CN117664733B - Device and method for testing blocking performance of chemical packer - Google Patents
Device and method for testing blocking performance of chemical packer Download PDFInfo
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- CN117664733B CN117664733B CN202410114614.6A CN202410114614A CN117664733B CN 117664733 B CN117664733 B CN 117664733B CN 202410114614 A CN202410114614 A CN 202410114614A CN 117664733 B CN117664733 B CN 117664733B
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- 239000000126 substance Substances 0.000 title claims abstract description 193
- 238000012360 testing method Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims description 22
- 230000000903 blocking effect Effects 0.000 title claims description 17
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000010998 test method Methods 0.000 claims abstract 2
- 230000000087 stabilizing effect Effects 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 5
- 238000012856 packing Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention discloses a test device and a test method for the plugging performance of a chemical packer, which relate to the technical field of chemical packing tests, wherein a chemical packer inlet used for entering the chemical packer, a chemical packer outlet used for discharging the chemical packer, an oil inlet used for entering test oil and an oil outlet used for discharging the test oil are arranged on a well body component, the chemical packer outlet is communicated with a chemical packer storage tank and used for collecting the chemical packer discharged through the chemical packer outlet, the oil outlet is communicated with the oil storage tank and used for collecting the test oil discharged through the oil outlet, a temperature control instrument is used for controlling the temperature of the test oil in the well body component, a pressure control instrument is used for controlling the pressure of the test oil in the well body component, and the temperature control instrument and the pressure control instrument are electrically connected with each other, and a graduated scale is further arranged on the side wall of the well body component. The invention has simple structure and convenient operation, and can improve the efficiency of the research on the plugging performance of the chemical packer.
Description
Technical Field
The invention relates to the technical field of chemical packing tests, in particular to a device and a method for testing the plugging performance of a chemical packer.
Background
In the middle and later stages of oil field development, the formation energy is reduced, the recovery ratio is correspondingly reduced, and most oil fields begin to supplement the formation energy through water injection so as to improve the recovery ratio. However, the differences in the composition of rock layer substances, rock mineral content and colloid content cause heterogeneity between layers in the oil reservoir layers, so that the permeability of the oil reservoir layer is different from the oil reservoir layer to the oil reservoir layer and from the oil reservoir layer to the water injection layer. The permeability difference enables water injection to enter an oil well prematurely, a dominant channel is formed in an oil reservoir, water injection resistance is reduced, phenomena such as series flow, sudden advance, direct advance and the like are generated in the water injection process, and the recovery ratio is seriously influenced; the original blockage removal of the old channels can also negatively affect the water injection effect, and the channels must be subjected to profile control and water shutoff in order to improve the recovery ratio.
Therefore, the water absorption profile is improved by injecting chemical packers into the stratum, the water injection sweep range is increased, and the method is one of the most effective methods for inhibiting the low-efficiency circulation and improving the oil field development effect. In recent years, the workload of profile control and water shutoff is increased year by year, the working difficulty is increased, the oil increasing potential is reduced, and the situation leads to the increasing requirement on the performance of chemical packers.
At present, chemical packer sealing types are various, researches are wide, core displacement experiments are mostly adopted to evaluate the sealing performance of the chemical packer, experimental operation is slightly complicated, preparation time is long, and repeatability is poor.
Disclosure of Invention
The invention aims to provide a device and a method for testing the plugging performance of a chemical packer, which are used for solving the problems of the prior art, and are simple in structure and convenient to operate, and the efficiency of researching the plugging performance of the chemical packer is improved.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a test device for plugging performance of a chemical packer, which comprises a well body component, a chemical packer storage tank, an oil storage tank, a temperature control instrument, a pressure control instrument and a computer, wherein the well body component is provided with a chemical packer inlet for entering the chemical packer, a chemical packer outlet for discharging the chemical packer, an oil inlet for entering test oil and an oil outlet for discharging the test oil, the chemical packer outlet is communicated with the chemical packer storage tank, the chemical packer storage tank is used for collecting the chemical packer discharged through the chemical packer outlet, the oil outlet is communicated with the oil storage tank, the oil storage tank is used for collecting the test oil discharged through the oil outlet, the temperature control instrument is used for controlling the temperature of the test oil in the well body component, the pressure control instrument is used for controlling the pressure of the test oil in the well body component, the temperature control instrument and the pressure control instrument are electrically connected with the computer, and scales are further arranged on the side wall of the well body component.
