Soluble information storage module and oil-gas well downhole temperature and pressure accuracy method thereof

Abstract

The invention provides a soluble information storage module and an oil and gas well downhole temperature and pressure accurate method thereof, and relates to the technical field of petroleum and natural gas exploration. According to the soluble information storage module, in the fracturing process, a data acquisition component detects the temperature and pressure in the oil and gas well downhole fracturing stage, and the soluble information component is dissolved; the underground liquid is dissolved in the dissolvable section on the connecting line between the data storage component and the data acquisition component, the data storage component and the data acquisition component are separated after dissolution, and the data storage component is recycled through a separation method. The actual underground temperature and pressure of the oil and gas well in the fracturing process are effectively reduced through the collected data in the data storage component, and the technical problems that in the prior art, a traditional oil and gas well underground temperature and pressure measuring method is large in measuring error, and the actual underground temperature and pressure of the oil and gas well cannot be accurately measured are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration, and in particular to a soluble information storage module and a method for accurately determining the downhole temperature and pressure of an oil and gas well. Background Art

[0002] At present, in the process of oil and gas exploration and development, during the vertical well and horizontal well fracturing stage, the main methods for measuring the downhole temperature and pressure of oil and gas wells are optical fiber measurement or pressure gauge measurement through steel wire after fracturing. The optical fiber measurement method uses the changes in optical fiber after being affected by downhole temperature and pressure to transmit signals through the refraction of light after the changes. The signals transmitted by light refraction are easily affected and can only roughly reflect the changes in temperature and pressure. The accuracy is poor and the actual temperature and pressure of the oil and gas well cannot be accurately measured. The pressure gauge measurement method through steel wire operation after fracturing can only collect formation pressure and temperature data, and cannot accurately obtain the temperature and pressure during the fracturing process. It can only be calculated through inference, with large errors. Summary of the invention

[0003] The purpose of the present invention is to provide a soluble information storage module and an accurate method for measuring the downhole temperature and pressure of an oil and gas well, so as to alleviate the technical problem that the traditional method for measuring the downhole temperature and pressure of an oil and gas well in the prior art has large measurement errors and cannot accurately measure the actual temperature and pressure of the oil and gas well.

[0004] In a first aspect, the present invention provides a soluble information storage module, comprising: a soluble information component and a storage module assembly;

[0005] The soluble information component has a cavity to form an accommodating space, and the soluble information component is configured to dissolve after contacting with downhole fluid during the fracturing process;

[0006] The storage module assembly is disposed in the accommodation space of the soluble information component;

[0007] The storage module assembly includes a data storage component and a data acquisition component;

[0008] The data acquisition component is used to detect the temperature and pressure of the oil and gas well during the downhole fracturing stage;

[0009] The data storage component is used to store the temperature information and pressure information detected by the data acquisition component;

[0010] The connection line between the data storage component and the data acquisition component has a dissolvable section, and the dissolvable section is configured to dissolve after contacting with downhole fluid during the fracturing process to separate the data storage component from the data acquisition component.

[0011] In an alternative embodiment,

[0012] The data acquisition component includes a circuit board;

[0013] The data storage component is connected to the circuit board via a wire, and one end of the wire connected to the circuit board is sleeved with a soluble metal tube, and the soluble metal tube forms the soluble section.

[0014] In an alternative embodiment,

[0015] The data acquisition component also includes a temperature sensor;

[0016] The temperature sensor is arranged on the circuit board, and is used for detecting downhole temperature and transmitting the detected temperature data to the data storage component.

[0017] In an alternative embodiment,

[0018] The data acquisition component also includes a pressure sensor and a pressure transmitter;

[0019] The pressure sensor is mounted on the inner wall of the soluble information component, the pressure sensor is connected to the pressure transmitter, the pressure transmitter is connected to the circuit board, and the pressure sensor is used to measure downhole pressure and transmit the detected pressure data to the data storage component.

