving velocity within the well group and a second water-driving radius corresponding to other water-driving velocity directions; determining the water-driving area based on the first and second water-driving radii, and determining the ratio of the water-driving area to the circular area corresponding to the first water-driving radius as a correction coefficient; determining the water-driving channel volume based on the porosity, water-driving thickness, first water-driving radius, and the correction coefficient; obtaining a first ratio of a first target pore throat to the total pore throat volume in the water-driving layer, wherein the first target pore throat is a pore throat with a pore throat radius greater than a first preset value; and determining the injection amount of the water-driving agent based on the water-driving channel volume and the first ratio.

[0006] In one embodiment of the present invention, the modulating agent includes a gel and microspheres; after determining the modulating agent injection amount based on the water-driven channel volume and the first ratio, the method further includes: obtaining a second ratio of the second target pore throat to the total pore throat volume, wherein the second target pore throat is a pore throat with a pore throat radius greater than a second preset value, and the second preset value is greater than the first preset value; determining the gel injection amount based on the modulating agent injection amount and the second ratio; and determining the microsphere injection amount based on the modulating agent injection amount and the gel injection amount.

[0007] As an embodiment of the present invention, the method further includes: determining a first preset value based on tracer data, and obtaining a pore throat histogram corresponding to the modulated driving layer based on mercury intrusion porosimetry, wherein the pore throat histogram records the ratio of pore throats with different pore throat radii to the total pore throat volume; obtaining the first ratio of the first target pore throat to the total pore throat volume in the modulated driving layer includes: determining the first ratio corresponding to the first target pore throat based on the pore throat histogram; obtaining the second ratio of the second target pore throat to the total pore throat volume includes: determining the second ratio corresponding to the second target pore throat based on the pore throat histogram.

[0008] As an embodiment of the present invention, obtaining the first adjustment radius corresponding to the direction of the fastest water drive velocity within the well group and the second adjustment radius corresponding to the other water drive velocity directions includes: determining the first oil-water well spacing corresponding to the direction of the fastest water drive velocity within the well group and the second oil-water well spacing corresponding to the other water drive velocity directions based on well group production dynamic data and tracer data; determining the first adjustment radius based on the first oil-water well spacing, and determining the second adjustment radius based on the second oil-water well spacing.

[0009] As an embodiment of the present invention, determining the first adjustment radius based on the first oil-water well spacing and determining the second adjustment radius based on the second oil-water well spacing includes: determining the product of the first oil-water well spacing and a third preset value as the first adjustment radius, and determining the product of the second oil-water well spacing and a fourth preset value as the second adjustment radius.

[0010] As an embodiment of the present invention, the third preset value is 2 / 3 and the fourth preset value is 1 / 2.

[0011] As an embodiment of the present invention, the formula for calculating the volume of the water-driven channel is as follows:

[0012]

[0013] Where v represents the volume of the water-drive channel, R represents the first adjustment radius, k represents the correction coefficient, and H represents the adjustment thickness. This indicates the porosity.

[0014] Secondly, embodiments of the present invention provide a device for determining the injection amount of a water-driving agent, comprising: an acquisition module, configured to acquire the porosity and thickness of the water-driving layer; acquire a first water-driving radius corresponding to the direction of the fastest water-driving velocity within the well group and a second water-driving radius corresponding to other water-driving velocity directions; a determination module, configured to determine the water-driving area based on the first and second water-driving radii, and determine the ratio of the water-driving area to the circular area corresponding to the first water-driving radius as a correction coefficient; and determine the water-driving channel volume based on the porosity, water-driving thickness, first water-driving radius, and the correction coefficient; the acquisition module is further configured to acquire a first ratio of a first target pore throat to the total pore throat volume in the water-driving layer, wherein the first target pore throat is a pore throat with a pore throat radius greater than a first preset value; and the determination module is further configured to determine the injection amount of the water-driving agent based on the water-driving channel volume and the first ratio.

