LU102165B1 - High-voltage pulse discharge fracturing experiment platform for reforming oil and gas reservoirs - Google Patents
High-voltage pulse discharge fracturing experiment platform for reforming oil and gas reservoirs Download PDFInfo
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- LU102165B1 LU102165B1 LU102165A LU102165A LU102165B1 LU 102165 B1 LU102165 B1 LU 102165B1 LU 102165 A LU102165 A LU 102165A LU 102165 A LU102165 A LU 102165A LU 102165 B1 LU102165 B1 LU 102165B1
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- 238000002474 experimental method Methods 0.000 title claims abstract description 165
- 238000002407 reforming Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000035939 shock Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 239000003292 glue Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/317—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by electromagnetic means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/0242—With circulation of a fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The present invention discloses a high-voltage pulse discharge fracturing experiment platform for reforming oil and gas reservoirs, including a high-voltage power supply, a charging capacitor, a discharge electrode, a fixed electrode holder, an underwater pressure sensor, a pressure collection charge amplifier, a pressure analyzer, strain gauges, a strain collector, a strain analysis computer, an experiment water tank, an experiment specimen, an unconstrained specimen fixing support, a constrained specimen fixing support, and constrained pressurization sheets. The present invention can increase the constraining forces in an axial direction and a horizontal direction, so as to further study the properties of oil and gas reservoir experiment test blocks under the action of high-voltage pulse discharge shock waves in the presence of ground stress constraints.
Description
HIGH-VOLTAGE PULSE DISCHARGE FRACTURING EXPERIMENT "°°° PA Technical Field | The present invention relates to a high-voltage pulse hydraulic-electric impact generator, | in particular to a high-voltage pulse discharge fracturing experiment platform for reforming | oil and gas reservoirs. | Related Art | With the massive exploitation of oil and gas resources, most of the resources have | already encountered a development bottleneck period, the permeability of oil and gas , reservoir pores is getting worse, and the exploitation is getting more and more difficult, | resulting in a sharp decline in yield of the oil and gas resources. It is extremely urgent to find | an effective method to reform oil and gas reservoirs and increase their permeability. The | commonly used reforming means is the hydraulic fracturing technology. However, the | hydraulic fracturing technology has very high requirements for high-pressure water pumps. | At the same time, during fracturing, proppants, such as quartz sand, will be added to the | fracturing water, which will also cause certain pollution to the oil and gas reservoirs. The | high-voltage pulse discharge shock wave technology has begun to emerge in recent years. It | has the characteristics of no pollution, good permeability enhancement effect and little .
damage to reservoirs. However, the study on the properties of shock waves is not in-depth, | and especially, the mechanism of fracturing caused by shock waves acting on oil and gas | reservoirs and the aspect of the quantitative permeability enhancement effect still need a lot | of experiment studies. | High-voltage pulse discharge fractures oil and gas reservoirs. In practical applications, | the discharge electrode will move to the next operating point for acting after acting at one | operating point. Thus, in a laboratory, how to realize the fracturing effect of experiment test | blocks after acting at different operating points, and how many times each operating point | can be used to save energy and play a good role in enhancing permeability, all of these | require further detailed study on rock mass of the oil and gas reservoirs under the action of | high-voltage discharge shock waves. | It is relatively difficult to realize the method of implementing fracturing measures and : detecting the permeability enhancement effect at the same time. Generally, experiment | specimens are measured before and after fracturing to reflect the effectiveness of fracturing LU102165 | measures, such as the ultrasonic detection method, but it is not suitable for high-voltage | electrical pulse experiments that can be detected simultaneously, such as the acoustic | emission technology. Therefore, a method of surface strain detection is simple and easy. | For previous studies, experiment test blocks are generally in a free state. In this test | device, the constraining forces in an axial direction and a horizontal direction can be | increased, so as to further study the properties of oil and gas reservoir experiment test blocks | under the action of high-voltage pulse discharge shock waves in the presence of ground | stress constraints. | SUMMARY | In view of the defects in the prior art, an objective of the present invention is to provide | a high-voltage pulse discharge fracturing experiment platform for reforming oil and gas | reservoirs. The constraining forces in an axial direction and a horizontal direction can be | increased, so as to further study the properties of oil and gas reservoir experiment test blocks | under the action of high-voltage pulse discharge shock waves in the presence of ground | stress constraints. | The objective of the present invention can be realized through the following technical | solutions: | A high-voltage pulse discharge fracturing experiment platform for reforming oil and gas | reservoirs includes a high-voltage power supply, a charging capacitor, a discharge electrode, | a fixed electrode holder, an underwater pressure sensor, a pressure collection charge | amplifier, a pressure analyzer, strain gauges, a strain collector, a strain analysis computer, an | experiment water tank, an experiment specimen, an unconstrained specimen fixing support, a | constrained specimen fixing support, and constrained pressurization sheets. : .
