CN111878059B - Downhole fluid viscometer with injection profile by capillary method and combined logging instrument thereof - Google Patents
Downhole fluid viscometer with injection profile by capillary method and combined logging instrument thereof Download PDFInfo
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- CN111878059B CN111878059B CN202010818736.5A CN202010818736A CN111878059B CN 111878059 B CN111878059 B CN 111878059B CN 202010818736 A CN202010818736 A CN 202010818736A CN 111878059 B CN111878059 B CN 111878059B
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- 239000012530 fluid Substances 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 18
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 9
- 239000003208 petroleum Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005213 imbibition Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012667 polymer degradation Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
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Abstract
The invention relates to the technical field of petroleum logging instruments, in particular to a capillary injection profile downhole fluid viscometer and a combined logging instrument thereof. The viscometer comprises a liquid suction cavity outer cylinder, wherein the inner cavity of the liquid suction cavity outer cylinder is a liquid suction cavity, and a capillary tube, a second pressure sensor and a second temperature sensor are arranged at one end part of the liquid suction cavity; a unidirectional liquid suction piston is arranged in the liquid suction cavity and connected with a piston rod, and the piston rod axially penetrates through two end parts of the outer cylinder of the liquid suction cavity; the piston rod pushes the unidirectional liquid suction piston to move left and right; the other end part of the liquid suction cavity is connected with a motor outer cylinder through a first sealing short circuit, and a motor is arranged in the motor outer cylinder; the end of the liquid suction cavity outer cylinder, which is close to the mounting capillary tube, is provided with a second sealing short circuit which is connected with the viscosity circuit. The capillary injection profile downhole fluid viscometer and the combined logging instrument thereof provided by the invention have the characteristics of high viscosity measurement precision and strong timeliness, and solve the problem that the conventional downhole sampling quantity is limited by the quantity of the cavities of the sampler.
Description
Technical Field
The invention relates to the technical field of petroleum logging instruments, in particular to a capillary injection profile downhole fluid viscometer and a combined logging instrument thereof.
Background
The polymer flooding has wide application in domestic main oil fields, the polymer viscosity is closely related to the flooding efficiency, and the polymer flooding has important significance for improving the recovery ratio of the oil fields. At present, the viscosity of the fluid in the well of the injection well is measured mainly by sampling the fluid in the well, then carrying out surface test on the sample, combining the surface pressure and the reservoir temperature, and obtaining the viscosity of the fluid by correlation correction calculation. Currently, the viscosity measurement of the surface fluid mainly comprises a capillary method, a falling ball method and a rotary column method. The ball falling method and the rotary column method are required to be equipped with precise measuring equipment, and meanwhile, precise mechanical movement of parts exists in the measuring process, so that the method is difficult to realize underground; the capillary method has certain application in the surface viscosity measurement, but because the underground polymer has high elasticity at high concentration, belongs to non-Newtonian fluid, the viscosity is influenced by conditions such as underground flow velocity, temperature, pressure, mineralization degree and the like, and the underground viscosity measurement is under high temperature and high pressure conditions, the problems of suction and unidirectional movement of liquid to be measured need to be solved, so various capillary viscosimeters applied to the surface at present cannot be directly used underground.
Disclosure of Invention
First, the technical problem to be solved
The invention provides a capillary injection profile downhole fluid viscometer and a combined logging instrument thereof, which are used for overcoming the defects of small sampling quantity, poor compliance of ground viscosity test of sampled liquid and downhole practical conditions and the like in a fluid sampling method in the prior art.
