Temperature control type gas-bearing stratum simulation and acoustic parameter monitoring device

Abstract

The invention relates to a temperature control type gas-bearing stratum simulation and acoustic parameter monitoring device. The temperature control type gas-bearing stratum simulation and acoustic parameter monitoring device comprises a gas preparation module, a gas conveying module, a soil acoustic parameter detection module and a data acquisition and processing module, the soil body acoustic parameter detection module comprises a reaction kettle used for providing an experimental soil body accommodating space and a condensation box used for regulating and controlling the experimental temperature environment of the reaction kettle; the gas preparation module, the gas conveying module and the reaction kettle are connected through a pipeline, and the gas preparation module is used for preparing gas for simulating a gas-containing stratum, conveying the gas through the gas conveying module and adjusting a gas pressure environment of an experiment; the data acquisition and processing module comprises an acoustic parameter acquisition device and a computer processing system; the acoustic parameter acquisition device is connected with the reaction kettle and is used for acquiring acoustic parameter data after the experimental temperature environment and the gas pressure environment of the reaction kettle meet preset requirements; and the computer processing system is used for processing and analyzing the acquired acoustic parameter data.

Description

Technical Field

[0001] The present invention relates to the technical field of finished oil and gas exploration and development, and particularly to a temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device. Background Art

[0002] During the process of oil and gas exploration and development, a method for identifying the geological risks of shallow gas is required. Shallow gas specifically refers to hydrocarbon gas accumulations occurring in continental strata, polar permafrost zones, etc., with a burial depth of less than 500 meters. Due to the characteristics of abnormal pressure and irregular spatial distribution in this gas reservoir, it is prone to engineering disasters such as blowouts and formation collapses during drilling operations, posing a serious threat to the safety of conventional oil and gas resource exploration and development operations.

[0003] In the prior art, there are reports on analyzing shallow gas formations by establishing physical models. However, the existing physical models have limited reduction of actual geological conditions, high construction and maintenance costs. Moreover, it is difficult to adjust and control different geological environments, with a long experimental period, and it is difficult to conduct multiple repeated experiments to verify the stability of the results, which cannot meet the needs of oil and gas production. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide a temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device, which can simulate different temperatures or soil parameters in the same device, facilitating the simulation of test conditions required for gas-bearing formations. Moreover, based on this experimental device, the acoustic parameters of the gas-bearing formation are collected, saving time and effort, and being simple and efficient.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: In the first aspect, the present application provides a temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device, including: a gas preparation module, a gas transportation module, a soil acoustic parameter detection module, and a data acquisition and processing module; wherein: The soil acoustic parameter detection module includes: a reaction kettle for providing an experimental soil accommodation space for simulating a gas-bearing formation, and a condensation box for regulating the experimental temperature environment of the reaction kettle; The gas preparation module, the gas transportation module, and the reaction kettle are sequentially connected through pipelines. The gas preparation module is used to prepare the gas for simulating the gas-bearing formation, transport the gas through the gas transportation module, and adjust the gas pressure environment of the experiment; The data acquisition and processing module includes: an acoustic parameter acquisition device and a computer processing system; the acoustic parameter acquisition device is connected to the reaction kettle and is used to collect acoustic parameter data after the experimental temperature environment and gas pressure environment of the reaction kettle reach the preset requirements; the computer processing system is used to process and analyze the collected acoustic parameter data.

[0006] In one implementation, the reactor adopts a structure of nested inner and outer double-layer boxes; among them, the inner box is used to accommodate the experimental soil body; the space between the inner box and the outer box is used for the circulation of the condensate of the condenser box.

[0007] In one implementation, the reactor includes: the outer box is composed of the left side, the front, the right side and the back of the reactor, which are connected in sequence to form an outer box with an open top, and its length, width and height are 1000mm * 1000mm * 1500mm; the inner box has dimensions of 900mm * 900mm * 1400mm, and is coaxially nested with the outer box, forming a sealed annular flow channel between the two; the condensate circulation interface adopts a dual-channel design; the experimental gas inlet (31) and the outlet (34) are symmetric on both sides of the box and the inlet is higher than the outlet; the detachable top cover plate has the same length and width as the inner box and is used for airtight heat preservation; the anchor ears are located at the midpoints of each side of the top of the outer box and the midpoints of both sides of the bottom, and are used for overhead crane hoisting operations.

