Mineralization calculation method, device and equipment based on pumped fluid conductivity

Abstract

The present invention discloses a method, device and equipment for calculating the mineralization based on the conductivity of a pumped fluid, and relates to the field of oil well exploration, wherein the method comprises: obtaining the conductivity of a simulated formation fluid under different influencing factors, and establishing a conductivity map; analyzing the influence of different influencing factors on the conductivity according to the conductivity map, and fitting a conversion formula between mineralization and conductivity; and using the conversion formula to calculate the mineralization of the pumped fluid obtained in real time during the cable formation test pump sampling process. The present invention uses the conversion formula between mineralization and conductivity to obtain the mineralization of the pumped fluid in real time, thereby obtaining the purity of the pumped fluid in real time, achieving effective judgment of the fluid properties of the pumped fluid, and thereby effectively avoiding the occurrence of misjudgment of the reservoir fluid properties. The scheme can be well applied to the exploration drilling and completion, logging, testing and other stages, and effectively guide the on-site sampling operation.

Description

Technical Field

[0001] The invention relates to the field of oil well exploration, and in particular to a method, a device and equipment for calculating salinity based on the electrical conductivity of a pumped fluid. Background Art

[0002] In the process of oil well exploration, cable formation sampling technology is an important means of identifying reservoir fluid properties. However, in the application process, due to the influence of factors such as drilling fluid invasion, the original formation fluid is contaminated, so how to identify the properties of downhole fluid in real time is particularly important. However, in the existing cable formation test pump sampling process, it is impossible to effectively identify the fluid properties of the pumped fluid, which is more likely to cause misjudgment of reservoir fluid properties. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a method, device and apparatus for calculating salinity based on the conductivity of a pumped fluid, which overcome the above problems or at least partially solve the above problems.

[0004] According to one aspect of an embodiment of the present application, a method for calculating salinity based on the conductivity of a pumped fluid is provided, the method comprising:

[0005] Obtain the conductivity of simulated formation fluid under different influencing factors and establish a conductivity chart;

[0006] According to the conductivity chart, the influence of different factors on conductivity is analyzed, and the conversion formula between mineralization and conductivity is obtained by fitting.

[0007] The conversion formula is used to calculate the mineralization of the pumped fluid obtained in real time during the wireline formation test pump sampling process.

[0008] Further, different influencing factors include: temperature, pressure and concentration.

[0009] Furthermore, obtaining the conductivity of the simulated formation fluid under different influencing factors and establishing the conductivity map further includes:

[0010] NaCl solutions of different concentrations are prepared as simulated formation fluids of different concentrations;

[0011] Measuring the conductivity of simulated formation fluids of different concentrations at different temperatures and pressures;

[0012] A conductivity chart is established based on the conductivity of simulated formation fluids of different concentrations at different temperatures and pressures.

[0013] Furthermore, according to the conductivity chart, the influence of different influencing factors on conductivity is analyzed, and the conversion formula between mineralization and conductivity obtained by fitting further includes:

[0014] According to the conductivity chart, analyze the relationship between the conductivity of the simulated formation fluid and the temperature, pressure and concentration;

[0015] According to the change relationship, an initial fitting formula between the mineralization and the conductivity at different temperatures is constructed; wherein the initial fitting formula contains a plurality of equation parameters having a corresponding relationship with the temperature;

[0016] The initial fitting formula is used to perform curve fitting to obtain the fitting values ​​of each equation parameter at different temperatures;

[0017] According to the fitting values ​​of the parameters of each equation at different temperatures, the relationship between the parameters of each equation and the temperature is obtained by fitting;

[0018] Substituting the relationship between each equation parameter and temperature into the initial fitting formula, the conversion formula between mineralization and conductivity was obtained.

[0019] Furthermore, the initial fitting formula between salinity and conductivity at different temperatures is:

[0020] C = a + b · exp (k · σ);

[0021] Among them, C represents mineralization; σ represents electrical conductivity; a, b and k represent equation parameters and have a corresponding relationship with temperature.

[0022] Furthermore, the relationship between each equation parameter and temperature is:

[0023] a=0.21·T-108.86;

[0024] b = 108.63-0.21·T;

[0025] k=0.07+0.0003·exp(0.023·T);

[0026] Where a, b and k represent equation parameters; T represents temperature.