(II) technical scheme
To solve the above problems, in one aspect, the present invention provides a capillary injection profile downhole fluid viscometer, comprising:
the liquid suction cavity outer cylinder is provided with a liquid suction cavity in the inner cavity, and a capillary tube, a second pressure sensor and a second temperature sensor are arranged at one end part of the liquid suction cavity;
the second pressure sensor is used for measuring pressure parameters in the liquid suction cavity; the second temperature sensor is used for measuring temperature parameters in the liquid suction cavity;
calculating according to the parameters of the capillary tube and the pressure parameters through a formula to obtain the viscosity of the liquid to be measured;
a unidirectional liquid suction piston is arranged in the liquid suction cavity and connected with a piston rod, and the piston rod axially penetrates through two end parts of the outer cylinder of the liquid suction cavity; the piston rod pushes the unidirectional liquid suction piston to move left and right;
the other end part of the liquid suction cavity is connected with a motor outer cylinder through a first sealing short circuit, a motor is arranged in the motor outer cylinder, the motor is connected with a coupler, the coupler is connected with a screw rod, and the motor drives the coupler and the screw rod to rotate together;
a first O-shaped sealing ring is arranged in the first sealing short circuit; the first sealing short joint is provided with a liquid inlet, and liquid to be measured in the shaft enters the liquid suction cavity outer cylinder through the liquid inlet;
the end of the liquid suction cavity outer cylinder, which is close to the mounting capillary tube, is provided with a second sealing short circuit, and the second sealing short circuit is connected with a viscosity circuit.
Preferably, the viscosity circuit comprises a downhole direct current power supply, a signal acquisition and motor drive control circuit, a voltage identification module and a voltage stabilizing circuit module;
the second pressure sensor and the second temperature sensor are electrically connected with the viscosity circuit, the viscosity circuit is used for collecting a second pressure signal and a second temperature signal, and the two signals enter the first singlechip after being processed by the AD45 and the AD 46;
the voltage identification module and the voltage stabilizing circuit module are used for controlling the starting of the motor and the voltage stabilization of the power supply of the motor, and ensuring uniform motion of the unidirectional liquid suction piston.
Preferably, the left side and the right side of the unidirectional liquid suction piston are respectively provided with a main piston and a secondary piston with different outer diameters, the diameter of the main piston is smaller than that of the secondary piston, and a group of array flow passages are circumferentially arranged at the radial position of the secondary piston.
Preferably, a second O-shaped ring is arranged at the middle groove position between the main piston and the auxiliary piston in the unidirectional liquid suction piston.
Preferably, the viscosity calculation formula is specifically:
wherein eta is the viscosity of the fluid, R is the inner radius of the capillary, deltaP is the pressure difference between two ends of the capillary, L is the length of the capillary, and Q is the extrusion flow.
On the other hand, the invention also provides a combined logging instrument for measuring viscosity, which is characterized by comprising four telemetering parameters, a centralizer and the capillary injection profile downhole fluid viscometer;
the four telemetering parameters are positioned at the uppermost part of the combined instrument and are responsible for completing the measurement of underground temperature, pressure and magnetic positioning parameters; the viscometer is connected with the four telemetering parameters through threads, and the centralizer is positioned at the lowest position.
Preferably, the centralizer comprises a supporting rod, an upper joint, an upper fixing ring, four centralizer sheets and a lower fixing ring;
the four centralizer sheets are surrounded on the periphery of the supporting rod through an upper fixing ring and a lower fixing ring; the upper joint is connected with the viscometer through threads.
Preferably, the four telemetry parameters comprise a telemetry circuit, a magnetic positioning module, a first temperature sensor and a first pressure sensor, wherein the first pressure sensor and the first temperature sensor are electrically connected with the telemetry circuit and are used for continuously collecting pressure signals and temperature signals of different depths in a well in the well logging process, and the telemetry circuit comprises a module power supply, a temperature measuring circuit, a pressure measuring circuit and a magnetic positioning measuring circuit, and the collected continuous well logging parameters are sent to the second singlechip.
Preferably, the telemetry circuitry is electrically connected to a viscosity circuitry in a capillary injection profile downhole fluid viscometer, the two-part electrical connection employing a four-core connector.
(III) beneficial effects
The capillary injection profile downhole fluid viscometer and the combined logging instrument thereof provided by the invention have the following advantages:
(1) The polymer can be measured in real time under the underground condition by using the capillary method, so that the influence of the viscosity calculated by the ground test of the fluid sampling method on the measurement caused by formation pressure, reservoir temperature, polymer degradation and the like is reduced, and the method has the characteristics of high viscosity measurement precision and strong timeliness.