Preferably, the well body assembly comprises a derrick, a well bore and a well bore, wherein the well bore is positioned in the well bore, the derrick is connected with the outer wall of the well bore and is used for supporting the well bore, and the graduated scale is positioned on the well bore and can be observed through the outside of the well bore.
Preferably, the chemical packer inlet and the chemical packer outlet are both opened on the side wall of the well bore and are arranged close to the upper half part of the well bore, the chemical packer inlet is higher than the chemical packer outlet, and the chemical packer inlet and the chemical packer outlet are both extended to the outside of the well bore.
Preferably, the oil inlet and the oil outlet are both provided in a side wall of the well bore and are provided close to a lower half of the well bore, the oil inlet is higher than the oil outlet, and the oil inlet and the oil outlet are both extended outside the well bore.
Preferably, a jacket is further arranged between the outer wall of the lower half part of the well body and the inner wall of the well shaft, a medium is introduced into the jacket, a temperature constant-current inlet is arranged on the jacket, the temperature constant-current inlet extends to the outside of the well shaft and is connected with a temperature control instrument, and the temperature control instrument is used for controlling the temperature of the medium in the jacket.
Preferably, a pressure constant flow inlet is arranged on the side wall of the lower half part of the well body, the pressure constant flow inlet extends to the outside of the well body and is connected with a pressure control instrument, and the pressure control instrument is used for introducing gas into the well body through the pressure constant flow inlet to control the pressure of the test oil in the well body.
Preferably, the pressure control instrument is an ISCO plunger pump.
Preferably, a pressure stabilizing valve is arranged between the oil outlet and the oil storage tank.
The invention also provides a method for testing the blocking performance of the chemical packer, which adopts any one of the technical schemes, and comprises the following steps:
s1, installing and fixing a derrick, a shaft and a well body;
s2, opening an oil inlet, closing an oil outlet, putting test oil into the lower half part of the well body through the oil inlet, and closing the oil inlet after the putting is finished;
s3, opening a chemical packer inlet, closing a chemical packer outlet, throwing the chemical packer to be researched into the upper half part in the well through the chemical packer inlet, and closing the chemical packer inlet after throwing is finished;
s4, starting a temperature control instrument, a pressure control instrument and a computer, and confirming that the computer is connected with the temperature control instrument and the pressure control instrument through data lines;
s5, testing the maximum formation pressure which can be born by the chemical packer under a certain constant temperature condition: the pressure control instrument is connected to the pressure constant flow inlet through a pipeline, and parameters of the pressure control instrument are adjusted, so that the pressure control instrument inputs pressure which increases linearly with time to simulate the formation pressure, and whether the layer where the chemical packer is located in the well body is broken through by the formation pressure is observed; checking a chart drawn by a computer, and knowing the specific stratum pressure value born by the chemical packer playing a plugging role under the temperature condition; after the test is finished, opening an outlet of the chemical packer, and discharging the chemical packer to a chemical packer storage tank; the pressure stabilizing valve is regulated, the oil outlet is opened, test oil is discharged to the oil storage tank, and the well body is cleaned, so that the subsequent test is facilitated;
the blocking performance of the chemical packer under investigation under constant pressure and different temperature conditions was tested: comparing the thickness of the stratum where the chemical packer is located with the thickness broken by the stratum pressure through a graduated scale, adjusting parameters of a pressure control instrument to enable the pressure control instrument to provide constant pressure, connecting the temperature control instrument to a temperature constant flow inlet through a pipeline, and controlling the temperature change of test oil; observing a graduated scale and a computer, and recording the breakthrough height of the layer where the chemical packer is located by an oil layer and the corresponding temperature thereof; after the test is finished, opening an outlet of the chemical packer, and discharging the chemical packer to a chemical packer storage tank; the pressure stabilizing valve is regulated, the oil outlet is opened, test oil is discharged to the oil storage tank, and the well body is cleaned, so that the subsequent test is facilitated;