[0020] In an alternative embodiment,

[0021] The soluble information storage module also includes a snap ring;

[0022] The clamping ring is clamped on the inner wall of the soluble information component, and the clamping ring is connected to the pressure sensor. The clamping ring is used to fix the pressure sensor on the inner wall of the soluble information component.

[0023] In an alternative embodiment,

[0024] The data acquisition component also includes a single chip microcomputer;

[0025] The single chip microcomputer is connected to the circuit board, and the single chip microcomputer is used for processing temperature data and pressure data.

[0026] In an alternative embodiment,

[0027] The data acquisition component also includes a battery;

[0028] The battery is connected to the circuit board and is used to provide electrical energy to the circuit board.

[0029] In an alternative embodiment,

[0030] The soluble information component includes an upper hemisphere of the soluble information ball and a lower hemisphere of the soluble information ball;

[0031] The upper hemisphere of the soluble information ball and the lower hemisphere of the soluble information ball are connected to each other to enclose and form the accommodating space, and a sealing ring is arranged at the connection between the upper hemisphere of the soluble information ball and the lower hemisphere of the soluble information ball.

[0032] In a second aspect, the present invention provides a method for accurately measuring downhole temperature and pressure of an oil and gas well based on the soluble information storage module, comprising the following steps:

[0033] Put the soluble information storage module into the oil and gas well to record the temperature and pressure;

[0034] The fracturing work starts, the soluble information component dissolves, and then the soluble metal tube between the data storage component and the circuit board dissolves, and the data storage component is separated from the circuit board;

[0035] The data storage component performs flowback.

[0036] In an alternative embodiment,

[0037] The following steps are involved:

[0038] The returned data storage components are collected, the collected data storage balls are read, and the read data are analyzed to complete the temperature and pressure data collection in the downhole fracturing stage of the oil and gas well.

[0039] The soluble information storage module provided by the present invention has a data acquisition component that detects the temperature and pressure of the oil and gas well during the downhole fracturing stage during the fracturing process, the soluble information component dissolves, and the soluble section on the connecting line between the downhole liquid and the data storage component and the data acquisition component dissolves. After the dissolution, the data storage component is separated from the data acquisition component, and the data storage component is recovered through a separation method. The actual situation of the oil and gas well in the downhole during the fracturing process is effectively restored through the data collected in the data storage component, which alleviates the technical problem that the traditional method for measuring the downhole temperature and pressure of the oil and gas well in the prior art has large measurement errors and cannot accurately measure the actual temperature and pressure of the oil and gas well. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1A schematic diagram of the overall structure of a soluble information storage module provided by an embodiment of the present invention;

[0042] Figure 2 A schematic structural diagram of the lower hemisphere of the soluble information ball and the storage module assembly in the soluble information storage module provided by an embodiment of the present invention;

[0043] Figure 3 A cross-sectional view of the internal structure of the upper hemisphere and the lower hemisphere of the soluble information ball in the soluble information storage module provided by the embodiment of the present invention;

[0044] Figure 4 A schematic diagram of the structure of a storage module component in a soluble information storage module provided by an embodiment of the present invention.

[0045] Icons: 1- snap ring; 2- sealing ring; 3- upper hemisphere of soluble information ball; 4- lower hemisphere of soluble information ball; 5- temperature sensor; 6- pressure sensor; 7- pressure transmitter; 8- data storage component; 9- single chip microcomputer; 10- circuit board; 11- battery; 12- placement slot. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the soluble information storage module provided in this embodiment includes: a soluble information component and a storage module assembly; the soluble information component has a cavity to form an accommodating space, and the soluble information component is configured to be able to dissolve after contacting with downhole liquid during the fracturing process.

[0048] Specifically, the soluble information component specifically includes an upper hemisphere 3 of the soluble information ball and a lower hemisphere 4 of the soluble information ball. The upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball can be dissolved after contacting the downhole liquid. The upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball are connected to each other to form a spherical structure, and an accommodating space is formed. The upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball can be connected by snapping or by threading. A sealing ring 2 is provided at the connection between the upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball. It should be noted that the sealing ring 2 needs to be installed on the lower hemisphere 4 of the soluble information ball first, and then the upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball are tightened.