[0008] In one implementation, the overall dimensions of the condenser box are 960mm * 760mm * 1330mm, and it is connected by an extended pipeline through the condensate circulation interface and is equipped with a ball valve group.

[0009] In one implementation, the gas preparation module is composed of an air compressor, a pressure gauge, a buffer tank and an adsorption tower; the pressure gauge is located at the outlet of the air compressor; the buffer tank is connected to the air compressor in sequence by a pipeline; a group of two valves of the valve group are connected to the inlet of the adsorption tower; the adsorption tower adopts a top-inlet and bottom-outlet gas flow direction design.

[0010] In one implementation, the pipeline is a DN80 seamless stainless steel pipe with a pressure resistance level of 2.5MPa.

[0011] In one implementation, the gas delivery module is composed of a nitrogen storage tank, a pressure reducing valve, a thermal mass flowmeter and a stop check valve.

[0012] In one implementation, the acoustic parameter acquisition device includes an ultrasonic detector and a piezoelectric composite transducer.

[0013] For the described temperature-controlled gas-bearing formation simulation and acoustic multi-parameter detection device, preferably, the adsorption tower adopts a top-inlet and bottom-outlet gas flow direction design, has a porous structure (pore diameter Φ2 - 5mm), a working pressure of 0.6 - 1.0MPa (gauge pressure), and complies with the ASME BPVC VIII pressure vessel code.

[0014] In one implementation, the nitrogen storage tank is made of carbon steel, and the design pressure matches the outlet pressure of the air compressor.

[0015] In one implementation, the pressure reducing valve in the gas delivery module is a pilot-operated pressure reducing valve.

[0016] In one implementation, the flow meter is a thermal mass flow meter, which can directly measure the gas mass flow rate without temperature and pressure compensation, and the accuracy is ±1% - 1.5%.

[0017] In one implementation, the stop check valve is a double-plate check valve, and the valve body is made of SS304 / 316L material.

[0018] In one implementation, in the temperature and pressure adjustable soil acoustic parameter detection module, the reaction kettle consists of the left side 323 of the reaction kettle, the front side 324 of the reaction kettle, the right side 325 of the reaction kettle and the back side 326 of the reaction kettle, which are connected in sequence to form an outer box body with an open top. An inner box body is designed inside the outer box body, and the large and small box bodies are coaxially nested and arranged, and a closed flow channel is formed between the two for the condensate to circulate; 321 is the anchor ear of the outer box body of the reaction kettle located at the midpoint positions of each side of the top and the midpoint positions of two sides of the bottom for moving the reaction kettle; 322 is the detachable top cover plate of the reaction kettle, which plays the role of sealing and bearing the load to compact the experimental soil; 331 and 332 are the condensate circulation interfaces; 31 is the nitrogen inlet; 34 is the nitrogen outlet.

[0019] In one implementation, the thermometer is an infrared thermometer.

[0020] In one implementation, the inlet realizes the uniform distribution of nitrogen in the reaction kettle; the outlet realizes the uniform diffusion of nitrogen.

[0021] In one implementation, the condensate circulation interface adopts a dual-channel design, and the flow rate is set to 0.5 m / s.

[0022] In one implementation, the condensate tank adopts a DLSB-100 model low-temperature coolant circulation pump, and the circulation pump delivery function provides a cold source, and the temperature adjustment range is -30°C - room temperature, so as to realize the temperature control function of the device.

[0023] In one implementation, the ultrasonic detector in the data acquisition and processing module emits 16 test signals, and the data acquisition system built into the tester can measure and record the waveforms and data required for the experiment.

[0024] In one implementation, the transducer is a piezoelectric composite material, which has pressure resistance and waterproof sealing performance, and adopts dual channels to simultaneously measure and collect the waveforms of longitudinal waves and transverse waves. It is converted into a digital waveform by a CompuSope14100 acquisition card and recorded in a computer.

[0025] In one implementation, the computer software processing system uses concrete acoustic wave detection and analysis software, which can automatically analyze acoustic parameters such as sound velocity, frequency, and amplitude.

[0026] Due to the above technical solutions adopted by the present invention, it has the following advantages: 1. The gas preparation, transportation, temperature and pressure regulation, and acoustic detection modules of the present invention are seamlessly connected, realizing the integration of gas-bearing formation simulation and multi-parameter detection, and avoiding the cumbersome operations of traditional split-type equipment.

