CN203299170U - Three-dimensional dynamic detection device for phase states of fluid in porous medium under oil deposit conditions - Google Patents

Abstract

The utility model discloses a three-dimensional dynamic detection device for fluid phase state in porous media under oil reservoir conditions, comprising: an array of ultrasonic probes arranged on the surface of a physical model for three-dimensional dynamic detection of fluid phase state in porous media under oil reservoir conditions. Under the control of the servo system, it reciprocates at a uniform speed along the surface of the physical model to detect the acoustic parameters of the fluid phase state in the porous medium under the reservoir condition; the servo system is connected with the ultrasonic probe array to control the The array of ultrasonic probes reciprocates at a uniform speed along the surface of the physical model to detect the acoustic parameters of the fluid phase state in porous media under reservoir conditions. The embodiment of the utility model has the advantages of good directivity, low price, harmless to the human body, suitable for large-scale models under high temperature and high pressure, and will help to improve the applicability of ultrasonic technology in physical simulation of oil reservoirs and improve the accuracy of detection performance, real-time, intuition and reliability of test results.

Description

Three-dimensional dynamic detection device for fluid phase state in porous media under reservoir conditions

technical field

The utility model relates to the technical field of oil reservoir physical simulation in the petroleum industry, in particular to a three-dimensional dynamic detection device for fluid phase state in porous media under oil reservoir conditions.

Background technique

Ultrasonic technology has the advantages of no radiation, economical and practical, and is suitable for large-scale model detection under high temperature and high pressure conditions. It is currently used in nondestructive testing and other fields. Since sound waves can penetrate opaque objects such as porous media, acoustic information such as the internal structure or fluid saturation of these objects can be obtained by using sound waves, and then the acoustic information can be inverted or reconstructed into images visible to the human eye, thereby obtaining porous media Parameter information such as the internal structure or fluid saturation degree of the internal object or model and its distribution law. Through the organic combination of ultrasonic technology and reservoir physical simulation methods, it is possible to carry out traditional reservoir physical parameter measurement and various displacement experimental studies, and to reverse the model structure and fluid distribution within the microscopic scale range in porous media. It has strong practical application value.

However, whether it is pure ultrasonic technology or traditional reservoir physical simulation technology, the balance and matching between the two have always been the focus of academic circles. Practice has also proved that due to the technical characteristics of reservoir physical simulation of high temperature and high pressure, the model detection requires a temperature-resistant and pressure-resistant carrier, but the existence of different acoustic impedance carriers will inevitably increase the difficulty of ultrasonic penetration. Therefore, the popularization and application of this technology are severely restricted.

Utility model content

The embodiment of the utility model provides a three-dimensional dynamic detection device for fluid phase in porous media under oil reservoir conditions, which is used to achieve fast detection, convenient operation, economical safety, and large-scale model detection of fluid phase in porous media under high temperature and high pressure conditions. For the purpose of state three-dimensional dynamic detection, the device includes:

The array of ultrasonic probes is arranged on the surface of the physical model of the three-dimensional dynamic detection of the fluid phase state in the porous medium under the condition of the reservoir. Acoustic parameter detection of fluid phase state in medium;

A servo system, connected to the ultrasonic probe array, is used to control the uniform reciprocating movement of the ultrasonic probe array along the surface of the physical model, so as to detect the acoustic parameters of the fluid phase state in the porous medium under the reservoir condition.

In one embodiment, the ultrasonic probe array is arranged on the surface of the physical model in a linear or circumferential manner.

In one embodiment, the frequency, size and quantity of the ultrasonic probe array are determined according to the size, characteristics, temperature and pressure conditions and accuracy requirements of the porous medium.

In one embodiment, the frequency of the ultrasonic probe array is within the frequency range of 20KHz to 2MHz.

In one embodiment, the above-mentioned device also includes:

An inversion and reconstruction system, connected to the ultrasonic probe array, is used to obtain the acoustic parameters detected by the ultrasonic probe array, and according to the relationship between the acoustic parameters and the fluid phase parameters in the porous medium, perform Inversion and reconstruction of phase parameters.

Compared with ray CT imaging technology, nuclear magnetic resonance imaging technology, etc., the embodiment of the utility model has the advantages of good directivity, low price, harmless to human body, suitable for large-scale models under high temperature and high pressure, and the like. With the development of electronic technology and computer technology, the application of ultrasonic detection technology will help to improve its physical simulation in reservoirs through the array arrangement of ultrasonic probes, combined with signal analysis and processing, digital imaging and acoustic time diffraction and other technologies. It improves the accuracy, real-time, intuitiveness and reliability of detection results, promotes the development of reservoir physical simulation experiments to microscopic scales such as porous media, and avoids simply studying the phase relationship of oil, gas, and water systems. , ignoring the disadvantages of the influence of porous media on its phase characteristics.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work. In the attached picture:

Fig. 1 is a schematic structural view of a three-dimensional dynamic detection device for a fluid phase state in a porous medium under reservoir conditions in an embodiment of the utility model;

Fig. 2 is a schematic diagram of a specific example of a three-dimensional dynamic detection device for a fluid phase state in a porous medium under reservoir conditions in an embodiment of the utility model;

Fig. 3 is a flowchart of a three-dimensional dynamic detection method for fluid phase state in porous media under reservoir conditions in an embodiment of the utility model;

Fig. 4 is a schematic diagram of a displacement experiment in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiment of the utility model clearer, the embodiment of the utility model will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiment of the utility model and its description are used to explain the utility model, but not as a limitation to the utility model.