when the plugging performance of different chemical packers on the same test oil under the constant temperature condition is tested: firstly, a chemical packer and test oil are put into the system to carry out a first group of tests, and a pressure change chart in a computer along with time is stored; then opening an outlet of the chemical packer, discharging the chemical packer to a chemical packer storage tank, adjusting a pressure stabilizing valve, opening an oil outlet, discharging test oil to the oil storage tank, and cleaning a well body; performing the next group of tests, adding another chemical packer and the same test oil, checking a computer, and comparing a temperature-pressure change chart with time to obtain the plugging performance evaluation of the different chemical packers on the same test oil; opening a chemical packer outlet, and discharging the chemical packer to a chemical packer reservoir tank; the pressure stabilizing valve is regulated, an oil outlet is opened, test oil is discharged to an oil storage tank, and the well body is cleaned;
s6, waste liquid in the chemical packer storage tank and the oil storage tank is treated according to the specification, the well body is cleaned, the next test is convenient, whether all the inlets and outlets are closed or not is checked, the pressure control instrument and the computer are closed, and the test is ended.
Compared with the prior art, the invention has the following technical effects:
the device and the method for testing the blocking performance of the chemical packer provided by the invention have the advantages of simple structure, convenience in operation, direct observation and good repeatability, can simulate the evaluation of the blocking performance of the chemical packer in an actual stratum, and can more intuitively research the blocking performance of the chemical packer under different pressure or temperature conditions, thereby further improving the efficiency of the research on the blocking performance of the chemical packer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a test apparatus for blocking performance of a chemical packer in accordance with the first embodiment;
in the figure: 1-derrick, 2-well bore, 3-well bore, 4-chemical packer, 5-test oil, 6-scale, 7-chemical packer outlet, 8-chemical packer inlet, 9-oil inlet, 10-temperature constant flow inlet, 11-oil outlet, 12-pressure stabilizing valve, 13-chemical packer reservoir tank, 14-oil reservoir tank, 15-temperature control instrument, 16-pressure control instrument, 17-computer, 18-pressure constant flow inlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a device and a method for testing the plugging performance of a chemical packer, which are used for solving the technical problems that the traditional chemical packer performance research experiment needs time preparation, the operation is complex and the repeatability is poor.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1, the present embodiment provides a test device for blocking performance of a chemical packer, comprising a well body assembly, a chemical packer reservoir tank 13, an oil reservoir tank 14, a temperature control instrument 15, a pressure control instrument 16 and a computer 17, wherein the well body assembly is provided with a chemical packer inlet 8 for the entry of the chemical packer 4, a chemical packer outlet 7 for the discharge of the chemical packer 4, an oil inlet 9 for the entry of test oil 5 and an oil outlet 11 for the discharge of the test oil 5, the chemical packer outlet 7 is communicated with the chemical packer reservoir tank 13, the chemical packer reservoir tank 13 is used for collecting the chemical packer 4 discharged through the chemical packer outlet 7, the oil outlet 11 is communicated with the oil reservoir tank 14, and the oil reservoir tank 14 is used for collecting the test oil 5 discharged through the oil outlet 11, the temperature control instrument 15 is used for controlling the temperature of the test oil 5 in the well body assembly, the pressure control instrument 16 is used for controlling the pressure born by the test oil 5 in the well body assembly, the temperature control instrument 15 and the pressure control instrument 16 are electrically connected with the computer 17, when the computer 17 can record the blocking performance of the chemical packer 4 under study, the pressure and the temperature born by the test oil 5 can be recorded, the blocking performance of the chemical packer 4 under different pressure or temperature conditions can be more intuitively studied, the efficiency of the blocking performance study of the chemical packer 4 is further improved, the side wall of the well body assembly is also provided with the graduated scale 6, and the graduated scale 6 can measure the thickness of the chemical packer 4 under different conditions to play a blocking role, so that the blocking performance is represented. The embodiment has simple integral structure and convenient operation, and simultaneously, different chemical packers 4 and test oil 5 can be put into a well body assembly through the arrangement of the oil inlet 9, the oil outlet 11, the chemical packer inlet 8 and the chemical packer outlet 7, so that the operation is convenient and simple, and the repeatability of the test is realized.
