CN110658107A - Foam viscosity measuring device and method - Google Patents
Foam viscosity measuring device and method Download PDFInfo
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- CN110658107A CN110658107A CN201911054325.7A CN201911054325A CN110658107A CN 110658107 A CN110658107 A CN 110658107A CN 201911054325 A CN201911054325 A CN 201911054325A CN 110658107 A CN110658107 A CN 110658107A
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- 239000006260 foam Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 117
- 239000007788 liquid Substances 0.000 claims abstract description 117
- 238000002347 injection Methods 0.000 claims abstract description 96
- 239000007924 injection Substances 0.000 claims abstract description 96
- 239000011148 porous material Substances 0.000 claims abstract description 66
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 230000000007 visual effect Effects 0.000 claims description 59
- 238000004321 preservation Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- 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
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention relates to a foam viscosity measuring device and a method. Including the hole medium model system that is used for simulating the oil reservoir, to the injection system of the injection liquid of hole medium model system injection liquid, gas or foam and to the produced liquid measurement system that produces liquid of hole medium model system carries out the measurement, its characterized in that, the injection system includes: a first injection system for injecting a liquid into the pore media modeling system, a second injection system for injecting a gas into the pore media modeling system, a third injection system for injecting a dosing fluid into the pore media modeling system, the third injection system comprising: a visible piston reservoir for storing fluid media, a constant pressure and constant speed pump for providing a delivery power to the respective fluid media, a camera for filming the visible piston reservoir, the pore media model system comprising: a first capillary and a second capillary. The foam viscosity measuring device and method can simulate oil reservoir conditions to measure the viscosity of foam in a pore medium.
Description
Technical Field
The invention belongs to the technical field of petroleum engineering and processes, relates to a physical simulation device and method for chemical oil displacement research in oil and gas field development technology, and particularly relates to a foam viscosity measurement device and method suitable for a tertiary oil recovery physical simulation experiment.
Background
The main oil reservoir of domestic and foreign oil fields is a sandstone reservoir with high permeability and strong heterogeneity. Through long-term washing of water drive, polymer drive and subsequent water drive, the pore radius and the throat radius of the oil reservoir are increased, and a dominant seepage channel is formed in the oil reservoir, so that the problems of fast water content increase, serious water channeling and the like are caused. Especially, after the Daqing oil field is developed for a long time of sixty years, the heterogeneity of an oil reservoir is very serious, a large number of dominant seepage channels are formed, and in order to keep the continuous stable production and the effective development of the Daqing oil field, an oil extraction method which can block the dominant seepage channels and improve the oil displacement efficiency is urgently needed. The foam fluid has the characteristics of controllable density, high kinematic viscosity, stability when meeting water, defoaming when meeting oil and the like, is widely applied to oil field development, and has remarkable foam plugging performance particularly in the aspects of profile control and water plugging, gas fluidity control and the like. Foam flooding is an important technology for improving the recovery ratio in tertiary oil recovery, and becomes an important technical means in the later development stage of oil fields of various countries in the world at present.
The measurement parameters of the foam system mainly comprise foaming performance, foam stabilizing performance, interfacial tension, foam kinematic viscosity and foam oil displacement effect. The foam system evaluation instrument mainly comprises a foamability and foam stability evaluation instrument, an interfacial tension instrument and a foam physical simulation oil displacement evaluation device. At present, no equipment related to foam kinematic viscosity measurement by simulating oil reservoir pore medium conditions exists, and kinematic viscosity parameters of a foam system can not be measured by simulating oil reservoir and pore medium conditions, so that a foam flooding mechanism is incomplete, and a theoretical basis is lacked in field scheme compilation.
Disclosure of Invention
The invention aims to provide a foam viscosity measuring device which can simulate oil reservoir conditions to measure the kinematic viscosity of foam in a pore medium. The invention also provides a method for measuring the foam viscosity by using the foam viscosity measuring device.
The above object of the present invention is achieved by the following technical solutions: a foam viscosity measuring device comprises a pore medium model system for simulating an oil reservoir, an injection system for injecting liquid, gas or foam into the pore medium model system and a produced liquid metering system for metering produced liquid of the pore medium model system, wherein the injection system comprises:
a first injection system for injecting a liquid into the pore media modeling system,
A second injection system for injecting gas into the pore media modeling system,
A third injection system for injecting a liquid, gas or foam fluid into the pore media modeling system,
the third injection system comprises:
visual piston container I or/and visual piston container II for storing liquid, gas or foam fluid medium,
Constant pressure and constant speed pump for providing conveying power for corresponding liquid, gas or foam fluid medium,
A camera for taking a picture of the visual piston container,
A second camera for shooting the second visual piston container,
the visual piston container I and the visual piston container II are connected with the first injection system, the second injection system and the pore medium model system through pipelines, the bottom of the visual piston container I is connected with the constant-pressure constant-speed pump III through a pipeline, a valve eleven and a valve thirteen, and the bottom of the visual piston container II is connected with the constant-pressure constant-speed pump III through a pipeline, a valve twelve and a valve thirteen.
The third injection system comprises:
a light source for lighting a visible piston container,
A second light source for shooting the visible piston container II and providing illumination,
A liquid volume metering device I for measuring the injection volume of a visible piston container,
A second liquid volume metering device for measuring the injection amount of the visible piston container,
the first light source and the first camera are positioned on two sides of the first visible piston container, and the second light source and the second camera are positioned on two sides of the second visible piston container; the first liquid volume metering device is connected with the bottom of the first visible piston container through a pipeline, a valve fourteen and a valve eleven, and the second liquid volume metering device is connected with the bottom of the second visible piston container through a pipeline, a valve fifteen and a valve twelve.