[0049] The storage module assembly is arranged in the accommodating space of the soluble information component, and the storage module assembly is wrapped by the soluble information component; the storage module assembly includes a data storage component 8 and a data acquisition component; the data acquisition component detects the temperature and pressure of the oil and gas well during the downhole fracturing stage; the data storage component 8 stores the temperature information and pressure information detected by the data acquisition component; the connecting line between the data storage component 8 and the data acquisition component has a soluble section, which can dissolve after contacting with the downhole liquid during the fracturing process, and after the soluble section dissolves, the data storage component 8 is separated from the data acquisition component.

[0050] The data acquisition component includes a circuit board 10; the data storage component 8 is connected to the circuit board 10 through a wire, and a soluble metal tube is sleeved on one end of the wire connected to the circuit board 10, and the soluble metal tube forms a soluble section. During the fracturing process, as the soluble information component dissolves, the downhole liquid enters the interior of the soluble information component and contacts the soluble metal tube, and the soluble metal tube dissolves. After the soluble metal tube dissolves, the data storage component 8 is separated from the circuit board 10.

[0051] As a further preferred embodiment, before the data storage component 8 is connected to the circuit board 10, it is necessary to strip the wire of the data storage component 8 to a certain length, put a soluble metal tube of a certain length on the stripped wire of the data storage component 8, connect the data storage component 8 with the soluble metal tube to the circuit board 10, and finally flatten the soluble metal tube on the data storage component 8 connected to the circuit board 10. The length of the soluble metal tube of a certain length is generally 5-10 mm.

[0052] The data acquisition component also includes a temperature sensor 5 ; the temperature sensor 5 is disposed on the circuit board 10 , and the temperature sensor 5 is used to detect the downhole temperature and transmit the detected temperature data to the data storage component 8 .

[0053] The data acquisition component also includes a pressure sensor 6 and a pressure transmitter 7; the pressure sensor 6 is installed on the inner wall of the soluble information component, the pressure sensor 6 is connected to the pressure transmitter 7, the pressure transmitter 7 is connected to the circuit board 10, the pressure sensor 6 is used to measure the downhole pressure, and transmit the detected pressure data to the data storage component 8; the data acquisition component also includes a single-chip microcomputer 9; the single-chip microcomputer 9 is connected to the circuit board 10, and the single-chip microcomputer 9 is used to process temperature data and pressure data; the data acquisition component also includes a battery 11; the battery 11 is connected to the circuit board 10, and is used to provide electrical energy to the circuit board 10.

[0054] Specifically, the storage module component system includes a temperature sensor 5, four pressure sensors 6, four pressure transmitters 7, three data storage components 8, a single-chip computer 9, a circuit board 10, and a battery 11. The temperature sensor 5, the pressure sensor 6, the pressure transmitter 7, the data storage device 8, the single-chip computer 9, the circuit board 10 and the battery 11 are connected in sequence. The temperature sensor 5 is connected to the circuit board 10 to measure the downhole temperature, the pressure sensor 6 is connected to the pressure transmitter 7 to measure the downhole pressure, the pressure transmitter 7 is connected to the circuit board 10 to transmit the pressure signal, the data storage component 8 is connected to the circuit board 10 to store the temperature and pressure data, the single-chip computer 9 is connected to the circuit board 10 to provide data processing, and the battery 11 is connected to the circuit board 10 to continuously power the circuit.

[0055] As a further preferred design, the upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball are provided with a hole structure for placing the pressure sensor 6, the lower hemisphere 4 of the soluble information ball is provided with a hole structure for placing the pressure transmitter 7, and the lower hemisphere 4 of the soluble information ball is provided with a hole structure for placing the battery 11. The pressure sensor 6 is installed with the upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball through the retaining ring 1, and the battery 11 is installed with the lower hemisphere 4 of the soluble information ball by interference fit.

