CN113931620A - Method and device for calculating gas suction index model of gas injection development oil reservoir and storage medium - Google Patents
Method and device for calculating gas suction index model of gas injection development oil reservoir and storage medium Download PDFInfo
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Abstract
The invention provides a method, a device and a storage medium for calculating an air suction index model of a gas injection development oil reservoir, wherein the method comprises the following steps: acquiring a binomial gas injection capability equation of the gas injection well; establishing an air suction index model of a preset reservoir according to a binomial air injection capability equation of the air injection well; and guiding reservoir gas injection development according to the gas suction index model. According to the scheme, the oil reservoir gas injection development is carried out according to the gas suction index model, so that the error between the gas suction index of the reservoir and the actual application is reduced, the gas suction index model of the reservoir meets the oil reservoir gas injection development requirement, and the cost is further saved.
Description
Technical Field
The invention relates to the technical field of oil deposit gas injection development, in particular to a method and a device for calculating a gas suction index model of a gas injection development oil deposit and a storage medium.
Background
Gas injection flooding is an effective method for improving the recovery ratio of crude oil; the evaluation result of the air suction capacity of the reservoir serves as an important basis for scientific decisions such as the gas injection and injection allocation amount of the oil reservoir, the design of the number of injection and production wells and the like, and a mature evaluation method is lacking at present.
In the prior art, generally based on an oil reservoir engineering method, a reservoir water absorption index is calculated and then converted into reservoir gas absorption capacity, and the reservoir gas absorption capacity can be represented by a reservoir gas absorption index model.
However, in the method for converting the water absorption index into the air absorption capacity of the reservoir in the prior art, the difference between the viscosity and the flow capacity of the injected gas and the injected water is not considered, and the Darcy's law is not satisfied; therefore, the reservoir gas suction index error obtained by the method in practical application is large, and the oil reservoir gas injection development requirement cannot be met.
Disclosure of Invention
The invention provides a method, a device and a storage medium for calculating a gas suction index model of a gas injection development oil reservoir, which are used for solving the problems that the gas suction index error of the reservoir obtained in the prior art is large and the gas injection development requirement of the oil reservoir cannot be met.
In one aspect, the present invention provides a method for calculating a gas injection development reservoir gas absorption index model, comprising:
acquiring a binomial gas injection capability equation of the gas injection well;
establishing an air suction index model of the preset reservoir according to the binomial air injection capability equation of the air injection well;
and guiding reservoir gas injection development according to the inspiration index model.
Optionally, before the guiding the reservoir gas injection development according to the inspiration index model, the method further includes:
verifying the accuracy of the inspiration index model;
the guiding reservoir gas injection development according to the inspiration index model comprises the following steps:
and when the inspiration index model is accurate, guiding reservoir gas injection development according to the inspiration index model.
Optionally, after the creating the inspiration index model of the preset reservoir, the method further includes:
determining the flow coefficient and the flow parameter of the preset reservoir according to the inspiration index model;
calculating the flow coefficient according to the formula:
calculating the flow parameter according to the following formula:
wherein A is the flow coefficient, B is the flow parameter, T is the formation temperature of the preset reservoir, K is the low-layer permeability of the preset reservoir, S is the skin factor of the preset reservoir, Z is the deviation factor of the injected gas, mu is the viscosity of the injected gas, gammagIs the relative density of the preset reservoir, h is the stratum thickness of the preset reservoir, rwIs the borehole radius of the predetermined reservoir, reThe supply radius or gas injection well control radius of the preset reservoir is obtained;
simplifying the inspiration index model of the preset reservoir according to the flow coefficient and the flow parameters of the preset reservoir to obtain a target inspiration index model;
the gas injection development of the oil reservoir according to the inspiration index model comprises the following steps:
and performing gas injection development on the oil reservoir according to the target inspiration index model.
Optionally, the target inspiration index model is:
wherein, JgIs the target inspiratory index model, A is the flow coefficient, B is the flow parameter, prIs the formation pressure, p, of the predetermined reservoirwfThe bottom hole flowing pressure of the preset reservoir, qgDaily insufflation.
Optionally, the verifying the accuracy of the inspiration index model comprises:
injecting nitrogen into the preset reservoir and acquiring the flow pressure of the measuring points under different systems;
calculating the bottom hole flowing pressure according to the bottom hole depth and the middle depth of the preset reservoir;
predicting the gas injection pressure of a wellhead for actually injecting natural gas according to the parameters of the injected nitrogen and the bottom-hole flowing pressure, and verifying the actual gas injection pressure according to the wellhead pressure;
determining a natural gas actual gas suction indication curve according to the oil pressure of a well head and daily gas injection quantity;
and calculating the inspiration index of the preset reservoir according to the actual inspiration indication curve, and verifying whether the inspiration index model is accurate or not according to the inspiration index.
