CN113933175B - Evaluation device and evaluation method for particle plugging material - Google Patents
Evaluation device and evaluation method for particle plugging material Download PDFInfo
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- CN113933175B CN113933175B CN202010609723.7A CN202010609723A CN113933175B CN 113933175 B CN113933175 B CN 113933175B CN 202010609723 A CN202010609723 A CN 202010609723A CN 113933175 B CN113933175 B CN 113933175B
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- 239000000463 material Substances 0.000 title claims abstract description 152
- 239000002245 particle Substances 0.000 title claims abstract description 140
- 238000011156 evaluation Methods 0.000 title claims abstract description 28
- 238000004088 simulation Methods 0.000 claims abstract description 76
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 238000002474 experimental method Methods 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 abstract description 7
- 238000007873 sieving Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005098 hot rolling Methods 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
- 230000036314 physical performance Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
Abstract
The invention provides an evaluation device and an evaluation method of a particle plugging material, wherein the evaluation device comprises: the simulation chamber is surrounded by the heating insulation layer and is used for containing the particle plugging material to be tested; the hydraulic pressurizing cylinder body is internally provided with a movable hydraulic pressurizing plunger, the hydraulic pressurizing plunger is connected with an isolating plunger, and the isolating plunger is used for pressurizing the particle plugging material in the simulation chamber; a displacement sensor is arranged on the hydraulic pressurizing plunger; and the first hydraulic pump is connected with the simulation chamber and is used for conveying the simulation drilling fluid into the simulation chamber so as to provide pressure for the simulation chamber. The invention reflects the strength, temperature resistance and soaking resistance of the particle plugging material by calculating the integrity and deformation rate of the particle plugging material, and provides a basis for the selection of the particle plugging material. The device can simulate the leakage environment of 20MPa and 150 ℃ at the highest, and has better guiding function on the selection of applicable particle plugging materials for the leakage layers under different temperature and pressure environments.
Description
Technical Field
The invention relates to the field of evaluation of petroleum drilling particle plugging materials, in particular to an evaluation device and an evaluation method of a particle plugging material.
Background
Bridging leakage stoppage accounts for more than 50% of the total leakage stoppage construction, the performance of the used particle leakage stoppage material has great influence on the leakage stoppage effect, and if the performance of the material is not too close, the success rate of leakage stoppage can be obviously reduced. Particularly, the common particle plugging material is a bridging material, generates a framework of a plugging layer in a leakage channel, and lays a foundation for subsequent successful plugging. Therefore, the particle plugging material is crucial for bridging plugging, and the performance of the particle plugging material directly influences the bridging plugging effect.
At present, according to a conventional evaluation method of the particle plugging material, the particle plugging material must be made into a standard module for testing by referring to a standard component strength testing method. However, since the particle plugging materials used for bridging plugging are mostly irregularly shaped, especially the shell materials, the standard modules are difficult to be made, and the strength indexes are difficult to accurately judge. Or the plugging performance of the particle plugging material is indirectly evaluated by means of the plugging slurry, but the performance of the whole plugging slurry system is reflected, and the physical performance of the particle plugging material cannot be accurately reflected. The prior art mainly comprises the steps of hot rolling the particle plugging material at high temperature and high pressure and then measuring the strength of the particle plugging material, and cannot truly reflect the strength of the particle plugging material at high temperature and high pressure.
Because the simulated temperature and pressure environment is necessary for evaluating the strength, the temperature resistance and the soaking resistance of the particle plugging material and improving the pertinence of bridging particle plugging material selection, an evaluation device and an evaluation method of the particle plugging material are necessary to be developed.
Disclosure of Invention
The invention aims to provide an evaluation device and an evaluation method for a particle plugging material, which simulate the environment of a leakage layer at high temperature and high pressure, and the like, evaluate the indexes of the particle plugging material such as strength, temperature resistance, soaking resistance and the like, and provide references for the selection of the particle plugging material in the environment at high temperature and high pressure.