Specifically, the well body assembly comprises a derrick 1, a well shaft 2 and a well body 3, wherein the well body 3 is positioned in the well shaft 2, the derrick 1 is connected with the outer wall of the well shaft 2 and is used for supporting the well shaft 2, so that the well shaft 2 and the well body 3 are perpendicular to the ground, enough space is reserved in the well body 3 for inputting test oil 5 and chemical packers 4, a graduated scale 6 is positioned on the well body 3 and can be observed through the outside of the well body 2, the thickness of different chemical packers 4 when the plugging effect is exerted can be observed through the graduated scale 6 under the condition that the test oil 5, the temperature and the pressure are the same, and the plugging performance of the different chemical packers 4 can be intuitively evaluated.
The chemical packer inlet 8 and the chemical packer outlet 7 are both formed in the side wall of the well bore 3 and are arranged close to the upper half of the well bore 3, the chemical packer inlet 8 is higher than the chemical packer outlet 7, and the chemical packer inlet 8 and the chemical packer outlet 7 are both extended to the outside of the well bore 2.
The oil inlet 9 and the oil outlet 11 are both formed in the side wall of the well bore 3 and are arranged close to the lower half of the well bore 3, the oil inlet 9 is higher than the oil outlet 11, and the oil inlet 9 and the oil outlet 11 extend to the outside of the well bore 2.
The well body 3 is used as a main body of the chemical packer plugging performance test system, and an actual stratum is simulated for testing, so that the plugging performance of the chemical packer 4 is evaluated.
A jacket is further arranged between the outer wall of the lower half part of the well body 3 and the inner wall of the well shaft 2, a medium is introduced into the jacket, a temperature constant-current inlet 10 is arranged on the jacket, the temperature constant-current inlet 10 extends to the outside of the well shaft 2 and is connected with a temperature control instrument 15, and the temperature control instrument 15 is used for controlling the temperature of the medium in the jacket. However, the control method of the temperature control device 15 in this embodiment is not limited to the above, and one skilled in the art may use other temperature control methods to control the pressure of the test oil 5.
The side wall of the lower half of the well body 3 is provided with a pressure constant flow inlet 18, the pressure constant flow inlet 18 extends to the outside of the well body 2 and is connected with a pressure control instrument 16, and the pressure control instrument 16 is used for introducing gas into the well body 3 through the pressure constant flow inlet 18 to control the pressure of test oil 5 in the well body 3. However, the control method of the pressure control device 16 in this embodiment is not limited to the above, and those skilled in the art can use other pressure control methods to control the pressure of the test oil 5.
The pressure control instrument 16 is an ISCO plunger pump.
The pressure stabilizing valve 12 is arranged between the oil outlet 11 and the oil storage tank 14, so that the test oil 5 can be smoothly discharged into the oil storage tank 14 after the test is finished.
