CN111595756A - Rock core damage comprehensive evaluation device - Google Patents
Rock core damage comprehensive evaluation device Download PDFInfo
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- CN111595756A CN111595756A CN202010630386.XA CN202010630386A CN111595756A CN 111595756 A CN111595756 A CN 111595756A CN 202010630386 A CN202010630386 A CN 202010630386A CN 111595756 A CN111595756 A CN 111595756A
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- 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
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- 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
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention discloses a core damage comprehensive evaluation device which comprises a rack, and a plurality of solution tanks, a core holder, a continuous flow displacement unit, a confining pressure unit, an acid quantitative unit and a back pressure unit which are arranged on the rack, wherein the solution tanks are arranged on the rack; the solution tank is filled with a testing fluid for testing permeability, the core holder is detachably mounted on the frame, and the core holder is provided with a first injection flow channel, a second injection flow channel and a confining pressure injection flow channel; the continuous flow displacement unit is used for displacing the double pumps to inject the fluid in the liquid storage tank and the alkali liquor container into the first injection flow channel; the confining pressure unit is used for injecting fluid in the confining pressure liquid container into the confining pressure injection flow channel by a confining pressure single pump; the acid quantitative unit is used for injecting the fluid in the acid liquid container into the second injection flow passage by the acid quantitative pump; and the back pressure unit is communicated with the second injection runner and provides back pressure for the core holder. Through the mode, the rock core damage comprehensive evaluation device can finish various damage tests on the same device, and is simple in structure and convenient to use.
Description
Technical Field
The invention relates to the field of core damage evaluation tests, in particular to a comprehensive core damage evaluation device.
Background
The stratum damage evaluation instrument is oil layer protection evaluation experimental equipment which is most widely applied in the petroleum exploitation industry. At present, the instruments for formation damage evaluation at home and abroad mainly comprise a core flow experimental instrument, a core dynamic damage system and a high-temperature high-pressure dynamic damage evaluation system.
The core damage test comprises the tests of flow rate sensitivity, water sensitivity, salinity sensitivity, alkali sensitivity, acid sensitivity, stress sensitivity and the like. The existing core dynamic damage system cannot carry out various different tests under the same set of equipment and cannot meet the test requirements.
Disclosure of Invention
The invention mainly solves the technical problem of providing a rock core damage comprehensive evaluation device which can finish various damage tests on the same device and has simple structure and convenient use.
In order to solve the technical problems, the invention adopts a technical scheme that: the core damage comprehensive evaluation device comprises a rack, and a plurality of solution tanks, a core holder, a continuous flow displacement unit, a confining pressure unit, an acid metering unit and a back pressure unit which are arranged on the rack; the core holder is detachably mounted on the frame, a core is clamped in the core holder, and the core holder is provided with a first injection flow channel, a second injection flow channel and a confining pressure injection flow channel; the continuous flow displacement unit comprises a displacement double pump for providing continuous flow, the displacement double pump is respectively communicated with the liquid storage tank and the alkali liquor container, and fluid in the liquid storage tank and the alkali liquor container is injected into the first injection flow channel; the confining pressure unit comprises a confining pressure single pump and a confining pressure liquid container, and the confining pressure single pump injects fluid in the confining pressure liquid container into the confining pressure injection flow passage; the acid quantitative unit comprises an acid quantitative pump and an acid liquid container, and the acid quantitative pump injects the fluid in the acid liquid container into the second injection flow passage; and the back pressure unit is communicated with the second injection runner and provides back pressure for the core holder.
In a preferred embodiment of the present invention, a peristaltic pump and a high-pressure container are further connected between the solution tank and the dual displacement pump, the test fluid in the solution tank enters the high-pressure container through the peristaltic pump, and the dual displacement pump injects the test fluid in the high-pressure container into the first injection flow channel.