In order to solve the problem of three-dimensional dynamic detection of fluid phases such as oil, gas and water in porous media under reservoir conditions, the embodiment of the utility model provides a low-cost, safe and practical detection device using ultrasonic technology.

Fig. 1 is a schematic structural diagram of a three-dimensional dynamic detection device for fluid phase state in porous media under reservoir conditions in an embodiment of the utility model. As shown in Figure 1, the three-dimensional dynamic detection device for the phase state of the fluid in the porous medium under the reservoir conditions in the embodiment of the utility model may include:

The ultrasonic probe array 101 is arranged on the surface of the physical model for three-dimensional dynamic detection of the fluid phase state in the porous medium under the reservoir condition, and is used to reciprocate at a uniform speed along the surface of the physical model under the control of the servo system 102 to monitor the reservoir condition. Acoustic parameter detection of fluid phase state in porous media;

The servo system 102 is connected with the ultrasonic probe array 101, and is used to control the ultrasonic probe array 101 to reciprocate at a uniform speed along the surface of the physical model, so as to detect the acoustic parameters of the fluid phase state in the porous medium under the reservoir conditions .

In a specific implementation, the ultrasonic probe array 101 may be arranged on the surface of the physical model in a linear or circumferential manner.

During specific implementation, the frequency, size and quantity of the ultrasonic probe array 101 can be determined according to the size, characteristics, temperature and pressure conditions and accuracy requirements of the porous medium.

During specific implementation, the frequency of the ultrasonic probe array may be within the frequency range of 20KHz to 2MHz.

Fig. 2 is a schematic diagram of a specific example of a three-dimensional dynamic detection device for a fluid phase state in a porous medium under reservoir conditions in an embodiment of the utility model. As shown in Figure 2, during specific implementation, the three-dimensional dynamic detection device for fluid phase state in porous media under the reservoir conditions may also include:

The inversion and reconstruction system 201 is connected to the ultrasonic probe array 101, and is used to obtain the acoustic parameters detected by the ultrasonic probe array 101, and perform Inversion and reconstruction of phase parameters in porous media.

Fig. 3 is the detection implementation flowchart of the three-dimensional dynamic detection device of the fluid phase state in the porous medium under the reservoir condition in the embodiment of the utility model, as shown in Fig. 3, the fluid phase in the porous medium under the reservoir condition in the utility model embodiment State three-dimensional dynamic detection methods may include:

Step 301, arranging an array of ultrasonic probes on the surface of a physical model for three-dimensional dynamic detection of fluid phase state in porous media under reservoir conditions;

Step 302 , the ultrasonic probe array reciprocates at a uniform speed along the surface of the physical model under the control of the servo system to detect the acoustic parameters of the fluid phase state in the porous medium under reservoir conditions.

During specific implementation, the porous media under the reservoir conditions include but are not limited to porous media such as natural cores, artificial cores, and sand-packing models. Fluids include but not limited to oil, gas, water and other fluids.

During specific implementation, the array of ultrasonic probes may be arranged on the surface of the physical model in a circular manner, or the array of ultrasonic probes may be arranged linearly on the surface of the physical model.

During specific implementation, the frequency, size and quantity of the ultrasonic probe array can be determined according to the size, characteristics, temperature and pressure conditions and accuracy requirements of the porous medium. For example, it may be determined that the frequency of the ultrasonic probe array is within a frequency range of 20 KHz to 2 MHz.

In order to perform acoustic parameter detection more quickly, the ultrasonic probe array can adopt the method of one transmission and multiple reception, and sequential transmission, so as to complete the detection of the acoustic parameters of the surface of the physical model within a unit time. For example, by arranging arrays of ultrasonic probes around the surface of the physical model, one shot, multiple receptions and sequential launches can be performed to complete the detection of a certain section of the model per unit time. At the same time, the probe array is driven by the servo system along the surface of the model. Uniform reciprocating motion to realize three-dimensional dynamic detection of oil, gas and water system phase state in porous media under reservoir conditions.

During specific implementation, in the three-dimensional dynamic detection of the fluid phase state in the porous medium under the reservoir conditions, the acoustic parameters of the ultrasonic probe array detection can also be obtained by the inversion and reconstruction system, and according to the acoustic parameters and the internal state of the porous medium The relationship between fluid phase parameters, inversion and reconstruction of phase parameters in porous media.