The experiment specimen is subjected to a discharge fracturing experiment through the | discharge electrode. The experiment specimen is placed on the support and the constrained : specimen fixing support for the experiment. The support and the constrained specimen fixing ; support are fixed in the experiment water tank for placing the experiment specimen. The | underwater pressure sensor is placed in the experiment water tank and maintains the same ; level as the experiment specimen and the discharge electrode, so as to measure a pressure | value of an impact specimen in the impact experiment. | The experiment water tank is a reaction site for impact fracturing of oil and gas Ë reservoirs.
The strain gauges in horizontal and vertical directions are pasted on upper, rear LU102165 | and left surfaces of the experiment specimen, so as to facilitate the measurement of a strain | value of the experiment specimen in the experiment.
The discharge electrode is fixed on the | holder, and the adjustment of a relative distance between the discharge electrode and the | experiment specimen is completed by means of combination of the discharge electrode and | the holder, so as to facilitate the further completion of the impact fracturing experiment. |
Inner sides of the strain gauges need to be coated with AB glue so as to be in close | contact with the experiment specimen, outer sides of the strain gauges need to be coated with | glass glue so as to make the strain gauges waterproof, and the strain gauges are arranged in a |
"T" shape horizontally and vertically. | À pressure test system is capable of synchronously measuring a pressure value of the | discharge electrode generating shock waves against the experiment specimen at equal | distance, and the underwater pressure sensor is connected to the pressure collection charge | amplifier and the pressure analyzer for collection and analysis of pressure data. |
The unconstrained specimen fixing support is capable of realizing an impact property | experiment in a free state.
The constrained specimen fixing support is capable of | pressurizing the experiment specimen by vertically and horizontally tightening screws to | push the constrained pressurization sheets, so as to realize an experiment study under | constrained conditions for the experiment specimen.
The constrained specimen fixing | support is not closed on only one surface being under the action of shock waves, and the - other five surfaces are completely closed.
The unconstrained specimen fixing support is just . the opposite, there is only a horizontal fixed surface and a vertical rear fixed surface in the | position of the experiment specimen, and the other surfaces are unconstrained and are in an . open state. | In the impact experiment, the unconstrained specimen fixing support and the constrained \ specimen fixing support are capable of being switched freely in the experiment water tank. | When an unconstrained impact experiment is studied, the experiment specimen is placed on | the fixing support for the experiment.
When a constrained impact experiment is studied, the | experiment specimen is placed on the constrained specimen fixing support for the | experiment. | The discharge electrode is capable of being moved for the adjustment of vertical and | horizontal distances by cooperating with the fixed holder, so as to facilitate further | experiment studies. LU102165 | The discharge electrode is connected to the charging capacitor and the high-voltage | power supply through high-voltage cables, the high-voltage power supply charges the | charging capacitor until the charging capacitor is charged to a set voltage value, and the | discharge electrode releases electrical energy to complete conversion of the electrical energy | to mechanical energy, thereby performing the impact fracturing experiment on the | experiment specimen. | The strain gauges are connected to the strain analysis computer through the strain | collector for collection and analysis of experiment data, and the underwater pressure sensor | and the pressure collection charge amplifier are connected to the pressure analyzer for | collection and analysis of the experiment data. | The present invention has the following beneficial effects: |
1. The present invention can analyze the properties of shock waves generated by | high-voltage pulse discharge, so as to provide a theoretical basis for subsequent study on the | regularity of the shock waves acting on specimens. .
