CN115078635A - Volume-swelling leakage plugging liquid testing device and testing method - Google Patents
Volume-swelling leakage plugging liquid testing device and testing method Download PDFInfo
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Abstract
The invention belongs to the technical field of leakage stoppage in the petroleum and natural gas drilling industry, and particularly provides a testing device and a testing method for volume expansion leakage stoppage liquid, wherein the testing device comprises a pressure control device, a grouting device, a receiving device, an experimental bin, a heating device and a fixing device; the invention can truly simulate the shaft bottom data, can be used for one time or for multiple times, can be replaced if damaged or blocked, has simple operation and low cost, and has very high practical value.
Description
Technical Field
The invention belongs to the technical field of leakage stoppage in the petroleum and natural gas drilling industry, and particularly relates to a testing device and a testing method for a volume expansion leakage stoppage liquid.
Background
With the comprehensive development of oil and gas fields, reservoir development is compact, the block mining technology with regular and stable stratum is mature, but with the increase of oil and gas equivalent mining tasks, a plurality of unexplored blocks and edge exploratory areas enter the mining range, and as the geological complex structure of an unknown block causes great technical difficulty to well drilling, especially as underground complexity and non-production timeliness caused by well leakage increase, the plugging technology becomes a key technical problem restricting the well drilling benefit.
Along with the development of plugging technology, various plugging materials are also popularized widely, but the corresponding experiment and evaluation device is lacked to the plugging material of polymorphic type, the pertinence is not strong, the indoor data is lacked, and the existing plugging technical equipment has many drawbacks and deficiencies: 1. the simulation of real well bottom data can not be realized, a simple plunger plugging mode 2, a plugging slurry injection process and a plugging slurry plugging mechanism can be carried out in a sealing device, the plugging process can not be observed, and 3, the plugging time of gel and a volume-expanded material can not be visually observed, the plugging slurry can not enter a leaking layer and the plugging mechanism of a plugging bottom layer can not be described and analyzed, and useless and repeated experiments can often occur.
After the plugging is finished, a pressure-bearing experiment is often needed for the leaking layer, the pressure-bearing capacity of the leaking layer after plugging cannot be evaluated by a plurality of devices, and the relation between the pressure-bearing capacity and the time of the plugging rubber block cannot be observed visually. Many lost circulation devices employ integrated lost circulation devices: the temperature-resistant and pressure-resistant body is directly provided with the leakage stoppage liquid, the leakage stoppage device is easily blocked after the leakage stoppage, the common manpower and some equipment are used for removing the leakage stoppage curing material, the body of the leakage stoppage device is easily damaged, and even the phenomenon of scrapping of a leakage stoppage instrument occurs.
Chinese patent document No. CN204738806U, published 2015, 11/4, discloses a visual simulated downhole leaking stoppage testing device, a bottom plate is fixed on a support, a pressure-resistant transparent cylinder is fixed on the bottom plate, a cover plate covers an upper port of the pressure-resistant transparent cylinder, an upper port and a lower port of the pressure-resistant transparent cylinder are respectively sealed with the cover plate and the bottom plate through seal rings, the cover plate and an outer edge of the bottom are connected with each other through a long bolt, and the bottom plate, the cover plate and the pressure-resistant transparent cylinder share a common axis; the cover plate is connected with a grouting pipe, the upper end of the grouting pipe is provided with a grouting valve, and the inlet of the grouting valve is connected with a slurry funnel; the cover plate is also connected with an air inlet pipe, the upper end of the air inlet pipe is provided with an air pressure control valve, and the inlet of the air pressure control valve is connected with an air supply pipeline; the middle part of the bottom plate is connected with a slurry discharging pipe, and a slurry discharging valve is arranged on the slurry discharging pipe; the inner wall circumference of the middle lower part of the pressure-resistant transparent cylinder body is provided with an inward protruding step, and a water-permeable pore plate is placed on the step. The device can simulate the whole leakage process and be visible for 360 degrees, and can also test the bearing capacity of the rubber block after successful leakage stoppage. However, the document cannot realize real well bottom data simulation, and cannot solve the problems that the plugging device is blocked after plugging is completed, the body of the plugging device is easy to damage during cleaning, and the plugging instrument is scrapped.