In order to achieve the above object, the present invention provides an evaluation device for a particulate plugging material, comprising:
the simulation chamber is surrounded by the heating insulation layer and is used for containing the particle plugging material to be tested;
The hydraulic pressurizing cylinder body is internally provided with a movable hydraulic pressurizing plunger, one end of the hydraulic pressurizing plunger, which is far away from the hydraulic pressurizing cylinder body, is connected with an isolating plunger, and the isolating plunger is used for pressurizing the particle plugging material in the simulation chamber; a displacement sensor is arranged on the hydraulic pressurizing plunger;
And the first hydraulic pump is connected with the simulation chamber and is used for conveying the simulation drilling fluid into the simulation chamber so as to provide pressure for the simulation chamber.
In a preferred embodiment, the first hydraulic pump is connected with the simulation chamber through a first connecting line, and a filter screen is arranged at the contact end of the first connecting line with the simulation chamber.
In a preferred embodiment, a single flow valve is provided on the first connection line to prevent backflow of the simulated drilling fluid to the first hydraulic pump, and a first pressure gauge and a first pressure relief valve are also provided on the connection line.
In a preferred embodiment, a second hydraulic pump is further included, which communicates with the inlet of the hydraulic pressure cylinder via a second connecting line, for supplying hydraulic oil to the hydraulic pressure cylinder.
In a preferred embodiment, a check valve is provided on the second connection line to prevent hydraulic oil from flowing back to the second hydraulic pump, and a second pressure gauge and a second relief valve are also provided on the second connection line.
In a preferred embodiment, the outer side of the isolating plunger is provided with an inner groove, and a high-temperature-resistant rubber ring is arranged in the inner groove and used for sealing a gap between the isolating plunger and the simulation chamber.
The invention also provides an evaluation method implemented by the evaluation device of the particle plugging material, which comprises the following steps:
(1) Baking the particle plugging material, and screening the particle plugging material;
(2) Weighing the sieved particle plugging material with the mass of G1, placing the particle plugging material into a simulation chamber, pumping the simulation drilling fluid into the simulation chamber, and filling the particle plugging material to the top of the simulation chamber, and mounting an isolation plunger;
(3) Pushing the isolation plunger to the top of the particle plugging material, increasing the pressure in the simulation chamber to a preset pressure, recording the height L 0 of the particle plugging material, and recording the displacement to be 0 by the displacement sensor;
(4) Heating the simulation chamber to a preset temperature by utilizing the heating insulation layer, keeping the pressure in the simulation chamber to be the preset pressure, pressurizing the particle plugging material by using the isolation plunger, recording displacement delta L i at different times by using the displacement sensor, and keeping the liquid pressure value in the simulation chamber unchanged in the pressurizing process;
(5) Taking out the particle plugging material after the preset experiment time, washing with clear water, baking and sieving again, and weighing the residual sieve mass G2
(6) The integrity S of the particle plugging material is calculated according to the following steps,
S＝G2/G1*100
Wherein:
s-the integrity rate of the particle plugging material,%;
g1-the mass of the particle plugging material before the experiment, G;
G2- -the mass of the particle plugging material after the experiment, G;
(7) The deformation C of the particles is calculated as follows,
C＝△Li/L0*100
Wherein:
c, the deformation rate of the particle plugging material,%;
L 0 -height of the particle plugging material under preset pressure, cm;
DeltaL i - -displacement of hydraulic pressure plunger after i minutes of experiment, cm.
In a preferred embodiment, the baking conditions in step (1) and step (5) are baking in an oven at 100 ℃ for 6 hours.
In a preferred embodiment, the screening conditions in step (1) and step (5) are such that the particulate plugging material is screened by superimposing a primary screen over the fine screen.
In a preferred embodiment, the preset pressure in step (3) is 1MPa.