[0027] 2. The present invention uses a DLSB-100 type low-temperature circulating pump and an infrared thermometer in a coordinated control manner to achieve continuous and precise adjustment from -30°C to room temperature (temperature control accuracy ±0.5°C). Combined with the double-layer jacket structure design of the reaction kettle, the temperature gradient from polar permafrost to normal temperature formation can be simulated.

[0028] 3. The present invention realizes the independent regulation of porosity (10% - 45%), moisture content (5% - 30%), and cementation strength through the synergistic effect of a vertical double-layer buffer tank (volume matching coefficient 1.3) and a porous structure (pore diameter Φ2 - 5mm).

[0029] 4. The present invention adopts a top-inlet and bottom-outlet gas flow direction design and a double-plate check valve (made of SS304 / 316L material), combined with nitrogen storage tank pressure matching technology (0.6 - 1.0 MPa gauge pressure), to ensure the uniformity of gas diffusion in the reaction kettle.

[0030] 5. The present invention is based on a dual-channel condensate circulation interface (flow velocity 0.5 m / s) and a thermal mass flowmeter (accuracy ±1% - 1.5%) to realize the simulation of the dynamic balance of the gas-liquid-solid three phases during freeze-thaw cycles.

[0031] 6. The present invention uses a ZT-805 non-metallic ultrasonic monitoring and analyzer (16-channel test signals) and a piezoelectric composite transducer (with a pressure resistance of 20 MPa) to realize the synchronous acquisition of longitudinal and transverse wave dual channels (sampling rate 100 MHz), and the waveform distortion rate <0.5%.

[0032] 7. The pipeline of the present invention uses a DN80 stainless steel seamless pipe (with a pressure resistance of 2.5 MPa) in combination with a pilot-operated pressure reducing valve to ensure the safety of high-pressure gas transportation; the reaction kettle complies with the ASME BPVC VIII specification, and the leakage rate <0.005 mL / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of a temperature-controlled gas-bearing formation simulation and acoustic multi-parameter detection device of the present invention; Figure 2 It is an isometric view of the reaction kettle device provided by the present invention; Figure 3 It is a right view of the reaction kettle device provided by the present invention; In this application, all the attached drawings are schematic drawings, only used to illustrate the principle of the present invention and not drawn to actual scale.

[0034] The marks in the figures are as follows: 11 - air compressor, 12 - pressure gauge, 13 - buffer tank, 14 - valve group, 15 - adsorption tower, 21 - nitrogen storage tank, 22 - pressure reducing valve, 23 - flowmeter, 24 - stop check valve, 31 - air inlet, 32 - reaction kettle, 33 - condensate circulation interface, 34 - air outlet, 35 - ball valve group, 36 - condensate box, 41 - ultrasonic detector, 42 - transducer, 43 - computer software processing system, 321 - anchor ear, 322 - reaction kettle cover plate, 323 - left side of the reaction kettle, 324 - front of the reaction kettle, 325 - right side of the reaction kettle, 326 - back of the reaction kettle, 331 - condensate circulation interface 1, 332 - condensate circulation interface 2. Specific embodiments

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the attached drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0036] In view of the problems of the prior art, the embodiments of the present invention provide a temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device, including: a gas preparation module, a gas delivery module, a soil acoustic parameter detection module, and a data acquisition and processing module; wherein: The soil acoustic parameter detection module includes: a reaction kettle for providing an experimental soil accommodation space for simulating a gas-bearing formation, and a condensate box for regulating the experimental temperature environment of the reaction kettle; The gas preparation module, the gas delivery module, and the reaction kettle are sequentially connected through pipelines. The gas preparation module is used to prepare the gas for simulating the gas-bearing formation, deliver the gas through the gas delivery module, and adjust the gas pressure environment of the experiment; The data acquisition and processing module includes: an acoustic parameter acquisition device and a computer processing system; the acoustic parameter acquisition device is connected to the reaction kettle and is used to acquire acoustic parameter data after the experimental temperature environment and gas pressure environment of the reaction kettle meet the preset requirements; the computer processing system is used to process and analyze the acquired acoustic parameter data.