Disclosure of Invention
The invention provides a testing device and a testing method for a volume-swelling plugging liquid, and aims to solve the problems that real well bottom data simulation cannot be realized, the plugging device is blocked after plugging is completed, the body of the plugging device is easy to damage during cleaning, and the phenomenon of scrapping of plugging instruments cannot be solved in the prior art.
Therefore, the invention provides a testing device for volume expansion plugging liquid, which comprises a pressure control device, a grouting device, a receiving device, an experimental bin, a heating device and a fixing device, wherein the pressure control device is connected with the grouting device; the pressure control device comprises an air inlet pipe, a pressure regulating valve and an air source, the grouting device comprises a grouting funnel, a grouting valve and a grouting pipeline, the receiving device comprises a connecting pipeline, a receiving valve and a measurer, the experimental bin comprises a pipe, a fixing ring, a supporting leg, a rotary sleeve, an inner cylinder, an upper cover plate and a ventilating plate, and the fixing device comprises a rotating wheel, a bottom plate surface, a support and a cross beam; the support comprises an upper support, a frame plate and a lower support, a cross beam, the upper support, the frame plate, the lower support, a bottom plate surface and a rotating wheel are sequentially connected from top to bottom, a connecting pipe is arranged on the upper surface of the frame plate, the pipe is positioned in the upper support, an upper cover plate is connected on the upper surface of the pipe, the upper cover plate is connected with the cross beam, an inner cylinder, a ventilating plate and a supporting leg are sequentially connected from top to bottom in the pipe, the upper end of a connecting pipeline is connected with the middle part of the ventilating plate, the lower end of the connecting pipeline penetrates through the frame plate, the lower part of the connecting pipeline is connected with a receiving valve, the receiving valve is positioned below the frame plate, a measurer is connected on the upper surface of the bottom plate, the measurer is positioned right below the lower end of the connecting pipeline, a rotating sleeve is sleeved outside the lower part of the pipe, the frame plate is connected below the rotating sleeve, a fixing ring is connected between the inner cylinder and the pipe, a heating device is connected outside the pipe, an air source sequentially passes through a pressure regulating valve and an air inlet pipe to connect the upper cover plate, and the upper end of a grouting funnel is connected with a grouting funnel, the lower end of the grouting pipeline penetrates through the upper cover plate, the lower end of the grouting pipeline is located in the inner cylinder, and a grouting valve is connected to the pipe body of the grouting pipeline above the upper cover plate.
Preferably, the tube is made of a transparent colorless material, the bottom plate surface is made of a heavy material with the thickness of 3-5cm, the inner cylinder is made of a light transparent material, and the air permeable plate and the supporting legs are made of light materials.
Preferably, the heating device comprises a heating jacket and a temperature control box, the heating jacket is connected to the outer side of the tube, and the heating jacket is electrically connected with the temperature control box.
Preferably, the upper cover plate and the tube are sealed by a sealing rubber ring.
Preferably, the outer walls of the tube and the inner cylinder are provided with scale marks.
Preferably, the height of the liquid filled between the tube and the inner barrel does not exceed 2/3.
Preferably, the central shafts of the grouting hopper, the grouting valve and the grouting pipeline are the same and are vertical central shafts.
Preferably, the bottom of the inner barrel is provided with a filter screen.
Preferably, the rotating wheel is a self-locking rotating wheel which can rotate and move for 360 degrees.
