Method, device and equipment for measuring rheological property of underground drilling fluid in real time and medium

Abstract

The invention discloses an underground drilling fluid rheological property real-time measurement method, device and equipment and a medium, and relates to the technical field of petroleum drilling, and the method comprises the steps: obtaining underground drilling measurement parameters, and carrying out the temperature calculation of the drilling measurement parameters through a thermocouple single-bridge circuit, so as to obtain the temperature; performing flow velocity calculation on the drilling measurement parameters based on a Hall sensor to obtain a flow velocity, and performing pressure difference calculation on the drilling measurement parameters by using a piezoresistor bridge according to the flow velocity to obtain a static pressure difference and a dynamic pressure difference; performing pressure calculation on the well drilling measurement parameters by using a piezoresistor single-bridge circuit to obtain pressure; and performing viscosity calculation on the static pressure difference, the dynamic pressure difference and the flow velocity to obtain the viscosity of the underground drilling fluid under the conditions of temperature and pressure, and determining a real-time measurement result of the rheological property of the drilling fluid according to the viscosity. By means of the technical scheme, real-time measurement of the rheological property of the underground drilling fluid can be achieved, and the accuracy and efficiency of real-time measurement of the rheological property of the drilling fluid are improved.

Description

Technical Field

[0001] This invention relates to the field of oil drilling technology, and in particular to a method, apparatus, equipment and medium for real-time measurement of the rheological properties of downhole drilling fluid. Background Technology

[0002] Current drilling fluid rheological measurements are all conducted on the surface. Conventional drilling fluid rheological measuring instruments can only test the rheological properties of drilling fluids at normal temperature and atmospheric pressure. However, in actual downhole conditions, pressure and temperature are present, and downhole temperature is dynamically changing. Existing surface-based drilling fluid rheometers capable of measuring high-temperature and high-pressure drilling fluids cannot match the actual downhole pressure and temperature, and therefore cannot reflect the true downhole drilling fluid rheological properties.

[0003] As can be seen from the above, how to achieve real-time measurement of drilling fluid rheology in downhole and improve the accuracy and efficiency of real-time drilling fluid rheology measurement is a problem to be solved in this field. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method, apparatus, equipment, and medium for real-time measurement of downhole drilling fluid rheology, which can realize real-time measurement of downhole drilling fluid rheology and improve the accuracy and efficiency of real-time drilling fluid rheology measurement. The specific solution is as follows:

[0005] In a first aspect, this application discloses a real-time measurement method for downhole drilling fluid rheology, applied to a drilling fluid rheology measurement section, comprising:

[0006] The drilling measurement parameters downhole are obtained, and the temperature is calculated using a thermocouple single-bridge circuit.

[0007] The flow rate is calculated based on the Hall sensor to obtain the flow velocity. The pressure difference is then calculated based on the flow velocity and using a piezoresistive bridge to obtain the static pressure difference and dynamic pressure difference.

[0008] The pressure is calculated by using a single-bridge circuit with a piezoresistive resistor to obtain the pressure from the drilling measurement parameters.

[0009] Viscosity is calculated based on the static pressure difference, the dynamic pressure difference, and the flow velocity to obtain the viscosity of the drilling fluid downhole under the conditions of the temperature and pressure. The rheological properties of the drilling fluid are then determined in real time based on the viscosity.

[0010] Optionally, the drilling fluid rheology measurement sub includes a sub housing, multiple piezoresistors, a cover plate, a circuit board compartment, an impeller, and a Hall sensor.

[0011] Optionally, the step of using a thermocouple single-bridge circuit to calculate the temperature of the drilling measurement parameters includes:

[0012] A single-bridge thermocouple circuit is constructed based on thermocouples to determine the temperature measurement voltage from the drilling measurement parameters;

[0013] The temperature is calculated using the thermocouple single-bridge circuit to measure the temperature voltage.