[0015] Thirdly, embodiments of the present invention provide an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory is used to store computer programs; and the processor is used to implement the steps of the method for determining the amount of driving agent injection as described in any one of the first aspects when executing the program stored in the memory.

[0016] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of the method for determining the amount of driving agent injected as described in any of the first aspects.

[0017] The embodiments of the present invention provide a method, apparatus, electronic device, and storage medium for determining the injection amount of the regulating agent. This involves obtaining the porosity and thickness of the regulating layer; obtaining the first regulating radius corresponding to the direction of the fastest water drive velocity within the well group and the second regulating radius corresponding to other water drive velocity directions; determining the regulating area based on the first and second regulating radii, and determining the ratio of the regulating area to the circular area corresponding to the first regulating radius as a correction coefficient; determining the water drive channel volume based on the porosity, regulating thickness, first regulating radius, and the correction coefficient; obtaining the first ratio of the first target throat volume to the total throat volume in the regulating layer, where the first target throat is a throat with a throat radius greater than a first preset value; and determining the injection amount of the regulating agent based on the water drive channel volume and the first ratio. In other words, the embodiments of the present invention fully consider the range of oil layers used for regulating and have a strong focus on the design of the volume of the regulating and blocking water flow advantage channel. Furthermore, the data required for calculating the injection amount of the regulating agent is easy to obtain, the calculation process is simple, and the accuracy is high. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a method for determining the injection amount of a displacement agent according to an embodiment of the present invention;

[0021] Figure 2 A flowchart illustrating another method for determining the injection amount of the driving agent provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram illustrating the determination of a correction coefficient, provided as an embodiment of the present invention;

[0023] Figure 4 A pore throat histogram provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a device for determining the amount of driving agent injected, provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Influenced by regional tectonics and sedimentary environments, sandstone reservoirs in some areas are primarily complex fault-block reservoirs. After long-term water injection development, due to reservoir heterogeneity and fracturing in some low-permeability reservoirs, dominant water flow channels have formed. Injected water along these channels causes ineffective water circulation, leading to increased well water cut and even water flooding. Deep water injection well regulation technology, as an important means to improve the effectiveness of water drive development, effectively addresses planar and inter-layer contradictions, making a positive contribution to the stable production of old oilfields.

[0028] In the implementation of deep well modulator / displacement (MDS) in water injection wells, determining a reasonable injection volume based on well pressure, well production dynamics, and economic benefits is a crucial technical aspect of MDS design and the foundation for ensuring effective MDS results. Currently, the design of MDS injection volume mainly relies on empirical methods, which involve appropriately increasing the injection volume based on the previous MDS cycle. This approach carries significant uncertainty. If the injection volume is too small, the MDS will not achieve its plugging purpose, while an excessive injection volume will increase costs or even waste materials.

[0029] To address the aforementioned technical problems, the technical concept of this invention is as follows: by utilizing reservoir basic data, production dynamic data of water injection wells and oil production wells, the deep-seated injection volume of water injection wells is calculated. This fully considers the range of oil layers mobilized by the water injection and the dynamic response of oil and water wells, making the design of the volume of the water flow advantage channel for water injection highly targeted. At the same time, the data required for calculating the injection volume of water injection wells is easy to obtain, and the calculation process is simple and highly accurate.

[0030] Figure 1 This is a flowchart illustrating a method for determining the injection amount of a driving agent according to an embodiment of the present invention. The executing entity is a device for determining the injection amount of the driving agent, or an electronic device equipped with such a device. Figure 1 As shown, the method for determining the injection volume of the displacement agent includes:

[0031] Step S101: Obtain the porosity and thickness of the adjustment layer.

[0032] Specifically, the regulating layer refers to a formation with high permeability and high water absorption intensity, also known as the main water-absorbing layer. In this step, the porosity φ of the main water-absorbing layer can be determined, and the thickness H of the main water-absorbing layer can be determined using the water absorption profile data before water injection well regulation.

[0033] Step S102: Obtain the first adjustment radius corresponding to the direction of the fastest water drive speed in the well group and the second adjustment radius corresponding to the directions of other water drive speeds.