In a preferred embodiment of the invention, a piston intermediate container is further mounted between the displacement double pump and the core holder, and a displacement sensor is connected to the piston intermediate container.
In a preferred embodiment of the present invention, a multi-stage electric heater is further installed between the first injection flow passage and the piston intermediate container and the high pressure container.
In a preferred embodiment of the invention, an electric heating sleeve is sleeved on the outer side of the core holder, and the left end and the right end of the core holder are arranged on a support of the frame in a matching manner.
In a preferred embodiment of the invention, a first differential pressure gauge and a second differential pressure gauge are provided at both ends of the core holder.
In a preferred embodiment of the present invention, filters are disposed at both ends of the second injection flow path.
In a preferred embodiment of the invention, the test fluid in the solution tank comprises an initial fluid and an intermediate fluid for performing a flow rate sensitivity test, a salinity sensitivity test and a water sensitivity test.
In a preferred embodiment of the invention, the solution tanks are all provided with liquid level meters.
The invention has the beneficial effects that: the rock core damage comprehensive evaluation device can complete various damage tests on the same device, and is simple in structure and convenient to use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic perspective view of a core damage comprehensive evaluation apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a rear view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a schematic view of a portion of the structure of FIG. 1;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a schematic diagram of the apparatus for comprehensive evaluation of core damage;
the parts in the drawings are numbered as follows: 1. The device comprises a frame, 11, a support, 2, a solution tank, 3, a core holder, 31, a first injection flow channel, 32, a second injection flow channel, 33, a confining pressure injection flow channel, 34, an electric heating sleeve, 35, a first differential pressure gauge, 36, a second differential pressure gauge, 37, a filter, 4, a continuous flow displacement unit, 41, a displacement double pump, 42, an alkali liquor container, 43, a peristaltic pump, 44, a high-pressure container, 45, a piston middle container, 46, a displacement sensor, 47, an electric heater, 5, a confining pressure unit, 51, a confining pressure pump, 52, a confining pressure liquid container, 6, an acid metering unit, 61, an acid metering pump, 62, an acid liquor container, 7, a back pressure unit, 71 and a back pressure pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6 (the pipeline, valve and other parts for fluid flow are not shown in the figures), a core damage comprehensive evaluation device comprises a frame 1, and a plurality of solution tanks 2, a core holder 3, a continuous flow displacement unit 4, a confining pressure unit 5, an acid metering unit 6 and a back pressure unit 7 which are arranged on the frame; the core holder 3 is detachably mounted on the frame 1, a core is clamped in the core holder 3, and the core holder 3 is provided with a first injection runner 31, a second injection runner 32 and a confining pressure injection runner 33; the continuous flow displacement unit comprises a displacement double pump 41 for providing continuous flow, the displacement double pump 41 is respectively communicated with the liquid storage tank 2 and the alkali liquor container 42, and the fluid in the liquid storage tank 2 and the fluid in the alkali liquor container 42 are injected into the first injection flow channel 31; the confining pressure unit 5 comprises a confining pressure single pump 51 and a confining pressure liquid container 52, wherein the confining pressure single pump 51 injects the fluid in the confining pressure liquid container 52 into the confining pressure injection flow passage 33; an acid dosing unit 6 including an acid dosing pump 61 and an acid liquid container 62, the acid dosing pump 61 injecting the fluid in the acid liquid container 6 into the second injection flow passage 32; and the back pressure unit 7 is communicated with the second injection runner 32, and provides back pressure for the core holder 3.
In addition, a peristaltic pump 43 and a high-pressure container 44 are connected between the solution tank 2 and the dual displacement pump 41, the test fluid in the solution tank 2 enters the high-pressure container 44 through the peristaltic pump 43, and the dual displacement pump 41 injects the test fluid in the high-pressure container 44 into the first injection flow channel 31.
In addition, a piston intermediate container 45 is also mounted between the displacement double pump 41 and the core holder 3, and a displacement sensor 46 is connected to the piston intermediate container 45.