[0014] Optionally, the step of calculating the flow velocity based on the drilling measurement parameters using a Hall sensor to obtain the flow velocity includes:

[0015] The rotor frequency of the impeller is determined from the drilling measurement parameters;

[0016] The product between the rotor frequency and the preset flow velocity coefficient is calculated using a Hall sensor, and the product is used as the flow velocity.

[0017] Optionally, the step of calculating the pressure difference based on the flow velocity and using a piezoresistive bridge to calculate the drilling measurement parameters to obtain the static pressure difference and dynamic pressure difference includes:

[0018] Determine whether the flow velocity is zero. If the flow velocity is zero, use a piezoresistive bridge to calculate the pressure difference of the drilling measurement parameters to obtain the static pressure difference.

[0019] Repeat the process of acquiring drilling measurement parameters and calculating flow rate until the flow rate is not zero, and then calculate the dynamic pressure difference of the drilling fluid.

[0020] Optionally, the step of using a piezoresistive bridge to calculate the differential pressure of the drilling measurement parameters includes:

[0021] A varistor bridge is constructed based on varistors to determine the differential pressure measurement voltage from the drilling measurement parameters;

[0022] The differential pressure is calculated using a varistor bridge circuit to measure the differential pressure.

[0023] Optionally, the viscosity calculation of the static pressure difference, the dynamic pressure difference, and the flow velocity includes:

[0024] Viscosity is calculated using a preset viscosity calculation formula based on static pressure difference, dynamic pressure difference, and flow velocity; the viscosity calculation formula is:

[0025] ;

[0026] in, Viscosity, Where is the viscosity coefficient, and d is the diameter of the drilling fluid rheology measurement sub. For dynamic pressure difference, Where L is the static pressure difference, L is the spacing between the varistor bridges, and Q is the flow velocity.

[0027] Secondly, this application discloses a downhole drilling fluid rheology real-time measurement device, applied to a drilling fluid rheology measurement subsection, comprising:

[0028] The temperature calculation module is used to acquire downhole drilling measurement parameters and perform temperature calculations on the drilling measurement parameters using a thermocouple single-bridge circuit to obtain the temperature.

[0029] The flow velocity and differential pressure calculation module is used to calculate the flow velocity based on the drilling measurement parameters using a Hall sensor to obtain the flow velocity, and to calculate the differential pressure based on the flow velocity using a piezoresistive bridge to obtain the static differential pressure and dynamic differential pressure.

[0030] The pressure calculation module is used to calculate the pressure of the drilling measurement parameters using a single-bridge circuit with a piezoresistive resistor, so as to obtain the pressure.

[0031] The rheological measurement module is used to calculate the viscosity of the drilling fluid downhole under the conditions of the static pressure difference, the dynamic pressure difference, and the flow velocity, so as to obtain the viscosity of the drilling fluid under the conditions of the temperature and the pressure, and determine the real-time rheological measurement result of the drilling fluid based on the viscosity.

[0032] Thirdly, this application discloses an electronic device, comprising:

[0033] Memory, used to store computer programs;

[0034] A processor is used to execute the computer program to implement the aforementioned method for real-time measurement of downhole drilling fluid rheology.

[0035] Fourthly, this application discloses a computer storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the aforementioned disclosed method for real-time measurement of downhole drilling fluid rheology.

