Oil field underground storage type multipoint temperature measuring device

Abstract

The utility model discloses an oil field underground storage type multipoint temperature measuring device. The device comprises a first MCU module; the communication storage unit is bidirectionally and electrically connected with the first MCU unit; the input end of the current and voltage measurement and control unit is bidirectionally and electrically connected with the first MCU unit, and the current and voltage measurement and control unit is electrically connected with the output end of the communication storage unit; the TBUS bus is electrically connected with the output end of the current and voltage measurement and control unit; the input end of the data receiving module is electrically connected with the TBUS bus, and the output end of the data receiving module is electrically connected with the MCU module; a second MCU module; the input end of the address receiving module is electrically connected with the TBUS bus, and the output end of the address receiving module is electrically connected with the input end of the second MCU module; the input end of the data loading module is electrically connected with the output end of the second MCU module, and the output end of the data loading module is electrically connected with the TBUS; and the input ends of the plurality of temperature measuring units are electrically connected with the TBUS bus. The temperature of each layer in a well section can be measured simultaneously, multiple thermometers are not needed, and the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to an oil field downhole storage type multi-point temperature measuring device, belonging to the technical field of oil and gas field exploration and development. Background Art

[0002] During oilfield exploration and development, changes in reservoir temperature and wellbore fluid temperature are crucial parameters and information. Measuring well temperature (temperature profile along the wellbore) and temperature changes at a specific depth is often used to identify producing zones, identify casing channeling and leakage, and evaluate the effectiveness of acidizing and fracturing.

[0003] Normally, measuring the well temperature and temperature changes at a certain depth in the well is a conventional temperature measurement technology, so a storage thermometer measurement process is often used. It includes: a temperature probe, a signal acquisition and processing circuit, and a battery-powered part, which only measures and records the temperature at the probe depth point. If it is necessary to measure the temperature at multiple depth points in a certain well section (time-temperature data, i.e., temperature profile), multiple corresponding thermometer instruments must be lowered for temperature measurement. This technical solution has the following disadvantages: (1) Due to the limitation of the length of the instrument itself, the depth interval of the temperature measurement point is large, which affects the application of temperature data. (2) A thermometer instrument needs to be installed at each temperature measurement point, which is cumbersome to operate. (3) It is inefficient and expensive.

[0004] The oilfield downhole multi-point storage temperature measurement device pre-deploys a batch of temperature probes (temperature acquisition units) at varying intervals, based on the required acquisition point spacing and acquisition length of the target well section. It measures downhole temperature data in the target well section and records it in the FLASH memory of the temperature storage sub. After the test is completed, the instrument (temperature acquisition unit and temperature storage sub) is removed from the test string and the temperature data stored in the storage sub is replayed. Utility Model Content

[0005] The utility model designs and develops an oilfield downhole storage type multi-point temperature measuring device, which can simultaneously measure the temperature of each layer in the well section without the need to lower multiple thermometers, thereby improving measurement accuracy and efficiency.

[0006] The technical solution provided by this utility model is:

[0007] An oilfield downhole storage type multi-point temperature measuring device, comprising:

[0008] First MCU module;

[0009] a communication storage unit, which is bidirectionally electrically connected to the first MCU module;

[0010] a current and voltage measurement and control unit, the input end of which is bidirectionally electrically connected to the first MCU module and is also electrically connected to the output end of the communication storage unit;

[0011] A TBUS bus electrically connected to the output end of the current and voltage measurement and control unit;

[0012] a data receiving module, an input end of which is electrically connected to the TBUS bus, and an output end of which is electrically connected to the first MCU module;

[0013] Second MCU module;

[0014] an address receiving module, an input end of which is electrically connected to the TBUS bus, and an output end of which is electrically connected to an input end of the second MCU module;

[0015] a data loading module, whose input end is electrically connected to the output end of the second MCU module, and whose output end is electrically connected to the TBUS bus;

[0016] A plurality of temperature measurement units have input ends electrically connected to the TBUS bus.

[0017] Preferably, it also includes:

[0018] A power management module is used to supply power to the current and voltage measurement and control unit when the current and voltage measurement and control unit is started.

[0019] Preferably, the communication storage unit includes:

[0020] A USB interface, whose input end communicates with the computer and whose output end is bidirectionally electrically connected to the first MCU module;

[0021] A FLASH storage chip is bidirectionally electrically connected to the first MCU module.