Further, a multi-stage electric heater 47 is installed between the first injection flow path 31 and the piston intermediate tank 45 and the high-pressure tank 44.
In addition, the outer side of the core holder 3 is sleeved with an electric heating sleeve 34, the left end and the right end of the core holder 3 are arranged on the support 11 of the frame 1 in a matching mode, and the core holder 3 needs to be replaced every time different tests are carried out.
In addition, a first differential pressure gauge 35 and a second differential pressure gauge 36 are provided at both ends of the core holder 3.
In addition, filters 37 are provided at both ends of the second injection flow passage 32.
In addition, the test fluid in the solution tank 2 comprises an initial fluid and an intermediate fluid for performing a flow rate sensitivity test, a salinity sensitivity test and a water sensitivity test, the initial fluid and the intermediate fluid are set according to various test requirements, and the specific selection can refer to a reservoir sensitivity test evaluation method.
In addition, a liquid level meter is arranged in each solution tank 2.
The concrete working principle of the core damage comprehensive evaluation device is as follows:
flow rate sensitivity test: installing a rock core holder 3 with a rock core on a frame 1, driving a double pump 41 to start, continuously injecting a test fluid in a solution tank 2 into a first injection runner 31 at a certain flow rate, wherein the flow rate is 0.1ml/min-6ml/min, researching the influence of particle migration on the rock core permeability through the forward and reverse permeability change of the rock core, and taking down the rock core holder after the test is finished;
stress sensitivity test: replacing a new rock core holder 3, then adjusting the pressure of the back pressure unit 5 or the confining pressure unit 7 to perform a test to obtain a test result, and taking down the rock core holder after the test is completed;
water sensitivity test: and (3) replacing a new rock core holder 3, measuring the initial fluid permeability of the rock core by adopting the initial fluid, displacing by using the intermediate fluid, keeping the displacement speed consistent with the initial flow rate, displacing by 10-15 times of the void volume of the rock core, informing the displacement, keeping the confining pressure and the temperature unchanged, enabling the intermediate fluid to react with the rock core for more than 12 hours, adjusting the flow rate of the displacement double pump 41 to the initial flow rate, displacing by using the intermediate fluid, measuring the permeability, and taking down the rock core holder after the test is finished.
Salinity sensitivity test: and (3) replacing a new rock core holder 3, measuring the initial fluid permeability of the rock core by adopting the initial fluid, displacing by using the intermediate fluid, keeping the displacement speed consistent with the initial flow rate, displacing by 10-15 times of the void volume of the rock core, informing the displacement, keeping the confining pressure and the temperature unchanged, enabling the intermediate fluid to react with the rock core for more than 12 hours, adjusting the flow rate of the displacement double pump 41 to the initial flow rate, displacing by using the intermediate fluid, measuring the permeability, and taking down the rock core holder after the test is finished.
Acid sensitivity test: and (3) replacing a new rock core holder 3, measuring the initial fluid permeability of the rock core by adopting the initial fluid, injecting the acid liquor in the acid liquor container 62 in the reverse direction through the second injection flow passage 32 by using the acid metering pump 61, injecting the acid liquor with 1-1.5 times of the pore volume to ensure that the reaction time of the rock core and the acid liquor is 1h, closing the acid metering pump 31, measuring the liquid permeability of the acid-treated rock core by positively displacing the intermediate solution, and taking down the rock core holder after the test is finished.
Alkali sensitivity test: and (3) replacing a new rock core holder 3, measuring the initial fluid permeability of the rock core by adopting the initial fluid, reversely injecting the alkali liquor in the alkali liquor container 42 through the second injection flow channel 32 by the displacement double pump 41, injecting 10-15 times of pore volume alkali liquor to ensure that the reaction time of the rock core and the alkali liquor is 12h, displacing by using the pH value alkali liquor, measuring the liquid permeability, and sequentially injecting the alkali liquor from low to high until the pH value is increased to 13.
