Method for measuring and calculating using amount of inorganic microgel in carbonate reservoir

Abstract

The invention relates to the technical field of oil exploitation, in particular to a method for measuring and calculating the using amount of inorganic microgel in a carbonate reservoir. According to the method, the maximum seepage resistance of the inorganic microgel under different injection amounts is obtained through experiments, inter-well heterogeneous parameters are obtained through inter-well channel inversion, and a water content prediction model considering intra-layer heterogeneity, inter-layer heterogeneity and an equivalent resistance coefficient is established. By designing different inorganic microgel injection amounts, the water content change and the oil increasing amount are predicted, and then the optimal use amount of the inorganic microgel is determined according to the principle of effect + economy.

Description

Technical Field

[0001] The present disclosure relates to the technical field of oil extraction, and in particular to a method for calculating the dosage of inorganic microgel in carbonate reservoirs. Background Art

[0002] After years of water flooding development, carbonate oil reservoirs usually face the "two lows" problem: the water flooding effect is low and the dominant channel is severely developed; the water flooding recovery rate is low, but the remaining oil is abundant and there is a large potential for development. There is an urgent need to expand the reservoir swept volume and improve the recovery rate of carbonate oil reservoirs.

[0003] To effectively block water channeling in high-permeability zones, increase oil recovery efficiency in low-permeability zones, and improve waterflooding development, many oilfields are vigorously developing and promoting profile control and water plugging technologies. Experts and scholars have achieved considerable success through laboratory and field experiments. Several high-performance plugging agents have been applied in field operations, accompanied by mature construction techniques. However, significant deficiencies remain in their research and application. Due to varying degrees of heterogeneity between wells, the distribution of injected plugging agents varies, making it difficult to accurately measure the dosage.

[0004] To establish an accurate method for calculating the dosage of inorganic microgels, two difficult problems need to be overcome. One is the inversion of inter-well heterogeneity parameters, which is crucial for the distribution relationship of the flow to the oil wells after the injection of inorganic microgels. The other is the inorganic microgel residual resistance coefficient experiment, which requires clarifying the resistance characteristics that different inorganic microgel dosages can produce in formations with different water penetration degrees. Summary of the Invention

[0005] In response to the above problems, the present disclosure provides a method for measuring the dosage of inorganic microgel in carbonate oil reservoirs.

[0006] In a first aspect, the present disclosure provides a method for calculating the amount of inorganic microgel used in carbonate oil reservoirs, the method comprising:

[0007] S101, establish the relationship between the inorganic microgel injection rate per well and the oil production increase of the well group;

[0008] S102, determining the optimal injection amount of the inorganic microgel according to the economic effect relationship.

[0009] Furthermore, the relationship between the inorganic microgel injection rate per well and the oil production increase of the well group is established, including:

[0010] According to the single well injection volume V, calculate the single well injection pv number;

[0011] According to the relationship between the injection pv number and the maximum seepage resistance, the maximum seepage resistance Rff is obtained. max ;

[0012] Through the maximum seepage resistance Rffmax , the equivalent seepage resistance relationship after the injection of inorganic microgel was obtained;

[0013] Calculate the single well oil production increase Q based on the equivalent seepage resistance relationship o .

[0014] Furthermore, the single well injection volume V is used to calculate the single well injection pv number, including:

[0015] The single-well injection PV number is calculated based on the single-well control volume and the inorganic microgel control volume. The formula is as follows:

[0016]

[0017] Where, h is the thickness of the production layer, m; pv is the ratio of the inorganic microgel injection volume to the single-well controlled pore volume; α is the single-well control ratio, rad; and r is the single-well control radius, m.

[0018] Furthermore, the relationship between the injection PV number and the maximum seepage resistance is used to express the relationship between the injection PV number and the maximum seepage resistance of a single well;

[0019] The relationship between the injected PV number and the maximum seepage resistance is determined experimentally.

[0020] Furthermore, the equivalent seepage resistance relationship is used to express the relationship between the seepage resistance Rff and time t, in the form of an equivalent seepage resistance curve Rff(t) of the entire cycle.

[0021] Furthermore, the equivalent seepage resistance relationship is obtained by the equation R(t)=at b (830-t) c +1 is obtained by fitting three characteristic points, where R(t) represents the equivalent water drive resistance coefficient corresponding to time t; t is the time after the injection of inorganic microgel, days; a, b, and c are the parameters to be fitted.

