CN110927034A - Device and method for evaluating performance of plugging material - Google Patents
Device and method for evaluating performance of plugging material Download PDFInfo
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- CN110927034A CN110927034A CN201811091721.2A CN201811091721A CN110927034A CN 110927034 A CN110927034 A CN 110927034A CN 201811091721 A CN201811091721 A CN 201811091721A CN 110927034 A CN110927034 A CN 110927034A
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- simulation block
- cylinder
- fracture simulation
- cement
- annular sealing
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- 239000000463 material Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 50
- 239000004568 cement Substances 0.000 claims abstract description 49
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004575 stone Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 43
- 238000011156 evaluation Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 239000002195 soluble material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention provides a device and a method for evaluating the performance of a plugging material, wherein the device comprises: a high-temperature high-pressure water loss instrument and a stratum fracture simulation block; wherein: the high-temperature high-pressure water loss instrument comprises a hollow pulp cylinder and a lower cover positioned at the bottom of the pulp cylinder; the stratum fracture simulation block is positioned in the slurry cylinder and is positioned above the lower cover; the formation fracture simulation block includes set cement with holes and/or fractures. The method comprises the following steps: acquiring a stratum fracture simulation block, wherein the stratum fracture simulation block comprises a cement stone with holes and/or fractures; placing the stratum fracture simulation block on a lower cover of a high-temperature high-pressure water loss instrument, and filling the stratum fracture simulation block into a slurry cylinder; filling the plugging material into a slurry barrel, and installing an upper cover of a high-temperature high-pressure water loss instrument; heating the pulp barrel to a preset temperature value, and pressurizing to a preset pressure value; and evaluating the plugging performance of the plugging material by collecting slurry flowing out of a liquid discharge pipe of the lower cover. The invention has simple structure, convenient use and high reliability and can provide effective basis for optimizing the plugging material.
Description
Technical Field
The invention relates to the technical field of performance evaluation and test of plugging materials, in particular to a device and a method for evaluating the performance of a plugging material.
Background
At present, the types of plugging materials are increased day by day, the plugging materials are not only used for plugging drilling fluid while drilling, but also a plurality of plugging cement slurry systems are researched, and a plurality of devices for evaluating the performance of the plugging materials are invented. The evaluation method comprises the step of paving a loose leakage layer at the bottom of corresponding equipment by using sand grains, steel balls and the like to simulate a leakage stratum. The method has obvious compaction effect on the loose leaking layer, and can generate self-crack healing effect under the action of pressure, thereby obviously influencing the evaluation of the performance of the leaking stoppage material.
In addition, additional experimental equipment is needed when the performance evaluation experiment of the plugging material is carried out, so that how to realize the performance evaluation experiment of the plugging material by using the existing practical equipment is a difficult problem to be solved by the technical personnel in the field.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems of the prior art, the invention provides a device for evaluating the performance of a plugging material, which comprises: a high-temperature high-pressure water loss instrument and a stratum fracture simulation block; wherein:
the high-temperature high-pressure water loss instrument comprises a hollow pulp cylinder and a lower cover positioned at the bottom of the pulp cylinder;
the formation fracture simulation block is positioned in the slurry barrel and is positioned above the lower cover; the formation fracture simulation block comprises a set cement with holes and/or fractures.
Optionally, the formation fracture simulation block comprises an annular sealing cylinder, and the annular sealing cylinder is sleeved outside the set cement and is in contact with the inner wall of the slurry cylinder.
Optionally, the outer wall of the annular sealing cylinder is coated with a layer of lubricating grease.
Optionally, the annular sealing cylinder is composed of at least two lobe-shaped subsections.
Optionally, the pores and/or cracks of the set cement are formed by dissolving soluble materials under preset conditions.
Optionally, the cracks of the set cement are formed after combustion of a combustible material.
Optionally, the device for evaluating the performance of the leaking material comprises an iron ring arranged between the lower cover and the formation fracture simulation block.
The invention also provides a method for evaluating the performance of the leakage material, which comprises the following steps:
acquiring a stratum fracture simulation block, wherein the stratum fracture simulation block comprises a set cement with holes and/or fractures;
placing the stratum fracture simulation block on a lower cover of a high-temperature high-pressure water loss instrument, and filling the stratum fracture simulation block into a slurry cylinder;
filling a plugging material into the slurry barrel, and installing an upper cover of the high-temperature high-pressure water loss instrument; heating the pulp barrel to a preset temperature value, and pressurizing to a preset pressure value;
and evaluating the plugging performance of the plugging material by collecting slurry flowing out of a liquid discharge pipe of the lower cover.