The first injection system includes: the constant-speed constant-pressure pump I is connected with the bottom of the liquid piston container I through a pipeline and a valve, and the top of the liquid piston container I is sequentially connected with a third injection system and a pore medium model system through the pipeline, the valve II and a one-way valve; the first constant-speed constant-pressure pump is connected with the bottom of a second liquid piston container through a pipeline and a third valve, and the top of the second liquid piston container is sequentially connected with a third injection system and a pore medium model system through a pipeline, a fourth valve and a second one-way valve.
The second injection system comprises: the gas piston container, the gas booster pump, the high-pressure gas cylinder and the constant-speed constant-pressure pump II are connected with the bottom of the gas piston container through a pipeline and a valve five, the high-pressure gas cylinder is connected with the gas booster pump through a pipeline, the gas booster pump is connected with the top of the gas piston container through a pipeline and a valve six, and the top of the body piston container is sequentially connected with the third injection system and the pore medium model system through a pipeline, a valve seven, a back-pressure valve and a one-way valve I.
The pore media model system comprises: an inlet of the first capillary is sequentially connected with a third injection system, a second injection system and a first injection system through a pipeline, a valve sixteen and a pressure sensor I, and an outlet of the first capillary is connected with a liquid extraction metering system through a pipeline, a valve seventeen and a pressure sensor II; the inlet of the capillary tube II is sequentially connected with a third injection system, a first injection system and a second injection system through a pipeline, an eighteen valve and a third pressure sensor, and the outlet of the capillary tube II is connected with a sampling liquid metering system through a pipeline, a nineteen valve and a second pressure sensor.
The produced liquid metering system comprises: the piston container and the constant-speed and constant-pressure pump IV are connected with the bottom of the piston container through a pipeline, and the top of the piston container is connected with the pore medium model system through a pipeline.
The liquid piston container I, the liquid piston container II, the piston container, the visible piston container I, the visible piston container II, the gas piston container and the pore medium model system are in an insulation box, and the constant-speed constant-pressure pump I, the constant-speed constant-pressure pump II, the constant-speed constant-pressure pump III and the constant-speed constant-pressure pump IV are in the insulation box.
The first constant-speed constant-pressure pump, the second constant-speed constant-pressure pump, the third constant-speed constant-pressure pump, the fourth constant-speed constant-pressure pump, the first camera and the second camera are controlled by a computer.
A foam viscosity measuring method, which is operated by a foam viscosity measuring device, comprises the following steps:
the method comprises the following steps: opening the heat preservation box, and setting the temperature of the heat preservation box by a computer; filling a solution into the first liquid piston container and/or the second liquid piston container; setting the pressure value of a back pressure valve, pressurizing the gas in the high-pressure gas cylinder to the pressure value of the back pressure valve through a gas booster pump, feeding the high-pressure gas pressurized to the pressure value of the back pressure valve through a pipeline and a valve six into a gas piston container through a pipeline, filling the gas piston container with the high-pressure gas, and closing the gas booster pump and the valve six; the piston in the piston container is positioned at the top; enabling the pistons in the first visible piston container and the second visible piston container to be located at the top; closing all valves; starting a first constant-speed constant-pressure pump, a second constant-speed constant-pressure pump, a third constant-speed constant-pressure pump and a fourth constant-speed constant-pressure pump;
step two: the computer sets four constant pressure modes of the constant-speed constant-pressure pump to work, and the constant pressure value is the same as the pressure value of the back pressure valve;
step three: opening a first valve, a second valve, a fifth valve, a seventh valve, an eighth valve, a sixteenth valve and a seventeenth valve, setting the first constant-speed constant-pressure pump and the second constant-speed constant-pressure pump to work at constant speeds by a computer, mixing liquid in the first liquid piston container and gas in the gas piston container in a pipeline to form foam, and allowing the foam to enter a first capillary tube, wherein a gas-liquid mixture flowing out of the first capillary tube enters the top of the piston container through the pipeline;
step four: the computer adjusts the pressure value of the constant-speed and constant-pressure pump IV to enable the pressure value of the pressure sensor II to be equal to the pressure value of the back pressure valve; and the computer records the pressure values of the first pressure sensor, the second pressure sensor and the third pressure sensor, and the foam viscosity is calculated through a Poiseue formula.