[0027] According to another aspect of an embodiment of the present application, a device for calculating salinity based on the conductivity of a pumped fluid is provided, the device comprising:

[0028] A chart establishment module is suitable for obtaining the conductivity of simulated formation fluid under different influencing factors and establishing a conductivity chart;

[0029] The analysis and fitting module is suitable for analyzing the influence of different influencing factors on conductivity based on the conductivity chart, and fitting the conversion formula between mineralization and conductivity;

[0030] The calculation module is suitable for calculating the mineralization of the pumped fluid obtained in real time during the cable formation test pump sampling process by using the conversion formula.

[0031] According to another aspect of the embodiment of the present application, there is provided a computing device, including: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0032] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute operations corresponding to the above-mentioned method for calculating the mineralization based on the conductivity of the pumped fluid.

[0033] According to another aspect of the embodiment of the present application, a computer storage medium is provided, in which at least one executable instruction is stored, and the executable instruction enables a processor to perform operations corresponding to the above-mentioned method for calculating the mineralization based on the conductivity of the pumped fluid.

[0034] According to another aspect of the embodiments of the present application, a computer program product is provided, comprising at least one executable instruction, wherein the executable instruction enables a processor to execute operations corresponding to the above-mentioned method for calculating the mineralization based on the conductivity of the pumped fluid.

[0035] According to the technical solution provided by the present invention, the conductivity of the simulated formation fluid under different influencing factors is obtained, and a conductivity map is established; based on the conductivity map, the influence of different influencing factors on the conductivity is fully analyzed, and the conversion formula between the salinity and the conductivity is fitted, and the correlation between the salinity and the conductivity can be effectively and intuitively reflected through the conversion formula; in the process of cable formation test pump sampling, the conductivity of the pumped fluid can be measured in real time, then according to the conductivity of the pumped fluid measured in real time in the process of cable formation test pump sampling, and using the conversion formula between the salinity and the conductivity, it can It is possible to obtain the mineralization of the pumped fluid in real time, and thus the purity of the pumped fluid in real time, thereby achieving effective judgment of the fluid properties of the pumped fluid, and thereby effectively avoiding the misjudgment of the reservoir fluid properties. This solution can be well applied to exploration drilling and completion, logging, testing and other stages, and can effectively guide on-site sampling operations. In addition, the mineralization calculation function provided by the present application can also be added to the cable formation testing instrument, further expanding and enriching the functions of the cable formation testing instrument, increasing its practicality, and being able to well meet the diverse logging needs of users, thereby helping to increase the market share of the cable formation testing instrument.

[0036] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic flow chart of a method for calculating salinity based on the conductivity of a pumped fluid according to an embodiment of the present application is shown;

[0039] Figure 2 shows a schematic diagram of the conductivity plate;

[0040] Figure 3 A structural block diagram of a device for calculating salinity based on the conductivity of a pumped fluid according to an embodiment of the present application is shown;

[0041] Figure 4 A schematic diagram of the structure of a computing device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] Figure 1 FIG. 1 is a flow chart of a method for calculating the salinity based on the conductivity of a pumped fluid according to an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0044] Step S101, obtaining the conductivity of the simulated formation fluid under different influencing factors and establishing a conductivity map.

[0045] This application is aimed at cable formation testing instruments and combines them with on-site water analysis technology to establish a mineralization calculation method based on the electrical conductivity of the pumped fluid. It can calculate the mineralization of the pumped fluid in real time and accurately, thereby achieving effective judgment of the fluid properties of the pumped fluid, thereby effectively avoiding the misjudgment of the reservoir fluid properties.

[0046] During the cable formation test pump sampling process, the conductivity of the pumped fluid can be monitored in real time. The main factors affecting the conductivity of the formation fluid include temperature, pressure (i.e., pressure per unit area) and salinity. Studies have found that the effect of temperature on conductivity is relatively complex, and its influence is related to the concentration of the solution; in a dilute salt solution, the conductivity is almost unaffected by temperature; in a concentrated salt solution, the conductivity increases with increasing temperature; when the pressure is higher than normal pressure and lower than 200MPa, the pressure change has little effect on the conductivity; the salinity is generally expressed by the total amount of various salts (or equivalent NaCl) contained in 1L of water, in mg / L or g / L; the conductivity is directly proportional to the ion concentration, and the conductivity will increase accordingly as the ion concentration increases.