[0037] Based on the attached drawings of this application, the device provided by this application and its details will be further described in detail below, and its technical effects will be explained.

[0038] As Figure 1 shown, a temperature-controlled gas-bearing formation simulation and acoustic multi-parameter detection device according to the present invention includes: an air compressor 11, a pressure gauge 12, a buffer tank 13, a valve group 14, and an adsorption tower 15 to prepare nitrogen gas for the device to simulate the gas reservoir of the gas-bearing formation. It should be noted that the pipeline 5 mentioned in the present invention uses a DN80 stainless steel seamless pipe.

[0039] As Figure 1 shown, the device according to the present invention further includes: a nitrogen gas storage tank 21, a pressure gauge 22, a flow meter 23, a stop check valve 24, a pressure gauge 25, an air inlet 31, a reaction kettle 32, a condensate circulation interface 33, an air outlet 34, a ball valve group 35, a condensate box 36, an ultrasonic detector 41, a transducer 42, and a computer software processing system 43. Among them, the nitrogen gas storage tank 21 provides a stable pressure for transporting nitrogen gas, the pressure gauges 22, 25 and the flow meter 23 monitor the nitrogen gas flow condition, and the stop check valve 24 prevents the reverse flow of nitrogen gas; the reaction kettle 32 and the condensate box 35 realize the temperature control function of the device; the transducer 42 collects acoustic multi-parameters at four positions, and the position distribution is distinguished by color. The ultrasonic detector 41 converts the acoustic multi-parameters obtained by the transducer 42 into a waveform diagram, and the computer software processing system 43 further analyzes the acoustic data to improve the experimental accuracy.

[0040] In one or more embodiments, a ball valve group 35 is provided between the condensate circulation interface 33 and the condensate box 36 in the temperature-controlled gas-bearing formation simulation and acoustic multi-parameter detection device according to the present invention.

[0041] The working principle of the device of the present invention is as follows: S1, Gas preparation Start the air compressor 11 and the buffer tank 13, open the valve group 14 to make the adsorption tower 15 enter the working state, and open the nitrogen gas storage tank 21 to store nitrogen gas. It should be noted that during the whole process of preparing nitrogen gas, the indication of the pressure gauge 12 needs to be monitored in real time.

[0042] S2, Configuration of soil body and presetting of transducer Use 1250-mesh bentonite and 80-mesh quartz sand to configure a certain amount of mixed sand clay according to the experimental requirements. Prepare a neoprene airbag (not marked in the figure) equipped with an air charging and discharging interface, with a size of 900mm * 900mm * 200mm. Fill the uncompacted mixed sand clay into the neoprene airbag, and the remaining mixed sand clay is compacted in two pieces for standby (each piece has a size of 900mm * 900mm * 600mm). Fix the transducer 421 at the left side of the bottom of the reaction kettle 32, and fix the transducer 422 at the right side of the bottom of the reaction kettle 32.

[0043] S3, Fill the first layer of soil body and start the condensate box Add a compacted piece of mixed sand clay in S2 to the reactor 32. Fix the transducer 3 on the left side of this plane and fix the transducer 4 on the right side of this plane (see the schematic diagram of the position in the attached Figure 1 ). Turn on the circulation function of the condenser box 36, open the ball valve 35 to add condensate to the condenser box 36 until the condensate flows back from the flow channel in the interlayer of the reactor 32 to the condenser box 36, indicating that the operation of adding condensate is completed, and then turn on the cooling function of the condenser box 36.

[0044] S4, Construction of gas-bearing formation Connect the neoprene airbag interface in S2 to the air inlet 31 and the air outlet 34 of the reactor 32. Turn on the nitrogen storage tank 21 and the stop check valve 24. Judge whether the gas content in the formation reaches the experimental requirements according to the flowmeter 23. After reaching the experimental requirements, close the stop check valve. During the inflation process, fix the transducers 5 and 6 on the upper surface of the neoprene airbag (the positions of transducer 5 and transducer 3 are perpendicular to each other along the axis, and the positions of transducer 6 and transducer 1 are perpendicular to each other along the axis). S5, Fill the complete formation to reach the experimental set temperature Add the remaining compacted mixed sand clay in step S3 to the reactor, and embed the transducers 7 and 8 at the top (the positions of transducer 7 and transducer 4 are perpendicular to each other along the axis, and the positions of transducer 8 and transducer 2 are perpendicular to each other along the axis). Use the reactor cover plate 322 to cover the reactor 32. Remove the reactor cover plate 322 when the reactor reaches the experimental required temperature, and turn on the heat preservation function of the condenser box 36.