Optionally, the parameters of the injected nitrogen include: nitrogen oil pressure, nitrogen gas column pressure, pit shaft friction pressure when injecting nitrogen gas, nitrogen gas density and nitrogen gas molecular weight, according to the parameter of injecting nitrogen gas with bottom hole flowing pressure, the gas injection pressure of the well head of the natural gas of actual injection is predicted, include:
calculating the gas injection pressure of the wellhead actually injected with natural gas according to the following formula:
pwf＝p11+p12-p1f＝p21+p22-p2f；
wherein p iswfFor said bottom hole flow pressure, p11For said nitrogen gas oil pressure, p12Is the pressure of the nitrogen gas column, p1fFor wellbore friction pressure, p, during nitrogen injection1Is nitrogen density, M1Is the molecular weight of nitrogen, p21Is natural gas oil pressure, p22Is the pressure of the natural gas column, p2fFor wellbore friction pressure, p, during natural gas injection2Is the density of natural gas, M2Is the natural gas molecular weight and alpha is the conversion coefficient.
Optionally, the injecting nitrogen into the preset reservoir and obtaining bottom hole flowing pressure under different regimes includes:
carrying out amplification gas injection to form a continuous gas phase near the shaft;
and injecting nitrogen in sequence according to a boosting method at a plurality of different discharge capacities, and measuring by using a downhole pressure gauge to obtain the bottom hole flowing pressure at the different discharge capacities.
In a second aspect, the present invention provides an apparatus comprising: the device comprises an acquisition module, a processing module and a determination module, wherein:
the acquisition module is used for acquiring a binomial gas injection capability equation of the gas injection well;
the processing module is used for establishing an air suction index model of the preset reservoir according to the binomial air injection capability equation of the air injection well;
and the determining module is used for guiding the reservoir gas injection development according to the inspiration index model.
In a third aspect, the present invention provides an electronic device, comprising: comprising a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the apparatus to perform the gas injection development reservoir method of any of the preceding first aspects.
In a fourth aspect, the present invention provides a computer readable storage medium having stored therein computer executable instructions that, when executed, cause a computer to perform a gas injection development reservoir method as described in any one of the preceding first aspects.
The invention provides a method, a device and a storage medium for calculating an air suction index model of a gas injection development oil reservoir, wherein the method comprises the following steps: acquiring a binomial gas injection capability equation of the gas injection well; establishing an air suction index model of a preset reservoir according to a binomial air injection capability equation of the air injection well; and guiding reservoir gas injection development according to the gas suction index model. According to the scheme, the oil reservoir gas injection development is carried out according to the gas suction index model, so that the error between the gas suction index of the reservoir and the actual application is reduced, the gas suction index model of the reservoir meets the oil reservoir gas injection development requirement, and the cost is further saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic flow chart of a method for calculating a gas suction index model of a gas injection development reservoir according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another method for calculating a gas injection development reservoir gas suction index model according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a gas injection indication curve derived based on data of nitrogen injection;
FIG. 4 is a graph illustrating a relationship between daily gas injection amount and oil pressure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a summation of underflow pressure variance-gas injection quantity difference quotient and gas injection quantity curve provided by an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the prior art, an oil reservoir engineer generally performs conversion evaluation on the air suction capacity of a reservoir by calculating the water absorption index of the reservoir based on an oil reservoir engineering method; however, in practical application, the injected gas has lower viscosity and stronger fluidity compared with the injected water, and does not satisfy Darcy's law, so that the reservoir gas suction index obtained by the method has larger error, and the reservoir gas suction index model obtained by the reservoir engineering method does not satisfy the reservoir gas injection development requirement.
In view of the above problems, the present invention provides a method for calculating a gas injection exploitation reservoir gas absorption index model, which aims to solve the above technical problems in the prior art.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for calculating a gas injection development oil reservoir gas suction index model, which is applied to electronic equipment, wherein the electronic equipment can be a computer, a notebook computer, a tablet computer, a Personal Digital Assistant (PDA) and the like, and as shown in figure 1, the method comprises the following steps:
101, acquiring a binomial gas injection capability equation of the gas injection well.
In the embodiment of the invention, the gas injection capacity of the gas injection well or the gas suction capacity of the gas injection well refers to the gas suction of the stratum under a certain gas injection pressure difference. The gas injection well gas injection capacity equation describes the equation for the formation gas uptake capacity.