The invention provides another foam viscosity measuring method which is operated by using a foam viscosity measuring device and comprises the following steps:
the method comprises the following steps: opening the heat preservation box, and setting the temperature of the heat preservation box by a computer; filling a solution into the first liquid piston container and/or the second liquid piston container; setting the pressure value of a back pressure valve, pressurizing the gas in the high-pressure gas cylinder to the pressure value of the back pressure valve through a gas booster pump, feeding the high-pressure gas pressurized to the pressure value of the back pressure valve through a pipeline and a valve six into a gas piston container through a pipeline, filling the gas piston container with the high-pressure gas, and closing the gas booster pump and the valve six; the piston in the piston container is positioned at the top; enabling the pistons in the first visible piston container and the second visible piston container to be located at the top; closing all valves; starting a first constant-speed constant-pressure pump, a second constant-speed constant-pressure pump, a third constant-speed constant-pressure pump and a fourth constant-speed constant-pressure pump;
step two: the computer sets four constant pressure modes of the constant-speed constant-pressure pump to work, and the constant pressure value is the same as the pressure value of the back pressure valve;
in the third step, the operation that the foam simultaneously enters the first capillary and the second capillary comprises the following steps:
(1) opening a first valve, a second valve, a fifth valve, a seventh valve, an eighth valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve and a thirteenth valve, setting the first constant-speed constant-pressure pump and the second constant-speed constant-pressure pump to work at constant speeds by a computer, setting the third constant-speed constant-pressure pump to work at constant speeds, setting the constant pressure of the third constant-speed constant-pressure pump to be the pressure value of a back pressure valve, mixing liquid in a liquid piston container I and gas in a gas piston container in a pipeline to form foam, entering the top of a visible piston container I and the top of a visible piston container II, and controlling the first constant-speed constant-pressure pump and the second constant-pressure pump to stop working and closing all the valves by the computer when the visible piston container I and the;
(2) the computer controls the opening of the first light source and the second light source; the computer control camera I records the volume of foam injected into the capillary tube I in the visible piston container I; the computer controls the camera II to record the volume of the foam injected into the capillary tube II in the visible piston container II;
(3) opening a valve nine, a valve eleven, a valve twelve, a valve thirteen, a valve sixteen, a valve seventeen, a valve eighteen and a valve nineteen, controlling a constant-speed constant-pressure pump three to work at a constant speed by a computer, allowing foam in a visible piston container I to enter a capillary tube I, allowing foam in a visible piston container II to enter a capillary tube II, and allowing a gas-liquid mixture flowing out of the capillary tube I and the capillary tube II to enter the top of the piston container through a pipeline;
step four: the computer adjusts the pressure value of the constant-speed and constant-pressure pump IV to enable the pressure value of the pressure sensor II to be equal to the pressure value of the back pressure valve; and the computer records the pressure values of the first pressure sensor, the second pressure sensor and the third pressure sensor, and the foam viscosity is calculated through a Poiseue formula.
Step five: after the experiment is finished, enabling the liquid at the bottom of the piston in the first visible piston container to flow into the first liquid volume metering device through the pipeline, the eleventh valve and the fourteenth valve to measure the volume; and enabling the liquid at the bottom of the piston in the visible piston container II to flow into the liquid volume metering device II through the pipeline, the valve twelve and the valve fifteen for volume measurement.
By adopting the technical scheme, the invention has the technical effects that: according to the invention, the long capillary is adopted to simulate the oil reservoir pore medium, so that the consistency of the oil reservoir pore medium is ensured to be simulated under different experimental conditions, and guarantee is provided for evaluating the viscosity performance of a foam system; the third injection system is adopted to measure the injection amount of the pore media with different permeabilities under the same injection pressure, so that the viscosity of the foam in different pore media under the same injection pressure is measured, and quantitative injection parameters can be provided for the simultaneous injection of the pore media with different permeabilities; the constant-speed constant-pressure pump and the piston container are adopted to work in a matched mode, so that the working stability of the device under the high-pressure condition is guaranteed, and the experimental control precision is improved; the invention adopts the operation of each component in the computer control device, and has high control precision and automation degree.
Drawings
FIG. 1 is a schematic view of the structure of the foam viscosity measuring apparatus of the present invention.
In the figure: a1: constant-speed constant-pressure pump one, a 2: constant-speed constant-pressure pump two, a 3: constant-speed constant-pressure pump three, a 4: constant-speed constant-pressure pump four, B1: liquid piston container one, B2: liquid piston container two, C: piston container, D1: visual piston container one, D2: visual piston container two, E1: capillary one, E2: capillary two, F1: liquid volume metering device one, F2: liquid volume metering device two, G1: gas piston container, G2: gas booster pump, G3: high-pressure gas cylinder, H1: one-way valve one, H2: one-way valve two, J1: pressure sensor one, J2: pressure sensor two, J3: pressure sensor three, K: back pressure valve, L1: camera one, L2: a second camera, M: insulation can, N: computer, P1: light source one, P2: light source two, T1-T19: valves one to nineteen.
Detailed Description
The foam viscosity measuring device and method of the present invention will be described in detail below with reference to the accompanying drawings and specific examples.
Example 1
As shown in fig. 1, an embodiment of the foam viscosity measuring apparatus of the present invention is an apparatus for measuring the viscosity of foam in a pore medium by simulating the reservoir conditions, and includes a pore medium model system for simulating the reservoir, an injection system for injecting liquid, gas or foam into the pore medium model system, and a produced fluid metering system for metering the produced fluid in the pore medium model portion.
The pore medium model system in the embodiment is used for simulating the pore medium of the oil reservoir, the inlet of the pore medium model system is connected with the first injection system, the second injection system and/or the third injection system, and the outlet of the pore medium model system is connected with the produced liquid metering system. The pore medium model can be capillary one E1 or/and capillary two E2, the inlet of capillary one E1 is connected with the first injection system, the second injection system and the third injection system in sequence through a pipeline, a valve sixteen T16 and a pressure sensor one J1, and the outlet of capillary one E1 is connected with the sampling liquid metering system through a pipeline, a valve seventeen T17 and a pressure sensor two J2; the inlet of the second capillary E2 is sequentially connected with a third injection system, a first injection system and a second injection system through a pipeline, a valve eighteen T18 and a pressure sensor three J3, and the outlet of the second capillary E2 is connected with a produced liquid metering system through a pipeline, a valve nineteen T19 and a pressure sensor two J2.