[0047] In order to achieve the purpose of accurately calculating the mineralization of the actual formation fluid, in this application, for the mixed system of water-based mud filtrate and formation water, NaCl solution is used as a simulated formation fluid, and the conductivity of the simulated formation fluid under different influencing factors is obtained through measurement, and then a conductivity chart is established. Among them, the different influencing factors include: temperature, pressure and concentration.

[0048] Specifically, NaCl solutions of different concentrations are prepared as simulated formation fluids of different concentrations; then the conductivity of the simulated formation fluids of different concentrations at different temperatures and pressures is measured; and then a conductivity chart is established based on the conductivity of the simulated formation fluids of different concentrations at different temperatures and pressures.

[0049] For example, the conductivity of NaCl solutions with a concentration of 2 to 300 g / L at 25 to 175° C. and 0.4 to 1 MPa was measured experimentally, and the results are shown in Table 1.

[0050] Table 1 Conductivity of NaCl solutions with different concentrations at different temperatures and pressures

[0051]

[0052] Considering that when the pressure is higher than normal pressure and lower than 200 MPa, the pressure change has little effect on the conductivity, in this application, a conductivity chart can be formed based on the relationship between the conductivity of the NaCl solution and the temperature and concentration, such as Figure 2 In oilfield exploration, a chart is a series of charts, graphs, and technical means used to analyze and interpret seismic data, geological data, and other related data. Charts play an important role in petroleum geology and geophysics, helping people better understand and interpret underground structures and reservoir characteristics.

[0053] Step S102: Analyze the influence of different influencing factors on the conductivity based on the conductivity chart, and obtain the conversion formula between mineralization and conductivity by fitting.

[0054] Among them, according to the conductivity plate, the relationship between the conductivity of the simulated formation fluid and the temperature, pressure and concentration is analyzed; according to the change relationship, the initial fitting formula between the mineralization and the conductivity at different temperatures is constructed; wherein, the initial fitting formula contains multiple equation parameters that have a corresponding relationship with the temperature; the initial fitting formula is used to perform curve fitting to obtain the fitting values ​​of each equation parameter at different temperatures; according to the fitting values ​​of each equation parameter at different temperatures, the relationship between each equation parameter and the temperature is fitted; the relationship between each equation parameter and the temperature is substituted into the initial fitting formula to obtain the conversion formula between mineralization and conductivity.

[0055] In order to calculate the salinity of NaCl solution, the salinity can be expressed as a function of temperature and conductivity: salinity = f (temperature, conductivity). According to the conductivity chart, the salinity and conductivity at different temperatures show a consistent exponential relationship. The initial fitting formula between the salinity and conductivity at different temperatures can be:

[0056] C = a + b · exp (k · σ);

[0057] Wherein, C represents mineralization, the unit is g / L; σ represents conductivity, the unit is S / m; a, b and k represent equation parameters, the unit of a is g / L, the unit of b is g / L, the unit of k is m / S; a, b and k have a corresponding relationship with temperature.

[0058] By fitting the mineralization and conductivity curves at different temperatures, the fitting values ​​of the equation parameters a, b, and k at the corresponding temperatures can be obtained, as shown in Table 2.

[0059] Table 2 Fitting values ​​of equation parameters a, b, k at different temperatures

[0060]

[0061] According to the corresponding relationship between each equation parameter and temperature shown in Table 2, the relationship between each equation parameter a, b, k and temperature can be fitted respectively:

[0062] a=0.21·T-108.86;

[0063] b = 108.63-0.21·T;

[0064] k=0.07+0.0003·exp(0.023·T);

[0065] Wherein, a, b and k represent equation parameters; T represents temperature. It is understood that in the process of calculating the corresponding relationship between each equation parameter and temperature, only the numerical value is considered, and no unit is substituted in the calculation.

[0066] After fitting the relationship between each equation parameter and temperature, the relationship between each equation parameter and temperature is substituted into the initial fitting formula, thereby conveniently obtaining the conversion formula between mineralization and conductivity.

[0067] In order to verify the reliability of the conversion formula between mineralization and conductivity, in this application, the conductivity of the NaCl solution measured at different temperatures in Table 2 is substituted into the conversion formula to calculate the corresponding mineralization, which is compared with the experimental value of the mineralization. The results are shown in Tables 3 and 4.