Optionally, in the process of deriving the inspiration index model of the preset reservoir, the preset reservoir is assumed to satisfy the following conditions: the stratum is horizontally uniform in thickness and homogeneous; the gas injection well is positioned in the center of the stratum; the injected gas flows isothermally and the gas injection quantity is stable; fourthly, the injected gas is quasi-stable seepage. And determining the gas flow of the gas injection well under the standard state according to the isothermal compression coefficient of the gas. The standard state is a state of the substance at a predetermined standard pressure p, and is referred to as a standard state for short, and generally refers to a temperature T of 100 kPa. And then obtaining a binomial gas injection capacity equation of the gas injection well by calculation, wherein the binomial gas injection capacity equation is as the following formula (1):
pwf 2-pw 2＝Aqg+Bqg 2 (1)；
wherein A is the flow coefficient, B is the flow parameter, pwfFor bottom hole flow pressure, pwIs the formation flow pressure, qgDaily insufflation.
And 102, establishing an air suction index model of a preset reservoir according to an air injection capacity equation of the air injection well.
In the embodiment of the invention, the electronic equipment establishes the gas suction index model of the preset reservoir according to the acquired gas injection capacity equation of the gas injection well and the definition of the gas suction index model. However, the quasi-steady state pressure is changed continuously, so that the quasi-pressure is difficult to determine, therefore, the quasi-steady state pressure can be used for representing the average quasi-pressure of the actual gas volume in the control volume of the gas injection well, and meanwhile, the skin coefficient is added, so that an inspiration index model of a preset reservoir stratum is established, wherein the quasi-steady state means that the pressure of each point in the oil reservoir is in a linear relation with time.
The inspiration index model is as follows equation (2):
wherein, JgFor presetting the inspiratory index, p, of the reservoirrIs the formation pressure, p, of the reservoirwfThe bottom hole flowing pressure of a reservoir stratum, T the stratum temperature of a preset reservoir stratum, K the low-layer permeability of the preset reservoir stratum, mu the viscosity of the injected gas, Z the deviation factor of the injected gas, h the stratum thickness of the preset reservoir stratum, reFor presetting the supply radius of the reservoir or the control radius of the gas injection well, rwWellbore radius for a predetermined reservoir, S skin factor for a predetermined reservoir, γgRelative density, q, for a predetermined reservoirgDaily insufflation.
And 103, guiding oil reservoir gas injection development according to the gas suction index model.
In the embodiment of the invention, an oil reservoir engineer can apply the gas absorption index model of the preset reservoir established according to the flow coefficient and the flow parameters to the actual oil reservoir for gas injection development to guide a gas injection oil displacement technology, thereby improving the crude oil recovery ratio.
According to the method for calculating the gas suction index model of the gas injection development oil reservoir, the flow coefficient and the flow parameter of the preset reservoir are obtained, the gas suction index model of the preset reservoir is established according to the flow coefficient and the flow parameter, and the gas injection development is carried out on the oil reservoir according to the gas suction index model. In other words, according to the scheme of the invention, the flow coefficient and the flow parameter of the preset reservoir are obtained, and then the inspiration index model of the preset reservoir is established, compared with the inspiration index model obtained by converting the reservoir water absorption index to obtain the reservoir in the prior art, the error between the reservoir inspiration index and the practical application is reduced, so that the reservoir inspiration index model meets the oil reservoir gas injection development requirement, and the cost is saved.
Based on the foregoing embodiment, a second embodiment of the present invention provides a method for calculating a gas injection exploitation reservoir gas suction index model, which is shown in fig. 2 and includes the following steps:
The implementation of steps 201 and 202 may refer to the related description of steps 101 and 102 in the first embodiment, and will not be described here again.
And step 203, determining the flow coefficient and the flow parameter of the preset reservoir according to the inspiration index model.
The flow coefficient in this embodiment refers to a flow coefficient of oil in a preset reservoir, and the flow parameter refers to a flow parameter of oil in the preset reservoir. Before the electronic equipment acquires the flow coefficient and the flow parameters of the preset reservoir, according to the theory of seepage mechanics, the difference between fluid injection and fluid production is that the seepage directions are different, but the mathematical models describing the seepage characteristics are consistent, so that the gas injection capacity equation of the gas injection well can be appropriately transformed, and the equation describing the gas suction capacity of the preset reservoir during gas injection, namely the gas suction index model of the preset reservoir, is obtained.
The electronic equipment obtains the parameters of the preset reservoir, and obtains the flow coefficient and the flow parameters according to the parameters of the preset reservoir. Wherein, the presetting of the parameters of the reservoir may include: formation pressure, bottom hole flow pressure, formation temperature, and injected gas viscosity; injection gas deviation factor, formation permeability, formation thickness, feed radius or gas injection well control radius, wellbore radius, skin factor, relative density, and daily gas injection quantity parameters.