2. The present invention can analyze the impact properties of high-voltage pulse . discharge on different rock specimens of oil and gas reservoirs, analyze optimal discharge ; impact parameters of different specimens, analyze the relationship between the surface strain | of the experiment specimen and the generation and expansion change of internal cracks, and | compare and analyze the study of different laws of high-voltage impact specimens under Ê unconstrained and constrained conditions. |
3. The present invention can analyze the fracturing effects of experiment test blocks | after different discharge voltages, several times of action at the same position and several | times of action at different positions, so as to obtain optimal pulse discharge combination .
parameters, thereby providing a theoretical basis for field applications for reformation of oil | and gas reservoirs, perfecting a theoretical system of the technology for reformation of oil | and gas reservoirs, and forming an oil and gas reservoir reforming technology that is more in | line with objective laws and has large-scale industrial application values. | To describe the technical solutions in the embodiments of the present invention or in the | prior art more clearly, the accompanying drawings required for describing the embodiments | or the prior art are briefly described below. Apparently, a person of ordinary skill in the art | may still derive other drawings from these accompanying drawings without creative efforts. LU102165 | FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the | present invention. | FIG. 2 is a schematic diagram of a pasting manner of strain gauges on an experiment | specimen according to an embodiment of the present invention. | FIG. 3 is a schematic structural diagram of a fixing support for an unconstrained fixed | experiment specimen according to an embodiment of the present invention. | FIG. 4 is a schematic diagram of an impact direction for an unconstrained fixed | experiment specimen according to an embodiment of the present invention. | FIG. 5 is a schematic structural diagram of a fixing support for a constrained fixed | experiment specimen according to an embodiment of the present invention. | FIG. 6 is a schematic diagram of an impact direction for a constrained fixed experiment | specimen according to an embodiment of the present invention. | FIG. 7 is a cross-sectional diagram in a direction A-A of FIG. 4. .
FIG. 8 is a schematic structural diagram of a discharge electrode according to an | embodiment of the present invention. .
FIG. 9 is a schematic diagram of a holder structure for fixing a discharge electrode | according to an embodiment of the present invention. | FIG. 10 is a cross-sectional diagram in a direction B-B of FIG, 1. | The technical solutions in the embodiments of the present invention are clearly and | completely described below with reference to the accompanying drawings in the . embodiments of the present invention. Apparently, the described embodiments are merely | some rather than all of the embodiments of the present invention. All other embodiments \ obtained by a person of ordinary skill in the art based on the embodiments of the present | invention without creative efforts shall fall within the protection scope of the present | invention. | According to FIG. 1 to FIG. 8, a high-voltage pulse discharge fracturing experiment | platform for reforming oil and gas reservoirs includes a high-voltage power supply 1, a | charging capacitor 2, a discharge electrode 3, a fixed electrode holder 4, an unconstrained | specimen fixing support 13, a constrained specimen fixing support 14, an experiment water | tank 11, an underwater pressure sensor 5, a pressure collection charge amplifier 6, a pressure | analyzer 7, strain gauges 8, a strain collector 9 and a strain analysis computer 10. LU102165 | The experiment specimen 12 is subjected to a discharge fracturing experiment through A the discharge electrode 3. The experiment specimen 12 is placed on the unconstrained | specimen fixing support 13 and the constrained specimen fixing support 14 for the | experiment. The unconstrained specimen fixing support 13 and the constrained