[0034] Specifically, the water drive effect between the injection wells and each oil well within the well group can be determined based on the well group's production dynamics data and tracer data. The faster the water drive speed, the more obvious the water drive effect, and the larger the radius of the water flow dominance channel (i.e., the adjustment radius) R. In this step, the maximum adjustment radius corresponding to the direction with the fastest water drive speed (i.e., the first adjustment radius) can be determined, and other adjustment radii corresponding to the slightly slower water drive speeds (i.e., the second adjustment radius) can be determined.

[0035] In some embodiments, step S102 includes: determining the first oil-water well spacing corresponding to the direction of fastest water drive velocity and the second oil-water well spacing corresponding to the direction of fastest water drive velocity within the well group based on well group production dynamic data and tracer data; determining the first adjustment radius based on the first oil-water well spacing; and determining the second adjustment radius based on the second oil-water well spacing.

[0036] Specifically, the faster the water drive speed, the more significant the water drive effect. Therefore, the direction with the fastest water drive speed can be called the primary effective direction, and the direction with a slightly slower water drive speed can be called the secondary effective direction. The well spacing between oil and water wells in the primary effective direction and the secondary effective direction can be obtained. The maximum adjustment radius can be determined based on the well spacing in the primary effective direction, and the adjustment radius R for other well directions can be determined based on the well spacing in the secondary effective direction.

[0037] In some embodiments, determining the first drive radius based on the first oil-water well spacing and the second drive radius based on the second oil-water well spacing includes: determining the product of the first oil-water well spacing and a third preset value as the first drive radius, and determining the product of the second oil-water well spacing and a fourth preset value as the second drive radius. In some embodiments, the third preset value is 2 / 3, and the fourth preset value is 1 / 2.

[0038] Specifically, when determining the radius R of the dominant water flow channel, R is 2 / 3 of the distance between oil and water wells in the main effective direction and 1 / 2 of the distance between oil and water wells in the weakly effective direction.

[0039] Step S103: Determine the adjustment area based on the first adjustment radius and the second adjustment radius, and determine the ratio of the adjustment area to the circular area corresponding to the first adjustment radius as a correction coefficient.

[0040] Specifically, since the water drive speed varies in different directions of oil wells, the water drive radius also varies. Therefore, a correction factor k needs to be considered when calculating the water drive channel area. The correction factor k is the proportion of the water drive area calculated based on 2 / 3 of the distance between oil and water wells in the main effective direction and 1 / 2 of the distance between weakly effective oil wells to the area of ​​the whole circle corresponding to the water drive radius in the main effective direction.

[0041] Step S104: Determine the water drive channel volume based on the porosity, the adjustment thickness, the first adjustment radius, and the correction coefficient.

[0042] In some embodiments, the formula (1) for calculating the volume of the water-driven channel is as follows:

[0043]

[0044] Wherein, v1 represents the volume of the water-driven channel, R represents the radius of the first adjustment drive, k represents the correction coefficient, and H represents the thickness of the adjustment drive. This indicates the porosity.

[0045] Step S105: Obtain the first ratio of the first target throat to the total volume of the throat in the driving layer, wherein the first target throat is a throat with a throat radius greater than a first preset value.

[0046] Specifically, in the regulating layer, there are high-permeability strips in the pore throats with larger radii (greater than the first preset value), which are more likely to form water flow dominant channels. The proportion of the larger pore throats in the total pore throat volume can be determined, and this proportion is used as the water drive channel volume ratio occupied by the water flow dominant channel.

[0047] In some embodiments, a first preset value is determined based on tracer data. Specifically, the radii of throats containing hypertonic channels are determined based on tracer monitoring data, and the first preset value is determined based on these throat radii.

[0048] Step S106: Determine the amount of driving agent injected based on the volume of the water drive channel and the first ratio.

[0049] Specifically, the pore volume of the water flow dominant channel = the water drive channel volume * the first ratio, where the pore volume of the water flow dominant channel is the amount of driving agent injected.