[0068] Table 3 Comparison of calculated and experimental values ​​of NaCl solution mineralization

[0069]

[0070] Table 4 Comparison of relative deviations between calculated and experimental values ​​of NaCl solution mineralization

[0071]

[0072] The conversion formula between mineralization and conductivity was fitted using the above formulas. The maximum relative deviation between the calculated values ​​and experimental values ​​of 63 groups of mineralization obtained using this conversion formula was 8.74%, the minimum relative deviation was 0.06%, and the average relative deviation was 2.84%. Among them, there were 50 groups of data points with a relative deviation of less than 5%, accounting for 79.4%. In general, the conversion formula between mineralization and conductivity is highly reliable and can achieve the purpose of accurately calculating the mineralization of actual formation fluids.

[0073] Step S103, using the conversion formula, calculates the mineralization of the pumped fluid obtained in real time during the cable formation test pump sampling process.

[0074] In the process of cable formation test pump sampling, the conductivity of the pumped fluid can be measured in real time. Then, according to the conductivity of the pumped fluid measured in real time during the cable formation test pump sampling, and using the conversion formula between salinity and conductivity, the salinity of the pumped fluid can be obtained in real time. Specifically, the parameter values ​​of the parameters of each equation corresponding to the temperature can be determined according to the temperature, and then the conductivity of the pumped fluid measured in real time is substituted into the conversion formula, and the salinity of the pumped fluid (actual formation fluid) is calculated using the conversion formula. According to the present application, the salinity of the pumped fluid can be obtained in real time during the cable formation test pump sampling, so as to obtain the purity of the pumped fluid in real time, effectively guiding the on-site sampling operation; the salinity calculation function provided by the present application can also be added to the cable formation test instrument, further expanding and enriching the functions of the cable formation test instrument, increasing practicality, meeting the diverse logging needs of users, and helping to increase the market share of the cable formation test instrument.

[0075] According to the mineralization calculation method based on the conductivity of the pumped fluid provided in the embodiment of the present application, the conductivity of the simulated formation fluid under different influencing factors is obtained, and a conductivity map is established; based on the conductivity map, the influence of different influencing factors on the conductivity is fully analyzed, and the conversion formula between mineralization and conductivity is fitted, and the correlation between mineralization and conductivity can be effectively and intuitively reflected through the conversion formula; in the process of cable formation test pump sampling, the conductivity of the pumped fluid can be measured in real time, then according to the conductivity of the pumped fluid measured in real time in the process of cable formation test pump sampling, and using the relationship between mineralization and conductivity The conversion formula between can obtain the mineralization of the pumped fluid in real time, and thus obtain the purity of the pumped fluid in real time, thereby realizing the effective judgment of the fluid properties of the pumped fluid, and thus effectively avoiding the misjudgment of the reservoir fluid properties. This solution can be well applied to the exploration drilling and completion, logging, testing and other stages, and effectively guide the on-site sampling operations; in addition, the mineralization calculation function provided by the present application can also be added to the cable formation testing instrument, further expanding and enriching the functions of the cable formation testing instrument, increasing its practicality, and being able to well meet the diverse logging needs of users, which is helpful to increase the market share of the cable formation testing instrument.

[0076] Figure 3 FIG. 4 shows a structural block diagram of a device for calculating salinity based on the conductivity of a pumped fluid according to an embodiment of the present application. Figure 3 As shown, the device includes: a plate creation module 310, an analysis and fitting module 320 and a calculation module 330.

[0077] The map creation module 310 is adapted to obtain the conductivity of the simulated formation fluid under different influencing factors and create a conductivity map.

[0078] The analysis and fitting module 320 is adapted to: analyze the influence of different influencing factors on the conductivity according to the conductivity chart, and obtain the conversion formula between the mineralization and the conductivity by fitting.

[0079] The calculation module 330 is adapted to calculate the mineralization of the pumped fluid obtained in real time during the wireline formation test pump sampling process using a conversion formula.

[0080] Optionally, different influencing factors include: temperature, pressure and concentration.

[0081] Optionally, the map creation module 310 is further suitable for: preparing NaCl solutions of different concentrations as simulated formation fluids of different concentrations; measuring the conductivity of simulated formation fluids of different concentrations at different temperatures and different pressures; and establishing a conductivity map based on the conductivity of simulated formation fluids of different concentrations at different temperatures and different pressures.