specimen | fixing support 14 are fixed in the experiment water tank 11 for placing the experiment | specimen 12. The unconstrained specimen fixing support 13 is capable of realizing an impact | property experiment in a free state. The constrained specimen fixing support 14 is capable of | pressurizing the experiment specimen 12 by vertically and horizontally tightening screws to | push the constrained pressurization sheets 15, so as to realize an experiment study under | constrained conditions for the experiment specimen. The constrained specimen fixing | support 14 is not closed on only one surface being under the action of shock waves, and the | other five surfaces are completely closed. The unconstrained specimen fixing support 13 is | just the opposite, there is only a horizontal fixed surface and a vertical rear fixed surface in | the position of the experiment specimen, and the other surfaces are unconstrained and are in | an open state. | The underwater pressure sensor 5 is placed in the experiment water tank 11 and | maintains the same level as the experiment specimen 12 and the discharge electrode 3, so as | to measure a pressure value of an impact specimen in the impact experiment. The ; experiment water tank 11 is a reaction site for impact fracturing of oil and gas reservoirs. | The strain gauges 8 in horizontal and vertical directions are pasted on upper, rear and left | surfaces of the experiment specimen 12, so as to facilitate the measurement of a strain value | of the experiment specimen 12 in the experiment. The discharge electrode 3 is fixed on the | holder 4. The adjustment of a relative distance between the discharge electrode 3 and the .
experiment specimen 12 is completed by means of combination of the discharge electrode 3 | and the holder 4, so as to facilitate the further completion of the impact fracturing | experiment. It should be noted that inner sides of the strain gauges 8 need to be coated with | AB glue so as to be in close contact with the experiment specimen 12, outer sides of the | strain gauges 8 need to be coated with glass glue so as to make the strain gauges 8 | waterproof, and the strain gauges 8 are arranged in a "T" shape horizontally and vertically. | A pressure test system is capable of synchronously measuring a pressure value of the | discharge electrode 3 generating shock waves against the experiment specimen 12 at equal | distance, and the underwater pressure sensor 5 is connected to the pressure collection charge LU102165 | amplifier 6 and the pressure analyzer 7 for collection and analysis of pressure data. The | discharge electrode 3 is capable of being moved for the adjustment of vertical and horizontal | distances by cooperating with the fixed holder 4, so as to facilitate further experiment studies. | The discharge electrode 3 is connected to the charging capacitor 2 and the high-voltage | power supply 1 through high-voltage cables, the high-voltage power supply 1 charges the | charging capacitor 2 until the charging capacitor 2 is charged to a set voltage value, and the | discharge electrode 3 releases electrical energy to complete conversion of the electrical | energy to mechanical energy, thereby performing the impact fracturing experiment on the | experiment specimen 12. | The strain gauges 8 are connected to the strain analysis computer 10 through the strain | collector 9 for collection and analysis of experiment data, and the underwater pressure sensor | 5 and the pressure collection charge amplifier 6 are connected to the pressure analyzer 7 for | collection and analysis of the experiment data. | In the impact experiment, the unconstrained specimen fixing support 13 and the | constrained specimen fixing support 14 are capable of being switched freely in the | experiment water tank 11. When an unconstrained impact experiment is studied, the | experiment specimen 12 is placed on the unconstrained specimen fixing support 13 for the | experiment. When a constrained impact experiment is studied, the experiment specimen 12 É is placed on the constrained specimen fixing support 14 for the experiment. | An embodiment is listed below to further illustrate the present invention: | Embodiment .