The invention has the beneficial effects that: the evaluation device provided by the invention consists of a simulation chamber for simulating different leakage environments such as temperature, pressure and the like, a liquid for simulating the stress of the particle plugging material, a pressurizing piston mechanism and the like, and the particle plugging material is additionally pressurized by pushing the piston through the hydraulic pump on the premise of keeping a certain temperature and hydraulic pressure, so that the strength and volume change condition of the particle plugging material along with time under the leakage layer environment are evaluated, the strength, temperature resistance and soaking resistance of the particle plugging material are reflected by calculating the integrity rate and deformation rate of the particle plugging material, and a basis is provided for the selection of the particle plugging material. The device can simulate the leakage environment of 20MPa and 150 ℃ at the highest, has clear principle and convenient operation, and has better guiding function on the selection of applicable particle plugging materials for the leakage layers under different temperature and pressure environments.
Drawings
Fig. 1 is a schematic view of an evaluation apparatus of a particulate plugging material according to the present invention.
Reference numerals illustrate: 1. the device comprises a simulation chamber, 2, a heating insulating layer, 3, an isolation plunger, 4, a particle plugging material, 5, a hydraulic pressurizing plunger, 6, a hydraulic pressurizer cylinder body, 7, hydraulic oil, 8, a fixed beam frame, 9, a filter screen, 10, a uniflow valve, 11, a pressure gauge, 12, a pressure relief valve, 13, a hydraulic pump, 14, a connecting pipeline, 15, a pressure relief valve, 16, a pressure gauge, 17, a uniflow valve, 18, a hydraulic pump, 19, a connecting pipeline, 20, a displacement sensor, 21, a computer control end, 22, simulation drilling fluid, 23 and a drilling fluid pool.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, it is a schematic view of an evaluation apparatus for a particulate plugging material according to the present invention. The invention provides an evaluation device of a particle plugging material, which mainly comprises a simulation chamber 1, a heating insulation layer 2, an isolation plunger 3, a hydraulic pressurizing plunger 5, a hydraulic pressurizing cylinder body 6, hydraulic oil 7, a fixed beam frame 8, a filter screen 9, a check valve 10, a first pressure gauge 11, a first pressure relief valve 12, a hydraulic pump 13, a first connecting pipeline 14, a displacement sensor 20, a drilling fluid pool 23, a computer control end 21 and the like.
The simulation chamber 1 is a cylindrical container made of high-strength steel material, is open at the top and has a smooth inner wall and is used for containing the particle plugging material 4 to be tested. The heating insulating layer 2 surrounds the bottom wall and the side wall of the simulation chamber 1 and is used for heating the simulation chamber 1 and keeping a set temperature. In a preferred embodiment, the heating and insulating layer is optionally a thick asbestos layer, in which a resistance wire is arranged, by means of which the simulation chamber 1 is heated and maintained at temperature.
The hydraulic pressurizing cylinder body 6 is internally provided with a hydraulic pressurizing plunger 5 capable of moving along the up-down direction, a cavity enclosed by the hydraulic pressurizing plunger 5 and the hydraulic pressurizing cylinder body 6 is filled with hydraulic oil 7, one end, far away from the hydraulic pressurizing cylinder body 6, of the hydraulic pressurizing plunger 5 is connected with an isolating plunger 3, and the isolating plunger 3 is used for pressurizing the particle plugging material 4 in the simulation cavity 1.
In a preferred embodiment, the isolating plunger 3 is a steel high-strength cylinder with a diameter equal to the inner diameter of the simulation chamber 1, and an inner groove (not shown in detail) is provided on the outer side surface of the isolating plunger 3, which can seal a gap between the isolating plunger 3 and the simulation chamber 1 through a high-temperature-resistant rubber ring matched with the inner groove, and can bear higher pressure, so as to maintain the pressure in the simulation chamber 1.
In another preferred embodiment, the hydraulic pressurizing plunger 5 and the hydraulic pressurizing cylinder 6 are a set of piston structures, which are made of steel materials, and can provide a pressure of 50MPa through the hydraulic oil 7, and the hydraulic pressurizing plunger 5 provides power for the isolating plunger 3 to apply pressure to the particle plugging material in the simulation chamber 1.