A test method of a body swelling plugging liquid test device comprises a body swelling plugging liquid plugging test and a plugging pressure-bearing test;
the leakage stoppage test of the volume expansion leakage stoppage liquid comprises the following steps:
1) a simulated leakage layer is filled in the inner cylinder;
2) injecting clear water between the pipe and the inner cylinder to a target height;
3) turning on the heating device, and raising the temperature in the tube to a first target temperature and keeping the temperature;
4) opening a grouting valve, injecting the volume-swelling leakage-stopping liquid into the inner cylinder through a grouting funnel and a grouting pipeline, and recording the volume and corresponding scales of the volume-swelling leakage-stopping liquid in the inner cylinder;
5) opening an air source, and adjusting the pressure of the inner cylinder to a first experiment pressure through a pressure adjusting valve and keeping the first experiment pressure; the method comprises the following steps that (1) volume-swelling leakage-stopping liquid enters a simulation leakage layer under the drive of first experiment pressure and reacts with the simulation leakage layer, and volume-swelling leakage-stopping liquid stopping scales are recorded after the reaction is stopped;
6) closing the air source and the power supply, and evaluating the plugging effect of the volume-swelling plugging liquid according to the data of the volume-swelling plugging liquid recorded in the step 4) and the step 5);
the leak stoppage pressure-bearing test comprises the following steps:
s1, after the plugging test of the volume-swelling plugging liquid is finished, opening a heating device, and raising the temperature in the pipe to a second target temperature and keeping the temperature;
s2, opening a grouting valve, injecting drilling fluid into the inner cylinder through a grouting funnel and a grouting pipeline, and closing the grouting valve;
and S3, opening the air source, adjusting the pressure of the inner cylinder to a second experimental pressure through the pressure adjusting valve, closing the air source and keeping the air source, and evaluating the plugging effect of the volume-swelling plugging liquid according to the pressure drop of the inner cylinder and the intrusion volume of the volume-swelling plugging liquid.
The invention has the beneficial effects that:
1. the invention provides a testing device and a testing method for the volume-swelling leakage-stopping liquid; simulating well pressure by a pressure control device; the grouting device selectively injects liquid according to the test content, injects the body-swelling plugging liquid through the grouting device when performing the plugging test of the body-swelling plugging liquid, and injects drilling fluid through the grouting device when performing the plugging and bearing test; the reaction process of the plugging material at different temperatures at the bottom of the well can be simulated by the heating device, and the temperature sensitivity of the plugging material is evaluated; the bottom hole data can be truly simulated.
2. The device and the method for testing the bulk expansive plugging liquid have the advantages that the design of the inner cylinder and the outer cylinder (the inner cylinder is connected in the pipe) is adopted, the economic practicability is strong, the traditional plugging device adopts a direct experiment method, the glass fiber pipe is directly provided with a plugging material and a sand bed, the glass fiber pipe is easily plugged and damaged in one experiment, the cost is high, the economic practicability is poor, the inner cylinder is made of light transparent materials, the device is high-temperature resistant, economical and applicable, the cost is low, the device can be used once or repeatedly, and can be replaced if damaged or plugged, the operation is simple, the cost is low, and therefore, the device and the method have high practical value.
3. According to the device and the method for testing the volume-swelling leakage-stopping liquid, the self-locking rotating wheel which can rotate and move for 360 degrees is arranged on the bottom plate surface, the rotating wheel has a self-locking function and guarantees the stability of the testing device during the experiment, and the movable rotating wheel is arranged on the bottom plate surface, so that the stability and the weight of equipment are guaranteed, and the lightness and convenience in movement of the equipment are guaranteed.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a front view of a structure of a device for testing a volume-swelling plugging fluid;
FIG. 2 is a schematic structural view of the tube and inner barrel;
fig. 3 is a schematic view of the structure of the heating apparatus.
Description of reference numerals: 1. a rotating wheel; 2. a floor surface; 3. a support; 4. a bolt; 5. a pressure regulating valve; 6. an air inlet pipe; 7. an upper cover plate; 8. a cross beam; 9. grouting a funnel; 10. a grouting valve; 11. grouting a pipeline; 12. a tube; 13. a fixing ring; 14. heating a jacket; 15. a support leg; 16. connecting a pipeline; 17. a receiving valve; 18. a measurer; 19. rotating the sleeve; 20. an inner barrel; 21. a gas permeable plate; 22. a temperature control box; 23. a gas source; 3-1, an upper bracket; 3-2, a frame plate; 3-3, lower support.