During a shock wave experiment, a tank of clean water is filled in the experiment water | tank 11, and a type of oil and gas reservoir rock experiment specimen 12 is selected. Firstly, : an unconstrained impact experiment is performed. The experiment specimen 12 is fixed on | the unconstrained specimen fixing support 13. The relative distance between the discharge | electrode 3 and the experiment specimen 12 is adjusted. After the distance is determined, the | measuring distance of the underwater pressure sensor 5 is adjusted to ensure that the distance } between the underwater pressure sensor 5 and the discharge electrode 3 is the same as the ; distance between the experiment specimen 12 and the discharge electrode 3 and that the | underwater pressure sensor, the discharge electrode and the experiment specimen are | positioned on the same level. The pressure collection charge amplifier 6, the pressure | analyzer 7, the strain collector 9 and the strain analysis computer 10 are debugged, and after-U102165 | the measuring devices are debugged, the impact experiment can be performed. Then, a .
constrained impact experiment can be performed. The experiment specimen 12 is placed in © the constrained specimen fixing support 14, screws are tightened to make the constrained .
pressurization sheets 15 apply constraints on the experiment specimen 12 to maintain the .
same distance relationship as the unconstrained experiment, so as to perform the constrained | impact experiment. The two experiments are compared to perform related study works. | In the above experiment, in the process of pasting the strain gauges 8 on the surface of .
the experiment specimen 12, two strain gauges 8 in horizontal and vertical directions need to | be respectively pasted on three mutually perpendicular surfaces of the experiment specimen .
12, the two strain gauges 8 form a "T" shape, only AB glue is used when the strain gauges 8 | are pasted, close contact between the strain gauges 8 and the experiment specimen 12 needs Ê to be ensured, and after the strain gauges 8 are pasted, the outer surfaces of the strain gauges .
8 need to be coated with glass glue to make the strain gauges 8 waterproof, thereby ensuring | the successful collection of strain data. | In the above experiment, the adjustment of the relative distance between the discharge | electrode 3 and the experiment specimen 12 is realized by slide of hooks welded at different : distances on the discharge electrode 3, and the adjustment of different hook hangers | corresponding to the hooks can realize impact experiments on different action points of the Ë experiment specimen 12. | In the descriptions of this specification, a description of a reference term such as "an | embodiment", "an example", or "a specific example" means that a specific feature, structure, | material, or characteristic that is described with reference to the embodiment or the example : is included in at least one embodiment or example of the present invention. In this | specification, exemplary descriptions of the foregoing terms do not necessarily refer to a | same embodiment or example. In addition, the described specific features, structures, | materials, or features can be combined in a proper manner in any one or more embodiments | or examples. | The basic principles, main features and advantages of the present invention have been | shown and described above. A person skilled in the art should understand that the present | invention is not limited by the foregoing embodiments, descriptions in the foregoing embodiments and the specification merely describe the principles of the present invention, ee ESS PA A EE various changes and improvements may be made to the present invention without departing LU102165 | from the spirit and scope of the present invention, and such changes and improvements shall | all fall within the protection scope of the present invention. |
Claims (8)
1. A high-voltage pulse discharge fracturing experiment platform for reforming oil and | gas reservoirs, comprising a high-voltage power supply (1), a charging capacitor (2), a | discharge electrode (3), a fixed electrode holder (4), an underwater pressure sensor (5), a | pressure collection charge amplifier (6), a pressure analyzer (7), strain gauges (8), a strain | collector (9), a strain analysis computer (10), an experiment water tank (11), an experiment | specimen (12), an unconstrained specimen fixing support (13), a constrained specimen fixing | support (14), and constrained pressurization sheets (15); | the experiment specimen (12) is subjected to a discharge fracturing experiment through | the discharge electrode (3); the experiment specimen (12) is placed on the support (13) and | the constrained specimen fixing support (14) for the experiment; the support (13) and the | constrained specimen fixing support (14) are fixed in the experiment water tank (11) for | placing the experiment specimen (12); and the underwater pressure sensor (5) is placed in | the experiment water tank (11) and maintains the same level as the experiment specimen (12) | and the discharge electrode (3), so as to measure a pressure value of an impact specimen in | the impact experiment; and | the experiment water tank (11) is a reaction site for impact fracturing of oil and gas | reservoirs; the strain gauges (8) in horizontal and vertical directions are pasted on upper, rear .