[0050] The method for determining the injection volume of the regulating agent provided in the embodiments of the present invention involves: obtaining the porosity and thickness of the regulating layer; obtaining the first regulating radius corresponding to the direction of the fastest water drive velocity in the well group and the second regulating radius corresponding to other water drive velocity directions; determining the regulating area based on the first and second regulating radii, and determining the ratio of the regulating area to the circular area corresponding to the first regulating radius as a correction coefficient; determining the water drive channel volume based on the porosity, regulating thickness, first regulating radius, and correction coefficient; obtaining the first ratio of the first target throat to the total throat volume in the regulating layer, wherein the first target throat is a throat with a throat radius greater than a first preset value; and determining the injection volume of the regulating agent based on the water drive channel volume and the first ratio. In other words, the embodiments of the present invention fully consider the range of oil layers used for regulating and the dynamic response of oil and water wells, and are highly targeted in designing the volume of the regulating and blocking water flow advantage channel. Furthermore, the data required for calculating the regulating injection volume of the water injection well is easy to obtain, the calculation process is simple, and the accuracy is high.

[0051] Based on the above embodiments, Figure 2 A flowchart illustrating another method for determining the injection volume of the displacement agent provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method for determining the injection volume of the displacement agent includes:

[0052] Step S201: Obtain the porosity and thickness of the adjustment layer.

[0053] Step S202: Obtain the first adjustment radius corresponding to the direction of the fastest water drive speed in the well group and the second adjustment radius corresponding to the directions of other water drive speeds.

[0054] Step S203: Determine the adjustment area based on the first adjustment radius and the second adjustment radius, and determine the ratio of the adjustment area to the circular area corresponding to the first adjustment radius as a correction coefficient.

[0055] Step S204: Determine the water drive channel volume based on the porosity, the adjustment thickness, the first adjustment radius, and the correction coefficient.

[0056] Step S205: Obtain the first ratio of the first target throat to the total volume of the throat in the driving layer, wherein the first target throat is a throat with a throat radius greater than a first preset value.

[0057] Step S206: Determine the amount of driving agent injected based on the volume of the water drive channel and the first ratio.

[0058] Step S207: Obtain the second ratio of the second target throat to the total volume of the throat. The second target throat is a throat with a throat radius greater than a second preset value, and the second preset value is greater than the first preset value.

[0059] Step S208: Determine the gel injection amount based on the amount of the driving agent injected and the second ratio.

[0060] Step S209: Determine the microsphere injection amount based on the amount of the driving agent injected and the amount of the gel injected.

[0061] The implementation of steps S201-S206 in this embodiment is similar to that of steps S101-S106 in the above embodiment, and will not be repeated here.

[0062] The difference from the above embodiments is that, in order to further improve the regulation effect, in this embodiment, the regulation agent includes a gel and microspheres, and a second ratio of the second target pore throat to the total volume of the pore throat is obtained. The second target pore throat is a pore throat with a pore throat radius greater than a second preset value, and the second preset value is greater than the first preset value. The gel injection amount is determined according to the amount of regulation agent injected and the second ratio. The microsphere injection amount is determined according to the amount of regulation agent injected and the amount of gel injected.

[0063] Specifically, the modulator is a microsphere-gel combination, and the modulator effect of the gel-microsphere combination is better than that of a single-segment plug. After determining the total amount of modulator injected, the amount of gel injected and the amount of microsphere injected are determined separately. Among them, the gel plug blocks the part of the pore throat with a larger radius (i.e., the pore throat with a blocking radius greater than the second preset value), and the ratio of the pore throat blocked by gel to the total pore throat volume is determined (i.e., the second ratio). The amount of gel injected is determined according to the total amount of modulator injected and this ratio, that is, the amount of gel injected = the total amount of modulator injected * the second ratio. The amount of microsphere injected is determined according to the total amount of modulator injected and the amount of gel injected, that is, the amount of microsphere injected = the total amount of modulator injected - the amount of gel injected.