Detailed Description
Example 1:
as shown in fig. 1-3, a device for testing a volume-expansion plugging fluid comprises a pressure control device, a grouting device, a receiving device, an experimental bin, a heating device and a fixing device; the pressure control device comprises an air inlet pipe 6, a pressure regulating valve 5 and an air source 23, the grouting device comprises a grouting funnel 9, a grouting valve 10 and a grouting pipeline 11, the receiving device comprises a connecting pipeline 16, a receiving valve 17 and a measurer 18, the experiment bin comprises a pipe 12, a fixing ring 13, a supporting leg 15, a rotating sleeve 19, an inner cylinder 20, an upper cover plate 7 and a ventilating plate 21, and the fixing device comprises a rotating wheel 1, a bottom plate surface 2, a support 3 and a cross beam 8; the support 3 comprises an upper support 3-1, a frame plate 3-2 and a lower support 3-3, a cross beam 8, the upper support 3-1, the frame plate 3-2, the lower support 3-3, a bottom plate surface 2 and a rotating wheel 1 are sequentially connected from top to bottom, a connecting pipe 12 on the frame plate 3-2 and a pipe 12 are positioned inside the upper support 3-1, an upper cover plate 7 is connected above the pipe 12 and the upper cover plate 7 is connected with the cross beam 8, an inner cylinder 20, a vent plate 21 and a supporting leg 15 are sequentially connected inside the pipe 12 from top to bottom, the upper end of a connecting pipeline 16 is connected with the middle part of the vent plate 21, the lower end of the connecting pipeline 16 penetrates through the frame plate 3-2, the lower part of the connecting pipeline 16 is connected with a receiving valve 17 and the receiving valve 17 is positioned below the frame plate 3-2, a measurer 18 is connected on the top of the bottom plate surface 2 and the measurer 18 is positioned right below the lower end of the connecting pipeline 16, a rotating sleeve 19 is sleeved outside the lower portion of a pipe 12, the lower portion of the rotating sleeve 19 is connected with a frame plate 3-2, a fixing ring 13 is connected between an inner cylinder 20 and the pipe 12, the pipe 12 is externally connected with a heating device, an air source 23 sequentially passes through a pressure regulating valve 5 and an air inlet pipe 6 to be connected with an upper cover plate 7, the upper end of a grouting pipeline 11 is connected with a grouting funnel 9, the lower end of the grouting pipeline 11 penetrates through the upper cover plate 7, the lower end of the grouting pipeline 11 is located in the inner cylinder 20, and a grouting valve 10 is connected to the pipe body of the grouting pipeline 11 above the upper cover plate 7.
The invention provides a testing device and a testing method for the volume-swelling leakage-stopping liquid; well pressure is simulated through the pressure control device, and the pressure of the pipe and the inner cylinder is controlled through the pressure regulating valve 5, so that the pressure relief is convenient, and the safety is high; the inner cylinder is connected with a receiving valve 17 through a connecting pipeline 16, and a pressure channel can be adjusted through the receiving valve 17 to simulate the leakage pressure of a leakage channel; the internal and external pressures of the inner cylinder are provided by air sources, and are consistent, so that the process of pushing the leaking stoppage slurry by being pressed can be simulated; the grouting device selectively injects liquid according to the test content, and injects the body-swelling plugging liquid through the grouting device when the plugging test of the body-swelling plugging liquid is carried out, and injects drilling fluid through the grouting device when the plugging and pressure-bearing test is carried out; the reaction process of the plugging material at different temperatures at the bottom of the well can be simulated by the heating device, and the temperature sensitivity of the plugging material is evaluated; the bottom hole data can be truly simulated. Through adopting the design of interior urceolus (intraductal 12 inscription inner tube 20), economic practicality is strong, and traditional plugging device adopts direct experimental method, and glass fiber pipe directness device leaking stoppage material and sand bed, the experiment once blocks up very easily and damages glass fiber pipe, and cost price is high, and economic practicality is poor, and the inner tube 20 economy of this application is suitable for, and is with low costs, but the repetitious usage also can once only use, if damage or block up can change, easy operation, and is with low costs, consequently has very high practical value.