[0036] As can be seen, this application provides a method for real-time measurement of the rheological properties of downhole drilling fluid, including acquiring downhole drilling measurement parameters; calculating the temperature of the drilling measurement parameters using a thermocouple single-bridge circuit to obtain the temperature; calculating the flow velocity of the drilling measurement parameters based on a Hall sensor to obtain the flow velocity; calculating the pressure difference of the drilling measurement parameters based on the flow velocity and using a piezoresistive bridge to obtain the static pressure difference and dynamic pressure difference; calculating the pressure of the drilling measurement parameters using a piezoresistive single-bridge circuit to obtain the pressure; calculating the viscosity of the drilling fluid under the conditions of the static pressure difference, the dynamic pressure difference, and the flow velocity to obtain the viscosity of the downhole drilling fluid under the conditions of the temperature and the pressure; and determining the real-time measurement result of the rheological properties of the drilling fluid based on the viscosity. This application utilizes a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to calculate drilling measurement parameters such as temperature, flow rate, differential pressure, and pressure. This yields the temperature, flow rate, static differential pressure, dynamic differential pressure, and pressure. Viscosity is then calculated to obtain the drilling fluid viscosity under the given temperature and pressure conditions, enabling real-time measurement of drilling fluid rheology. Furthermore, this application, applied to drilling fluid rheology measurement subsections, leverages a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to counteract the influence of temperature on the piezoresistive resistor, reducing the operational complexity of real-time drilling fluid rheology measurement and improving its accuracy and efficiency, thereby enhancing cuttings transport efficiency and drilling efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 This is a flowchart of a method for real-time measurement of the rheological properties of downhole drilling fluid disclosed in this application;

[0039] Figure 2 This is a mechanical structure diagram of a drilling fluid rheology measurement sub disclosed in this application;

[0040] Figure 3 This is a schematic diagram of a wire hole disclosed in this application;

[0041] Figure 4 This is a schematic diagram of the measurement circuit for a drilling fluid rheology measurement sub-section disclosed in this application;

[0042] Figure 5 This is a schematic diagram of a downhole drilling fluid rheology real-time measurement device disclosed in this application.

[0043] Figure 6 This application provides a structural diagram of an electronic device. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Current drilling fluid rheological measurements are all conducted on the surface. Conventional drilling fluid rheological measuring instruments can only test the rheological properties of drilling fluids at normal temperature and atmospheric pressure. However, in actual downhole conditions, pressure and temperature are present, and downhole temperature is dynamically changing. Existing surface-based drilling fluid rheometers capable of measuring high-temperature and high-pressure drilling fluids cannot match the actual downhole pressure and temperature, and therefore cannot reflect the true downhole drilling fluid rheological properties. Therefore, how to achieve real-time downhole drilling fluid rheological measurement and improve the accuracy and efficiency of such measurements is a problem that needs to be solved in this field.

[0046] See Figure 1 As shown, this embodiment of the invention discloses a real-time measurement method for downhole drilling fluid rheology, applied to a drilling fluid rheology measurement section, specifically including:

[0047] Step S11: Obtain the drilling measurement parameters downhole, and use a thermocouple single-bridge circuit to calculate the temperature of the drilling measurement parameters.

[0048] This application is applied to a drilling fluid rheology measurement sub, which includes a sub housing, multiple piezoresistors, a cover plate, a circuit board compartment, an impeller, and a Hall sensor.

[0049] The mechanical structure of the drilling fluid rheology measurement sub is as follows: Figure 2As shown, it comprises both mechanical and electrical parts. The short section mechanical structure includes a short section shell, which is a hollow cylinder with a length of 0.5m to 5m, a diameter of 50mm to 800mm, and an inner diameter of 8mm to 760mm. The upper and lower ends have threaded joints. Inside the shell, the upper part houses piezoresistors 1 and 4, with chambers 2 and 10 positioned at 90° to the central axis. The lower part houses two piezoresistors 2 and 3, with chambers 6 and 9 also positioned at 90° to the central axis. The distance between the upper and lower parts is 0.2m to 4.5m. Piezoresistors 1, 2, 3, and 4 form a bridge circuit for measuring the differential pressure of the drilling fluid. The middle section houses piezoresistor 5, chamber 4, for measuring the drilling fluid pressure. The contact area between the varistor housing and the external drilling fluid uses a thin metal film, which is welded to the housing. The varistor housing is filled with a pressure-conducting colloid to transmit drilling fluid pressure to the varistor. A circuit board compartment is located in the center of the housing and is sealed with a cover plate. The cover plate has through holes around its perimeter and is fixed to the housing with screws. A sealing ring is placed between the cover plate and the housing.