(2) The liquid suction cavity can repeatedly suck and spray liquid to be detected, the viscosity measurement of a plurality of layers in the well can be completed by one-time descending of the viscometer, and the problem that the conventional underground sampling quantity is limited by the quantity of the cavities of the sampler is solved.
(3) The viscometer is short-circuited and designed with built-in temperature and pressure measuring sensors for measuring the temperature and pressure of fluid in the imbibition cavity, and a four-parameter instrument matched with the temperature and pressure measuring sensors can be used for measuring the temperature, pressure and magnetic positioning parameters of an imbibition cavity outside a well pipe column, and can refer to logging parameters such as temperature, pressure and the like when analyzing the viscosity of the underground polymer, so that comprehensive interpretation can be realized.
(4) In the viscosity measurement process, a pressure gradient curve corresponding to the capillary viscosity measurement and a temperature and pressure fluctuation curve in the pipe column are monitored in real time, retests can be timely conducted on measurement points with well shaft fluctuation and improper sampling, and compared with a sampling assay method, the sampling quality and the one-time well descending success rate are remarkably improved.
Drawings
FIG. 1 is a schematic diagram of a downhole fluid viscometer with a capillary injection profile according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a one-way imbibition piston in a capillary injection profile downhole fluid viscometer according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the overall structure of a combination logging tool according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a telemetry four-parameter architecture according to an embodiment of the present invention;
FIG. 5 is a schematic view of a centralizer according to an embodiment of the invention;
FIG. 6 is a schematic diagram of the electrical circuit of a combination logging tool according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, an embodiment of the present invention provides a capillary injection profile downhole fluid viscometer, specifically including:
a liquid suction cavity outer cylinder 24, wherein the inner cavity of the liquid suction cavity outer cylinder 24 is a liquid suction cavity 25, and a capillary 29, a second pressure sensor 16 and a second temperature sensor 28 are arranged at one end part of the liquid suction cavity 25;
the second pressure sensor 16 is used for measuring a pressure parameter inside the liquid suction cavity 25; the second temperature sensor 28 is used for measuring the temperature parameter inside the liquid suction cavity; the capillary 29 is used for measuring the viscosity of the liquid to be measured; the capillary 29 is made of 304 stainless steel seamless steel pipe, the inner diameter is between 0.5mm and 1mm, and the length is not more than 10cm; viscosity calculations are according to poisson's law: the time required for a certain volume of liquid to pass through the capillary tube under a certain pressure gradient is proportional to the viscosity of laminar flow liquid, and under the condition that the length and the diameter of the capillary tube are determined, the viscosity of the liquid under the temperature condition can be calculated by measuring the flow rate of the liquid and the pressure difference generated by the liquid passing through the capillary tube.
The viscosity calculation is shown in formula 1,
wherein eta is the viscosity of the fluid, R is the inner radius of the capillary, deltaP is the pressure difference between two ends of the capillary, L is the length of the capillary, and Q is the extrusion flow.
A second temperature sensor 28 and a second pressure sensor 16 built in the liquid suction cavity 25, which monitor the temperature and pressure changes of the fluid in the liquid suction cavity 25 for calculating viscosity parameters;
a unidirectional liquid suction piston 15 is arranged in the liquid suction cavity 25, the unidirectional liquid suction piston 15 is connected with a piston rod 14, and the piston rod 14 axially penetrates through two end parts of the liquid suction cavity outer cylinder 24; the piston rod 14 pushes the unidirectional liquid suction piston 15 to move left and right;
the other end part of the liquid suction cavity 25 is connected with a motor outer cylinder 11 through a first sealing short joint 12, a motor 9 is arranged in the motor outer cylinder 11, the motor 9 is connected with a coupler 20, the coupler 20 is connected with a lead screw 10, and the motor 9 drives the coupler 20 and the lead screw 10 to rotate together;
a first O-shaped sealing ring 13 is arranged in the first sealing short circuit 12; the first sealing short joint 12 is provided with a liquid inlet 23, and liquid to be measured in the shaft enters the liquid suction cavity outer cylinder 24 through the liquid inlet 23.