The inner diameter of the first capillary E1 or the second capillary E2 of the pore medium model is 0.5-2.5 mm, and the length of the first capillary E1 or the second capillary E2 is 5-15 m. The pore medium model can also be an artificial rock core or a sand filling pipe, the diameter of the artificial rock core is 2.5-3.8 cm, the length of the artificial rock core is 30-100 cm, the inner diameter of the sand filling pipe is 2.5-3.8 cm, the length of the sand filling pipe is 80-150 cm, and the capillary tube, the artificial rock core or the sand filling pipe is used for simulating pore media of different oil reservoirs.
The produced liquid metering system in the embodiment comprises a piston container C and a constant-speed constant-pressure pump four A4, wherein the constant-speed constant-pressure pump four A4 is connected with the bottom of the piston container C through a pipeline, and the top of the piston container C is connected with a pore medium model system through a pipeline. The constant-speed constant-pressure pump and the piston container are adopted to work in a matched mode, so that produced liquid can continuously and stably flow out of the pore medium model system under the high-pressure condition, and stable base pressure is provided for the injection part.
The injection system in this embodiment includes a first injection system for injecting a liquid into the pore media modeling system, a second injection system for injecting a gas into the pore media modeling system, and a third injection system for injecting a liquid, gas, or foamed fluid into the pore media modeling system.
The first injection system comprises a first liquid piston container B1 and a second liquid piston container B2 for storing liquid media, and a first constant-speed constant-pressure pump A1 for providing conveying power for the corresponding liquid media, wherein the first constant-speed constant-pressure pump A1 is connected with the bottom of the first liquid piston container B1 through a pipeline and a valve T1, the top of the first liquid piston container B1 is sequentially connected with the third injection system and the pore media model system through a pipeline, a second valve T2 and a one-way valve H2, the first constant-speed constant-pressure pump A1 is further connected with the bottom of the second liquid piston container B2 through a pipeline and a third valve T3, and the top of the second liquid piston container B2 is sequentially connected with the third injection system and the pore media model system through a pipeline, a fourth valve T4 and a one-way valve H2.
The second injection system comprises a gas piston container G1 for storing a gas medium, a gas booster pump G2 for boosting the gas medium, a high-pressure gas cylinder G3 for storing the gas medium, and a constant-speed constant-pressure pump II A2 for supplying conveying power to the corresponding gas medium, wherein the constant-speed constant-pressure pump II A2 is connected with the bottom of the gas piston container G1 through a pipeline and a valve five T5, the high-pressure gas cylinder G3 is connected with the gas booster pump G2 through a pipeline, a gas booster pump G2 is connected with the top of the gas piston container G1 through a pipeline and a valve six T6, and the top of the gas piston container G1 is sequentially connected with a third injection system and a pore medium model system through a pipeline, a valve seven T7, a back-pressure valve K and a one.
The third injection system comprises a first visual piston container D1 or/and a second visual piston container D2 for storing liquid, gas or foam fluid media, a constant-pressure constant-speed pump three A3 for providing conveying power for the corresponding liquid, gas or foam fluid media, a first camera L1 for shooting the first visual piston container D1, and a second camera L2 for shooting the second visual piston container D2, wherein the first visual piston container D1, the second visual piston container D2, the constant-pressure constant-speed pump three A3, the first camera L1 and the second camera L2 are matched for metering the volumes of the fluid media in the first visual piston container D1 or/and the second visual piston container D2 in real time under the same injection pressure, and the corresponding accumulated injection amount and real-time injection speed can be obtained.
The top of the visual piston container I D1 is connected with the first injection system and the second injection system respectively through a pipeline, a valve nine T9 and a valve eight T8, and the top of the visual piston container I D1 is connected with the inlet end of a capillary tube I E1 in the pore medium model system through a pipeline, a valve nine T9, a pressure sensor I J1 and a valve sixteen T16; the top of the visual piston container II D2 is respectively connected with the first injection system and the second injection system through a pipeline, a valve ten T10 and a valve eight T8, the top of the visual piston container II D2 is connected with the inlet end of a capillary tube I E1 in the pore medium model system through a pipeline, a valve ten T10, a pressure sensor I J1 and a valve sixteen T16, and the top of the visual piston container II D2 is connected with the inlet end of a capillary tube II E2 in the pore medium model system through a pipeline, a pressure sensor II J2 and a valve eighteen T18; the bottom of the visible piston container I D1 is connected with the constant-pressure constant-speed pump III A3 through a pipeline, a valve eleven T11 and a valve thirteen T13; the bottom of the visible piston container II D2 is connected with the constant-pressure constant-speed pump III A3 through a pipeline, a valve twelve T12 and a valve thirteen T13.
In order to increase the metering accuracy of the third injection system, the third injection system further comprises a first light source P1 for shooting the first visual piston container D1 to provide illumination, a second light source P2 for shooting the second visual piston container D2 to provide illumination, a first liquid volume metering device F1 for measuring the injection amount of the first visual piston container D1 and a second liquid volume metering device F2 for measuring the injection amount of the second visual piston container D2, wherein the light source is used for improving the real-time recording definition of the camera and improving the metering fluid volume accuracy, and the liquid volume metering device is used for measuring the accumulated fluid injection amount of the visual piston container at the end of the experiment and correcting the accumulated fluid injection amount recorded by the camera.
Scales can be arranged on the side surfaces of the first visual piston container D1 and the second visual piston container D2, and the foam volume can be measured by matching with the first light source P1, the first camera L1, the second light source P2 and the second camera L2, so that the measuring accuracy is improved.