Example two
The embodiment provides a method for testing the plugging performance of a chemical packer, which uses the device for testing the plugging performance of the chemical packer in the first embodiment, and comprises the following steps:
s1, installing and fixing a derrick 1, a shaft 2 and a well body 3;
s2, opening an oil inlet 9, closing an oil outlet 11, putting test oil 5 into the lower half part of the well body 3 through the oil inlet 9, and closing the oil inlet 9 after the injection is finished;
s3, opening a chemical packer inlet 8, closing a chemical packer outlet 7, throwing the chemical packer 4 to be researched into the upper half part of the well body 3 through the chemical packer inlet 8, and closing the chemical packer inlet 8 after throwing is finished;
s4, starting the temperature control instrument 15, the pressure control instrument 16 and the computer 17, and confirming that the computer 17 is connected with the temperature control instrument 15 and the pressure control instrument 16 through data lines;
s5, testing the maximum formation pressure which can be born by the chemical packer 4 under a certain constant temperature condition: the pressure control instrument 16 is connected to the pressure constant flow inlet 18 through a pipeline, parameters of the pressure control instrument 16 are adjusted, the pressure control instrument 16 inputs pressure which increases linearly with time to simulate formation pressure, and whether the layer of the well body 3 where the chemical packer 4 is located is broken through by the formation pressure is observed; looking at the graph drawn by the computer 17, the specific stratum pressure value born by the chemical packer 4 playing a plugging role under the temperature condition can be known; after the test is finished, opening the chemical packer outlet 7, and discharging the chemical packer 4 to the chemical packer reservoir tank 13; the pressure stabilizing valve 12 is regulated, the oil outlet 11 is opened, the test oil 5 is discharged to the oil storage tank 14, and the well body 3 is cleaned, so that the subsequent test is convenient;
the blocking performance of the chemical packer 4 under investigation was tested under constant pressure, different temperature conditions: comparing the thickness of the layer where the chemical packer 4 is located with the thickness broken by the stratum pressure through the graduated scale 6, adjusting parameters of the pressure control instrument 16 to enable the pressure control instrument 16 to provide constant pressure, and controlling the temperature change of the test oil 5 by connecting the temperature control instrument 15 to the temperature constant-current inlet 10 through a pipeline; observing the graduated scale 6 and the computer 17, and recording the breakthrough height of the layer where the chemical packer 4 is located by the oil layer and the corresponding temperature; after the test is finished, opening the chemical packer outlet 7, and discharging the chemical packer 4 to the chemical packer reservoir tank 13; the pressure stabilizing valve 12 is regulated, the oil outlet 11 is opened, the test oil 5 is discharged to the oil storage tank 14, and the well body 3 is cleaned, so that the subsequent test is convenient;
when the plugging performance of different chemical packers 4 on the same test oil 5 under the constant temperature condition is tested: a first set of tests is carried out by putting a chemical packer 4 and a test oil 5, and a pressure change chart with time in a computer 17 is stored; then opening the chemical packer outlet 7, discharging the chemical packer 4 to the chemical packer reservoir tank 13, adjusting the pressure stabilizing valve 12, opening the oil outlet 11, discharging the test oil 5 to the oil reservoir tank 14, and cleaning the well body 3; the next group of tests are carried out, another chemical packer 4 and the same test oil 5 are put into, a computer 17 is checked, and a time-dependent change chart of temperature and pressure is compared, so that the plugging performance evaluation of the different chemical packers 4 on the same test oil 5 can be obtained; opening the chemical packer outlet 7, discharging the chemical packer 4 to the chemical packer reservoir tank 13; the pressure stabilizing valve 12 is regulated, the oil outlet 11 is opened, the test oil 5 is discharged to the oil storage tank 14, and the well body 3 is cleaned;
s6, waste liquid in the chemical packer reservoir tank 13 and the oil reservoir tank 14 is treated according to the specification, the well body 3 is cleaned, the next test is convenient, whether all the inlets and outlets are closed or not is checked, the pressure control instrument 16 and the computer 17 are closed, and the test is finished.