[0050] The lower part of the housing houses a rotatable impeller, consisting of blades and a central hollow cylinder. The blades and cylinder are at a certain angle, allowing the impeller to rotate as drilling fluid flows through. The impeller also possesses a certain magnetic property to activate the Hall sensor. The impeller is mounted on a support frame within the housing via the central hollow cylinder. The support frame has a central cylinder for mounting the impeller, with four thin cylinders above and below it. These cylinders fix the central cylinder to the housing and are perpendicular to the central cylinder, ensuring fluid flow and minimizing disturbance. The impeller is positioned at least 100mm away from the bottom pressure-sensitive resistor to avoid interference with pressure measurement. A Hall sensor compartment is located next to the impeller; the Hall sensor activates when the impeller approaches.

[0051] Small holes are drilled between the varistor compartment, the Hall sensor compartment, and the circuit board compartment for wire connections. Grooves are cut into the side wall of the housing to facilitate drilling, sealed with a cover plate. Through holes are drilled around the cover plate, which is fixed to the housing with screws. A sealing ring is placed between the cover plate and the housing. Varistor compartments 9 and 10 have wire holes drilled at a 45° angle to the circuit board compartment, and the circuit board compartment has wire holes drilled to varistor compartments 9 and 10. The two wire holes intersect and conduct in the middle. Variable resistors, the circuit board compartment, and the Hall sensor compartment all have wire holes drilled directly to the circuit board compartment. A schematic diagram of the wire holes is shown below. Figure 3 As shown.

[0052] The measurement circuit of the short section proposed in this application mainly includes temperature measurement, differential pressure measurement, and flow measurement circuits. A schematic diagram of the measurement circuit is shown below. Figure 4 As shown, this application achieves temperature measurement and calculation through a short-section measurement circuit.

[0053] For example, to obtain downhole drilling measurement parameters, a thermocouple single-bridge circuit is constructed based on thermocouples. The temperature measurement voltage is determined from the drilling measurement parameters, and the temperature is calculated using the thermocouple single-bridge circuit. Specifically, the temperature measurement uses a single-bridge circuit composed of thermocouples. The input voltage is a reference voltage source, which amplifies the weak voltage output signal of the bridge circuit through a two-stage amplification circuit consisting of an instrumentation amplifier and an operational amplifier. The voltage value is then obtained through analog-to-digital conversion, and the microprocessor calculates the temperature using the following formula:

[0054] ;

[0055] Where T is temperature. Here, a, b, and c represent the temperature measurement voltage and the temperature T, respectively. The polynomial coefficients.

[0056] Step S12: Calculate the flow velocity based on the Hall sensor to obtain the flow velocity, and calculate the pressure difference based on the flow velocity using a piezoresistive bridge to obtain the static pressure difference and dynamic pressure difference.

[0057] In this embodiment, the calculation process for static pressure difference is as follows: a varistor bridge is constructed based on varistors, and the pressure difference measurement voltage is determined from the drilling measurement parameters; the pressure difference is calculated using the varistor bridge to obtain the static pressure difference. Specifically, the pressure difference measurement uses a bridge composed of four varistors to offset the influence of temperature. The input voltage is a reference voltage generated by a reference voltage source, and then the weak voltage output signal of the bridge is amplified by a two-stage amplification circuit consisting of an instrumentation amplifier and an operational amplifier. The voltage value is then obtained through analog-to-digital conversion, and the microprocessor calculates the static pressure difference and dynamic pressure difference using the following formula:

[0058] ;

[0059] in, Pressure difference, including static pressure difference and dynamic pressure difference. The voltage for differential pressure measurement is given by e, f, and g, where e, f, and g represent the differential pressure. With differential pressure measurement voltage The polynomial coefficients.

[0060] In this embodiment, the rotor frequency of the impeller is determined from the drilling measurement parameters. The product between the rotor frequency and the preset flow velocity coefficient is calculated using a Hall sensor, and the product is used as the flow velocity. It is then determined whether the flow velocity is zero. If the flow velocity is zero, a pressure difference is calculated using a piezoresistive bridge to obtain the static pressure difference. The process of obtaining drilling measurement parameters and calculating flow velocity is repeated until the flow velocity is not zero, and then the dynamic pressure difference of the drilling fluid is calculated.