[0056] The soluble information storage module further comprises a clamp ring 1 which is clamped on the inner wall of the soluble information component and connected to the pressure sensor 6 . The clamp ring 1 is used to fix the pressure sensor 6 on the inner wall of the soluble information component.

[0057] Specifically, a fixed slot hole is provided on the inner wall of the soluble information component, and the hole wall of the fixed slot hole has a groove. The clamping ring 1 is provided in the groove, and the clamping ring 1 can be clamped in the fixed slot hole. A hole structure is opened on the pressure sensor 6, and the clamping ring 1 passes through the hole structure, so that the pressure sensor 6 is installed with the upper hemisphere 3 of the soluble information ball and the lower hemisphere 4 of the soluble information ball through the clamping ring 1. The number of the clamping rings 1 is the same as the number of the pressure sensors 6.

[0058] In addition, a placement slot 12 is provided on the inner wall of the soluble information component, and the pressure transmitter can be installed and fixed in the placement slot 12 .

[0059] The soluble information storage module provided in this embodiment has a data acquisition component that detects the temperature and pressure of the oil and gas well during the fracturing stage in the downhole during the fracturing process, and the soluble information component dissolves, and the soluble section on the connecting line between the downhole liquid and the data storage component 8 and the data acquisition component dissolves, and the data storage component 8 is separated from the data acquisition component after dissolution, and the data storage component 8 is recovered through a separation method, and the actual situation of the oil and gas well in the downhole during the fracturing process is effectively restored through the data collected in the data storage component 8, thereby alleviating the technical problem that the traditional method for measuring the downhole temperature and pressure of the oil and gas well in the prior art has large measurement errors and cannot accurately measure the actual temperature and pressure of the oil and gas well.

[0060] The method for accurately measuring the downhole temperature and pressure of an oil and gas well based on a soluble information storage module provided in the present embodiment comprises the following steps: placing a soluble information storage module into the downhole of an oil and gas well to record the temperature and pressure; starting the fracturing operation, dissolving the soluble information component, and then dissolving the soluble metal tube between the data storage component 8 and the circuit board 10, separating the data storage component 8 from the circuit board 10; returning the data storage component 8; collecting the returned data storage components 8, reading the data from the collected data storage balls, analyzing the read data, and completing the temperature and pressure data collection at the downhole fracturing stage of the oil and gas well.

[0061] Step 1, connect the pressure sensor 6 to the pressure transmitter 7, connect the pressure transmitter 7, the temperature sensor 5, and the single-chip computer 9 to the circuit board 10, strip the wire of the data storage component 8 to a certain length, put a certain length of soluble metal tube on the stripped wire of the data storage component 8, connect the data storage component 8 with the soluble metal tube to the circuit board 10, flatten the soluble metal tube on the data storage component 8 connected to the circuit board 10, install the pressure sensor 6 in the holes of the upper hemisphere 3 and the lower hemisphere 4 of the soluble information ball, install the snap ring 1 in the holes of the upper hemisphere 3 and the lower hemisphere 4 of the soluble information ball, install the battery 11 in the hole of the lower hemisphere 4 of the soluble information ball, connect the battery 11 to the circuit board 10 with the above connection, connect the circuit board 10 with the above connection and the lower hemisphere 4 of the soluble information ball, install the sealing ring 2 on the lower hemisphere 4 of the soluble information ball, and tighten the upper hemisphere 3 of the soluble information ball with the lower hemisphere 4 of the soluble information ball.

[0062] Step 2: Put the tightened soluble information ball into the oil and gas well, start recording the temperature and pressure, start fracturing after the soluble information ball is sealed, and the soluble information ball begins to dissolve. After the soluble information ball dissolves, the data storage component 8 is separated from the circuit board 10. After the data storage component 8 is separated from the circuit board 10, the data storage component 8 is returned.

[0063] Step three: collect the returned data storage component 8, read the collected data from the data storage component 8, analyze the read data, and complete the temperature and pressure data collection in the downhole fracturing stage of the oil and gas well.