Example 2:
on the basis of the embodiment 1, the tube 12 is made of transparent colorless material, the bottom plate surface 2 is made of heavy material with the thickness of 3-5cm, the inner cylinder 20 is made of light transparent material, and the air-permeable plate 21 and the supporting leg 15 are made of light material.
The pipe 12 is made of transparent colorless materials, the inner cylinder 20 is made of light transparent materials, and the process that the plugging slurry enters the stratum and blocks the stratum can be visually observed, the plugging mechanism of the plugging slurry is truly reflected, whether the plugging slurry completely reacts or not can be visually observed, whether the plugging operation is finished or not is determined, and blind repeated experiments are avoided. The bottom plate surface 2 is made of a heavy material with the thickness of 3-5cm, so that the bearing capacity is strong and the stability is good; the air permeable plate 21 and the supporting legs 15 are made of light materials, so that the weight of the device is reduced.
Preferably, the tube 12 is an organic glass tube, the inner diameter of the organic glass tube is 8-12cm, and the thickness of the organic glass tube is 2-3 cm; the compression resistance can reach 15MPa, and the high temperature resistance can reach 100 ℃.
Preferably, the wall thickness of the inner cylinder 20 is 0.2-0.4cm, and the inner diameter is 6-8 cm; the high temperature resistance can reach 100 degrees.
Preferably, a plurality of round holes are formed in the air permeable plate 21 and are uniformly distributed, and the diameter of each round hole is 2-4 mm; the ventilation plate can bear rock blocks such as rock debris with the diameter of more than 5mm, steel balls or a steel plate layer with fine slits, so that the simulation of 3 leakage strata of holes, holes and slits can be realized, the simulation leakage stratum material is close to the strata lithology, and the simulation leakage stopping effect is closer to the real leakage stopping effect.
Preferably, the heating device comprises a heating jacket 14 and a temperature control box 22, the heating jacket 14 is connected to the outer side of the tube 12, and the heating jacket 14 is electrically connected with the temperature control box 22.
The adjustable range of the heating device with the structure is 30-100 ℃, the adjustable range of the temperature rise speed is 0.1-60 ℃, and the temperature control accuracy is +/-0.1 ℃.
Preferably, the upper cover plate 7 and the tube 12 are sealed by a sealing rubber ring. The tightness of the device during testing is improved, and the testing precision is improved.
Preferably, the outer walls of the tube 12 and the inner barrel 20 are provided with scale marks. The scale marks can truly observe the volume expansion times of the plugging fluid in the simulated shaft.
Preferably, the height of the liquid filled between the tube 12 and the inner barrel 20 does not exceed 2/3 of the height of the inner barrel 20.
And under the condition of meeting the test requirements, the safety of the operation process is ensured.
Preferably, the central axes of the grouting funnel 9, the grouting valve 10 and the grouting pipeline 11 are the same and are vertical central axes.
The central shaft is a vertical central shaft, namely a vertical injection mode is adopted, and the forms of leaking stoppage slurry outlet drilling tools and drilling fluid inlet mineshafts are simulated.
Preferably, a filter screen is arranged at the bottom of the inner barrel 20. The connecting pipeline can be prevented from being blocked by the leakage blocking liquid.
Preferably, the rotating wheel 1 is a self-locking rotating wheel capable of self-locking 360-degree rotary movement.
The 360-degree self-locking rotating wheel capable of rotating and moving is installed on the bottom plate surface, the rotating wheel has a self-locking function, the stability of the testing device during the experiment is guaranteed, and the movable rotating wheel is installed on the bottom plate surface, so that the stability and the weight of the equipment are guaranteed, and the equipment is light and convenient to move.
Preferably, the cross beam 8 is connected to the upper bracket 3-1 by bolts 4. The bolt connection is detachable connection, and the connection and the detachment are convenient.
Preferably, the number of the fixing rings 13 is plural, and the plural fixing rings 13 are uniformly connected between the inner cylinder 20 and the tube 12 from top to bottom. The inner cylinder 20 can be stably coupled within the tube 12.
Preferably, the heating jacket 14 comprises 2 heating sheets and a lock catch, and the 2 heating sheets are connected through the lock catch; when in use, the heating sheet is wrapped on the outer side of the inner cylinder 20; convenient to use, the laminating degree is high, and heating efficiency is high.