[0061] The flow velocity calculation process is as follows: the flow velocity measurement microprocessor measures the rotor frequency f of the impeller by counting and collecting the on / off state of the Hall sensor, and then calculates the flow velocity using the following formula: Q=Kf, where K is the flow coefficient.

[0062] The flow rate is used to determine whether drilling fluid is circulating. If the flow rate is 0, the drilling fluid is not circulating. The density of the drilling fluid is then calculated, and the static pressure difference when the drilling fluid is not circulating is taken. The distance between the upper and lower sensors is L, and the density calculation formula is as follows:

[0063] ;

[0064] Repeat the process of acquiring drilling measurement parameters and calculating flow velocity until the flow velocity is not zero, and then calculate the dynamic pressure difference during drilling fluid circulation. .

[0065] Step S13: Use a piezoresistive single-bridge circuit to calculate the pressure of the drilling measurement parameters to obtain the pressure.

[0066] In this embodiment, pressure measurement uses a single-bridge circuit composed of a pressure-sensitive resistor 5. The input voltage is a reference voltage source, which generates a reference voltage. The weak voltage output signal of the bridge is then amplified by a two-stage amplification circuit consisting of an instrumentation amplifier and an operational amplifier. The voltage value is then obtained through analog-to-digital conversion, and the microprocessor calculates the pressure using the following formula:

[0067] ;

[0068] Where P is pressure, Here, h, i, and j represent the pressure P and the pressure measuring voltage, respectively. The coefficients of the polynomial.

[0069] Step S14: Calculate the viscosity of the static pressure difference, the dynamic pressure difference, and the flow rate to obtain the viscosity of the drilling fluid in the well under the conditions of the temperature and pressure, and determine the real-time rheological measurement result of the drilling fluid based on the viscosity.

[0070] In this embodiment, a preset viscosity calculation formula is used to calculate the viscosity of the drilling fluid downhole under the conditions of static pressure difference, dynamic pressure difference, and flow velocity, so as to obtain the viscosity of the drilling fluid under the conditions of the stated temperature and pressure; the viscosity calculation formula is:

[0071] ;

[0072] in, Viscosity, Where is the viscosity coefficient, and d is the diameter of the drilling fluid rheology measurement sub. For dynamic pressure difference, Where L is the static pressure difference, L is the spacing between the varistor bridges, and Q is the flow velocity.

[0073] Furthermore, the entire sub-section proposed in this application can measure temperature, pressure, drilling fluid flow rate, and drilling fluid rheology. It can be placed at the bottom of the well to measure the drilling fluid rheology under high temperature and high pressure conditions, or multiple sub-sections can be placed to measure the drilling fluid rheology throughout the wellbore, providing a reliable basis for drilling fluid rheology optimization.

[0074] The innovation of this application lies in its ability to obtain real-time drilling fluid rheological measurement results under pressure and temperature conditions by calculating temperature, flow rate, pressure and viscosity of downhole drilling measurement parameters. Furthermore, this application utilizes a piezoresistive bridge to obtain high-precision bottom hole pressure differential, which can counteract the effect of temperature on the piezoresistive resistor.

[0075] In this embodiment, downhole drilling measurement parameters are acquired. Temperature is calculated using a thermocouple single-bridge circuit. Flow velocity is calculated based on a Hall sensor. Differential pressure is calculated using a piezoresistive bridge circuit based on the flow velocity to obtain static and dynamic differential pressure. Pressure is calculated using a piezoresistive single-bridge circuit to obtain pressure. Viscosity is calculated using the static differential pressure, dynamic differential pressure, and flow velocity to obtain the viscosity of the downhole drilling fluid under the given temperature and pressure conditions. The rheological properties of the drilling fluid are then determined based on the viscosity. This application utilizes a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to calculate drilling measurement parameters such as temperature, flow rate, differential pressure, and pressure. This yields the temperature, flow rate, static differential pressure, dynamic differential pressure, and pressure. Viscosity is then calculated to obtain the drilling fluid viscosity under the given temperature and pressure conditions, enabling real-time measurement of drilling fluid rheology. Furthermore, this application, applied to drilling fluid rheology measurement subsections, leverages a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to counteract the influence of temperature on the piezoresistive resistor, reducing the operational complexity of real-time drilling fluid rheology measurement and improving its accuracy and efficiency, thereby enhancing cuttings transport efficiency and drilling efficiency.