The first light source P1 and the first camera L1 are positioned at two sides of the first visible piston container D1, and the second light source P2 and the second camera L2 are positioned at two sides of the second visible piston container D2; the first liquid volume metering device F1 is connected with the bottom of the first visual piston container D1 through a pipeline, a valve fourteen T14 and a valve eleven T11, and the second liquid volume metering device F2 is connected with the bottom of the second visual piston container D2 through a pipeline, a valve fifteen T15 and a valve twelve T12.
In a third injection system consisting of a computer N, a first light source P1, a second light source P2, a first camera L1, a second camera L2, a first visual piston container D1, a second visual piston container D2 and a third constant-speed constant-pressure pump A3, the first visual piston container D1 and the second visual piston container D2 respectively measure real-time flow rate and accumulated flow rate flowing into a first capillary E1 and a second capillary E2 under the same injection pressure of the third constant-speed constant-pressure pump A3, so that the inlet respectively measures the real-time flow rate and the accumulated flow rate of different capillaries or cores under the same injection pressure condition, and the adoption of outlet measurement is avoided, and errors are caused by the difference of reserves in the capillaries or cores under different pressures. The measuring precision of the foam is improved.
In order to keep the working temperature of the device constant, a first liquid piston container B1, a second liquid piston container B2, a piston container C, a first visual piston container D1, a second visual piston container D2, a gas piston container G1 and a pore medium model system are arranged in an insulation box M, and pump body parts of a first constant-speed constant-pressure pump A1, a second constant-speed constant-pressure pump A2, a third constant-speed constant-pressure pump A3 and a fourth constant-speed constant-pressure pump A4 are arranged in the insulation box M. The pressure resistance of each part and pipeline of the device is more than 30MPa, and the device is resistant to acid and alkali corrosion; the heating temperature of the constant temperature box M is 25-180 ℃.
In the embodiment, the first constant-speed constant-pressure pump A1, the second constant-speed constant-pressure pump A2, the third constant-speed constant-pressure pump A3, the fourth constant-speed constant-pressure pump A4, the first camera L1, the second camera L2, the first light source P1, the second light source P2, the first pressure sensor J1, the second pressure sensor J2, the third pressure sensor J3 and the heat preservation box M are all electrically connected to the computer N in a control mode, and the computer N sets working parameters of all the parts and controls all the parts to work according to set programs.
The foam viscosity measuring method is carried out by adopting the device, and comprises the following steps:
the method comprises the following steps: opening the heat preservation box M, and setting the temperature of the heat preservation box M by the computer N; filling the first liquid piston container B1 and/or the second liquid piston container B2 with a solution; setting the pressure value of a back pressure valve K, pressurizing the gas in a high-pressure gas bottle G3 to the pressure value of the back pressure valve K through a gas booster pump G2, enabling the high-pressure gas pressurized to the pressure value of the back pressure valve K through a gas booster pump G2 to enter a gas piston container G1 through a pipeline and a valve six T6, filling the gas piston container G1 with the high-pressure gas, and closing a gas booster pump G2 and a valve six T6; the piston in the piston container C is positioned at the top; the pistons in the first visual piston container D1 and the second visual piston container D2 are positioned at the top; all valves T1-T19 are closed; starting a first constant-speed constant-pressure pump A1, a second constant-speed constant-pressure pump A2, a third constant-speed constant-pressure pump A3 and a fourth constant-speed constant-pressure pump A4;
step two: the computer N sets a constant-speed constant-pressure pump four A4 constant-pressure mode to work, and the constant pressure value is the same as the pressure value of the back-pressure valve K;
step three: opening a first valve T1, a second valve T2, a fifth valve T5, a seventh valve T7, an eighth valve T8, a sixteenth valve T16 and a seventeenth valve T17, setting a first constant-speed constant-pressure pump A1 and a second constant-speed constant-pressure pump A2 by a computer N to work at constant speed respectively, mixing liquid in a first liquid piston container B1 and gas in a gas piston container G1 in a pipeline to form foam, and enabling the foam to enter a first capillary tube E1, and enabling a gas-liquid mixture flowing out of the first capillary tube E1 to enter the top of a piston container C through the pipeline;
step four: the computer N adjusts the pressure value of the constant-speed constant-pressure pump IV A4 to enable the pressure value of the pressure sensor II J2 to be equal to the pressure value of the back-pressure valve K; the computer N records the pressure values of the pressure sensor one J1, the sensor two J2 and the sensor three J3.
The back pressure control of the method for measuring the foam viscosity controls the pressure of the pressure sensor II J2 to be constant to be the pressure value of the back pressure valve K through the constant-speed constant-pressure pump IV A4, the back pressure control precision is high, the foam injection pressure is stable, and the accurate pressure difference between the inlet and the outlet of the capillary tube is obtained.
Calculation of the viscosity of the foam by poiseThe suye formula and related parameters calculate viscosity. The viscosity is calculated by the formula:
where μ is the viscosity of the fluid, Q is the flow rate of the fluid, L is the length of the capillary, r is the radius of the capillary, Δ P is the difference between the inlet and outlet pressures of the capillary, and K is the capillary constant.