For example, the flow coefficient may be calculated by the following equation (3), and the flow parameter may be calculated by the following equation (4).
Wherein A is the flow coefficient and B is the flow parameter.
And 204, simplifying the inspiration index model of the preset reservoir according to the flow coefficient and the flow parameters of the preset reservoir to obtain a target inspiration index model.
In the oil deposit gas injection development process, the preset gas suction index of a reservoir is an important basis for scientific decisions such as injection allocation amount, injection and production well number and the like. And the electronic equipment calculates a target inspiration index model according to the flow coefficient and the flow parameter of the preset reservoir. Illustratively, the target inspiration index model of the preset reservoir is as shown in equation (5) below:
wherein, JgIs a target inspiratory index model, A is the flow coefficient, B is the flow parameter, prFor presetting the formation pressure of the reservoir, pwfFor presetting the bottom hole flow pressure of the reservoir, qgDaily insufflation.
Illustratively, table 1 is a data table of parameters of a predetermined reservoir and parameters of injected natural gas, and as shown in table 1 below, the data of the parameters of the injected natural gas are substituted into formula (3) and formula (4), resulting in a flow coefficient a of 0.02102145 and a flow parameter B of 7.04361 × 10-8。
TABLE 1 data of parameters of a predetermined reservoir and injected natural gas parameters
Optionally, a target inspiration index model of the preset reservoir may be calculated by combining the data in table 1 and table 2, where table 2 is the gas injection well flowing pressure test data, and table 2 is shown below, where the formation pressure p of the preset reservoir isrThe values of the formation middle pressure in Table 2, the daily gas injection quantity q, are takengThe daily average gas injection quantity in Table 2 was taken, and the data in tables 1 and 2 were substituted into equation (5) to find the gas absorption index of the preset reservoir to be 1.84X 104m3/(d.MPa). It should be noted that, in this embodiment, only the test data of the gas injection well at a certain time is used for verification.
TABLE 2 gas injection well flowing pressure test data
And step 205, verifying the accuracy of the target inspiration index model.
In the embodiment of the invention, before the gas injection development of the oil reservoir is carried out according to the target gas absorption index model, the accuracy of the target gas absorption index model needs to be verified, so that the accurate gas absorption index model is used for carrying out gas injection development on the oil reservoir, the gas injection amount can be effectively reduced, and the cost is saved.
For example, whether the inspiration index model is accurate may be verified by the following method, which may include the following steps:
and step 205a, injecting nitrogen into a preset reservoir and acquiring measuring point flow pressure under different systems.
In the embodiment of the invention, the measuring point flowing pressure refers to the pressure of different measuring points during the production of an oil well and a gas well; because the nitrogen gas is filled into the oil well, the pressure in the well can be improved, the oil production amount is increased, and the filled nitrogen gas can also be used as a cushion pad in the measurement of the drill rod, so that the possibility that the lower test tube column is squeezed by the pressure of the mud in the well is completely avoided. Therefore, in the embodiment of the invention, in order to verify the accuracy of the established reservoir gas suction capacity model, a method of injecting nitrogen on site is adopted. The nitrogen injection test comprises the following two stages: amplifying gas injection and system well testing, wherein the purpose of the amplifying gas injection stage is to form a continuous gas phase near a shaft; the system well testing stage is used for recording the bottom hole flowing pressure under different discharge capacities.
Optionally, in the nitrogen injection test experiment, the well testing specific method is to monitor the bottom hole flowing pressure in real time by using an underground pressure gauge under different injection discharge capacities; the well testing refers to testing an oil-gas well to obtain corresponding stratum parameters. For example, according to the boosting method, the voltage is 1200m3/h、2000m3/h、2800m3/h、3600m3And (4) performing test injection on the discharge capacity per hour, and recording the bottom hole flowing pressure under different systems. The electronic equipment receives the nitrogen test injection report data, thereby obtaining the data under different systemsBottom hole flow pressure.
And step 205b, calculating the bottom hole flowing pressure according to the bottom hole depth and the middle depth of the preset reservoir.
In the embodiment of the invention, in the nitrogen test injection experiment, the bottom hole flowing pressure is calculated according to the bottom hole depth and the middle depth of the reservoir, and a relation between the nitrogen test injection and the flowing pressure of the middle depth is shown in a table 3.
TABLE 3 nitrogen test injection reckoning chart
And step 205c, predicting the gas injection pressure of the wellhead actually injected with the natural gas according to the parameters of the injected nitrogen and the bottom hole flowing pressure, and verifying the actual gas injection pressure according to the wellhead pressure.