and left surfaces of the experiment specimen (12), so as to facilitate the measurement of a ; strain value of the experiment specimen (12) in the experiment; and the discharge electrode ; (3) is fixed on the holder (4), and the adjustment of a relative distance between the discharge | electrode (3) and the experiment specimen (12) is completed by means of combination of the | discharge electrode (3) and the holder (4), so as to facilitate the further completion of the | impact fracturing experiment. |
2. The high-voltage pulse discharge fracturing experiment platform for reforming oil Ë and gas reservoirs according to claim 1, wherein inner sides of the strain gauges (8) need to | be coated with AB glue so as to be in close contact with the experiment specimen (12), outer | sides of the strain gauges (8) need to be coated with glass glue so as to make the strain : gauges (8) waterproof, and the strain gauges (8) are arranged in a "T" shape horizontally and | vertically. |
3. The high-voltage pulse discharge fracturing experiment platform for reforming oil | and gas reservoirs according to claim 1, wherein a pressure test system is capable of 102165 | synchronously measuring a pressure value of the discharge electrode (3) generating shock © waves against the experiment specimen (12) at equal distance, and the underwater pressure | sensor (5) is connected to the pressure collection charge amplifier (6) and the pressure Ë analyzer (7) for collection and analysis of pressure data. |
4. The high-voltage pulse discharge fracturing experiment platform for reforming oil | and gas reservoirs according to claim 1, wherein the unconstrained specimen fixing support | (13) is capable of realizing an impact property experiment in a free state; the constrained ! specimen fixing support (14) is capable of pressurizing the experiment specimen (12) by | vertically and horizontally tightening screws to push the constrained pressurization sheets , (15), so as to realize an experiment study under constrained conditions for the experiment | specimen; the constrained specimen fixing support (14) is not closed on only one surface ' being under the action of shock waves, and the other five surfaces are completely closed; and | the unconstrained specimen fixing support (13) is just the opposite, there is only a horizontal | fixed surface and a vertical rear fixed surface in the position of the experiment specimen, and | the other surfaces are unconstrained and are in an open state. |
5. The high-voltage pulse discharge fracturing experiment platform for reforming oil | and gas reservoirs according to claim 1, wherein in the impact experiment, the unconstrained | specimen fixing support (13) and the constrained specimen fixing support (14) are capable of / being switched freely in the experiment water tank (11); when an unconstrained impact | experiment is studied, the experiment specimen (12) is placed on the unconstrained | specimen fixing support (13) for the experiment; and when a constrained impact experiment | is studied, the experiment specimen (12) is placed on the constrained specimen fixing | support (14) for the experiment. |
6. The high-voltage pulse discharge fracturing experiment platform for reforming oil / and gas reservoirs according to claim 1, wherein the discharge electrode (3) is capable of | being moved for the adjustment of vertical and horizontal distances by cooperating with the fixed holder (4), so as to facilitate further experiment studies.
7. The high-voltage pulse discharge fracturing experiment platform for reforming oil and gas reservoirs according to claim 1, wherein the discharge electrode (3) is connected to | the charging capacitor (2) and the high-voltage power supply (1) through high-voltage cables, the high-voltage power supply (1) charges the charging capacitor (2) until the charging capacitor (2) is charged to a set voltage value, and the discharge electrode (3) releases LU102165 | electrical energy to complete conversion of the electrical energy to mechanical energy, | thereby performing the impact fracturing experiment on the experiment specimen (12). |
8. The high-voltage pulse discharge fracturing experiment platform for reforming oil | and gas reservoirs according to claim 1, wherein the strain gauges (8) are connected to the | strain analysis computer (10) through the strain collector (9) for collection and analysis of | experiment data, and the underwater pressure sensor (5) and the pressure collection charge | amplifier (6) are connected to the pressure analyzer (7) for collection and analysis of the | experiment data. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911151306.6A CN110823727A (en) | 2019-11-21 | 2019-11-21 | High-voltage pulse discharge fracturing experimental platform for reforming oil and gas reservoir |
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