Example 2
The foam viscosity measuring method of the present invention uses the same foam viscosity measuring apparatus as in example 1, and the step of measuring the foam while entering different pore medium models comprises the steps of:
the foam viscosity measuring method of the invention comprises the following steps of measuring foam entering different pore medium models simultaneously:
the method comprises the following steps: opening the heat preservation box M, and setting the temperature of the heat preservation box M by the computer N; filling the first liquid piston container B1 and/or the second liquid piston container B2 with a solution; setting the pressure value of a back pressure valve K, pressurizing the gas in a high-pressure gas bottle G3 to the pressure value of the back pressure valve K through a gas booster pump G2, enabling the high-pressure gas pressurized to the pressure value of the back pressure valve K through a gas booster pump G2 to enter a gas piston container G1 through a pipeline and a valve six T6, filling the gas piston container G1 with the high-pressure gas, and closing a gas booster pump G2 and a valve six T6; the piston in the piston container C is positioned at the top; the pistons in the first visual piston container D1 and the second visual piston container D2 are positioned at the top; all valves T1-T19 are closed; starting a first constant-speed constant-pressure pump A1, a second constant-speed constant-pressure pump A2, a third constant-speed constant-pressure pump A3 and a fourth constant-speed constant-pressure pump A4;
step two: the computer N sets a constant-speed constant-pressure pump four A4 constant-pressure mode to work, and the constant pressure value is the same as the pressure value of the back-pressure valve K;
step three:
(1) opening a first valve T1, a second valve T2, a fifth valve T5, a seventh valve T7, an eighth valve T8, a ninth valve T9, a tenth valve T10, an eleventh valve T11, a twelfth valve T12 and a thirteenth valve T13, setting a first constant-speed pump A1 and a second constant-speed pump A2 to work at constant speeds respectively by a computer N, working the third constant-speed pump in a constant-pressure mode, enabling the constant pressure of the third constant-speed pump to be the pressure value of a back-pressure valve K, mixing liquid in a first liquid piston container B1 and gas in a gas piston container G1 in a pipeline to form foam, entering the tops of a first visible piston container D1 and a second visible piston container D2, and controlling the first constant-speed pump A1 and the second constant-speed pump A2 to stop working when the foam is filled in the first visible piston container D1 and the second visible piston container D2, and closing all the valves T1-T19;
(2) the computer N controls the first light source P1 and the second light source P2 to be turned on; the computer N controls the camera I L1 to record the volume of foam in the visual piston container I D1 injected into the capillary tube I E1; the computer N controls the camera II L2 to record the volume of the foam in the visible piston container II D2 injected into the capillary tube II E2;
(3) opening a valve nine T9, a valve eleven T11, a valve twelve T12, a valve thirteen T13, a valve sixteen T16, a valve seventeen T17, a valve eighteen T18 and a valve nineteen T19, controlling a constant-speed constant-pressure pump three A3 to work at a constant speed by a computer N, enabling foam in a visible piston container I D1 to enter a capillary tube I E1, enabling foam in a visible piston container II D2 to enter a capillary tube II E2, and enabling a gas-liquid mixture flowing out of the capillary tube I E1 and the capillary tube II E2 to enter the top of a piston container C through a pipeline;
step four: the computer N adjusts the pressure value of the constant-speed constant-pressure pump IV A4 to enable the pressure value of the pressure sensor II J2 to be equal to the pressure value of the back-pressure valve K; the computer N records the pressure values of the pressure sensor one J1, the sensor two J2 and the sensor three J3.
Step five: after the experiment is finished, the liquid at the bottom of the piston in the visual piston container I D1 flows into a liquid volume metering device I F1 through a pipeline, a valve eleven T11 and a valve fourteen T14 to measure the volume; the liquid at the bottom of the piston in the visual piston container two D2 flows into the liquid volume metering device two F2 through a pipeline, a valve twelve T12 and a valve fifteen T15 to measure the volume.
And (4) calculating the viscosity of the foam by virtue of a Poiseub formula and related parameters. The viscosity is calculated by the formula:
where μ is the viscosity of the fluid, Q is the flow rate of the fluid, L is the length of the capillary, r is the radius of the capillary, Δ P is the difference between the inlet and outlet pressures of the capillary, and K is the capillary constant.
It will be understood by those skilled in the art that these examples or embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention, and that various equivalent modifications and changes may be made to the present invention without departing from the spirit of the present disclosure.
Claims (10)
1. A foam viscosity measuring device comprises a pore medium model system for simulating an oil reservoir, an injection system for injecting liquid, gas or foam into the pore medium model system, and a produced liquid metering system for metering the produced liquid of the pore medium model system, and is characterized in that the injection system comprises:
a first injection system for injecting a liquid into the pore media modeling system,
A second injection system for injecting gas into the pore media modeling system,
A third injection system for injecting a liquid, gas or foam fluid into the pore media modeling system,
the third injection system comprises:
a first visual piston container (D1) or/and a second visual piston container (D2) for storing a liquid, gas or foam fluid medium,
Constant-pressure constant-speed pumps for supplying conveying power to respective liquid, gaseous or foamed fluid media (A3),
A first camera (L1) for photographing the first visual piston container (D1),
A second camera (L2) for photographing the second visual piston container (D2),
wherein the first visual piston container (D1), the second visual piston container (D2), the third constant-pressure constant-speed pump (A3), the first camera (L1) and the second camera (L2) are matched, the tops of the first visual piston container (D1) and the second visual piston container (D2) are connected with the first injection system, the second injection system and the pore medium model system through pipelines, the bottom of the first visual piston container (D1) is connected with the third constant-pressure constant-speed pump (A3) through a pipeline, a valve eleven (T11) and a valve thirteen (T13), and the bottom of the second visual piston container (D2) is connected with the third constant-pressure constant-speed pump (A3) through a pipeline, a valve twelve (T12) and a valve thirteen (T13).