The end part of the liquid suction cavity outer cylinder 24, which is close to the mounting capillary 29, is provided with a second sealing short circuit 17, the second sealing short circuit 17 is connected with a viscosity circuit 18, and the end part of the viscosity circuit 18 is connected with a second protective cap 19; the other end part of the motor outer cylinder 11 is connected with a second tail cap 8;
the viscosity circuit 18 includes a downhole DC power supply 43 and a signal acquisition and motor drive control circuit. The second pressure sensor 16 and the second temperature sensor 28 are electrically connected with the viscosity circuit 18 through a circuit, the viscosity circuit 18 is used for collecting a second pressure signal 41 and a second temperature signal 42, and the two signals enter the first singlechip 46 after being processed by the AD45 and the AD 46.
As shown in fig. 2, the left and right sides of the unidirectional liquid suction piston 15 are respectively provided with a main piston 15-1 and a secondary piston 15-2 with different outer diameters, the diameter of the main piston 15-1 is smaller than that of the secondary piston 15-2, and a group of array flow passages 27 are circumferentially arranged at the radial position of the secondary piston 15-2; a second O-ring 26 is arranged in the unidirectional liquid suction piston 15 at a position of a middle groove between the main piston 15-1 and the auxiliary piston 15-2.
During liquid suction, the driving motor 9 reversely rotates, and drives the screw rod 10, the piston rod 14 and the unidirectional liquid suction piston 15 to move leftwards through the coupler 20. The second O-shaped ring 26 on the groove of the unidirectional liquid suction piston 15 is abutted against the left side of the auxiliary piston 15-2 under the action of friction force with the inner wall 24 of the liquid suction cavity, and as the unidirectional liquid suction piston 15 moves leftwards, the volume of the liquid suction cavity 25 on the right side is increased, the pressure is reduced, and fluid flows into the liquid suction cavity 25 through the liquid inlet 23 of the viscometer, the outer edge on the left side of the main piston 15-1, the inside of the second O-shaped ring 26 and the array flow channel 27 on the radial inside of the auxiliary piston 15-2 in sequence; when the unidirectional liquid suction piston 15 is pushed by the piston rod 14 to move rightwards during injection, the second O-shaped ring 26 is attached to the right side of the main piston 15-1 under the action of friction force, the annular array flow channel 27 on the right side of the unidirectional piston 15 is blocked, the liquid suction cavity 25 on the right side of the unidirectional piston 15 is completely sealed, at the moment, the unidirectional liquid suction piston 15 is pushed continuously, and all liquid in the liquid suction cavity 25 is pushed out from the capillary 29. The pressure and temperature values inside the pipetting chamber 25 are measured before and after pushing the liquid by means of a second pressure sensor 16 and a second temperature sensor 28, respectively, arranged inside the pipetting chamber 25 for subsequent calculation and correction of the viscosity values.
In addition, as shown in fig. 3, the embodiment of the invention further provides a combined logging tool for measuring viscosity, which comprises: the viscometer, the telemetering four parameters and the centralizer.
The four telemetering parameters in the combined logging instrument are positioned at the uppermost part of the combined logging instrument and are responsible for completing the measurement of underground temperature, pressure and magnetic positioning parameters; the viscometer is connected with the telemetering four parameters through threads, and the inside of the mechanical connection is a multi-core connector. When the viscometer measures, the four telemetering parameters are connected with the cable head, then the viscometer and the centralizer are connected in sequence, the instrument is vertically conveyed into the underground target horizon through the logging cable, and power is supplied to the combined instrument through the logging cable.
As shown in fig. 4, the four telemetering parameters sequentially comprise a telemetering circuit 6, a magnetic positioning module 5, a first temperature sensor 3 and a first pressure sensor 2, wherein the end part of the first pressure sensor 2 is connected with a first tail cap 1; the end of the telemetry circuit 6 is connected to a first protective cap 7.