Different from the prior art, the rock core damage comprehensive evaluation device can complete various damage tests on the same device, and is simple in structure and convenient to use.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A core damage comprehensive evaluation device is characterized by comprising a rack, and a plurality of solution tanks, a core holder, a continuous flow displacement unit, a confining pressure unit, an acid quantitative unit and a back pressure unit which are arranged on the rack;
a plurality of solution tanks containing a test fluid for testing permeability;
the core holder is detachably mounted on the frame, a core is clamped in the core holder, and the core holder is provided with a first injection flow channel, a second injection flow channel and a confining pressure injection flow channel;
the continuous flow displacement unit comprises a displacement double pump for providing continuous flow, the displacement double pump is respectively communicated with the liquid storage tank and the alkali liquor container, and fluid in the liquid storage tank and the alkali liquor container is injected into the first injection flow channel;
the confining pressure unit comprises a confining pressure single pump and a confining pressure liquid container, and the confining pressure single pump injects fluid in the confining pressure liquid container into the confining pressure injection flow passage;
the acid quantitative unit comprises an acid quantitative pump and an acid liquid container, and the acid quantitative pump injects the fluid in the acid liquid container into the second injection flow passage;
and the back pressure unit is communicated with the second injection runner and provides back pressure for the core holder.
2. The core damage comprehensive evaluation device according to claim 1, wherein a peristaltic pump and a high-pressure container are further connected between the solution tank and the displacement double pump, the test fluid in the solution tank enters the high-pressure container through the peristaltic pump, and the displacement double pump injects the test fluid in the high-pressure container into the first injection flow channel.
3. The core damage comprehensive evaluation device according to claim 2, wherein a piston intermediate container is further installed between the displacement double pump and the core holder, and a displacement sensor is connected to the piston intermediate container.
4. The core damage comprehensive evaluation device as claimed in claim 3, wherein a multi-stage electric heater is further installed between the first injection runner and the piston intermediate container and the high-pressure container.
5. The core injury comprehensive evaluation device according to claim 4, wherein an electric heating sleeve is sleeved outside the core holder, and the left end and the right end of the core holder are arranged on a support of the rack in a matched manner.
6. Core damage comprehensive evaluation device according to any of claims 1 to 5, characterized in that a first differential pressure gauge and a second differential pressure gauge are provided at both ends of the core holder.
7. The core damage comprehensive evaluation device as claimed in claim 6, wherein filters are disposed at both ends of the second injection flow passage.
8. The core damage comprehensive evaluation device as claimed in claim 7, wherein the test fluid in the solution tanks comprises an initial fluid and an intermediate fluid for performing a flow rate sensitivity test, a salinity sensitivity test and a water sensitivity test, and the solution tanks are arranged on the rack at intervals in sequence.
9. The core damage comprehensive evaluation device as claimed in claim 8, wherein a liquid level meter is arranged in each solution tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630386.XA CN111595756A (en) | 2020-07-03 | 2020-07-03 | Rock core damage comprehensive evaluation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630386.XA CN111595756A (en) | 2020-07-03 | 2020-07-03 | Rock core damage comprehensive evaluation device |
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| CN111595756A true CN111595756A (en) | 2020-08-28 |
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| CN202010630386.XA Pending CN111595756A (en) | 2020-07-03 | 2020-07-03 | Rock core damage comprehensive evaluation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092266A (en) * | 2021-03-18 | 2021-07-09 | 中国地质大学（北京） | Evaluation device and method for injury mechanism of slickwater fracturing fluid reservoir and storage medium |
-
2020
- 2020-07-03 CN CN202010630386.XA patent/CN111595756A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092266A (en) * | 2021-03-18 | 2021-07-09 | 中国地质大学（北京） | Evaluation device and method for injury mechanism of slickwater fracturing fluid reservoir and storage medium |
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