[0022] Preferably, the current and voltage measurement and control unit includes:

[0023] a bus control module, the input end of which is electrically connected to the output end of the USB interface, and the output end of which is electrically connected to the input end of the TBUS;

[0024] a current measurement module, which is bidirectionally electrically connected to the first MCU module;

[0025] A voltage measurement module is bidirectionally electrically connected to the first MCU module.

[0026] Preferably, it also includes:

[0027] A 3.3V power supply module has an input end electrically connected to the output end of the TBUS.

[0028] Preferably, it also includes:

[0029] An A / D conversion module, an input end of which is bidirectionally electrically connected to the second MCU module;

[0030] The sensor module has an input end that is bidirectionally electrically connected to the A / D conversion module.

[0031] The beneficial effects of the present invention include: The oilfield downhole storage-type multi-point temperature measurement device, which connects a temperature storage sub and a temperature acquisition unit via a single-core structure, can simultaneously measure the temperature of each layer within a well section without requiring multiple thermometers. The device offers high temperature accuracy, is easy to operate, and improves measurement accuracy and efficiency. It can be used to analyze temperature profile data along the wellbore, calculate oil, gas, and water production in each layer within the well section, and analyze oil casing leakage or crossflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the oilfield downhole storage-type multi-point temperature measurement device described in the utility model.

[0033] Figure 2 This is a structural schematic diagram of the oil field downhole storage type multi-point temperature measurement device described in the utility model. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0035] like Figure 1-2 As shown, the utility model provides an oil field downhole storage type multi-point temperature measuring device, which can simultaneously measure the temperature of each layer in the well section without the need to lower multiple thermometers, thereby improving measurement accuracy and measurement efficiency.

[0036] The oilfield downhole storage type multi-point temperature measurement device mainly includes a temperature storage short section 1 and a temperature acquisition unit 2, and the two sections are connected by a single core structure.

[0037] The temperature storage short section is module 1, which is the control center of the entire system. It specifically includes: USB interface 1-1, FLASH storage chip 1-2, main control line module 1-3, current measurement module 1-4, voltage measurement module 1-5, first MCU module 1-6, isolation module 1-7, data receiving module 1-8, address loading module 1-9, and power management module 1-10. Among them, the input end of the USB interface 1-1 communicates with the computer, and the output end is bidirectionally electrically connected to the first MCU module 1-6. The USB interface 1-1 and the FLASH storage chip 1-2 form a communication storage unit; the input end of the bus control module 1-3 is electrically connected to the output end of the USB interface 1-1, and the output end is electrically connected to the TBUS bus; the current measurement module 1-4 is bidirectionally electrically connected to the first MCU module 1-6; the voltage measurement module 1-5 is bidirectionally electrically connected to the first MCU module 1-6; the bus control module 1-3, the current measurement module 1-4, and the voltage measurement module 1-5 form a current and voltage measurement and control unit; the TBUS bus is electrically connected to the output end of the current and voltage measurement and control unit; the input end of the data receiving module 1-8 is electrically connected to the TBUS bus, and the output end is electrically connected to the first MCU module 1-6.

[0038] like Figure 1 As shown, USB port 1-1 is the communication hub between module 1 and the computer, primarily enabling communication between module 1 and the computer. USB port 1-1 allows for instrument configuration of module 1, data reading from FLASH memory chip 1-2, and real-time instrument control. USB port 1-1 only operates when a USB cable is plugged in; it is inoperative in measurement mode.

[0039] FLASH memory chip 1-2 is the storage space of module 1, primarily used to store data from the instrument's voltage, current, and temperature acquisition units, as well as related data, in measurement mode. FLASH memory chip 1-2 is highly reliable and uses non-volatile storage. Even if the downhole battery runs out or other faults occur, as long as FLASH memory chip 1-2 is intact, stored data will not be lost.

[0040] The bus control module 1-3 is the TBUS power control terminal of module 1, which mainly controls whether to supply power to the TBUS bus. When the bus control module 1-3 receives the power-on command, it opens the switch step by step through the MOS tube to transmit power to the TBUS bus.

[0041] The current measurement module 1-4 is the current monitor of the system, which mainly monitors the working current of the entire discrete temperature measurement system in real time and feeds back the measured current information to the first MCU module 1-6. The first MCU module 1-6 stores the obtained current information in the FLASH storage chip 1-2.