[0064] In some embodiments, the method further includes: determining a first preset value based on tracer data, and obtaining a pore throat histogram corresponding to the modulated driving layer based on mercury intrusion porosimetry, wherein the pore throat histogram records the ratio of pore throats with different pore throat radii to the total pore throat volume; obtaining the first ratio of the first target pore throat to the total pore throat volume in the modulated driving layer in step S205 includes: determining the first ratio corresponding to the first target pore throat based on the pore throat histogram; obtaining the second ratio of the second target pore throat to the total pore throat volume in step S207 includes: determining the second ratio corresponding to the second target pore throat based on the pore throat histogram.

[0065] Specifically, based on tracer monitoring data, the radius of the throat with hypertonic channels (greater than the first preset value) is determined, and the proportion of such throats is determined based on the throat distribution histogram. Among them, the portion of throat radius blocked by gel plugs is larger, and the proportion of throat radius blocked by gel is determined based on the throat distribution map.

[0066] The method for determining the injection amount of the regulating agent provided in this embodiment of the invention includes a gel and microspheres; obtaining a second ratio of the volume of a second target pore throat to the total volume of the pore throat, wherein the second target pore throat is a pore throat with a radius greater than a second preset value, and the second preset value is greater than a first preset value; determining the gel injection amount based on the injection amount of the regulating agent and the second ratio; and determining the microsphere injection amount based on the injection amount of the regulating agent and the injection amount of the gel; that is, the regulating effect of the regulating agent through the combination of gel and microspheres is better than that of a single-segment plug regulating agent.

[0067] The following example demonstrates how to determine the injection volume of the driving agent for injection wells A and B. Figure 3 This is a schematic diagram illustrating the determination of a correction coefficient according to an embodiment of the present invention. Figure 4 This is a pore throat histogram provided as an embodiment of the present invention. Now, in conjunction with... Figure 3 and Figure 4 A detailed explanation is provided for injection well A, including the following steps:

[0068] Step 1: The main water-absorbing layer of injection well A is determined to be 20.3m long. According to the mechanism of regulating the flow to block the dominant water flow channel, the regulating agent preferentially enters this layer. The thickness H of the main water-absorbing layer is 20.3m, and the porosity φ of this layer is 15.3% on average.

[0069] Step 2: Based on the well group production dynamics and tracer data, the well spacing in the main effective direction is 225m. According to the radius of the water flow dominance channel, which is 2 / 3 of the well spacing between oil and water wells in the main effective direction, the radius of the water flow dominance channel of this well is determined to be 150m.

[0070] Step 3: Based on the dominant water flow channel radius of 150m in the main effective direction, and taking the well spacing from other oil wells as half, the calculated displacement area S is 42411㎡, approximately occupying the area of ​​the entire circle (e.g., Figure 3 The area enclosed by the dashed line in the diagram is 60%, therefore the correction factor k is 0.6.

[0071] Step 4: Calculate the volume of the water drive channel

[0072] Step 5: According to the tracer, hypertonic bands exist in throats with a radius greater than 4μm, making it easier for water flow to form dominant channels; according to Figure 4 The histogram showing the distribution of pore throats indicates that pore throats with a throat radius greater than 4 μm account for 7.4% of the total pore throat volume. This data is used as the ratio of the volume of the water-driven channel occupied by the dominant water flow channel.

[0073] Step 6: The total injection volume of the flow-dominant channel is V2 = water drive channel volume V1 * first ratio = 131726 * 0.074 = 9748 m³ 3 .

[0074] Step 7: Seal the portion of the pore throat with a gel segment plug, according to... Figure 4 The pore throat distribution diagram shown indicates that the proportion of pore throat radius blocked by gel is 1.9%. The gel injection volume = water-driven channel volume V1 * second ratio = 131726 * 0.019 = 2500 m³ 3 .

[0075] Step 8: Microsphere injection volume = Total volume of modulator injected - Gel injection volume = 9748 - 2500 = 7248m 3 .