In the embodiment of the present invention, in the nitrogen injection test, the electronic device obtains an actual natural gas injection apparent inspiration indicating curve calculated by actual nitrogen injection data, as shown in fig. 3, where the parameter data of the injected nitrogen obtained by the electronic device includes: nitrogen oil pressure, nitrogen gas column pressure, wellbore friction pressure during nitrogen injection, nitrogen density and nitrogen molecular weight; according to the fact that the bottom hole pressure of a gas column flowing in a shaft is equal to the sum of the gas injection pressure of a well head and the gas column pressure, and then the friction resistance is subtracted; therefore, the gas injection pressure of the well head for injecting the natural gas can be predicted based on the data of the pilot injection nitrogen, and then the gas injection pressure formula (8) of the well head for actually injecting the natural gas is obtained by deduction according to the formula (6) and the formula (7) as follows:
pwf＝p11+p12-p1f＝p21+p22-p2f (6)
wherein p iswfFor bottom hole flow pressure, p11Is nitrogen gas oil pressure, p12Is the pressure of the nitrogen gas column, p1fFor wellbore friction pressure, p, during nitrogen injection1Is nitrogen density, M1Is the molecular weight of nitrogen, p21Is natural gas oil pressure, p22Is the pressure of the natural gas column, p2fFor wellbore friction pressure, p, during natural gas injection2Is the density of natural gas, M2Is the natural gas molecular weight and alpha is the conversion coefficient.
Optionally, the electronic device obtains data of actually injected natural gas, and may obtain a gas injection pressure result table of a wellhead actually injected with natural gas, as shown in table 4 below, a report of nitrogen injection test for a gas injection well.
Table 4 gas injection well test nitrogen report
From the above table, it can be seen that the wellhead pressure is close to the actual gas injection pressure, and here, the wellhead pressure and the actual gas injection pressure are considered to be the same as the actual gas injection pressure result if the difference between the wellhead pressure and the actual gas injection pressure does not exceed the threshold; wherein the threshold is 8.
And step 205d, determining a natural gas actual gas suction indication curve according to the oil pressure of the well head and the daily gas injection amount.
In the embodiment of the invention, the daily gas injection amount refers to the amount of nitrogen injected into the well every day in an experiment; the wellhead oil pressure refers to the residual pressure of the oil gas after the oil gas is lifted to the wellhead from the bottom of the well through an oil pipe by flowing pressure; after the electronic equipment acquires the accurate calculated actual natural gas injection wellhead oil pressure, a natural gas actual gas suction indicating curve can be drawn according to the acquired wellhead oil pressure and daily gas injection quantity data, and the relationship curve of the daily gas injection quantity and the oil pressure is shown in a figure 3; further, the electronic device may perform linear fitting on the curve in fig. 3 to obtain a linear equation (9), where the specific linear equation (9) is as follows:
y＝0.5401x+380796 (9)
wherein y is the gas injection pressure and x is the daily gas injection amount.
And step 205e, calculating the inspiration index of the preset reservoir according to the real inspiration indication curve, and verifying whether the inspiration index model is accurate or not according to the inspiration index.
In the embodiment of the invention, the curve fitting accuracy 0.9935 can be obtained from fig. 4, which is close to 1 and has high fitting accuracy; keeping constant in a period of time according to the reservoir formation pressure, so that the data of each test point meets the reservoir gas suction capacity model, subtracting the reservoir gas suction capacity models from each other, and further sorting to obtain a relational expression for calculating the flow coefficient A and the flow parameter B, as shown in the following formula (10),
wherein p iswfiThe bottom hole flowing pressure of the test point M is used; p is a radical ofwfi-1The bottom hole flowing pressure is a test point N; q. q.sgiGas injection quantity is measured for test point M day; q. q.sgi-1Injecting gas for the test point N days; a is the flow coefficient; b is a flow parameter; here, M and N are different test points.
It can be seen from the above equation (10) that a linear equation is formed between the flow coefficient a and the flow parameter B, and the measured data of the injection well is processed according to equation (11), such as the curve shown in fig. 5, where the formula of the curve is as follows equation (11), the intercept of the curve is 0.021, and the slope of the curve is 7 × 10-8It can be seen that the intercept and slope calculated from the actual test data, and the flow coefficient A calculated from the inspiratory index model as 0.02102145 and the flow parameter B as 7.04361 × 10-8Substantially the same so that the accuracy of the inspiration index model can be determined. It should be noted that, in the embodiment of the present invention, errors are allowed, and all the errors are all usable experimental data with an error of 0.008 or less.