[0042] Voltage measurement module 1-5 is the system's voltage monitor. In measurement mode, it monitors the battery voltage. The measured voltage information is stored in FLASH memory chip 1-2 via first MCU module 1-6. Together with current measurement module 1-4, voltage measurement module 1-5 monitors system operating status and detects battery loss.

[0043] The first MCU module 1-6 is the control brain of module 1. All control logic of module 1 is determined by the first MCU module 1-6, which mainly includes: USB chip control, FLASH chip control, TBUS bus control, and various data acquisition controls.

[0044] The isolation module 1-7 is the power isolator of module 1. Since the internal resistance of the battery pack is relatively low, the isolation module 1-7 needs to be added between the battery pack and the TBUS.

[0045] The data receiving module 1-8 is the data receiving station of module 1. It strips the data loaded onto the TBUS bus by the temperature acquisition unit, and then loads the stripped data into the first MCU module 1-6. In the USB communication mode, the first MCU module 1-6 directly transmits the obtained data to the computer through the USB chip; in the measurement mode, the first MCU module 1-6 transmits the received data to the FLASH storage chip 1-2 for storage.

[0046] The address loading module 1-9 is the data transmission station of module 1. Module 1 mainly sends matching address information to the temperature acquisition unit part one by one through the address loading module 1-9. After each module of the temperature acquisition unit part matches the corresponding address information, it loads its corresponding temperature information onto the TBUS bus.

[0047] Power management module 1-10 is the power control station of the system, which mainly determines the power supply mode of the system through the interface. When module 1 is connected to USB, the system is powered by the computer; when module 1 is connected to the measurement mode control plug-in, the system is powered by the battery in power management module 1-10.

[0048] Temperature Acquisition Unit 2, consisting of Module 2, Module 3, Module 4, and so on, is the temperature acquisition terminal of the discrete temperature measurement device. Because Temperature Acquisition Unit 2 needs to collect temperatures at multiple locations underground, it requires scalability and is therefore divided into Module 2, Module 3, Module 4, and so on. Each module in the Temperature Acquisition Unit functions identically, differing only in their matching addresses. When an address appears on the TBUS line, the module with the matching address can upload data.

[0049] The temperature acquisition unit is specifically divided into: an address receiving module 2-1, a data loading module 2-2, a second MCU module 2-3, a 3.3V power supply module 2-4, an A / D conversion module 2-5, and a sensor module 2-6. The input of the address receiving module 2-1 is electrically connected to the TBUS bus, and the output is electrically connected to the input of the second MCU module; the input of the data loading module 2-2 is electrically connected to the output of the second MCU module, and the output is electrically connected to the TBUS bus; the input of the A / D conversion module 2-5 is bidirectionally electrically connected to the second MCU module 2-3, and the output is bidirectionally electrically connected to the input of the sensor module 2-6.

[0050] The address receiving module 2-1 is the data receiving station of the temperature acquisition unit. When module 1 loads the matching address information onto the TBUS line, the temperature acquisition unit receives the matching address on the TBUS line through the address receiving module 2-1, and then passes it to the second MCU module 2-3 for corresponding analysis.

[0051] The data loading module 2-2 is the data sending station of the temperature acquisition unit. When the second MCU module 2-3 of the temperature acquisition unit analyzes and matches the received matching address successfully, the data loading module 2-2 loads the temperature information onto the TBUS bus.

[0052] MCU 2-3 is the control core of the temperature acquisition unit. All control logic of the temperature acquisition unit is determined by it, including TBUS bus response and A / D chip control.

[0053] The 3.3V power supply module 2-4 is the energy core of the temperature acquisition unit. It converts the power on the TBUS bus into 3.3V voltage through the power chip, and then supplies it to the various chips of the temperature acquisition unit.

[0054] The A / D conversion module 2-5 is the data conversion station of the temperature acquisition unit. The analog signal collected by the temperature sensor is converted into a digital signal through the A / D conversion module 2-5 and then transmitted to the second MCU module 2-3.

[0055] Sensor 2-6 is the temperature acquisition end of the temperature acquisition unit. It converts the temperature into an analog value through a high-precision temperature sensor and then transmits it to the A / D conversion module 2-5.