In a preferred embodiment, a second hydraulic pump 18 communicates with the inlet of the hydraulic pressure cylinder 6 via a second connecting line 19 for supplying hydraulic oil 7 to the hydraulic pressure cylinder 6 and thereby to power the hydraulic pressure ram 5 and the isolating ram 3. Preferably, the second connecting line 19 is provided with a check valve 17, which is effective to prevent the hydraulic oil 7 from flowing back to the second hydraulic pump 18. In addition, a second pressure gauge 16 and a second pressure relief valve 15 are further disposed on the second connecting line 19, the second pressure gauge 16 is used for observing the pressure in the second connecting line 19, and the second pressure relief valve 15 is used for releasing the pressure of the hydraulic oil 7 in the hydraulic pressurizer cylinder 6 after the experiment is finished.
The fixed beam 8 serves to isolate the chamber 1 from the hydraulic pressurizer cylinder 6. Specifically, the fixed beam 8 is a square frame, and the hydraulic pressurizer cylinder 6 is disposed directly above the isolation chamber 1 so as to apply pressure to the particulate plugging material 4 to be evaluated.
The first hydraulic pump 13 communicates with the simulation chamber 1 via a first connecting line 14, said first hydraulic pump 13 providing pressure to the simulation chamber 1 via the first connecting line 14 by pumping the simulation drilling fluid 22 in the drilling fluid reservoir 23, thereby simulating formation pressure. Preferably, the contact end of the first connecting pipeline 14 with the simulation chamber 1 is provided with a filter screen 9, so as to prevent the first connecting pipeline 14 from being blocked after the particle plugging material 4 to be evaluated in the simulation chamber 1 is broken. Furthermore, the first connecting line 14 is provided with a check valve 10, which can effectively prevent the simulated drilling fluid 22 from flowing back to the first hydraulic pump 13, and maintain the pressure in the simulated chamber 1. The connecting pipeline 14 is further provided with a first pressure gauge 11 and a first pressure relief valve 12, the first pressure gauge 11 is used for observing the pressure in the first connecting pipeline 14, namely the simulation chamber 1, and the first pressure relief valve 12 is used for controlling the pressure in the simulation chamber 1 and simulating the formation pressure condition through pressure relief.
In a preferred embodiment, a displacement sensor 20 for measuring the displacement of the hydraulic pressurizing plunger 5 is also provided on the hydraulic pressurizing plunger 5.
The computer control end 21 is respectively connected with the heating and heat-insulating layer 2, the first pressure release valve 12, the first hydraulic pump 13, the second pressure gauge 16, the second hydraulic pump 18 and the displacement sensor 20 through data wires and is used for controlling and recording the temperature and the pressure in the simulation chamber 1, controlling and recording the pressure of the hydraulic oil 7, namely the pressure of the hydraulic pressurizing plunger 5, and measuring and recording the displacement of the hydraulic pressurizing plunger 5.
The working principle of the invention is as follows:
Before the experiment, the particle plugging material 4 is baked for 6 hours in a baking oven at 100 ℃,2 sieves are stacked together, a coarse sieve is arranged on the upper part, a fine sieve is arranged on the lower part, the particle plugging material 4 is sieved, and the particle plugging material on the fine sieve is taken for the experiment.
During experiments, the screened particle plugging material 4 with the mass G1 is weighed and placed in the simulation chamber 1 to the position of about half of the height, the hydraulic pump 13 is started to pump the simulation drilling fluid 22 in the drilling pool 23 into the simulation chamber 1 and the particle plugging material 4 is not passed through the top of the simulation chamber 1, the isolation plunger 3 is arranged, the first pressure release valve 12 is opened, the second hydraulic pump 18 is started, the hydraulic pressure plunger 5 is driven to push the isolation plunger 3 to the top of the particle plugging material 4, the first pressure release valve 12 is closed, the second hydraulic pump 18 is started to enable the pressure in the simulation chamber 1 to rise to 1MPa, the height L 0 of the particle plugging material is recorded, the displacement sensor 20 is used for recording displacement to be 0, the heating resistance wire in the heating insulation layer 2 is started to be heated to the design temperature, the first pressure release valve 12 is intermittently opened in the heating process, the pressure in the simulation chamber 1 is kept to be the design pressure, the second hydraulic pump 18 is started to pressurize the particle plugging material 4, the displacement quantity DeltaLi in different times is recorded through the displacement sensor 20, the pressure release valve 12 is controlled in the pressurizing process, and the pressure value of the liquid in the simulation chamber 1 is kept unchanged at any time.