[0022] Furthermore, three feature points include: (0,1), (Δt, Rff max ), (730, 1);

[0023] Where, (Δt, Rff max ) indicates that the equation R(t) obtains the maximum seepage resistance Rff at Δt max Δt is the moment corresponding to the maximum seepage resistance, that is, the moment when the injection of inorganic microgel ends.

[0024] Furthermore, the equivalent seepage resistance relationship is obtained by the equation R(t)=at b (830-t) c +1 is obtained by fitting three feature points, including:

[0025] By R(t)=at b (830-t) c +1 fits three characteristic points, and the constraint equation R(t) obtains the maximum value Rff at Δt max , taking the derivative of equation R(t) we get:

[0026] R'(t)=abt b-1 (830-t) c -act b (830-t) c-1 ;

[0027] Let R'(t) = 0, and we get:

[0028]

[0029]

[0030] Substituting the fitted parameters a and b into the equivalent seepage resistance curve R(t) after the injection of inorganic microgels;

[0031] Shifting the equation R(t) to the right by t1 as a whole, we can obtain the equivalent seepage resistance curve Rff(t) of the entire cycle:

[0032]

[0033] Where Rff(t) is used to express the relationship between the seepage resistance Rff and time t, T is the effective period of the inorganic microgel + 100 days; t1 is the injection time of the inorganic microgel, days.

[0034] Furthermore, according to the equivalent seepage resistance relationship, the single well oil increase Q is calculated. o ,include:

[0035] Calculate the water content curve f for water flooding w And the moisture content curve f' after injection of inorganic microgel w ;

[0036] The oil increase after injection of inorganic microgel is calculated as follows:

[0037]

[0038] Where q is the production schedule of the oil well, t / d; t is the production time, days.

[0039] Furthermore, the water content curve f of water flooding is calculated w ,include:

[0040] Calculate the correction factor α for water flooding:

[0041]

[0042] Where, J k is the extremely poor permeability of the crossflow channel; m is the ratio of the layer where the crossflow channel is located to the production layer thickness, %; μ w is the viscosity of the water phase, mPa·s; μ0 is the viscosity of the oil phase, mPa·s;

[0043] Calculate the water content curve f for water flooding w :

[0044]

[0045] Where erfc is the complementary error function; x is the injection and production well data, m; u is the injection fluid seepage velocity, cm / s; t' is the correction time; D is the equivalent diffusion coefficient, cm 2 / s;f w0 is the initial moisture content at the output end.

[0046] Furthermore, the moisture content curve f' after injection of inorganic microgel w ,include:

[0047] Calculate the correction factor α' after injection of inorganic microgel:

[0048]

[0049] Where, J k is the extremely poor permeability of the crossflow channel; m is the ratio of the layer where the crossflow channel is located to the production layer thickness, %; μ w is the viscosity of the water phase, mPa·s; μ0 is the viscosity of the oil phase, mPa·s;

[0050] Calculate the moisture content curve f' after injecting inorganic microgel w :

[0051]

[0052] Where erfc is the complementary error function; x is the injection and production well data, m; u is the injection fluid seepage velocity, cm / s; t' is the correction time; D is the equivalent diffusion coefficient, cm 2 / s;f w0 is the initial moisture content at the output end.

[0053] Furthermore, the optimal injection amount of the inorganic microgel is determined based on the economic effect relationship, including:

[0054] The optimal injection rate of inorganic microgel is determined by calculating the input-output ratio of the single-well injection rate of inorganic microgel and the oil production increase of the well group.

[0055] The single-well injection rate of inorganic microgel when the input-output ratio is the maximum is the optimal injection rate of inorganic microgel.

[0056] Furthermore, the optimal injection amount of inorganic microgel is determined by the following formula:

[0057] max(Q o p o -Q Gel p Gel );

[0058] Where p o is the international oil price, USD / t; p Gel is the price of inorganic microgel, USD / t; Q o is the oil increase after injection of inorganic microgel, t; Q Gel is the injection amount of inorganic microgel, t.

[0059] In a second aspect, the present disclosure provides a carbonate reservoir inorganic microgel dosage measurement device, comprising: a relationship establishment unit and an injection quantity determination unit;

[0060] A relationship building unit is used to establish the relationship between the inorganic microgel single well injection volume and the oil production increase of the well group;

[0061] The injection amount determination unit is used to determine the optimal injection amount of the inorganic microgel according to the economic effect relationship.