[0076] See Figure 5 As shown, this embodiment of the invention discloses a downhole drilling fluid rheological real-time measurement device, applied to a drilling fluid rheological measurement section, specifically including:

[0077] Temperature calculation module 11 is used to acquire downhole drilling measurement parameters and perform temperature calculation on the drilling measurement parameters using a thermocouple single-bridge circuit to obtain the temperature;

[0078] The flow velocity and pressure difference calculation module 12 is used to calculate the flow velocity based on the drilling measurement parameters using a Hall sensor to obtain the flow velocity, and to calculate the pressure difference based on the flow velocity using a piezoresistive bridge to obtain the static pressure difference and dynamic pressure difference.

[0079] The pressure calculation module 13 is used to calculate the pressure of the drilling measurement parameters using a single-bridge circuit with a pressure-sensitive resistor to obtain the pressure.

[0080] The rheological measurement module 14 is used to calculate the viscosity of the drilling fluid downhole under the conditions of the static pressure difference, the dynamic pressure difference, and the flow velocity, so as to obtain the viscosity of the drilling fluid under the conditions of the temperature and the pressure, and determine the real-time rheological measurement result of the drilling fluid based on the viscosity.

[0081] In this embodiment, downhole drilling measurement parameters are acquired. Temperature is calculated using a thermocouple single-bridge circuit. Flow velocity is calculated based on a Hall sensor. Differential pressure is calculated using a piezoresistive bridge circuit based on the flow velocity to obtain static and dynamic differential pressure. Pressure is calculated using a piezoresistive single-bridge circuit to obtain pressure. Viscosity is calculated using the static differential pressure, dynamic differential pressure, and flow velocity to obtain the viscosity of the downhole drilling fluid under the given temperature and pressure conditions. The rheological properties of the drilling fluid are then determined based on the viscosity. This application utilizes a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to calculate drilling measurement parameters such as temperature, flow rate, differential pressure, and pressure. This yields the temperature, flow rate, static differential pressure, dynamic differential pressure, and pressure. Viscosity is then calculated to obtain the drilling fluid viscosity under the given temperature and pressure conditions, enabling real-time measurement of drilling fluid rheology. Furthermore, this application, applied to drilling fluid rheology measurement subsections, leverages a thermocouple single-bridge circuit, a Hall sensor, a piezoresistive bridge, and a piezoresistive single-bridge circuit to counteract the influence of temperature on the piezoresistive resistor, reducing the operational complexity of real-time drilling fluid rheology measurement and improving its accuracy and efficiency, thereby enhancing cuttings transport efficiency and drilling efficiency.

[0082] In some specific embodiments, the drilling fluid rheology measurement sub includes a sub housing, multiple piezoresistors, a cover plate, a circuit board compartment, an impeller, and a Hall sensor.

[0083] In some specific embodiments, the temperature calculation module 11 may specifically include:

[0084] A thermocouple single-bridge circuit construction module is used to construct a thermocouple single-bridge circuit based on thermocouples and determine the temperature measurement voltage from the drilling measurement parameters;

[0085] The temperature calculation module is used to calculate the temperature of the temperature measurement voltage using the thermocouple single-bridge circuit.

[0086] In some specific embodiments, the flow rate and pressure difference calculation module 12 may specifically include:

[0087] A rotor frequency determination module is used to determine the rotor frequency of the impeller from the drilling measurement parameters;

[0088] The flow rate calculation module is used to calculate the product between the rotor frequency and the preset flow rate coefficient using a Hall sensor, and to use the product as the flow rate.