[0064] Compared with the existing soluble ball technology, the present invention can accurately and effectively complete the measurement and storage of temperature and pressure in the downhole fracturing stage of oil and gas wells.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soluble information storage module, It is characterized in that include: Soluble information components and storage module components; The soluble information component has a cavity to form an accommodating space, and the soluble information component is configured to dissolve after contacting with downhole fluid during the fracturing process; The storage module assembly is disposed in the accommodation space of the soluble information component; The storage module assembly comprises a data storage component (8) and a data acquisition component; The data acquisition component is used to detect the temperature and pressure of the oil and gas well during the downhole fracturing stage; The data storage component (8) is used to store the temperature information and pressure information detected by the data acquisition component; The connection line between the data storage component (8) and the data acquisition component has a dissolvable section, and the dissolvable section is configured to dissolve after contacting with downhole fluid during the fracturing process, so as to separate the data storage component (8) from the data acquisition component.

2. The soluble information storage module according to claim 1, It is characterized in that The data acquisition component comprises a circuit board (10); The data storage component (8) is connected to the circuit board (10) via a wire, and one end of the wire connected to the circuit board (10) is sleeved with a soluble metal tube, and the soluble metal tube forms the soluble section.

3. The soluble information storage module according to claim 2, It is characterized in that The data acquisition component also includes a temperature sensor (5); The temperature sensor (5) is arranged on the circuit board (10), and the temperature sensor (5) is used to detect the downhole temperature and transmit the detected temperature data to the data storage component (8).

4. The soluble information storage module according to claim 3, It is characterized in that The data acquisition component also includes a pressure sensor (6) and a pressure transmitter (7); The pressure sensor (6) is mounted on the inner wall of the soluble information component, the pressure sensor (6) is connected to the pressure transmitter (7), the pressure transmitter (7) is connected to the circuit board (10), and the pressure sensor (6) is used to measure downhole pressure and transmit the detected pressure data to the data storage component (8).

5. The soluble information storage module according to claim 4, It is characterized in that The soluble information storage module further comprises a snap ring (1); The clamping ring (1) is clamped on the inner wall of the soluble information component, and the clamping ring (1) is connected to the pressure sensor (6). The clamping ring (1) is used to fix the pressure sensor (6) on the inner wall of the soluble information component.

6. The soluble information storage module according to claim 5, It is characterized in that The data acquisition component also includes a single chip microcomputer (9); The single chip microcomputer (9) is connected to the circuit board (10), and the single chip microcomputer (9) is used to process temperature data and pressure data.

7. The soluble information storage module according to claim 6, It is characterized in that The data acquisition component also includes a battery (11); The battery (11) is connected to the circuit board (10) and is used to provide electrical energy to the circuit board (10).

8. The soluble information storage module according to any one of claims 1 to 7, It is characterized in that The soluble information component comprises an upper hemisphere of the soluble information sphere (3) and a lower hemisphere of the soluble information sphere (4); The upper hemisphere (3) of the soluble information ball and the lower hemisphere (4) of the soluble information ball are connected to each other to enclose and form the accommodation space. A sealing ring (2) is provided at the connection between the upper hemisphere (3) of the soluble information ball and the lower hemisphere (4) of the soluble information ball.

9. A method for accurately measuring downhole temperature and pressure of oil and gas wells based on the soluble information storage module according to any one of claims 1 to 8, It is characterized in that The following steps are involved: Put the soluble information storage module into the oil and gas well to record the temperature and pressure; The fracturing operation begins, the soluble information component dissolves, and then the soluble metal tube between the data storage component (8) and the circuit board (10) dissolves, and the data storage component (8) is separated from the circuit board (10); The data storage component (8) performs backflow.

10. The method for accurately measuring downhole temperature and pressure of an oil and gas well according to claim 9, It is characterized in that The following steps are involved: The returned data storage component (8) is collected, the collected data storage ball is read, and the read data is analyzed to complete the temperature and pressure data collection in the downhole fracturing stage of the oil and gas well.

Images