[0076] For injection well B, the following steps are included:

[0077] Step 1: The water-absorbing layer of injection well B is 19.4m long. According to the mechanism of regulating the flow and blocking the dominant water flow channel, the regulating agent preferentially enters this layer. The thickness H of the water-absorbing layer is 19.4m. The porosity of this layer is... The average is 13.5%.

[0078] Step 2: According to the well group production dynamics and tracer data, the well spacing in the main effective direction is 220m. Based on the fact that the radius of the water flow dominant channel is 2 / 3 of the well spacing in the main effective direction, the radius of the water flow dominant channel in this well is 147m.

[0079] Step 3: Based on the radius of the dominant water flow channel in the main effective direction being 147m, and taking the well distance from other oil wells as 1 / 2, the adjustment area S is calculated to be 61098㎡, which accounts for about 90% of the total area of ​​the circle. Therefore, the correction factor k is 0.9.

[0080] Step 4: Calculate the volume of the water drive channel

[0081] Step 5: According to the tracer, hypertonic bands exist in throats with a radius greater than 4μm, making it easier for water flow to form dominant channels; according to Figure 3 The histogram showing the distribution of pore throats indicates that this type of pore throat accounts for 7.4% of the total pore throat volume. This data is used as the proportion of the water drive channel volume occupied by the dominant water flow channel.

[0082] Step 6: The total injection volume of the water drive is equal to the pore volume of the dominant water flow channel, V2 = water drive channel volume V1 * first ratio = 160015 * 0.074 = 11841 m³. 3 .

[0083] Step 7: Seal the portion of the pore throat with a gel segment plug, according to... Figure 3 The pore throat distribution diagram shown indicates that the pore throat radius of gel plugging accounts for 1.9%. The gel injection volume = water-driven channel volume V1 * second ratio = 160015 * 0.019 = 3040 m³. 3 .

[0084] Step 8: Microsphere injection volume = Total volume of modulator injected - Gel injection volume = 11841 - 3040 = 8801m 3 .

[0085] In summary, the embodiments of the present invention are based on the plugging radius R of the regulating drive system, the thickness H of the water absorption layer in the oil well, and the porosity of the oil layer. The volume of the water-drive dominant channel is determined by the correction coefficient k, and the proportion of the water-drive dominant channel is determined based on the pore throat distribution histogram. This data is used as the ratio of the water-drive dominant channel volume to the total volume of the water-drive dominant channel, thus determining the total injection volume of the water-drive dominant channel, which is the total injection volume of the modulating agent. Based on the portion of the pore throat radius that is blocked by the gel slug, the proportion of the pore throat radius blocked by the gel and the injection volume of the gel slug are determined. The injection volume of the microsphere slug is the total injection volume minus the injection volume of the gel slug. This embodiment of the invention uses reservoir basic data, production dynamic data of water injection wells and oil production wells to calculate the deep modulating injection volume of water injection wells. It fully considers the range of oil layers mobilized by the modulating and the dynamic response of oil and water wells, making the design of the volume of the water-drive dominant channel for modulating and blocking highly targeted. At the same time, the data required for calculating the modulating injection volume of water injection wells is easy to obtain, the calculation process is simple and highly accurate.

[0086] When this embodiment was applied to more than 80 blocks in an oilfield, a total of 960 well groups were implemented, resulting in an annual oil production increase of 143,000 tons, a reduction in natural decline of 3%, and an average increase in recovery rate of 3.2 percentage points in the implemented blocks. It can be seen that the amount of modulator injected determined by this embodiment can achieve a better modulator effect.

[0087] Figure 5 This is a schematic diagram of a device for determining the injection amount of a driving agent according to an embodiment of the present invention, as shown below. Figure 5 As shown, the device includes:

[0088] The acquisition module 501 is used to acquire the porosity and thickness of the water-drive layer; acquire the first water-drive radius corresponding to the direction with the fastest water-drive velocity within the well group and the second water-drive radius corresponding to other water-drive velocity directions; the determination module 502 is used to determine the water-drive area based on the first and second water-drive radii, and determine the ratio of the water-drive area to the circular area corresponding to the first water-drive radius as a correction coefficient; determine the water-drive channel volume based on the porosity, water-drive thickness, first water-drive radius, and correction coefficient; the acquisition module 501 is also used to acquire a first ratio of the first target pore throat to the total pore throat volume in the water-drive layer, where the first target pore throat is a pore throat with a pore throat radius greater than a first preset value; the determination module 502 is also used to determine the water-drive agent injection amount based on the water-drive channel volume and the first ratio.