Specifically, the relationship between the acoustic parameters and the phase state parameters of the fluid in the porous medium can be determined through a calibration experiment. Displacement experiments or phase state experiments (Pressure-Volume-Temperature, PVT) can be carried out. Through the acoustic parameters, the inversion and reconstruction of phase state parameters in porous media can be carried out by using ray theory, wave theory and image processing methods. Figure 4 is a schematic diagram of the displacement experiment. In implementation, dialysis imaging methods based on ray theory include but not limited to inversion methods such as transformation reconstruction method and technology expansion method, and reconstruction algorithms include but not limited to ray tracing, iterative reconstruction and other reconstruction algorithms. The ultrasonic inversion image is easily affected by noise in the process of acquisition, transmission and storage, and the ultrasonic inversion image can be processed by image segmentation.

To give an example, in the implementation of the three-dimensional dynamic detection of the fluid phase state in the porous medium under the reservoir conditions in the embodiment of the utility model, the appropriate probe frequency, size and quantity can be selected according to the characteristics, accuracy requirements and temperature and pressure conditions of the porous medium to be measured , and ensure the matching relationship between the ultrasonic probe array and the physical model. On the basis of good calibration, the three-dimensional dynamic ultrasonic detection of the phase state of oil, gas, and water in porous media under reservoir conditions is carried out. Through the measured acoustic parameters and the porous media The relationship between the internal fluid phase states, using ray theory, wave theory and image processing methods to invert and reconstruct the internal phase state parameters of porous media. Among them, the frequency range of the ultrasonic probe array is generally 20KHz to 2MHz; the relationship between the ultrasonic acoustic parameters and the phase state parameters of the fluid in the porous medium can be determined through calibration experiments, and then the displacement experiment or phase state experiment is carried out. Parameters, using ray theory, wave theory and image processing methods for inversion and reconstruction of phase parameters in porous media. During the detection process, the servo system controls the ultrasonic probe array to reciprocate at a uniform speed on the surface of the physical model, and completes the detection of the acoustic parameters of the physical model in the axial direction per unit time.

In summary, the embodiment of the utility model is suitable for the detection and inversion of phase state parameters of saturated fluid porous media under high temperature and high pressure conditions in physical simulation experiments such as oil and gas field development, such as fluid saturation distribution. Probes are arrayed to perform one-shot, multiple-receive, and sequential emission. Using the relationship between ultrasonic acoustic parameters, such as sound velocity, attenuation or frequency, and the phase state of the fluid in porous media, the tomographic imaging method based on ray theory and wave theory can detect Inversion and reconstruction of fluid phase parameters in porous media. The embodiment of the utility model has fast detection, convenient operation, economical safety, can realize the detection of large-scale models under high temperature and high pressure conditions, and is beneficial to the research and application of phase state characteristics and laws in the microscopic field of saturated fluid porous media in physical simulation experiments.

The embodiment of the utility model is suitable for use in the process of testing the phase state parameters of the fluid in the porous medium under the condition of the oil reservoir. Good, low price, harmless to the human body, suitable for large-scale models under high temperature and high pressure, etc. With the development of electronic technology and computer technology, the application of ultrasonic detection technology will help to improve its performance in oil reservoirs through surrounding or linear arrangement of ultrasonic probes, combined with signal analysis and processing, digital imaging and acoustic time diffraction and other technologies. The applicability in physical simulation improves the accuracy, real-time, intuitiveness and reliability of detection results, promotes the development of reservoir physical simulation experiments to microscopic scales such as porous media, and avoids the simple study of oil, gas, and water systems. The disadvantages of ignoring the influence of porous media on its phase characteristics.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to the flowcharts and/or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (4)

1. A three-dimensional dynamic detection device for fluid phase state in porous media under reservoir conditions, characterized in that it comprises: The array of ultrasonic probes is arranged on the surface of the physical model of the three-dimensional dynamic detection of the fluid phase state in the porous medium under the condition of the reservoir. Acoustic parameter detection of fluid phase state in medium; A servo system, connected to the ultrasonic probe array, is used to control the uniform reciprocating movement of the ultrasonic probe array along the surface of the physical model, so as to detect the acoustic parameters of the fluid phase state in the porous medium under the reservoir condition. the 2 . The three-dimensional dynamic detection device for fluid phase state in porous media under reservoir conditions according to claim 1 , wherein the array of ultrasonic probes is linearly or encirclingly arranged on the surface of the physical model. 3 . the 3. the fluid phase state three-dimensional dynamic detection device in the porous medium under the oil reservoir condition as claimed in claim 1, is characterized in that, the frequency, size and quantity of described ultrasonic probe group array, are according to the size of porous medium, characteristic, The temperature and pressure conditions and accuracy requirements are determined. the 4. The three-dimensional dynamic detection device for fluid phase state in porous media under oil reservoir conditions according to claim 1, characterized in that, the frequency of the ultrasonic probe array is within the frequency range of 20KHz to 2MHz. the

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