Through the design, the test device and the method for the plugging performance of the chemical packer have the advantages of simple structure, low cost, direct observation, high repeatability and simple operation; in addition, the plugging performance of the chemical packer 4 in the actual stratum is simulated to be evaluated, so that the chemical packer 4 can be more intuitively researched, the plugging performance of the chemical packer 4 can still be exerted under different pressure or temperature conditions, and the efficiency of researching the plugging performance of the chemical packer 4 is further improved.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (5)
1. A method for testing the plugging performance of a chemical packer is characterized by comprising the following steps: the device comprises a well body component, a chemical packer storage tank, an oil storage tank, a temperature control instrument, a pressure control instrument and a computer, wherein the well body component is provided with a chemical packer inlet for chemical packer entering, a chemical packer outlet for chemical packer discharging, an oil inlet for test oil entering and an oil outlet for test oil discharging, the chemical packer outlet is communicated with the chemical packer storage tank, the chemical packer storage tank is used for collecting chemical packer discharged through the chemical packer outlet, the oil outlet is communicated with the oil storage tank, the oil storage tank is used for collecting test oil discharged through the oil outlet, the temperature control instrument is used for controlling the temperature of test oil in the well body component, the pressure control instrument is used for controlling the pressure of the test oil in the well body component, the temperature control instrument and the pressure control instrument are both connected with the computer, and a scale is further arranged on the side wall of the well body component;
the well body assembly comprises a derrick, a well shaft and a well body, wherein the well body is positioned in the well shaft, the derrick is connected with the outer wall of the well shaft and is used for supporting the well shaft, and the scale is positioned on the well body and can be observed through the outside of the well shaft;
a jacket is further arranged between the outer wall of the lower half part of the well body and the inner wall of the well shaft, a medium is introduced into the jacket, a temperature constant-current inlet is arranged on the jacket, the temperature constant-current inlet extends to the outside of the well shaft and is connected with a temperature control instrument, and the temperature control instrument is used for controlling the temperature of the medium in the jacket;
the side wall of the lower half part of the well body is provided with a pressure constant flow inlet which extends to the outside of the well body and is connected with the pressure control instrument, and the pressure control instrument is used for introducing gas into the well body through the pressure constant flow inlet to control the pressure of the test oil in the well body;
the test method for the plugging performance of the chemical packer comprises the following steps:
s1, installing and fixing a derrick, a shaft and a well body;
s2, opening an oil inlet, closing an oil outlet, putting test oil into the lower half part of the well body through the oil inlet, and closing the oil inlet after the putting is finished;
s3, opening a chemical packer inlet, closing a chemical packer outlet, throwing the chemical packer to be researched into the upper half part in the well through the chemical packer inlet, and closing the chemical packer inlet after throwing is finished;
s4, starting a temperature control instrument, a pressure control instrument and a computer, and confirming that the computer is connected with the temperature control instrument and the pressure control instrument through data lines;
s5, testing the maximum formation pressure which can be born by the chemical packer under a certain constant temperature condition: the pressure control instrument is connected to the pressure constant flow inlet through a pipeline, and parameters of the pressure control instrument are adjusted, so that the pressure control instrument inputs pressure which increases linearly with time to simulate the formation pressure, and whether the layer where the chemical packer is located in the well body is broken through by the formation pressure is observed; checking a chart drawn by a computer, and knowing the specific stratum pressure value born by the chemical packer playing a plugging role under the temperature condition; after the test is finished, opening an outlet of the chemical packer, and discharging the chemical packer to a chemical packer storage tank; the pressure stabilizing valve is regulated, the oil outlet is opened, test oil is discharged to the oil storage tank, and the well body is cleaned, so that the subsequent test is facilitated;
the blocking performance of the chemical packer under investigation under constant pressure and different temperature conditions was tested: comparing the thickness of the stratum where the chemical packer is located with the thickness broken by the stratum pressure through a graduated scale, adjusting parameters of a pressure control instrument to enable the pressure control instrument to provide constant pressure, connecting the temperature control instrument to a temperature constant flow inlet through a pipeline, and controlling the temperature change of test oil; observing a graduated scale and a computer, and recording the breakthrough height of the layer where the chemical packer is located by an oil layer and the corresponding temperature thereof; after the test is finished, opening an outlet of the chemical packer, and discharging the chemical packer to a chemical packer storage tank; the pressure stabilizing valve is regulated, the oil outlet is opened, test oil is discharged to the oil storage tank, and the well body is cleaned, so that the subsequent test is facilitated;
when the plugging performance of different chemical packers on the same test oil under the constant temperature condition is tested: firstly, a chemical packer and test oil are put into the system to carry out a first group of tests, and a pressure change chart in a computer along with time is stored; then opening an outlet of the chemical packer, discharging the chemical packer to a chemical packer storage tank, adjusting a pressure stabilizing valve, opening an oil outlet, discharging test oil to the oil storage tank, and cleaning a well body; performing the next group of tests, adding another chemical packer and the same test oil, checking a computer, and comparing a temperature-pressure change chart with time to obtain the plugging performance evaluation of the different chemical packers on the same test oil; opening a chemical packer outlet, and discharging the chemical packer to a chemical packer reservoir tank; the pressure stabilizing valve is regulated, an oil outlet is opened, test oil is discharged to an oil storage tank, and the well body is cleaned;
s6, waste liquid in the chemical packer storage tank and the oil storage tank is treated according to the specification, the well body is cleaned, the next test is convenient, whether all the inlets and outlets are closed or not is checked, the pressure control instrument and the computer are closed, and the test is ended.