The experiment time can be 12 hours, 24 hours, 36 hours, 48 hours or longer, and the experiment is carried out according to the plugging requirement. After the experiment is finished, decompressing and cooling, taking out the particle plugging material, washing the particle plugging material with clear water, putting the particle plugging material into a baking oven at 100 ℃ for baking for 6 hours, sieving the dried particle plugging material by using 2 sieves before the experiment according to the same method, weighing the residual mass G2 on the fine mesh sieve, and calculating the integrity rate S of the particle plugging material according to the following formula.
S＝G2/G1*100
Wherein:
s-the integrity rate of the particle plugging material,%;
g1-the mass of the particle plugging material before the experiment, G;
G2- -the mass of the particle plugging material after the experiment, G.
The higher the integrity S, the better the performances of the particle plugging material such as temperature resistance, soaking resistance and the like are indicated. According to the integrity rate value of different particle plugging materials, the proper particle plugging materials are preferred.
Calculating the deformation C of the particles according to the following method
C＝△Li/L0*100
Wherein:
c, the deformation rate of the particle plugging material,%;
L 0 -the height of the particle plugging material under the condition of 1MPa, cm;
DeltaL i - -displacement of hydraulic pressure plunger after i minutes of experiment, cm.
The larger the deformation rate is, the poorer the strength performance of the particle plugging material is. According to the deformation rate of different particle plugging materials, the proper particle plugging materials are preferred.
The invention also provides an evaluation method of the particle plugging material, which mainly comprises the following steps:
(1) Baking the particle plugging material in a 100 ℃ oven for 6 hours, stacking 2 sieves together, wherein a coarse sieve is arranged on the upper part of the oven, a fine sieve is arranged on the lower part of the oven, sieving the particle plugging material 4, and taking the particle plugging material on the fine sieve for experiment;
(2) During experiments, the screened particle plugging material 4 with the mass G1 is weighed and placed into the simulation chamber 1 to the position of about one half of the height, the hydraulic pump 13 is started to pump the simulation drilling fluid 22 in the drilling pool 23 into the simulation chamber 1, the particle plugging material 4 is not passed through the top of the simulation chamber 1, and the isolation plunger 3 is arranged;
(3) The first pressure release valve 12 is opened, the second hydraulic pump 18 is started, the hydraulic pressurizing plunger 5 is made to push the isolating plunger 3 to the top of the particle plugging material 4, the first pressure release valve 12 is closed, the second hydraulic pump 18 is started, the pressure in the simulation chamber 1 is increased to a preset pressure, such as 1MPa, but not limited to, the height L 0 of the particle plugging material is recorded, and the displacement sensor 20 is made to record displacement as 0;
(4) Starting a heating resistance wire in the heating heat preservation layer 2, heating to a preset temperature, intermittently opening the first pressure release valve 12 in the heating process, keeping the pressure in the simulation chamber 1at the preset pressure, starting the second hydraulic pump 18 to pressurize the particle plugging material 4, recording displacement DeltaLi of different times through the displacement sensor 20, and controlling the first pressure release valve 12 at any time in the pressurizing process to keep the liquid pressure value in the simulation chamber 1 unchanged.
(5) The experiment time can be 12 hours, 24 hours, 36 hours, 48 hours or longer, and the experiment is carried out according to the plugging requirement. After the experiment is finished, decompressing and cooling, taking out the particle plugging material, washing the particle plugging material with clear water, putting the particle plugging material into a baking oven at 100 ℃ for baking for 6 hours, sieving the dried particle plugging material by using 2 sieves before the experiment according to the same method, weighing the residual mass G2 on the fine mesh sieve, and calculating the integrity rate S of the particle plugging material according to the following formula.