[0062] In a third aspect, the present disclosure provides an electronic device, comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0063] a memory storing a computer program;

[0064] The processor is configured to implement the above-mentioned method for calculating the amount of inorganic microgel used in carbonate oil reservoirs when executing the computer program stored in the memory.

[0065] In a fourth aspect, the present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for calculating the amount of inorganic microgel used in carbonate oil reservoirs.

[0066] The present disclosure has at least the following beneficial effects:

[0067] The present disclosure provides a method for calculating the amount of inorganic microgel used in carbonate reservoir flooding, so as to more accurately predict the oil production increase of each well after flooding and improve the efficiency of the oil field.

[0068] Other features and advantages of the present disclosure will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present disclosure. The purpose and other advantages of the present disclosure can be achieved and obtained through the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0070] Figure 1 A flow chart of a method for designing an embodiment of the present disclosure;

[0071] Figure 2 This is a detailed flow chart for calculating the amount of inorganic microgel used in the embodiment of the present disclosure;

[0072] Figure 3 Schematic diagram of the maximum percolation resistance curve of the inorganic microgel according to the embodiment of the present disclosure;

[0073] Figure 4 This is a schematic diagram of the percolation resistance curve fitting of the inorganic microgel according to the embodiment of the present disclosure;

[0074] Figure 5 A schematic diagram of the structure of a device designed for an embodiment of the present disclosure;

[0075] Figure 6 It is a schematic diagram of the structure of an electronic device;

[0076] Figure 7 Schematic diagram of the maximum percolation resistance curve of inorganic microgel;

[0077] Figure 8 Schematic diagram of the equivalent seepage resistance curve after the injection of inorganic microgel into well 2617;

[0078] Figure 9 This is a schematic diagram of the water cut curve for water flooding;

[0079] Figure 10 Schematic diagram of the moisture content curve after injection of inorganic microgel;

[0080] Figure 11 This is a schematic diagram of the relationship between the oil increase and injection volume of the well group;

[0081] Figure 12 This is a schematic diagram of the relationship between well group injection volume and profit. DETAILED DESCRIPTION

[0082] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0083] This paper experimentally determined the maximum seepage resistance of inorganic microgel at different injection rates. Interwell heterogeneity parameters were obtained through interwell channel inversion. A water cut prediction model was established that considers intra-layer heterogeneity, inter-layer heterogeneity, and the equivalent resistance coefficient. By designing different inorganic microgel injection rates, changes in water cut and oil production were predicted. The optimal dosage of inorganic microgel was then determined based on the principle of both effectiveness and economy.

[0084] like Figure 1 As shown, the present disclosure provides a method for calculating the amount of inorganic microgel used in carbonate oil reservoirs, the method comprising:

[0085] S101, establish the relationship between the inorganic microgel injection rate per well and the oil production increase of the well group;

[0086] S102, determining the optimal injection amount of the inorganic microgel according to the economic effect relationship.

[0087] In one embodiment, establishing a relationship between the inorganic microgel injection rate per well and the oil production increase of a well group includes:

[0088] According to the single well injection volume V, calculate the single well injection pv number;

[0089] According to the relationship between the injection pv number and the maximum seepage resistance, the maximum seepage resistance Rff is obtained. max ;

[0090] Through the maximum seepage resistance Rff max , the equivalent seepage resistance relationship after the injection of inorganic microgel was obtained;

[0091] Calculate the single well oil production increase Q based on the equivalent seepage resistance relationship o .

[0092] When implementing it specifically, Figure 2 As shown, it includes the following steps:

[0093] 1. Input parameters;

[0094] Equivalent diffusion coefficient D, cm 2 / s; injection fluid seepage velocity u, cm / s; correction time t', d; water content corresponding to the initial oil saturation of the reservoir f w0 ; Crossflow channel permeability difference Jk ; Production layer thickness h, m; The ratio of high permeability layer in crossflow channel to production layer thickness m, %; Water phase viscosity μ w , mPa·s; oil phase viscosity μ o , mPa·s. The maximum percolation resistance curve of the inorganic microgel used in the experiment (such as Figure 3 (as shown); inorganic microgel effective period T, d; inorganic microgel effective period t1, d; single well control ratio α, rad; single well control radius r, m; oil well production system q, t / d; international oil price p o , US dollars / t; inorganic microgel price p Gel , US dollars / t;.