[0082] Optionally, the analysis and fitting module 320 is further suitable for: analyzing the changing relationship between the conductivity of the simulated formation fluid and the temperature, pressure and concentration based on the conductivity plate; constructing an initial fitting formula between the mineralization and the conductivity at different temperatures based on the changing relationship; wherein the initial fitting formula contains a plurality of equation parameters having a corresponding relationship with the temperature; performing curve fitting using the initial fitting formula to obtain the fitting values ​​of each equation parameter at different temperatures; fitting the relationship between each equation parameter and the temperature based on the fitting values ​​of each equation parameter at different temperatures; substituting the relationship between each equation parameter and the temperature into the initial fitting formula to obtain the conversion formula between the mineralization and the conductivity.

[0083] Optionally, the initial fitting formula between salinity and conductivity at different temperatures is:

[0084] C = a + b · exp (k · σ);

[0085] Among them, C represents mineralization; σ represents electrical conductivity; a, b and k represent equation parameters and have a corresponding relationship with temperature.

[0086] Optionally, the relationship between each equation parameter and temperature is:

[0087] a=0.21·T-108.86;

[0088] b = 108.63-0.21·T;

[0089] k=0.07+0.0003·exp(0.023·T);

[0090] Where a, b and k represent equation parameters; T represents temperature.

[0091] According to the mineralization calculation device based on the conductivity of the pumped fluid provided in the embodiment of the present application, the conductivity of the simulated formation fluid under different influencing factors is obtained, and a conductivity map is established; based on the conductivity map, the influence of different influencing factors on the conductivity is fully analyzed, and the conversion formula between mineralization and conductivity is fitted, and the correlation between mineralization and conductivity can be effectively and intuitively reflected through the conversion formula; in the process of cable formation test pump sampling, the conductivity of the pumped fluid can be measured in real time, then according to the conductivity of the pumped fluid measured in real time in the process of cable formation test pump sampling, and using the relationship between mineralization and conductivity The conversion formula between can obtain the mineralization of the pumped fluid in real time, and thus obtain the purity of the pumped fluid in real time, thereby realizing the effective judgment of the fluid properties of the pumped fluid, and thus effectively avoiding the misjudgment of the reservoir fluid properties. This solution can be well applied to the exploration drilling and completion, logging, testing and other stages, and effectively guide the on-site sampling operations; in addition, the mineralization calculation function provided by the present application can also be added to the cable formation testing instrument, further expanding and enriching the functions of the cable formation testing instrument, increasing its practicality, and being able to well meet the diverse logging needs of users, which is helpful to increase the market share of the cable formation testing instrument.

[0092] The present invention also provides a non-volatile computer storage medium, which stores at least one executable instruction, and the executable instruction can execute the mineralization calculation method based on the conductivity of the pumped fluid in any of the above method embodiments.

[0093] An embodiment of the present invention provides a computer program product, which includes at least one executable instruction or computer program, which can enable a processor to perform operations corresponding to the method for calculating the mineralization based on the conductivity of the pumped fluid in any of the above method embodiments.

[0094] Figure 4 A schematic diagram of the structure of a computing device according to an embodiment of the present application is shown. The specific embodiment of the present application does not limit the specific implementation of the computing device.

[0095] like Figure 4 As shown, the computing device may include: a processor 402 , a communication interface 404 , a memory 406 , and a communication bus 408 .

[0096] The processor 402, the communication interface 404, and the memory 406 communicate with each other via the communication bus 408. The communication interface 404 is used to communicate with other devices such as a client or other server network elements. The processor 402 is used to execute the program 410, which can specifically execute the relevant steps in the above-mentioned embodiment of the method for calculating the mineralization degree based on the conductivity of the pumped fluid for the computing device.

[0097] Specifically, the program 410 may include program codes, which include computer operation instructions.

[0098] The processor 402 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the computing device may be processors of the same type, such as one or more CPUs; or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0099] The memory 406 is used to store the program 410. The memory 406 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0100] Program 410 can be specifically used to enable processor 402 to execute the method for calculating the salinity based on the conductivity of the pumped fluid in any of the above-mentioned method embodiments. The specific implementation of each step in program 410 can refer to the corresponding descriptions in the corresponding steps and units in the above-mentioned embodiment for calculating the salinity based on the conductivity of the pumped fluid, which will not be repeated here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-mentioned equipment and modules can refer to the corresponding process description in the above-mentioned method embodiment, which will not be repeated here.

[0101] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing such systems. In addition, the present invention is not directed to any specific programming language either. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description of the above specific languages ​​is for disclosing the best mode of the present invention.