Optionally, the electronic device performs linear fitting on the acquired gas injection well measured data to obtain a result as shown in fig. 5, where the linear fitting result is as follows in formula (11):
m＝0.021-7×10-8n (11)
wherein n is the sum of gas injection amount, and m is the ratio of the bottom hole flow pressure-leveling variance to the difference value of the gas injection amount.
Alternatively, further, substituting the data in Table 3 into equation (4) may result in a reservoir inspiration index of 1.84 × 104m3V (d.MPa), reservoir gas absorption index is 1.85 x 10 according to reciprocal of slope of visual gas absorption indication curve fitting expression4m3And (d.MPa), the gas storage layer inspiration index model is the same as the actual reservoir layer inspiration index, so that the theoretical calculation accuracy of the reservoir layer inspiration index model is verified.
And step 206, when the inspiration index model is accurate, guiding the oil reservoir gas injection development according to the inspiration index model.
In the implementation of the invention, if the electronic equipment verifies that the air suction index model is invalid according to the nitrogen injection test, further, the electronic equipment corrects the flow coefficient and the flow parameter in the air suction index model according to the parameters obtained by the actual nitrogen injection test to obtain a corrected air suction index model, and verifies the corrected air suction index model; the verification process of the corrected inspiration index model is the same as the verification process of the inspiration index model, and the difference is only that the parameters in the inspiration index model are changed.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
The invention provides a method for calculating a gas suction index model of a gas injection development oil reservoir, which comprises the following steps: acquiring a binomial gas injection capability equation of the gas injection well; establishing an air suction index model of a preset reservoir according to a binomial air injection capability equation of the air injection well; and guiding reservoir gas injection development according to the gas suction index model. According to the scheme, the oil reservoir gas injection development is carried out according to the gas suction index model, so that the error between the gas suction index of the reservoir and the practical application is reduced, the gas suction index model of the reservoir meets the oil reservoir gas injection development requirement, and the cost is further saved to a certain extent.
Based on the foregoing embodiments, an embodiment of the present invention provides an apparatus for calculating a gas injection exploitation reservoir gas suction index model, and referring to fig. 6, an apparatus 3 provided in this embodiment includes: an obtaining module 31, a processing module 32, and a determining module 33, wherein:
the acquiring module 31 is used for acquiring a binomial gas injection capability equation of the gas injection well;
the processing module 32 is used for establishing an air suction index model of a preset reservoir according to a binomial air injection capability equation of the air injection well;
and the determining module 33 is used for guiding reservoir gas injection development according to the gas suction index model.
In other embodiments, the apparatus 3 further comprises a verification module, wherein:
the verification module is used for verifying the accuracy of the inspiration index model;
and the determining module 32 is specifically used for guiding reservoir gas injection development according to the inspiration index model when the inspiration index model is accurate.
In other embodiments, the processing module 32 in the apparatus 3 is further configured to determine a flow coefficient and a flow parameter of the preset reservoir according to the inspiration index model;
the flow coefficient was calculated according to the following formula:
the flow parameters were calculated according to the following formula:
wherein A is a flow coefficient, B is a flow parameter, T is a formation temperature of a preset reservoir, K is a low-layer permeability of the preset reservoir, S is a skin factor of the preset reservoir, Z is an injected gas deviation factor, mu is an injected gas viscosity, and gamma is a pressure coefficientgIs the relative density of the preset reservoir, h is the stratum thickness of the preset reservoir, rwTo preset the borehole radius of the reservoir, reTo presetThe supply radius of the reservoir or gas injection well control radius;
simplifying an inspiration index model of a preset reservoir according to the flow coefficient and the flow parameters of the preset reservoir to obtain a target inspiration index model;
performing gas injection development on the oil reservoir according to the suction index model, wherein the gas injection development comprises the following steps:
and performing gas injection development on the oil reservoir according to the target gas suction index model.
In other embodiments, the apparatus 3 further comprises a calculation module and a verification module, wherein:
the processing module is also used for injecting nitrogen into the preset reservoir and acquiring the flow pressure of the measuring points under different systems;
the calculation module is used for calculating the bottom hole flowing pressure according to the bottom hole depth and the middle depth of a preset reservoir;
the verification module is used for predicting the gas injection pressure of a wellhead actually injected with natural gas according to the parameters of the injected nitrogen and the bottom-hole flowing pressure, and verifying the actual gas injection pressure according to the wellhead pressure;
the determining module 33 is further configured to determine a natural gas actual gas suction indication curve according to the wellhead oil pressure and the daily gas injection amount;
the determining module 33 is further configured to calculate an inspiration index of the preset reservoir according to the real inspiration indication curve, and verify whether the inspiration index model is accurate according to the inspiration index.