The instrument is used for continuously logging, reflects logging parameters in a shaft, and is electrically connected with a telemetry circuit 6 through a first pressure sensor 2 and a first temperature sensor 3, and is used for continuously collecting pressure signals and temperature signals of different depths in the shaft in the logging process.
As shown in fig. 5, the centralizer is used to ensure that the combined instrument is located in the center of the wellbore, at the lowest of the combined instrument, and is composed of a support rod, an upper joint 33, an upper fixing ring 34, four centralizer sheets 32, a lower fixing ring 31 and a third tail cap 30,
the four centralizer sheets 32 are surrounded on the periphery of the support rod through an upper fixing ring 34 and a lower fixing ring 31; the end part of the lower fixing ring 31 is connected with a third tail cap 30; the upper joint 33 is connected to the viscometer by threads.
Wherein the third tail cap 30 may be coupled with a weighting according to the logging requirements.
As shown in fig. 6, the telemetry circuit 6 includes a module power supply 35, a temperature measurement circuit 36, a pressure measurement circuit 37 and a magnetic positioning measurement circuit 38, and the acquired continuous logging parameters are sent to a second singlechip 39.
The remote sensing circuit 6 is electrically connected with the viscosity circuit 18 in the viscometer, and two parts of the two-part electrical connection are connected by adopting a four-core connector, wherein the first core is a direct current power supply V153 and is responsible for supplying power to the remote sensing circuit 6 and the viscosity circuit 18; the second core TX51 and the third core RX52 are serial signals; the fourth core is a direct current power supply V254 for supplying power to the transmission part of the viscometer.
Wherein serial communication is provided between the telemetry circuit 6 and the viscosity circuit 18, and RX51 and TX52 are respectively a received signal and a transmitted signal. The second singlechip 39 of the telemetry circuit 6 sends address bits at regular time, the viscosity circuit 18 receives the address, the first singlechip 46 sends the second pressure signal 41 and the second temperature signal 42 corresponding to the address to the second singlechip 39 of the telemetry circuit 6 through serial ports (RX 51, TX 52), and the telemetry circuit 6 uploads the acquired second pressure signal 41 and second temperature signal 42 to a ground logging acquisition system in a Mann code mode after passing through the power amplification circuit 40 together with other logging signals acquired in four telemetry parameters.
In addition, the viscosity circuit 18 is also provided with a voltage identification module 48 and a voltage stabilizing circuit module 49, which are responsible for controlling the starting of the motor 9 and the voltage stabilization of the power supply of the motor 9 so as to ensure the uniform motion of the unidirectional liquid suction piston 15. When the instrument is negatively charged, the motor is reversed 50 to work, and the instrument is in a liquid absorption state; when the motor is powered in the forward direction, the telemetry circuit 6 and the viscosity circuit 18 work simultaneously, and after the voltage identification module 48 exceeds a set threshold voltage, the voltage stabilizing circuit module 49 controls the motor to work in the forward direction 47, and keeps the voltage stable so as to ensure the constant spraying speed of the capillary 29. After the viscosity measurement is completed once, the power is reversely supplied to the combiner through the cable, so that the motor is reversely rotated 50 to work, and the liquid at the next measuring point is sucked again.
The above embodiments are only for illustrating the present invention, not for limiting the present invention, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present invention, and therefore, all equivalent technical solutions are also within the scope of the present invention, and the scope of the present invention is defined by the claims.