2. The method for testing the plugging performance of a chemical packer according to claim 1, wherein: the chemical packer inlet and the chemical packer outlet are both arranged on the side wall of the well body and are close to the upper half part of the well body, the chemical packer inlet is higher than the chemical packer outlet, and the chemical packer inlet and the chemical packer outlet are both extended to the outside of the well body.
3. The method for testing the plugging performance of a chemical packer according to claim 1, wherein: the oil inlet and the oil outlet are both arranged on the side wall of the well body and are close to the lower half part of the well body, the oil inlet is higher than the oil outlet, and the oil inlet and the oil outlet are both extended to the outside of the shaft.
4. The method for testing the plugging performance of a chemical packer according to claim 1, wherein: the pressure control instrument is an ISCO plunger pump.
5. The method for testing the plugging performance of a chemical packer according to claim 1, wherein: a pressure stabilizing valve is arranged between the oil outlet and the oil storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410114614.6A CN117664733B (en) | 2024-01-29 | 2024-01-29 | Device and method for testing blocking performance of chemical packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410114614.6A CN117664733B (en) | 2024-01-29 | 2024-01-29 | Device and method for testing blocking performance of chemical packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117664733A CN117664733A (en) | 2024-03-08 |
| CN117664733B true CN117664733B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410114614.6A Active CN117664733B (en) | 2024-01-29 | 2024-01-29 | Device and method for testing blocking performance of chemical packer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567068A (en) * | 2021-07-24 | 2021-10-29 | 西南石油大学 | Device and method for testing sealing performance parameters of packer of oil and gas well |
| CN218412063U (en) * | 2022-07-21 | 2023-01-31 | 西南石油大学 | Testing device for hydraulic packing strength of well cementation cement sheath-two interfaces |
| CN115683885A (en) * | 2022-11-18 | 2023-02-03 | 中海油能源发展股份有限公司 | Method for evaluating plugging capability of abandoned well cement plug in oil and gas well shaft |
| CN116202928A (en) * | 2021-12-01 | 2023-06-02 | 中国石油天然气集团有限公司 | Visual temperature control phase change plugging tester and testing method |
| CN117052347A (en) * | 2023-09-26 | 2023-11-14 | 西南石油大学 | Plugging simulation experiment device and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567068A (en) * | 2021-07-24 | 2021-10-29 | 西南石油大学 | Device and method for testing sealing performance parameters of packer of oil and gas well |
| CN116202928A (en) * | 2021-12-01 | 2023-06-02 | 中国石油天然气集团有限公司 | Visual temperature control phase change plugging tester and testing method |
| CN218412063U (en) * | 2022-07-21 | 2023-01-31 | 西南石油大学 | Testing device for hydraulic packing strength of well cementation cement sheath-two interfaces |
| CN115683885A (en) * | 2022-11-18 | 2023-02-03 | 中海油能源发展股份有限公司 | Method for evaluating plugging capability of abandoned well cement plug in oil and gas well shaft |
| CN117052347A (en) * | 2023-09-26 | 2023-11-14 | 西南石油大学 | Plugging simulation experiment device and method |
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