2. The foam viscosity measuring device of claim 1, wherein the third injection system comprises:
a first light source (P1) for photographing a first visible piston container (D1) and providing illumination,
A second light source (P2) for lighting the second visible piston container (D2),
A first liquid volume metering device (F1) for measuring the filling quantity of a visible piston container (D1),
A second liquid volume metering device (F2) for measuring the injection amount of the second visible piston container (D2),
wherein the first light source (P1) and the first camera (L1) are positioned at two sides of the first visible piston container (D1), and the second light source (P2) and the second camera (L2) are positioned at two sides of the second visible piston container (D2); the first liquid volume metering device (F1) is connected with the bottom of the first visible piston container (D1) through a pipeline, a valve fourteen (T14) and a valve eleven (T11), and the second liquid volume metering device (F2) is connected with the bottom of the second visible piston container (D2) through a pipeline, a valve fifteen (T15) and a valve twelve (T12).
3. The foam viscosity measuring device of claim 1, wherein the first injection system comprises: the constant-speed constant-pressure pump comprises a first liquid piston container (B1), a second liquid piston container (B2) and a first constant-speed constant-pressure pump (A1), wherein the first constant-speed constant-pressure pump (A1) is connected with the bottom of the first liquid piston container (B1) through a pipeline and a valve (T1), and the top of the first liquid piston container (B1) is sequentially connected with a third injection system and a pore medium model system through a pipeline, a valve II (T2) and a one-way valve (H2); the first constant-speed constant-pressure pump (A1) is connected with the bottom of a second liquid piston container (B2) through a pipeline and a valve III (T3), and the top of the second liquid piston container (B2) is sequentially connected with a third injection system and a pore medium model system through a pipeline, a valve IV (T4) and a one-way valve II (H2).
4. The foam viscosity measuring device of claim 1, wherein the second injection system comprises: gas piston container (G1), gas booster pump (G2), high-pressure gas cylinder (G3) and constant speed constant pressure pump two (A2), gas piston container (G1) bottom is connected through pipeline and valve five (T5) to constant speed constant pressure pump two (A2), gas booster pump (G2) is passed through the pipe connection in high pressure gas cylinder (G3), gas booster pump (G2) passes through pipeline and valve six (T6) connection gas piston container (G1) top, third injection system and pore medium model system are connected in proper order through pipeline, valve seven (T7), backpressure valve (K) and check valve (H1) in body piston container (G1) top.
5. The foam viscosity measuring device of claim 1, wherein the pore media model system comprises: the first capillary (E1) or/and the second capillary (E2), wherein the inlet of the first capillary (E1) is connected with the third injection system, the first injection system and the second injection system in sequence through a pipeline, a valve sixteen (T16) and a pressure sensor I (J1); the outlet of the capillary tube I (E1) is connected with a production liquid metering system through a pipeline, a valve seventeen (T17) and a pressure sensor II (J2); the inlet of the second capillary (E2) is sequentially connected with a third injection system, a first injection system and a second injection system through a pipeline, a valve eighteen (T18) and a pressure sensor III (J3), and the outlet of the second capillary (E2) is connected with a produced liquid metering system through a pipeline, a valve nineteen (T19) and a pressure sensor II (J2).
6. The foam viscosity measuring device of claim 1, wherein the production fluid metering system comprises: a piston container (C) and a constant-speed constant-pressure pump four (A4), wherein the constant-speed constant-pressure pump four (A4) is connected with the bottom of the piston container (C) through a pipeline, and the top of the piston container (C) is connected with a pore medium model system through a pipeline.
7. The foam viscosity measuring device according to any one of claims 1 to 6, wherein the first liquid piston container (B1), the second liquid piston container (B2), the piston container (C), the first visible piston container (D1), the second visible piston container (D2), the gas piston container (G1) and the pore medium model system are in an insulated box (M), and the pump body parts of the first constant pressure pump (A1), the second constant pressure pump (A2), the third constant pressure pump (A3) and the fourth constant pressure pump (A4) are in the insulated box (M).
8. Foam viscosity measuring device according to any of claims 1 to 6, characterized in that the constant speed constant pressure pump one (A1), constant speed constant pressure pump two (A2), constant speed constant pressure pump three (A3), constant speed constant pressure pump four (A4), camera one (L1) and camera two (L2) are controlled by a computer (N).