[0095] 2. Principle of equivalent seepage resistance curve fitting after injection of inorganic microgel;

[0096] (1) Assuming that the inorganic microgel is injected at time t1, the equivalent seepage resistance reaches its maximum value at the end of the injection, and the inorganic microgel fails two years after the injection (the equivalent seepage resistance is 1 at this time);

[0097] (2) At this time, there are three feature points (0,1), (Δt, Rff max ), (730, 1);

[0098] (3) Through R(t) = at b (830-t) c +1 fits three characteristic points, and the constraint equation R(t) obtains the maximum value Rff at Δt max , taking the derivative of equation R(t) we get:

[0099] R'(t)=abt b-1 (830-t) c -act b (830-t) c-1 (1)

[0100] Let R'(t) = 0, we can get:

[0101]

[0102] Thus we get:

[0103]

[0104] (4) Substituting the fitted parameters a and b into formula (3) yields the equivalent seepage resistance curve R(t) after the injection of inorganic microgel. The characteristic diagram is shown in the figure below: Figure 4 shown.

[0105] (5) Shift equation R(t) rightward by t1 as a whole to obtain the equivalent seepage resistance curve Rff(t) of the entire cycle.

[0106]

[0107] 3. Inorganic microgel dosage calculation steps;

[0108] (1) Set the single well injection volume V and calculate the single well injection pv number based on the single well control volume and the inorganic microgel control volume:

[0109]

[0110] (2) According to the experimental relationship between the injection PV number and the maximum seepage resistance, the maximum seepage resistance is:

[0111] Rff max ~pv(6)

[0112] (3) According to the injection time, maximum seepage resistance Rff max , the equivalent seepage resistance curve Rff(t) after injection of inorganic microgel is fitted through step 2.

[0113] (4) Calculate the water content curve f of water drive w :

[0114] Calculate the correction factor α for water flooding:

[0115]

[0116] Calculate the water content curve f for water flooding w :

[0117]

[0118] (5) Calculate the moisture content curve f' after injection of inorganic microgel w :

[0119] Calculate the correction factor α' after injection of inorganic microgel:

[0120]

[0121] Calculate the moisture content curve f' after injecting inorganic microgel w :

[0122]

[0123] (6) Calculate the incremental oil production Q of a single well o :

[0124] Assuming that the liquid production is a constant value, the reduced water content is the oil increase after the injection of inorganic microgel.

[0125]

[0126] (7) Design different total injection volumes V to obtain different well group oil production increases Q o , according to the principle of effect + economy, the optimal injection amount of inorganic microgel is determined:

[0127] max(Q o p o -Q Gel p Gel ) (12)

[0128] Where: p o is the international oil price, USD / t; p Gel is the price of inorganic microgel, US dollars / t.

[0129] like Figure 5 As shown, a carbonate reservoir inorganic microgel dosage measurement device includes: a relationship establishment unit 501 and an injection amount determination unit 502;

[0130] A relationship establishing unit 501 is used to establish a relationship between the inorganic microgel single well injection volume and the oil production increase of the well group;

[0131] The injection amount determination unit 502 is used to determine the optimal injection amount of the inorganic microgel according to the economic effect relationship.

[0132] like Figure 6 As shown, the present disclosure 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 through the communication bus 604;

[0133] Memory 603, storing computer programs;

[0134] The processor 601 is configured to implement the above-mentioned method for calculating the amount of inorganic microgel used in carbonate oil reservoirs when executing the computer program stored in the memory 603 .

[0135] The present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for calculating the amount of inorganic microgel used in carbonate oil reservoirs.

[0136] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments, or may exist independently without being incorporated into the device / apparatus. The computer-readable storage medium carries one or more programs, which, when executed, implement the method according to the embodiments of the present disclosure.

[0137] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, such as, but not limited to, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a 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.

[0138] In order to enable those skilled in the art to better understand the present disclosure, the principles of the present disclosure are described as follows with reference to the accompanying drawings:

[0139] Well 2617 in a certain well area was selected. Well 2617 was put into production in August 2011. Interwell channel inversion was carried out on it, and the interwell heterogeneity parameters were obtained as shown in Table 1.

[0140] Table 1 Inversion parameters of the interwell channel of Well 2617

[0141]

[0142] (1) Set the injection volume of well 2617 to 300m 3 , calculate the single well injection PV number according to formula (5):

[0143]

[0144] (2) According to the experimental relationship between the injection pv number and the maximum seepage resistance ( Figure 7 ) to obtain the maximum seepage resistance:

[0145] Rff max =1.482

[0146] (3) Fitting the equivalent seepage resistance curve after injection of inorganic microgel:

[0147] Well 2617 was put into production on August 1, 2011, with a production of 23.7m 3 / d fixed solution production, and the inorganic microgel was injected on June 1, 2016 (day 1766).