In other embodiments, the calculation module in the apparatus 3 is further configured to calculate a gas injection pressure of a wellhead that actually injects the natural gas according to the following formula:
pwf＝p11+p12-p1f＝p21+p22-p2f；
wherein p iswfFor bottom hole flow pressure, p11Is nitrogen gas oil pressure, p12Is the pressure of the nitrogen gas column, p1fFor wellbore friction pressure, p, during nitrogen injection1Is nitrogen density, M1Is the molecular weight of nitrogen, p21Is natural gas oil pressure, p22Is the pressure of the natural gas column, p2fFor wellbore friction pressure, p, during natural gas injection2Is the density of natural gas, M2Is the natural gas molecular weight and alpha is the conversion coefficient.
In other embodiments, the apparatus 3 further comprises a test module, wherein:
the testing module is used for carrying out amplification gas injection and forming a continuous gas phase near a shaft;
and the processing module 32 is further used for sequentially injecting nitrogen at a plurality of different discharge capacities according to a pressure boosting method, and measuring the bottom hole flowing pressure at different discharge capacities through the downhole pressure gauge.
The apparatus of the foregoing embodiment may be configured to implement the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
The electronic device 4 provided by the embodiment of the present invention, where the electronic device 4 may be applied to the method for calculating gas injection development reservoir gas suction index model provided by the embodiment shown in fig. 1 or fig. 2, and referring to fig. 7, the electronic device 4 may include: a processor 41, a memory 42, a transceiver 43, and a communication bus 44, wherein:
the memory 42 is used for storing instructions of a method for calculating a gas injection development reservoir gas suction index model; the transceiver 43 is used for communication with other devices; the processor 41 is configured to execute instructions stored in the memory 42 to cause the electronic device to perform the method of calculating gas injection development reservoir gas induction index model as described in the embodiments of fig. 1 or fig. 2 above.
Based on the foregoing embodiments, embodiments of the invention provide a computer storage medium storing computer instructions that, when executed, cause a computer to perform a method of calculating a gas injection development reservoir gas induction index model as in the embodiments of fig. 1 or fig. 2 described above.
The computer-readable storage medium may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a magnetic Random Access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); and may be various electronic devices such as mobile phones, computers, tablet devices, personal digital assistants, etc., including one or any combination of the above-mentioned memories.
It should be noted that, in the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of calculating a gas injection development reservoir gas induction index model, the method comprising:
acquiring a binomial gas injection capability equation of the gas injection well;
establishing an air suction index model of the preset reservoir according to the binomial air injection capability equation of the air injection well;
and guiding reservoir gas injection development according to the inspiration index model.
2. The method of claim 1, prior to said directing reservoir gas injection development according to the inspiration index model, further comprising:
verifying the accuracy of the inspiration index model;
the guiding reservoir gas injection development according to the inspiration index model comprises the following steps:
and when the inspiration index model is accurate, guiding reservoir gas injection development according to the inspiration index model.
3. The method of claim 1, wherein after establishing the inspiratory index model of the predetermined reservoir, further comprising:
determining the flow coefficient and the flow parameter of the preset reservoir according to the inspiration index model;
calculating the flow coefficient according to the formula:
calculating the flow parameter according to the following formula:
wherein A is the flow coefficient, B is the flow parameter, T is the formation temperature of the preset reservoir, K is the low-layer permeability of the preset reservoir, S is the skin factor of the preset reservoir, Z is the deviation factor of the injected gas, mu is the viscosity of the injected gas, gammagIs the relative density of the preset reservoir, h is the stratum thickness of the preset reservoir, rwIs the borehole radius of the predetermined reservoir, reThe supply radius or gas injection well control radius of the preset reservoir is obtained;
simplifying the inspiration index model of the preset reservoir according to the flow coefficient and the flow parameters of the preset reservoir to obtain a target inspiration index model;
the gas injection development of the oil reservoir according to the inspiration index model comprises the following steps:
and performing gas injection development on the oil reservoir according to the target inspiration index model.
4. The method of claim 3, wherein the target inspiration index model is:
Jgis the target inspiratory index model, A is the flow coefficient, B is the flow parameter, prIs the formation pressure, p, of the predetermined reservoirwfThe bottom hole flowing pressure of the preset reservoir, qgDaily insufflation.
5. The method of claim 2, wherein the verifying the inspiratory index model accuracy comprises:
injecting nitrogen into the preset reservoir and acquiring the flow pressure of the measuring points under different systems;
calculating bottom hole flowing pressure according to the bottom hole depth and the middle depth of the preset reservoir;
predicting the gas injection pressure of a wellhead for actually injecting natural gas according to the parameters of the injected nitrogen and the bottom-hole flowing pressure, and verifying the actual gas injection pressure according to the wellhead pressure;
determining a natural gas actual gas suction indication curve according to the oil pressure of a well head and daily gas injection quantity;
and calculating the inspiration index of the preset reservoir according to the actual inspiration indication curve, and verifying whether the inspiration index model is accurate or not according to the inspiration index.