[0056] like Figure 2As shown, the temperature storage sub 1 and temperature acquisition unit 2 are clamped to the outside of the oil (drill) pipe 4 by a mounting base 5 and a clamp 6, respectively. A guide cone 3 is provided at one end of the oil (drill) pipe 4. The temperature acquisition unit 2 is directly opposite the temperature measurement section. Taking into account the measurement section, the structure of the oil (drill) pipe string, and other downhole factors, the upper and lower positions of the temperature storage sub 1 and temperature acquisition unit 2 are not fixed and can be flexibly interchanged. The specific operation process includes:

[0057] 1) According to the operation requirements (i.e. the target well section length where the temperature needs to be measured), select the number of temperature acquisition units and the interval length between each unit, connect the temperature acquisition units in series, and pre-connect them;

[0058] 2) According to the operation requirements, set the temperature sampling rate (sampling time interval) and sampling time, program the temperature storage short section 1 - USB interface, connect to the computer;

[0059] 3) Connect a guide cone 3 below the first oil (drill) pipe entering the well to facilitate the operation of the pipe string and reduce the risk of getting stuck;

[0060] 4) Clamp the temperature storage sub 1 to the outside of the tubing using the upper and lower mounting bases 5, and dock the temperature acquisition unit 2 with the temperature storage sub 1. The temperature acquisition unit 2 is then clamped to the outside of the tubing using the clamp 6 and lowered into the well.

[0061] 4) Then clamp the remaining temperature collection units on the outside of the oil pipe using the clamp 6.

[0062] 5) After the top end of the oil pipe is connected to the oil pipe, the discrete multi-point temperature measuring device is sent into the predetermined test well section through the oil (drill) pipe.

[0063] 5) The discrete multi-point temperature measurement device measures and records the temperature during the entire test process (opening the well, changing the test work system, and shutting in the well, etc.) according to the preset collection procedure.

[0064] 6) After the test is completed, the discrete multi-point temperature measurement device is taken out of the well along with the oil (drill) pipe.

[0065] 7) Download and collect the temperature data of the short section through the computer.

[0066] 8) Use temperature inversion production profile professional analysis software to divide the production layer, determine the casing channeling and leakage, and evaluate the acidizing and fracturing effects.

[0067] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An oilfield downhole storage type multi-point temperature measurement device, characterized in that: include: First MCU module; a communication storage unit, which is bidirectionally electrically connected to the first MCU module; a current and voltage measurement and control unit, the input end of which is bidirectionally electrically connected to the first MCU module and is also electrically connected to the output end of the communication storage unit; A TBUS bus electrically connected to the output end of the current and voltage measurement and control unit; a data receiving module, an input end of which is electrically connected to the TBUS bus, and an output end of which is electrically connected to the first MCU module; Second MCU module; an address receiving module, an input end of which is electrically connected to the TBUS bus, and an output end of which is electrically connected to an input end of the second MCU module; a data loading module, whose input end is electrically connected to the output end of the second MCU module, and whose output end is electrically connected to the TBUS bus; A plurality of temperature measurement units have input ends electrically connected to the TBUS bus.

2. The oilfield downhole storage type multi-point temperature measurement device according to claim 1, characterized in that: Also includes: A power management module is used to supply power to the current and voltage measurement and control unit when the current and voltage measurement and control unit is started.

3. The oilfield downhole storage type multi-point temperature measurement device according to claim 2, characterized in that: The communication storage unit includes: A USB interface, whose input end communicates with the computer and whose output end is bidirectionally electrically connected to the first MCU module; A FLASH storage chip is bidirectionally electrically connected to the first MCU module.

4. The oilfield downhole storage type multi-point temperature measurement device according to claim 3, characterized in that: The current and voltage measurement and control unit includes: a bus control module, the input end of which is electrically connected to the output end of the USB interface, and the output end of which is electrically connected to the input end of the TBUS; a current measurement module, which is bidirectionally electrically connected to the first MCU module; A voltage measurement module is bidirectionally electrically connected to the first MCU module.

5. The oilfield downhole storage type multi-point temperature measurement device according to claim 4, characterized in that: Also includes: A 3.3V power supply module has an input end electrically connected to the output end of the TBUS.

6. The oilfield downhole storage type multi-point temperature measurement device according to claim 5, characterized in that: Also includes: An A / D conversion module, an input end of which is bidirectionally electrically connected to the second MCU module; The sensor module has an input end that is bidirectionally electrically connected to the A / D conversion module.

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