[0089] In some specific embodiments, the flow rate and pressure difference calculation module 12 may specifically include:

[0090] The static pressure difference calculation module is used to determine whether the flow velocity is zero. If the flow velocity is zero, the pressure difference is calculated on the drilling measurement parameters using a piezoresistive bridge to obtain the static pressure difference.

[0091] The dynamic pressure difference calculation module is used to repeatedly execute the process of acquiring drilling measurement parameters and calculating flow rate until the flow rate is not zero, and then calculate the dynamic pressure difference of the drilling fluid.

[0092] In some specific embodiments, the flow rate and pressure difference calculation module 12 may specifically include:

[0093] A varistor bridge construction module is used to construct a varistor bridge based on varistors to determine the differential pressure measurement voltage from the drilling measurement parameters;

[0094] The differential pressure calculation module is used to calculate the differential pressure of the measured voltage using a varistor bridge.

[0095] In some specific embodiments, the rheological measurement module 14 may specifically include:

[0096] The viscosity calculation module is used to calculate the viscosity based on static pressure difference, dynamic pressure difference, and flow velocity using a preset viscosity calculation formula; the viscosity calculation formula is:

[0097] ;

[0098] in, Viscosity, Where is the viscosity coefficient, and d is the diameter of the drilling fluid rheology measurement sub. For dynamic pressure difference, Where L is the static pressure difference, L is the spacing between the varistor bridges, and Q is the flow velocity.

[0099] Figure 6 This is a schematic diagram of an electronic device provided in an embodiment of this application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 stores a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the real-time measurement method for downhole drilling fluid rheology disclosed in any of the foregoing embodiments.

[0100] In this embodiment, the power supply 23 is used to provide operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows can be any communication protocol applicable to the technical solution of this application, and is not specifically limited here; the input / output interface 25 is used to acquire external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs, and is not specifically limited here.

[0101] In addition, the memory 22, as a carrier for resource storage, can be a read-only memory, random access memory, disk or optical disk, etc. The resources stored thereon include operating system 221, computer program 222 and data 223, etc., and the storage method can be temporary storage or permanent storage.

[0102] The operating system 221 manages and controls the various hardware devices on the electronic device 20 and the computer program 222 to enable the processor 21 to perform calculations and processing on the data 223 in the memory 22. It can be Windows, Unix, Linux, etc. The computer program 222, in addition to including a computer program capable of performing the real-time measurement method of downhole drilling fluid rheology disclosed in any of the foregoing embodiments, may further include computer programs capable of performing other specific tasks. The data 223 may include data received by the downhole drilling fluid rheology real-time measurement device from external devices, as well as data collected by its own input / output interface 25.

[0103] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0104] Furthermore, this application also discloses a computer-readable storage medium storing a computer program. When the computer program is loaded and executed by a processor, it implements the steps of the real-time measurement method for downhole drilling fluid rheology disclosed in any of the foregoing embodiments.

[0105] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0106] The present invention provides a detailed description of a method, apparatus, device, and storage medium for real-time measurement of the rheological properties of downhole drilling fluid. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for real-time measurement of the rheological properties of downhole drilling fluid, characterized in that, Short sections used for drilling fluid rheological measurement include: The drilling measurement parameters downhole are obtained, and the temperature is calculated using a thermocouple single-bridge circuit. The flow rate is calculated based on the Hall sensor to obtain the flow velocity. The pressure difference is then calculated based on the flow velocity and using a piezoresistive bridge to obtain the static pressure difference and dynamic pressure difference. The pressure is calculated by using a single-bridge circuit with a piezoresistive resistor to obtain the pressure from the drilling measurement parameters. Viscosity is calculated based on the static pressure difference, the dynamic pressure difference, and the flow velocity to obtain the viscosity of the drilling fluid downhole under the conditions of the temperature and pressure. The rheological properties of the drilling fluid are then determined in real time based on the viscosity.