S＝G2/G1*100
Wherein:
s-the integrity rate of the particle plugging material,%;
g1-the mass of the particle plugging material before the experiment, G;
G2- -the mass of the particle plugging material after the experiment, G.
The higher the integrity S, the better the performances of the particle plugging material such as temperature resistance, soaking resistance and the like are indicated. According to the integrity rate value of different particle plugging materials, the proper particle plugging materials are preferred.
Calculating the deformation C of the particles according to the following method
C＝△Li/L0*100
Wherein:
c, the deformation rate of the particle plugging material,%;
L 0 -the height of the particle plugging material under the condition of 1MPa, cm;
DeltaL i - -displacement of hydraulic pressure plunger after i minutes of experiment, cm.
The larger the deformation rate is, the poorer the strength performance of the particle plugging material is. According to the deformation rate of different particle plugging materials, the proper particle plugging materials are preferred.
In summary, the beneficial effects of the invention are as follows: the evaluation device provided by the invention consists of a simulation chamber for simulating different leakage environments such as temperature, pressure and the like, a liquid for simulating the stress of the particle plugging material, a pressurizing piston mechanism and the like, and the particle plugging material is additionally pressurized by pushing the piston through the hydraulic pump on the premise of keeping a certain temperature and hydraulic pressure, so that the strength and volume change condition of the particle plugging material along with time under the leakage layer environment are evaluated, the strength, temperature resistance and soaking resistance of the particle plugging material are reflected by calculating the integrity rate and deformation rate of the particle plugging material, and a basis is provided for the selection of the particle plugging material. The device can simulate the leakage environment of 20MPa and 150 ℃ at the highest, has clear principle and convenient operation, and has better guiding function on the selection of applicable particle plugging materials for the leakage layers under different temperature and pressure environments.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An evaluation device for a particulate plugging material, comprising:
the simulation chamber is surrounded by the heating insulation layer and is used for containing the particle plugging material to be tested;
The hydraulic pressurizing cylinder body is internally provided with a movable hydraulic pressurizing plunger, one end of the hydraulic pressurizing plunger, which is far away from the hydraulic pressurizing cylinder body, is connected with an isolating plunger, and the isolating plunger is used for being attached to the top of the particle plugging material and pressurizing the particle plugging material in the simulation chamber; a displacement sensor is arranged on the hydraulic pressurizing plunger;
And the first hydraulic pump is connected with the simulation chamber and is used for conveying the simulation drilling fluid into the simulation chamber so as to provide pressure for the simulation chamber.
2. The device for evaluating a particulate plugging material according to claim 1, wherein the first hydraulic pump is connected to the simulation chamber through a first connecting line, and a filter screen is provided at a contact end of the first connecting line with the simulation chamber.
3. The apparatus for evaluating a particulate plugging material according to claim 1, wherein a check valve is provided on the first connection line to prevent backflow of the simulated drilling fluid to the first hydraulic pump, and a first pressure gauge and a first pressure release valve are further provided on the connection line.
4. The apparatus for evaluating a particulate plugging material according to claim 1, further comprising a second hydraulic pump which communicates with the liquid inlet of the hydraulic pressure cylinder through a second connection line for supplying hydraulic oil to the hydraulic pressure cylinder.
5. The apparatus according to claim 4, wherein a check valve is provided on the second connection line to prevent the hydraulic oil from flowing back to the second hydraulic pump, and a second pressure gauge and a second relief valve are further provided on the second connection line.
6. The device for evaluating a particulate plugging material according to any one of claims 1 to 5, wherein an inner groove is provided on an outer side surface of the isolation plunger, and a high temperature resistant rubber ring is provided inside the inner groove for sealing a gap between the isolation plunger and the simulation chamber.