9. A foam viscosity measuring method operating with the foam viscosity measuring apparatus according to any one of claims 1 to 8, comprising the steps of:
the method comprises the following steps: opening the heat preservation box (M), and setting the temperature of the heat preservation box (M) by the computer (N); filling the first liquid piston container (B1) and/or the second liquid piston container (B2) with a solution; setting the pressure value of a back pressure valve (K), pressurizing gas in a high-pressure gas bottle (G3) to the pressure value of the back pressure valve (K) through a gas booster pump (G2), enabling the high-pressure gas pressurized to the pressure value of the back pressure valve (K) through a gas booster pump (G2) to enter a gas piston container (G1) through a pipeline and a valve six (T6), filling the gas piston container (G1) with the high-pressure gas, and closing a gas booster pump (G2) and the valve six (T6); the piston in the piston container (C) is positioned at the top; the pistons in the first visual piston container (D1) and the second visual piston container (D2) are positioned at the top; closing all valves (T1-T19); starting a first constant-speed constant-pressure pump (A1), a second constant-speed constant-pressure pump (A2), a third constant-speed constant-pressure pump (A3) and a fourth constant-speed constant-pressure pump (A4);
step two: the computer (N) sets a constant-speed constant-pressure pump IV (A4) to work in a constant-pressure mode, and the constant pressure value is the same as the pressure value of the back-pressure valve (K);
step three: opening a first valve (T1), a second valve (T2), a fifth valve (T5), a seventh valve (T7), an eighth valve (T8), a sixteenth valve (T16) and a seventeenth valve (T17), setting a first constant-speed constant-pressure pump (A1) and a second constant-speed constant-pressure pump (A2) to work at constant speed by a computer (N), mixing liquid in a first liquid piston container (B1) and gas in a gas piston container (G1) in a pipeline to form foam, and enabling the foam to enter a first capillary tube (E1), and enabling a gas-liquid mixture flowing out of the first capillary tube (E1) to enter the top of a piston container (C) through the pipeline;
step four: the computer (N) adjusts the pressure value of the constant-speed constant-pressure pump IV (A4) to enable the pressure value of the pressure sensor II (J2) to be equal to the pressure value of the back-pressure valve (K); the computer (N) records the pressure values of the first pressure sensor (J1), the second pressure sensor (J2) and the third pressure sensor (J3), and calculates the foam viscosity through Poiseub's formula.
10. A foam viscosity measuring method operating with the foam viscosity measuring apparatus according to any one of claims 1 to 8, comprising the steps of:
the method comprises the following steps: opening the heat preservation box (M), and setting the temperature of the heat preservation box (M) by the computer (N); filling the first liquid piston container (B1) and/or the second liquid piston container (B2) with a solution; setting the pressure value of a back pressure valve (K), pressurizing gas in a high-pressure gas bottle (G3) to the pressure value of the back pressure valve (K) through a gas booster pump (G2), enabling the high-pressure gas pressurized to the pressure value of the back pressure valve (K) through a gas booster pump (G2) to enter a gas piston container (G1) through a pipeline and a valve six (T6), filling the gas piston container (G1) with the high-pressure gas, and closing a gas booster pump (G2) and the valve six (T6); the piston in the piston container (C) is positioned at the top; the pistons in the first visual piston container (D1) and the second visual piston container (D2) are positioned at the top; closing all valves (T1-T19); starting a first constant-speed constant-pressure pump (A1), a second constant-speed constant-pressure pump (A2), a third constant-speed constant-pressure pump (A3) and a fourth constant-speed constant-pressure pump (A4);
step two: the computer (N) sets a constant-speed constant-pressure pump IV (A4) to work in a constant-pressure mode, and the constant pressure value is the same as the pressure value of the back-pressure valve (K);
step three, the operation that the foam simultaneously enters a capillary I (E1) and a capillary II (E2) comprises the following steps:
(1) opening a first valve (T1), a second valve (T2), a fifth valve (T5), a seventh valve (T7), an eighth valve (T8), a ninth valve (T9), a tenth valve (T10), an eleventh valve (T11), a twelfth valve (T12) and a thirteenth valve (T13), setting a first constant-speed constant-pressure pump (A1) and a second constant-speed constant-pressure pump (A2) to work at constant speeds respectively by a computer (N), working a third constant-speed constant-pressure pump (A3) in a constant-pressure mode, mixing the liquid in the first liquid piston container (B1) and the gas in the gas piston container (G1) in a pipeline to form foam, entering the tops of the first visible piston container (D1) and the second visible piston container (D2), and calculating a first constant-speed constant-pressure pump (N) to stop working the first constant-speed constant-pressure pump (A1) and the second constant-speed constant-pressure pump (N13), closing all valves (T1-T19);
(2) the computer (N) controls the first light source (P1) and the second light source (P2) to be turned on; the computer (N) controls the camera I (L1) to record the injection volume of the foam in the visible piston container I (D1) into the capillary tube I (E1); the computer (N) controls a second camera (L2) to record the volume of foam injected into the second capillary tube (E2) in the visible second piston container (D2);
(3) opening a valve nine (T9), a valve eleven (T11), a valve twelve (T12), a valve thirteen (T13), a valve sixteen (T16), a valve seventeen (T17), a valve eighteen (T18) and a valve nineteen (T19), controlling a constant-speed constant-pressure pump three (A3) to work at a constant speed by a computer (N), visually enabling foam in a piston container I (D1) to enter a capillary tube I (E1), visually enabling foam in a piston container II (D2) to enter a capillary tube II (E2), and enabling a gas-liquid mixture flowing out of the capillary tube I (E1) and the capillary tube II (E2) to enter the top of the piston container (C) through a pipeline;
step four: the computer (N) adjusts the pressure value of the constant-speed constant-pressure pump IV (A4) to enable the pressure value of the pressure sensor II (J2) to be equal to the pressure value of the back-pressure valve (K); the computer (N) records the pressure values of the first pressure sensor (J1), the second pressure sensor (J2) and the third pressure sensor (J3), and the foam viscosity is calculated through the Poisea formula;
step five: after the experiment is finished, the liquid at the bottom of the piston in the visible piston container I (D1) flows into the liquid volume metering device I (F1) through a pipeline, a valve eleven (T11) and a valve fourteen (T14) to measure the volume; the liquid at the bottom of the piston in the visible piston container two (D2) flows into the liquid volume metering device two (F2) through a pipeline, a valve twelve (T12) and a valve fifteen (T15) to measure the volume.
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