[0089] In one embodiment of the present invention, the modulator includes a gel and microspheres; the acquisition module 501 is further configured to: acquire a second ratio of the second target pore throat to the total volume of the pore throat, wherein the second target pore throat is a pore throat with a pore throat radius greater than a second preset value, and the second preset value is greater than a first preset value; the determination module 502 is further configured to: determine the gel injection amount based on the modulator injection amount and the second ratio; and determine the microsphere injection amount based on the modulator injection amount and the gel injection amount.

[0090] As an embodiment of the present invention, the acquisition module 501 is further configured to: determine a first preset value based on tracer data, and acquire a pore throat histogram corresponding to the modulated layer based on mercury intrusion porosimetry, wherein the pore throat histogram records the ratio of pore throats with different pore throat radii to the total volume of pore throats; determine a first ratio corresponding to a first target pore throat based on the pore throat histogram; and determine a second ratio corresponding to a second target pore throat based on the pore throat histogram.

[0091] As an embodiment of the present invention, the acquisition module 501 is specifically used to: determine the first oil-water well spacing corresponding to the direction of the fastest water drive velocity in the well group and the second oil-water well spacing corresponding to the direction of the water drive velocity, based on the well group production dynamic data and tracer data; determine the first adjustment radius based on the first oil-water well spacing, and determine the second adjustment radius based on the second oil-water well spacing.

[0092] As an embodiment of the present invention, the acquisition module 501 is specifically used to: determine the product of the first oil-water well distance and the third preset value as the first adjustment radius, and determine the product of the second oil-water well distance and the fourth preset value as the second adjustment radius.

[0093] As an embodiment of the present invention, the third preset value is 2 / 3 and the fourth preset value is 1 / 2.

[0094] As an embodiment of the present invention, the formula for calculating the volume of the water-driven channel is as follows:

[0095]

[0096] Where v represents the volume of the water-drive channel, R represents the first adjustment radius, k represents the correction coefficient, and H represents the adjustment thickness. This indicates the porosity.

[0097] The device for determining the amount of driving agent injected provided in this embodiment of the invention has a similar implementation principle and technical effect to the above embodiments, and will not be described again here.

[0098] like Figure 6 As shown, this embodiment of the invention provides an electronic device, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 communicate with each other via the communication bus 604.

[0099] Memory 603 is used to store computer programs;

[0100] In one embodiment of the present invention, when the processor 601 executes the program stored in the memory 603, it implements the steps of the method for determining the amount of driving agent injection provided in any of the foregoing method embodiments.

[0101] The electronic device provided in this embodiment of the invention has a similar implementation principle and technical effect to the above embodiments, and will not be described again here.

[0102] The aforementioned memory 603 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 603 has storage space for program code used to perform any of the method steps described above. For example, the storage space for program code may include individual program codes for implementing the various steps in the methods described above. This program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, optical discs (CDs), memory cards, or floppy disks. Such computer program products are typically portable or fixed storage units. The storage unit may have storage segments or storage spaces arranged similarly to memory 603 in the aforementioned electronic device. The program code may be compressed, for example, in a suitable form. Typically, the storage unit includes programs for performing the method steps according to embodiments of the invention, i.e., code that can be read by a processor such as 601, which, when run by the electronic device, causes the electronic device to perform the various steps in the methods described above.

[0103] Embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for determining the amount of driving agent injected as described above.

[0104] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement the method according to the embodiments of the present invention.