[0045] S6, Synchronous acquisition and processing of data Excite 16 test signals (frequency 10Hz~20kHz) through the ultrasonic detector 41, and synchronously receive the longitudinal wave and transverse wave waveforms by the transducers 1~8; the CompuSope14100 acquisition card (sampling rate 100MHz) converts the signals into digital sequences, and automatically analyzes acoustic parameters such as sound velocity, frequency, and amplitude through the Zhongtuo Keyi concrete acoustic wave detection and analysis software V3.1; the computer processing system 43 further analyzes and processes the acoustic parameters to calculate the wave impedance and sound attenuation coefficient.

[0046] In several embodiments provided by the present invention, it should be understood that the disclosed system and method can be implemented in other ways. For example, the system device embodiments described above are only illustrative. For example, the above division of module units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in electrical, mechanical or other forms.

[0047] The integrated unit implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium and include several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute some steps of the methods in the various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device, characterized in that, Including: A gas preparation module, a gas delivery module, a soil acoustic parameter detection module, and a data acquisition and processing module; wherein: The soil acoustic parameter detection module includes a reaction kettle for providing an experimental soil accommodation space for simulating a gas-bearing formation, and a condensing box for regulating the experimental temperature environment of the reaction kettle; The gas preparation module, the gas delivery module, and the reaction kettle are sequentially connected by pipelines. The gas preparation module is used to prepare the gas for simulating the gas-bearing formation, deliver the gas through the gas delivery module, and adjust the experimental gas pressure environment; The data acquisition and processing module includes an acoustic parameter acquisition device and a computer processing system; the acoustic parameter acquisition device is connected to the reaction kettle and is used to acquire acoustic parameter data after the experimental temperature environment and gas pressure environment of the reaction kettle reach the preset requirements; the computer processing system is used to process and analyze the acquired acoustic parameter data.

2. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 1, wherein, The reaction kettle adopts a structure of nested inner and outer double-layer boxes; wherein, the inner box is used to accommodate the experimental soil; the space between the inner box and the outer box is used for the circulation of the condensate of the condensing box.

3. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 2, wherein, The reaction kettle includes: the outer box is composed of the left side of the reaction kettle, the front of the reaction kettle, the right side of the reaction kettle, and the back of the reaction kettle connected in sequence to form a top-open outer box, with its length, width, and height dimensions of 1000mm * 1000mm * 1500mm; the inner box has dimensions of 900mm * 900mm * 1400mm and is coaxially nested with the outer box, forming a closed annular flow channel between the two; the condensate circulation interface adopts a dual-channel design; the experimental gas inlet (31) and the outlet (34) are symmetric on both sides of the box and the inlet is higher than the outlet; the detachable top cover plate has the same length and width as the inner box and is used for airtight heat preservation; the anchor ears are located at the midpoints of each side of the top of the outer box and the midpoints of both sides of the bottom and are used for hoisting operations.

4. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 2, wherein The overall dimensions of the condensing box are 960mm * 760mm * 1330mm, and it is connected by an extended pipeline through the condensate circulation interface and is equipped with a ball valve group.

5. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 1, characterized in that, The gas preparation module consists of an air compressor, a pressure gauge, a buffer tank, and an adsorption tower; the pressure gauge is located at the outlet of the air compressor; the buffer tank is sequentially connected to the air compressor by a pipeline; a group of two valves in the valve group is connected to the inlet of the adsorption tower; the adsorption tower adopts a top-inlet and bottom-outlet gas flow direction design.

6. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 5, characterized in that The pipeline is a DN80 seamless stainless steel pipe with a pressure resistance rating of 2.5MPa.

7. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 1, characterized in that The gas delivery module consists of a nitrogen storage tank, a pressure reducing valve, a thermal mass flowmeter, and a stop check valve.

8. The temperature-controlled gas-bearing formation simulation and acoustic parameter monitoring device according to claim 1, wherein The acoustic parameter acquisition device includes an ultrasonic detector and a piezoelectric composite transducer.

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