2. The method for real-time measurement of downhole drilling fluid rheology according to claim 1, characterized in that, The drilling fluid rheology measurement subsection includes a subsection housing, multiple piezoresistors, a cover plate, a circuit board compartment, an impeller, and a Hall sensor.

3. The method for real-time measurement of downhole drilling fluid rheology according to claim 1, characterized in that, The method of calculating the temperature of the drilling measurement parameters using a thermocouple single-bridge circuit includes: A single-bridge thermocouple circuit is constructed based on thermocouples to determine the temperature measurement voltage from the drilling measurement parameters; The temperature is calculated using the thermocouple single-bridge circuit to measure the temperature voltage.

4. The method for real-time measurement of downhole drilling fluid rheology according to claim 1, characterized in that, The process of calculating the flow velocity based on the drilling measurement parameters using a Hall sensor to obtain the flow velocity includes: The rotor frequency of the impeller is determined from the drilling measurement parameters; The product between the rotor frequency and the preset flow velocity coefficient is calculated using a Hall sensor, and the product is used as the flow velocity.

5. The method for real-time measurement of downhole drilling fluid rheology according to claim 1, characterized in that, The step of calculating the pressure difference based on the flow velocity and using a piezoresistive bridge to calculate the drilling measurement parameters, to obtain the static pressure difference and dynamic pressure difference, includes: Determine whether the flow velocity is zero. If the flow velocity is zero, use a piezoresistive bridge to calculate the pressure difference of the drilling measurement parameters to obtain the static pressure difference. Repeat the process of acquiring drilling measurement parameters and calculating flow rate until the flow rate is not zero, and then calculate the dynamic pressure difference of the drilling fluid.

6. The method for real-time measurement of downhole drilling fluid rheology according to claim 5, characterized in that, The calculation of differential pressure for the drilling measurement parameters using a piezoresistive bridge includes: A varistor bridge is constructed based on varistors to determine the differential pressure measurement voltage from the drilling measurement parameters; The differential pressure is calculated using a varistor bridge circuit to measure the differential pressure.

7. The method for real-time measurement of downhole drilling fluid rheology according to any one of claims 1 to 6, characterized in that, The viscosity calculation for the static pressure difference, the dynamic pressure difference, and the flow velocity includes: Viscosity is calculated using a preset viscosity calculation formula based on static pressure difference, dynamic pressure difference, and flow velocity; the viscosity calculation formula is: ； in, Viscosity, Where is the viscosity coefficient, and d is the diameter of the drilling fluid rheology measurement sub. For dynamic pressure difference, Where L is the static pressure difference, L is the spacing between the varistor bridges, and Q is the flow velocity.

8. A real-time measurement device for the rheological properties of downhole drilling fluid, characterized in that, Short sections used for drilling fluid rheological measurement include: The temperature calculation module is used to acquire downhole drilling measurement parameters and perform temperature calculations on the drilling measurement parameters using a thermocouple single-bridge circuit to obtain the temperature. The flow velocity and differential pressure calculation module is used to calculate the flow velocity based on the drilling measurement parameters using a Hall sensor to obtain the flow velocity, and to calculate the differential pressure based on the flow velocity using a piezoresistive bridge to obtain the static differential pressure and dynamic differential pressure. The pressure calculation module is used to calculate the pressure of the drilling measurement parameters using a single-bridge circuit with a piezoresistive resistor, so as to obtain the pressure. The rheological measurement module is used to calculate the viscosity of the drilling fluid downhole under the conditions of the static pressure difference, the dynamic pressure difference, and the flow velocity, so as to obtain the viscosity of the drilling fluid under the conditions of the temperature and the pressure, and determine the real-time rheological measurement result of the drilling fluid based on the viscosity.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor for executing the computer program to implement the real-time measurement method for downhole drilling fluid rheology as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Used to store computer programs; wherein, when the computer programs are executed by a processor, they implement the real-time measurement method for downhole drilling fluid rheology as described in any one of claims 1 to 7.

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