Preferably, the diameter of the air-permeable plate 21 is smaller than that of the tube 12, and the gap between the air-permeable plate 21 and the tube 12 is 5-8% of the diameter of the tube 12. When the maximize satisfied supporting role, improve the stability of structure, the installation is dismantled conveniently.
Preferably, the measuring device 18 is a measuring cylinder; the measuring cylinder is economical and practical.
Example 3:
a test method of a body swelling plugging liquid test device comprises a body swelling plugging liquid plugging test and a plugging pressure-bearing test;
the plugging test of the volume swelling plugging liquid comprises the following steps:
1) a simulated leak layer is filled in the inner cylinder 20;
2) injecting clean water between the pipe 12 and the inner cylinder 20 to a target height;
3) turning on the heating device to raise the temperature inside the tube 12 to a first target temperature and maintain it;
4) opening the grouting valve 10, injecting the volume-swelling leakage-stopping liquid into the inner cylinder 20 through the grouting funnel 9 and the grouting pipeline 11, and recording the volume and corresponding scales of the volume-swelling leakage-stopping liquid in the inner cylinder 20;
5) opening the air source 23, adjusting the pressure of the inner barrel 20 to the first experiment pressure through the pressure adjusting valve 5, and keeping the first experiment pressure; the method comprises the following steps that (1) volume-swelling leakage-stopping liquid enters a simulation leakage layer under the drive of first experiment pressure and reacts with the simulation leakage layer, and volume-swelling leakage-stopping liquid stopping scales are recorded after the reaction is stopped;
6) closing the air source and the power supply, and evaluating the plugging effect of the volume-swelling plugging liquid according to the data of the volume-swelling plugging liquid recorded in the step 4) and the step 5);
the leak stoppage pressure-bearing test comprises the following steps:
s1, after the plugging test of the volume-swelling plugging liquid is finished, opening the heating device, and raising the temperature in the pipe 12 to a second target temperature and keeping the temperature;
s2, opening the grouting valve 10, injecting drilling fluid into the inner barrel 20 through the grouting funnel 9 and the grouting pipeline 11, and closing the grouting valve 10;
and S3, opening the air source 23, adjusting the pressure of the inner cylinder 20 to a second experimental pressure through the pressure adjusting valve 5, closing the air source 23 and keeping, and evaluating the plugging effect of the volume-swelling plugging liquid according to the pressure drop of the inner cylinder 20 and the intrusion volume of the volume-swelling plugging liquid.
The invention can visually observe the bearing capacity of the leaking stoppage rubber block after leaking stoppage, perform indoor quantitative evaluation on the leaking stoppage effect and is beneficial to the optimization and improvement of the leaking stoppage formula.
Example 4:
evaluation of leakage blocking effect of bulk expansion leakage blocking liquid under 60 ℃/6MPa
This device runner 1 is in the lock state of dying, can not remove, ensures that the laboratory glassware installation is firm.
1) A simulated leakage layer is arranged in the inner cylinder 20, the simulated leakage layer is formed by mixing 850-425um quartz sand and 2-3mm stones, and a sand bed is wetted by water;
2) 2/3 filling clear water between the pipe 12 and the inner cylinder 20 to the height of the inner cylinder 20;
3) fixing a cross beam 8 and an upper cover plate 7 on the experimental device bracket 3 by using a bolt 4, and connecting a pressure regulating valve 5 and an air inlet pipe 6 to the upper cover plate 7; opening the temperature control box 22, setting the temperature to 60 ℃, enabling the temperature in the pipe 12 to reach 60 ℃, and keeping the temperature within an error range;
4) opening the grouting valve 10, injecting the body-swelling leakage-stopping liquid into the inner cylinder 20 through the grouting hopper 9 and the grouting pipeline 11, wherein the volume of the body-swelling leakage-stopping liquid is V1, closing the grouting valve 10, and recording the corresponding scale H1 of the body-swelling leakage-stopping liquid;
5) opening an air source 23, adjusting the pressure of the inner cylinder 20 to 6MPa through a pressure adjusting valve 5, and keeping the pressure stable; observing and recording experimental data, enabling the volume-swelling plugging liquid to enter the simulated leakage layer under the driving of pressure and react with the simulated leakage layer, visually observing whether the reaction is ended, and recording a scale H2 after the reaction of the plugging liquid is ended;
6) closing the gas source and the power supply;
calculating the volume after reaction
The expansion times of the volume-swelling leakage-stopping liquid can be calculated through the volume difference delta V before and after the reaction.