[0102] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0103] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0104] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device so disclosed may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0105] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0106] The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the embodiments of the present invention. The present invention may also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0107] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A method for calculating the mineralization of a pumped fluid based on its conductivity, characterized in that: The method comprises: Obtaining the conductivity of the simulated formation fluid under different influencing factors and establishing a conductivity chart; wherein the different influencing factors include: temperature, pressure and concentration; According to the conductivity chart, the influence of different influencing factors on the conductivity is analyzed, and a conversion formula between mineralization and conductivity is obtained by fitting; Using the conversion formula, the mineralization of the pumped fluid obtained in real time during the cable formation test pump sampling process is calculated; Wherein, the analysis of the influence of different influencing factors on the conductivity based on the conductivity plate and the fitting of the conversion formula between mineralization and conductivity further include: Analyzing the relationship between the conductivity of the simulated formation fluid and the temperature, pressure and concentration according to the conductivity chart; According to the change relationship, an initial fitting formula between the mineralization and the conductivity at different temperatures is constructed; wherein the initial fitting formula includes a plurality of equation parameters having a corresponding relationship with the temperature; Performing curve fitting using the initial fitting formula to obtain fitting values ​​of various equation parameters at different temperatures; According to the fitting values ​​of the parameters of each equation at different temperatures, the relationship between the parameters of each equation and the temperature is obtained by fitting; Substitute the relationship between each equation parameter and temperature into the initial fitting formula to obtain the conversion formula between mineralization and conductivity.

2. The method for calculating salinity based on the conductivity of pumped fluid according to claim 1, characterized in that: The obtaining of the conductivity of the simulated formation fluid under different influencing factors and establishing the conductivity chart further comprises: NaCl solutions of different concentrations are prepared as simulated formation fluids of different concentrations; Measuring the conductivity of simulated formation fluids of different concentrations at different temperatures and pressures; The conductivity map is established based on the conductivity of simulated formation fluids of different concentrations at different temperatures and different pressures.

3. The method for calculating salinity based on the conductivity of pumped fluid according to claim 1, characterized in that: The initial fitting formula between salinity and conductivity at different temperatures is: C = a + b · exp (k · σ); Among them, C represents mineralization; σ represents electrical conductivity; a, b and k represent equation parameters and have a corresponding relationship with temperature.

4. The method for calculating salinity based on the conductivity of pumped fluid according to claim 3, characterized in that: The relationship between each equation parameter and temperature is: a=0.21·T-108.86; b = 108.63-0.21·T; k=0.07+0.0003·exp(0.023·T); Where a, b and k represent equation parameters; T represents temperature.

5. A device for calculating the mineralization degree based on the conductivity of a pumped fluid, characterized in that: The device comprises: A chart establishment module is adapted to obtain the conductivity of the simulated formation fluid under different influencing factors and establish a conductivity chart; wherein the different influencing factors include: temperature, pressure and concentration; An analysis and fitting module, adapted to analyze the influence of different influencing factors on the conductivity according to the conductivity chart, and to obtain a conversion formula between mineralization and conductivity by fitting; A calculation module, adapted to calculate the mineralization of the pumped fluid obtained in real time during the cable formation test pump sampling process using the conversion formula; Wherein, the analysis and fitting module is further adapted to: Analyzing the relationship between the conductivity of the simulated formation fluid and the temperature, pressure and concentration according to the conductivity chart; According to the change relationship, an initial fitting formula between the mineralization and the conductivity at different temperatures is constructed; wherein the initial fitting formula includes a plurality of equation parameters having a corresponding relationship with the temperature; Performing curve fitting using the initial fitting formula to obtain fitting values ​​of various equation parameters at different temperatures; According to the fitting values ​​of the parameters of each equation at different temperatures, the relationship between the parameters of each equation and the temperature is obtained by fitting; Substitute the relationship between each equation parameter and temperature into the initial fitting formula to obtain the conversion formula between mineralization and conductivity.

6. A computing device, characterized in that include: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the method for calculating the mineralization based on the conductivity of the pumped fluid as described in any one of claims 1 to 4.

7. A computer storage medium, characterized in that: The computer storage medium stores at least one executable instruction, and the executable instruction enables the processor to execute operations corresponding to the method for calculating the mineralization based on the conductivity of the pumped fluid as described in any one of claims 1 to 4.

8. A computer program product, characterized in that The method comprises at least one executable instruction, wherein the executable instruction enables a processor to execute operations corresponding to the method for calculating the salinity based on the conductivity of the pumped fluid as claimed in any one of claims 1 to 4.

Images