7. An evaluation method carried out by an evaluation device for a particulate plugging material according to any one of claims 1 to 6, comprising the steps of:
(1) Baking the particle plugging material, and screening the particle plugging material;
(2) Weighing the sieved particle plugging material with the mass of G1, placing the particle plugging material into a simulation chamber, pumping the simulation drilling fluid into the simulation chamber, and filling the particle plugging material to the top of the simulation chamber, and mounting an isolation plunger;
(3) Pushing the isolation plunger to the top of the particle plugging material, increasing the pressure in the simulation chamber to a preset pressure, recording the height L 0 of the particle plugging material, and recording the displacement to be 0 by the displacement sensor;
(4) Heating the simulation chamber to a preset temperature by utilizing the heating insulation layer, keeping the pressure in the simulation chamber to be the preset pressure, pressurizing the particle plugging material by using the isolation plunger, recording displacement delta L i at different times by using the displacement sensor, and keeping the liquid pressure value in the simulation chamber unchanged in the pressurizing process;
(5) Taking out the particle plugging material after the preset experiment time, washing the particle plugging material with clear water, baking and screening the particle plugging material again, and weighing the screen residue mass G2;
(6) The integrity S of the particle plugging material is calculated according to the following steps,
S＝G2/G1*100
Wherein:
s-the integrity rate of the particle plugging material,%;
g1-the mass of the particle plugging material before the experiment, G;
G2- -the mass of the particle plugging material after the experiment, G;
(7) The deformation C of the particles is calculated as follows,
C＝△Li/L0*100
Wherein:
c, the deformation rate of the particle plugging material,%;
L 0 -height of the particle plugging material under preset pressure, cm;
DeltaL i - -displacement of hydraulic pressure plunger after i minutes of experiment, cm.
8. The method according to claim 7, wherein the baking conditions in step (1) and step (5) are baking in an oven at 100 ℃ for 6 hours.
9. The method of evaluating according to claim 7, wherein the screening conditions in step (1) and step (5) are such that the particulate plugging material is screened by superimposing a primary screen on a fine screen.
10. The evaluation method according to any one of claims 7 to 9, wherein the preset pressure in step (3) is 1MPa.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408104A (en) * | 2008-11-28 | 2009-04-15 | 中国地质大学（武汉） | High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system |
| WO2017045402A1 (en) * | 2015-09-18 | 2017-03-23 | 成都维泰油气能源技术有限公司 | Visualized evaluation device for pressure-bearing drilling-fluid plugging and leaking stoppage material property |
| CN107102099A (en) * | 2017-01-11 | 2017-08-29 | 西南石油大学 | With brill leak-proof leak-stopping experimental rig and method |
| CN108240950A (en) * | 2016-12-23 | 2018-07-03 | 中石化石油工程技术服务有限公司 | A kind of method for the evaluation of drilling fluid sealing characteristics |
| CN208013009U (en) * | 2018-04-10 | 2018-10-26 | 中国石油化工股份有限公司 | Measurement is in the system for simulating true reservoir condition downward stream grain density |
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| WO2016033294A1 (en) * | 2014-08-28 | 2016-03-03 | Saudi Arabian Oil Comany | Method and apparatus for testing gel-based lost circulation materials |
| US20230375523A1 (en) * | 2022-05-19 | 2023-11-23 | Saudi Arabian Oil Company | Lost circulation material evaluation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408104A (en) * | 2008-11-28 | 2009-04-15 | 中国地质大学（武汉） | High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system |
| WO2017045402A1 (en) * | 2015-09-18 | 2017-03-23 | 成都维泰油气能源技术有限公司 | Visualized evaluation device for pressure-bearing drilling-fluid plugging and leaking stoppage material property |
| CN108240950A (en) * | 2016-12-23 | 2018-07-03 | 中石化石油工程技术服务有限公司 | A kind of method for the evaluation of drilling fluid sealing characteristics |
| CN107102099A (en) * | 2017-01-11 | 2017-08-29 | 西南石油大学 | With brill leak-proof leak-stopping experimental rig and method |
| CN208013009U (en) * | 2018-04-10 | 2018-10-26 | 中国石油化工股份有限公司 | Measurement is in the system for simulating true reservoir condition downward stream grain density |
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