Example 5:
leak stoppage pressure-bearing evaluation test (7MPa/70 ℃):
1) under the experimental steps and experimental conditions of example 3, after the completion of the leaking stoppage experiment, the leaking stoppage pressure-bearing evaluation test is continued; opening the temperature control box 22, and heating to 70 ℃;
3) opening the grouting valve 10, injecting 100mL of prepared drilling fluid into the inner cylinder 20, and closing the grouting valve again;
4) opening the air source 23, and regulating the pressure of the inner cylinder 20 to 7Mpa through the pressure regulating valve 5; and (3) closing the gas source, ensuring the initial pressure to be 7MPa, observing the volume of the drilling fluid invading the stratum, and evaluating the plugging effect of the body-swelling plugging fluid by observing the pressure drop and the invasion volume of the body-swelling plugging fluid.
Application example 4, in-situ application at 60 ℃ evaluation of the volume-swelling leakage-stopping fluid.
The well drilling is carried out until the well depth reaches 1762 meters, the loss-return leakage occurs, cement is pumped for many times, the bridge plug leakage stoppage is ineffective, and the expansion leakage stoppage liquid is evaluated by indoor evaluation at 60 ℃ in site
The expansion times of the volume expansion plugging liquid are 1.5 times and the compressive strength is more than 4MPa for indoor evaluation.
In the description of the present invention, it is to be understood that the terms "front", "inside", "right", and the like, if any, are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used for illustrative purposes only and are not to be construed as limiting the present invention.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. The utility model provides a body swells nature plugging fluid testing arrangement which characterized in that: comprises a pressure control device, a grouting device, a receiving device, an experimental bin, a heating device and a fixing device; the pressure control device comprises an air inlet pipe (6), a pressure regulating valve (5) and an air source (23), the grouting device comprises a grouting funnel (9), a grouting valve (10) and a grouting pipeline (11), the receiving device comprises a connecting pipeline (16), a receiving valve (17) and a measurer (18), the experiment bin comprises a pipe (12), a fixing ring (13), a supporting leg (15), a rotary sleeve (19), an inner cylinder (20), an upper cover plate (7) and a breathable plate (21), and the fixing device comprises a rotating wheel (1), a bottom plate surface (2), a support (3) and a cross beam (8); the support (3) comprises an upper support (3-1), a frame plate (3-2) and a lower support (3-3), a cross beam (8), the upper support (3-1), the frame plate (3-2), the lower support (3-3), a bottom plate surface (2) and a rotating wheel (1) are sequentially connected from top to bottom, an upper connecting pipe (12) of the frame plate (3-2) and a pipe (12) are positioned in the upper support (3-1), an upper connecting cover plate (7) of the pipe (12) and an upper cover plate (7) of the upper connecting cover plate are connected with the cross beam (8), an inner cylinder (20), a ventilating plate (21) and a supporting leg (15) are sequentially connected from top to bottom in the pipe (12), the upper end of a connecting pipeline (16) is connected with the middle part of the ventilating plate (21), the lower end of the connecting pipeline (16) penetrates through the frame plate (3-2), the lower part of the connecting pipeline (16) is connected with a receiving valve (17) and the receiving valve (17) is positioned below the frame plate (3-2), the measurer (18) is connected on the bottom plate surface (2) and the measurer (18) is located under the lower end of a connecting pipeline (16), a lower portion of a pipe (12) is externally sleeved with a rotary sleeve (19) and a lower connecting frame plate (3-2) of the rotary sleeve (19), a fixing ring (13) is connected between an inner cylinder (20) and the pipe (12), the pipe (12) is externally connected with a heating device, an air source (23) is connected with an upper cover plate (7) sequentially through a pressure regulating valve (5) and an air inlet pipe (6), a grouting funnel (9) is connected with the upper end of a grouting pipeline (11), the lower end of the grouting pipeline (11) penetrates through the upper cover plate (7) and the lower end of the grouting pipeline (11) is located in the inner cylinder (20), and a grouting valve (10) is connected to the pipe body of the grouting pipeline (11) above the upper cover plate (7).
2. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the tube (12) is made of transparent colorless materials, the bottom plate surface (2) is made of heavy materials with the thickness of 3-5cm, the inner cylinder (20) is made of light transparent materials, and the air permeable plate (21) and the supporting leg (15) are made of light materials.
3. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the heating device comprises a heating jacket (14) and a temperature control box (22), the heating jacket (14) is connected to the outer side of the tube (12), and the heating jacket (14) is electrically connected with the temperature control box (22).
4. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the upper cover plate (7) and the pipe (12) are sealed through a sealing rubber ring.
5. The device for testing a volume expansion plugging fluid according to claim 1, wherein: and the outer walls of the pipe (12) and the inner cylinder (20) are provided with scale marks.
6. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the height of the liquid filled between the pipe (12) and the inner cylinder (20) does not exceed 2/3 of the height of the inner cylinder (20).
7. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the central shafts of the grouting funnel (9), the grouting valve (10) and the grouting pipeline (11) are the same and are vertical central shafts.
8. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the bottom of the inner barrel (20) is provided with a filter screen.
9. The device for testing a volume expansion plugging fluid according to claim 1, wherein: the rotating wheel (1) adopts a self-locking rotating wheel which can rotate and move for 360 degrees.
10. A method for testing the device for testing a volume expansion plugging fluid according to any one of claims 1 to 9, wherein: comprises a plugging test and a plugging pressure-bearing test of the volume-swelling plugging liquid;
the leakage stoppage test of the volume expansion leakage stoppage liquid comprises the following steps:
1) a simulated leakage layer is arranged in the inner cylinder (20);
2) injecting clear water between the pipe (12) and the inner cylinder (20) to a target height;
3) turning on the heating device to raise the temperature in the tube (12) to a first target temperature and maintaining the temperature;
4) opening a grouting valve (10), injecting the swelling leakage-stopping liquid into the inner cylinder (20) through a grouting funnel (9) and a grouting pipeline (11), and recording the volume and corresponding scales of the swelling leakage-stopping liquid in the inner cylinder (20);
5) opening an air source (23), and adjusting the pressure of the inner barrel (20) to a first experiment pressure through a pressure adjusting valve (5) and keeping the first experiment pressure; the body swelling leakage blocking liquid enters the simulated leakage layer under the drive of the first experiment pressure and reacts with the simulated leakage layer, and after the reaction is ended, the stopping scale of the body swelling leakage blocking liquid is recorded;
6) closing the air source and the power supply, and evaluating the plugging effect of the volume-swelling plugging liquid according to the data of the volume-swelling plugging liquid recorded in the step 4) and the step 5);
the leak stoppage pressure-bearing test comprises the following steps:
s1, after the plugging test of the volume expansion plugging liquid is finished, opening a heating device, raising the temperature in the pipe (12) to a second target temperature and keeping the temperature;
s2, opening a grouting valve (10), injecting drilling fluid into the inner barrel (20) through a grouting funnel (9) and a grouting pipeline (11), and closing the grouting valve (10);
s3, opening the air source (23), adjusting the pressure of the inner cylinder (20) to a second experiment pressure through the pressure adjusting valve (5), closing the air source (23) and keeping, and evaluating the plugging effect of the body-swelling plugging liquid according to the pressure drop of the inner cylinder (20) and the invasion volume of the body-swelling plugging liquid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066075A (en) * | 2022-11-25 | 2023-05-05 | 中国石油天然气集团有限公司 | Crack plugging evaluation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116066075A (en) * | 2022-11-25 | 2023-05-05 | 中国石油天然气集团有限公司 | Crack plugging evaluation device |
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