[0105] According to embodiments of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, such as including, but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0107] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for determining the injection amount of a displacement agent, characterized in that, include: Obtain the porosity and thickness of the modulated driving layer; Obtain the first adjustment radius corresponding to the direction of the fastest water drive velocity within the well group and the second adjustment radius corresponding to the other water drive velocity directions; The adjustment area is determined based on the first adjustment radius and the second adjustment radius, and the ratio of the adjustment area to the circular area corresponding to the first adjustment radius is determined as a correction coefficient. The volume of the water drive channel is determined based on the porosity, the adjustment thickness, the first adjustment radius, and the correction coefficient. Obtain the first ratio of the first target throat volume to the total throat volume in the driving layer, wherein the first target throat is a throat with a throat radius greater than a first preset value; The amount of driving agent injected is determined based on the volume of the water drive channel and the first ratio.

2. The method according to claim 1, characterized in that, The modulating agent comprises a gel and microspheres; after determining the amount of modulating agent injected based on the water-drive channel volume and the first ratio, the method further includes: Obtain a second ratio of the second target throat to the total volume of the throat, wherein the second target throat is a throat with a throat radius greater than a second preset value, and the second preset value is greater than the first preset value; The gel injection volume is determined based on the amount of the regulating agent injected and the second ratio; The microsphere injection amount is determined based on the injection amount of the driving agent and the injection amount of the gel.

3. The method according to claim 2, characterized in that, The method further includes: The first preset value is determined based on the tracer data, and the pore throat histogram corresponding to the driving layer is obtained based on the mercury intrusion porosimetry method. The pore throat histogram records the ratio of the pore throat with different pore throat radii to the total pore throat volume. The step of obtaining the first ratio of the first target pore throat to the total volume of the pore throat in the driving layer includes: determining the first ratio corresponding to the first target pore throat according to the pore throat histogram; The step of obtaining the second ratio of the second target pore throat to the total pore throat volume includes: determining the second ratio corresponding to the second target pore throat based on the pore throat histogram.

4. The method according to any one of claims 1-3, characterized in that, The first adjustment radius corresponding to the direction of the fastest water drive velocity within the well group and the second adjustment radius corresponding to the other water drive velocity directions include: Based on the production dynamics data and tracer data of the well group, determine the well spacing of the first oil and water wells corresponding to the direction of the fastest water drive velocity and the well spacing of the second oil and water wells corresponding to the direction of the water drive velocity. The first adjustment radius is determined based on the first oil-water well spacing, and the second adjustment radius is determined based on the second oil-water well spacing.

5. The method according to claim 4, characterized in that, The step of determining the first drive radius based on the first oil-water well spacing and the second drive radius based on the second oil-water well spacing includes: The product of the first oil and water well distance and the third preset value is determined as the first drive radius, and the product of the second oil and water well distance and the fourth preset value is determined as the second drive radius.

6. The method according to claim 5, characterized in that, The third preset value is 2 / 3, and the fourth preset value is 1 / 2.

7. The method according to any one of claims 1-3, characterized in that, The formula for calculating the volume of the water drive channel is as follows: Where v represents the volume of the water-drive channel, R represents the first adjustment radius, k represents the correction coefficient, and H represents the adjustment thickness. This indicates the porosity.

8. A device for determining the injection amount of a driving agent, characterized in that, include: The acquisition module is used to acquire the porosity and thickness of the controlled-drive layer; and to acquire the first controlled-drive radius corresponding to the direction of the fastest water drive velocity and the second controlled-drive radius corresponding to the other water drive velocity directions within the well group. The determining module is used to determine the driving area based on the first driving radius and the second driving radius, and to determine the ratio of the driving area to the circular area corresponding to the first driving radius as a correction coefficient; and to determine the water drive channel volume based on the porosity, driving thickness, first driving radius and the correction coefficient. The acquisition module is further configured to acquire a first ratio of the first target throat to the total volume of the throat in the driving layer, wherein the first target throat is a throat with a throat radius greater than a first preset value; The determining module is further configured to determine the amount of driving agent injected based on the volume of the water drive channel and the first ratio.

9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in a memory, implements the steps of the method for determining the amount of driving agent injected according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for determining the amount of driving agent injected as described in any one of claims 1-7.

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