6. The method of claim 5, wherein the parameters of the injected nitrogen gas comprise: nitrogen oil pressure, nitrogen gas column pressure, pit shaft friction pressure when injecting nitrogen gas, nitrogen gas density and nitrogen gas molecular weight, according to the parameter of injecting nitrogen gas with bottom hole flowing pressure, the gas injection pressure of the well head of the natural gas of actual injection is predicted, include:
calculating the gas injection pressure of the wellhead actually injected with natural gas according to the following formula:
pwf＝p11+p12-p1f＝p21+p22-p2f；
wherein p iswfFor bottom hole flow pressure, p11Is nitrogen gas oil pressure, p12Is the pressure of the nitrogen gas column, p1fFor wellbore friction pressure, p, during nitrogen injection1Is nitrogen density, M1Is the molecular weight of nitrogen, p21Is natural gas oil pressure, p22Is the pressure of the natural gas column, p2fFor wellbore friction pressure, p, during natural gas injection2Is the density of natural gas, M2Is the natural gas molecular weight and alpha is the conversion coefficient.
7. The method as claimed in claim 5, wherein the injecting nitrogen into the preset reservoir and obtaining bottom hole flow pressure under different schedules comprises:
carrying out amplification gas injection to form a continuous gas phase near the shaft;
and injecting nitrogen in sequence according to a boosting method at a plurality of different discharge capacities, and measuring by using a downhole pressure gauge to obtain the bottom hole flowing pressure at the different discharge capacities.
8. An apparatus for calculating a gas injection development reservoir gas induction index model, the apparatus comprising: the device comprises an acquisition module, a processing module and a determination module, wherein:
the acquisition module is used for acquiring a binomial gas injection capability equation of the gas injection well;
the processing module is used for establishing an air suction index model of the preset reservoir according to the binomial air injection capability equation of the air injection well;
and the determining module is used for guiding the reservoir gas injection development according to the inspiration index model.
9. An electronic device, characterized in that the electronic device comprises: a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor being configured to execute the instructions stored in the memory to cause the devices to perform the method of calculating a gas injection development reservoir suction index model of any of claims 1 to 7.
10. A computer readable storage medium having stored therein computer executable instructions which, when executed, cause a computer to perform the method of calculating a gas injection development reservoir gas suction index model of any of claims 1 to 7.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110264373A1 (en) * | 2010-04-26 | 2011-10-27 | Hehmeyer Owen J | Method For The Management of Oilfields Undergoing Solvent Injection |
| CN104481473A (en) * | 2014-11-17 | 2015-04-01 | 中国石油天然气股份有限公司 | Gas drive reservoir injection and recovery method and device |
| CN106370260A (en) * | 2016-08-16 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for measuring lost gas content in test of gas content of shale |
| CN106761638A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | The fireflood of high dip angle heavy crude reservoir is driven with flue gas re-injection gravity and cooperates with recovery method |
| CN107463761A (en) * | 2016-06-02 | 2017-12-12 | 中国石油天然气股份有限公司 | gas storage gas injection well control dynamic evaluation method |
| CN111322056A (en) * | 2020-03-02 | 2020-06-23 | 中国石油大学(北京) | Continental facies shale gas development well type determination method and device |
-
2020
- 2020-07-13 CN CN202010670184.8A patent/CN113931620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110264373A1 (en) * | 2010-04-26 | 2011-10-27 | Hehmeyer Owen J | Method For The Management of Oilfields Undergoing Solvent Injection |
| CN104481473A (en) * | 2014-11-17 | 2015-04-01 | 中国石油天然气股份有限公司 | Gas drive reservoir injection and recovery method and device |
| CN107463761A (en) * | 2016-06-02 | 2017-12-12 | 中国石油天然气股份有限公司 | gas storage gas injection well control dynamic evaluation method |
| CN106370260A (en) * | 2016-08-16 | 2017-02-01 | 中国石油天然气股份有限公司 | Method for measuring lost gas content in test of gas content of shale |
| CN106761638A (en) * | 2016-12-15 | 2017-05-31 | 中国石油天然气股份有限公司 | The fireflood of high dip angle heavy crude reservoir is driven with flue gas re-injection gravity and cooperates with recovery method |
| CN111322056A (en) * | 2020-03-02 | 2020-06-23 | 中国石油大学(北京) | Continental facies shale gas development well type determination method and device |
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