Claims (6)
1. A capillary injection profile downhole fluid viscometer, comprising:
the liquid suction cavity outer cylinder is provided with a liquid suction cavity in the inner cavity, and a capillary tube, a second pressure sensor and a second temperature sensor are arranged at one end part of the liquid suction cavity;
the second pressure sensor is used for measuring pressure parameters in the liquid suction cavity; the second temperature sensor is used for measuring temperature parameters in the liquid suction cavity;
calculating according to the parameters of the capillary tube and the pressure parameters through a formula to obtain the viscosity of the liquid to be measured;
the viscosity calculation formula specifically comprises:
wherein eta is the viscosity of the fluid, R is the inner radius of the capillary, deltaP is the pressure difference between two ends of the capillary, L is the length of the capillary, and Q is the extrusion flow;
a unidirectional liquid suction piston is arranged in the liquid suction cavity and connected with a piston rod, and the piston rod axially penetrates through two end parts of the outer cylinder of the liquid suction cavity; the piston rod pushes the unidirectional liquid suction piston to move left and right;
the other end part of the liquid suction cavity is connected with a motor outer cylinder through a first sealing short circuit, a motor is arranged in the motor outer cylinder, the motor is connected with a coupler, the coupler is connected with a screw rod, and the motor drives the coupler and the screw rod to rotate together;
a first O-shaped sealing ring is arranged in the first sealing short circuit; the first sealing short joint is provided with a liquid inlet, and liquid to be measured in the shaft enters the liquid suction cavity outer cylinder through the liquid inlet;
the end part of the liquid suction cavity outer cylinder, which is close to the mounting capillary tube, is provided with a second sealing short circuit, and the second sealing short circuit is connected with a viscosity circuit;
the left side and the right side of the unidirectional liquid suction piston are respectively provided with a main piston and an auxiliary piston with different outer diameters, the diameter of the main piston is smaller than that of the auxiliary piston, and a group of array flow passages are circumferentially arranged at the radial position of the auxiliary piston;
and a second O-shaped ring is arranged at the middle groove position between the main piston and the auxiliary piston in the unidirectional liquid suction piston.
2. The capillary injection profile downhole fluid viscometer of claim 1 in which the viscosity circuit includes a downhole dc power supply, signal acquisition and motor drive control circuitry, voltage identification module and voltage stabilization circuit module;
the second pressure sensor and the second temperature sensor are electrically connected with a viscosity circuit, and the viscosity circuit is used for collecting a second pressure signal and a second temperature signal;
the voltage identification module and the voltage stabilizing circuit module are used for controlling the starting of the motor and the voltage stabilization of the power supply of the motor, and ensuring uniform motion of the unidirectional liquid suction piston.
3. A combination viscosity measurement tool comprising a telemetry four parameter, centralizer and a capillary injection profile downhole fluid viscometer according to any one of claims 1-2;
the four telemetering parameters are positioned at the uppermost part of the combined instrument and are responsible for completing the measurement of underground temperature, pressure and magnetic positioning parameters; the viscometer is connected with the four telemetering parameters through threads, and the centralizer is positioned at the lowest position.
4. The measured viscosity combination logging tool of claim 3, wherein the centralizer comprises a support rod, an upper sub, an upper retaining ring, four centralizer sheets, a lower retaining ring;
the four centralizer sheets are surrounded on the periphery of the supporting rod through an upper fixing ring and a lower fixing ring; the upper joint is connected with the viscometer through threads.
5. The measurement viscosity combination logging instrument of claim 4, wherein the four telemetry parameters comprise a telemetry circuit, a magnetic positioning module, a first temperature sensor and a first pressure sensor, wherein the first pressure sensor and the first temperature sensor are electrically connected with the telemetry circuit and are used for continuously collecting pressure signals and temperature signals of different depths in a well in a logging process, the telemetry circuit comprises a module power supply, a temperature measuring circuit, a pressure measuring circuit and a magnetic positioning measuring circuit, and the collected continuous logging parameters are sent to the second singlechip.
6. The combination measured viscosity tool of claim 4, wherein the telemetry circuit is electrically connected to a viscosity circuit in a capillary injection profile downhole fluid viscometer, the two-part electrical connection being a four-core connector.
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2020
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| CN110208145A (en) * | 2011-04-11 | 2019-09-06 | S.P.C.M.股份公司 | The equipment of on-line measurement and control viscosity under a kind of high pressure |
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| CN108663289A (en) * | 2018-03-05 | 2018-10-16 | 中国石油大学(华东) | Under a kind of condition of high voltage liquid CO is measured using capillary2/N2The device and its measurement method of two-phase system viscosity |
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| CN111878059A (en) | 2020-11-03 |
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