[0148] There are three characteristic points: (0, 1), (100, 1.482), and (730, 1).

[0149] By fitting these three feature points through formula (3), we can get:

[0150] a=8.74×10 -10 ,b=3.82×10 -1

[0151] Therefore, the equation of the equivalent seepage resistance curve after injecting inorganic microgel is:

[0152]

[0153] The equivalent seepage resistance during the entire production process is as follows: Figure 8 shown.

[0154] (4) Calculate the water content curve of water flooding:

[0155] Calculate the correction factor α for water flooding:

[0156]

[0157] Calculate the water content curve f for water flooding w ( Figure 9 ):

[0158]

[0159] (5) Calculate the moisture content curve after injection of inorganic microgel:

[0160] Calculate the correction factor α' after injection of inorganic microgel:

[0161]

[0162] Calculate the moisture content curve f' after injecting inorganic microgel w ( Figure 10 ):

[0163]

[0164] (6) Calculate the amount of oil increase:

[0165] Assuming that the liquid production is a constant value, the reduced water content is the oil increase after the injection of inorganic microgel.

[0166]

[0167] (7) Design different inorganic microgel injection amounts and calculate the corresponding oil increase:

[0168] Design 300~2000m 3 The amount of inorganic microgel injected and the calculated oil increase are shown in Table 2:

[0169] Table 2 Oil increase corresponding to injection volume

[0170]

[0171] Draw a graph showing the relationship between the amount of inorganic microgel injected and the oil production increase of Well 2617 ( Figure 11 ).

[0172] (8) Taking the dosage of inorganic microgel and the benefit of oil increase as the objective function, determine the optimal injection volume.

[0173] Inorganic microgel price: $3,500 / ton; Brent crude oil price on May 5, 2023: $72.61 / barrel

[0174] max(Q o p o -Q Gel p Gel )=max(72.61Q o -3500Q Gel )

[0175] The calculated results are shown in Table 3:

[0176] Table 3 Profits corresponding to the amount of inorganic microgel injected

[0177]

[0178] The relationship between injection amount and profit is as follows Figure 12 As shown in the figure, based on the constraints of oil change rate and profit, the recommended optimal injection amount of inorganic microgel is 300-500m 3 .

[0179] Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for calculating the amount of inorganic microgel used in carbonate oil reservoirs, characterized in that: The method comprises: The relationship between the single-well injection rate of inorganic microgel and the oil production increase of the well group was established, and the optimal injection rate of inorganic microgel was determined based on the economic effect relationship.

2. The method for calculating the amount of inorganic microgel in carbonate reservoirs according to claim 1, wherein: Establish the relationship between the inorganic microgel injection rate per well and the oil production increase of the well group, including: According to the single well injection volume V, calculate the single well injection pv number; According to the relationship between the injection pv number and the maximum seepage resistance, the maximum seepage resistance Rff is obtained. max ; Through the maximum seepage resistance Rff max , the equivalent seepage resistance relationship after the injection of inorganic microgel was obtained; Calculate the single well oil production increase Q based on the equivalent seepage resistance relationship o .

3. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 2, wherein: According to the single well injection volume V, calculate the single well injection pv number, including: The single-well injection PV number is calculated based on the single-well control volume and the inorganic microgel control volume. The formula is as follows: Wherein, h is the thickness of the production layer, in m; pv is the ratio of the inorganic microgel injection volume to the pore volume controlled by a single well; α is the single well control ratio, in rad; and r is the single well control radius, in m.

4. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 2, wherein: The relationship between the injection PV number and the maximum seepage resistance is used to express the relationship between the injection PV number and the maximum seepage resistance of a single well; The relationship between the injected PV number and the maximum seepage resistance is determined experimentally.

5. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 2, wherein: The equivalent seepage resistance relationship is used to express the relationship between the seepage resistance Rff and time t, in the form of the equivalent seepage resistance curve Rff(t) of the entire cycle.

6. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 2, wherein: The equivalent seepage resistance relationship is obtained by the equation R(t)=at b (830-t) c +1 is obtained by fitting three characteristic points, where R(t) represents the equivalent water drive resistance coefficient corresponding to time t; t is the time after the injection of inorganic microgel, in days; a, b, and c are the parameters to be fitted.

7. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 6, wherein: Three feature points, including: (0,1), (Δt, Rff max ), (730, 1); Where, (Δt, Rff max ) indicates that the equation R(t) obtains the maximum seepage resistance Rff at Δt max ; Δt is the moment corresponding to the maximum seepage resistance, that is, the moment when the injection of inorganic microgel is completed.

8. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 7, wherein: The equivalent seepage resistance relationship is obtained by the equation R(t)=at b (830-t) c +1 is obtained by fitting three feature points, including: By R(t)=at b (830-t) c +1 fits three characteristic points, and the constraint equation R(t) obtains the maximum value Rff at Δt max , taking the derivative of equation R(t) we get: R'(t)=abt b-1 (830-t) c -act b (830-t) c-1 ; Let R'(t) = 0, and we get: Substituting the fitted parameters a and b into the equivalent seepage resistance curve R(t) after the injection of inorganic microgels; Shifting the equation R(t) to the right by t1 as a whole, we can obtain the equivalent seepage resistance curve Rff(t) of the entire cycle: Where Rff(t) is used to express the relationship between the seepage resistance Rff and time t, T is the effective period of the inorganic microgel + 100, in days; t1 is the injection time of the inorganic microgel, in days.

9. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 2, wherein: Calculate the single well oil production increase Q based on the equivalent seepage resistance relationship o ,include: Calculate the water content curve f for water flooding w And the moisture content curve f' after injection of inorganic microgel w ; The oil increase after injection of inorganic microgel is calculated as follows: Where q is the production system of the oil well, in t / d; t is the production time, in days.

10. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 9, wherein: Calculate the water content curve f for water flooding w ,include: Calculate the correction factor α for water flooding: Where, J k The permeability of the crossflow channel is extremely poor; m is the percentage of the layer where the crossflow channel is located in the production layer thickness; μ w is the viscosity of the water phase, in mPa·s; μ0 is the viscosity of the oil phase, in mPa·s; Calculate the water content curve f for water flooding w : Where erfc is the complementary error function; x is the injection and production well data, unit is m; u is the injection fluid seepage velocity, unit is cm / s; t' is the correction time; D is the equivalent diffusion coefficient, unit is cm 2 / s;f w0 is the initial moisture content at the output end.

11. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 9, wherein: Moisture content curve f' after injection of inorganic microgel w ,include: Calculate the correction factor α' after injection of inorganic microgel: Where, J k The permeability of the crossflow channel is extremely poor; m is the percentage of the layer where the crossflow channel is located in the production layer thickness; μ w is the viscosity of the water phase, in mPa·s; μ0 is the viscosity of the oil phase, in mPa·s; Calculate the moisture content curve f' after injecting inorganic microgel w Where erfc is the complementary error function; x is the injection and production well data, unit is m; u is the injection fluid seepage velocity, unit is cm / s; t' is the correction time; D is the equivalent diffusion coefficient, unit is cm 2 / s;f w0 is the initial moisture content at the output end.

12. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 9, wherein: The optimal injection amount of inorganic microgel is determined based on the economic effect relationship, including: The optimal injection rate of inorganic microgel is determined by calculating the input-output ratio of the single-well injection rate of inorganic microgel and the oil production increase of the well group. The single-well injection rate of inorganic microgel when the input-output ratio is the maximum is the optimal injection rate of inorganic microgel.

13. The method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to claim 12, wherein: The optimal injection amount of inorganic microgel is determined by the following formula: max(Q o p o -Q Gel p Gel ); Where p o is the international oil price, in US dollars / t; p Gel is the price of inorganic microgel, in US dollars / t; Q o is the oil increase after injection of inorganic microgel, unit is t; Q Gel is the amount of inorganic microgel injected, unit: t.

14. A device for measuring the amount of inorganic microgel in carbonate oil reservoirs, characterized in that: include: a relationship establishing unit and an injection amount determining unit; A relationship building unit is used to establish the relationship between the inorganic microgel single well injection volume and the oil production increase of the well group; The injection amount determination unit is used to determine the optimal injection amount of the inorganic microgel according to the economic effect relationship.

15. An electronic device, characterized in that: The processor, the communication interface, the memory and the communication bus are connected to each other via the communication bus. a memory storing a computer program; The processor is configured to implement the method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to any one of claims 1 to 13 when executing the computer program stored in the memory.

16. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for calculating the amount of inorganic microgel used in carbonate oil reservoirs according to any one of claims 1 to 13 is implemented.

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