Optionally, the obtaining the formation fracture simulation block includes:
mixing a material for forming holes and/or cracks with cement in an annular sealing cylinder, sleeving a cement curing cylinder outside the annular sealing cylinder, and forming a set cement with the holes and/or cracks under preset conditions;
and pushing out the cement stone with the holes and/or cracks and the annular sealing cylinder from the cement curing cylinder to obtain the formation crack simulation block.
Optionally, the obtaining the formation fracture simulation block includes:
mixing a material for forming holes and/or cracks with cement in an annular sealing cylinder, and forming a set cement with the holes and/or cracks under preset conditions; the annular sealing cylinder is integrally formed;
and taking the annular sealing cylinder and the cement stone with holes and/or cracks in the annular sealing cylinder as the stratum crack simulation block.
The invention provides a device and a method for evaluating the performance of a plugging material, which are convenient to operate on the basis of a high-temperature high-pressure water loss instrument of the existing laboratory equipment, can effectively simulate an underground leakage environment, and effectively evaluate the plugging effect of the plugging material, thereby achieving the evaluation device for optimizing the plugging material.
The features and content of these solutions will be better understood by those skilled in the art from reading the present description.
Drawings
The advantages and realisation of the invention will be more apparent from the following detailed description, given by way of example, with reference to the accompanying drawings, which are given for the purpose of illustration only, and which are not to be construed in any way as limiting the invention, and in which:
fig. 1 is an external structural view of a plugging material performance evaluation device according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a device for evaluating the performance of a plugging material according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a formation fracture simulation block in the apparatus for evaluating the performance of a plugging material according to the embodiment of the present invention;
fig. 4 is a schematic structural view of a cement sample curing mold according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, the present invention provides a device for evaluating the performance of a plugging material, comprising: a high-temperature high-pressure water loss instrument 10 and a formation fracture simulation block 20; wherein:
the high-temperature high-pressure water loss instrument 10 comprises a hollow pulp barrel 11, an upper cover 12, an air inlet pipe 13, a lower cover 14 and a liquid discharge pipe 15. Wherein, upper cover 12 sets up on the top of thick liquid section of thick bamboo 11, and intake pipe 13 passes upper cover 12 and is linked together with the inside of thick liquid section of thick bamboo 11, and intake pipe 13 is connected with external pressure providing system 41, external pressure providing system is the supporting nitrogen cylinder of high temperature high pressure water loss appearance, provides pressure for thick liquid section of thick bamboo through the intake pipe, simulation stratum high pressure environment. The temperature control system 42 is sleeved outside the slurry barrel 11 and used for heating the slurry barrel 11 and controlling the temperature to enable the temperature in the slurry barrel 11 to reach the corresponding formation temperature. Preferably, a strainer 16 may be further provided at the top end of the upper cover 12, and the strainer 16 prevents the gas supply line from being clogged due to slurry flowing up during the pressure release at the end of the evaluation test. A lower cover 14 is provided on the bottom of the pulp barrel 11, and a drain pipe 15 is provided through the lower cover 14. A ball valve switch 17 may be provided on the drain pipe 15. Generally, a slurry receiving cup 43 is provided below the drain pipe 15, and the performance of the plugging product can be evaluated by weighing the amount of leakage of the slurry receiving cup 43.
The formation fracture simulation block 20 is positioned in the slurry barrel and above the lower cover 14; the formation fracture simulation block 20 includes a set of cement 21 with holes and/or fractures. In this embodiment, an iron ring 30 is further provided between the lower cover 14 and the formation fracture simulation block 20, and the iron ring 30 can be obtained by removing a mesh with a filter screen.
In order to prevent the cement mortar 21 from being sealed with the inner wall of the mortar barrel, the formation fracture simulation block 20 comprises an annular sealing barrel 22 which is sleeved outside the cement mortar 21 and is in contact with the inner wall of the mortar barrel, so that an annular gap is filled. This annular sealing cylinder 22 can be used as the maintenance mould inner tube, utilizes annular sealing cylinder 22 to make stratum fracture analogue structure with the sealed laminating of working barrel to prevent that it is not enough to cause the slurry along little annular gap seepage, reduce experimental error, guarantee the accuracy of experimental result. The outer wall of the annular sealing cylinder 22 is coated with a lubricating grease layer to ensure that the annular sealing cylinder is smoothly placed into the pulp cylinder and the sealing effect of the micro-annular gap is fully ensured.
In one embodiment of the present invention, the annular sealing cylinder 22 is composed of at least two arc-shaped sub-portions, such as two or three segments, and when cement curing is performed, as shown in fig. 4, a cement curing cylinder 33 is further sleeved outside the annular sealing cylinder 22. The annular sealing cylinder 22 is composed of at least two arc subsections, which is convenient for disassembly and cleaning. Of course, the annular sealing cylinder 22 may be a hollow cylinder formed integrally, and in this case, a cement curing cylinder may not be provided.
In specific implementation, the holes and/or cracks of the set cement are formed by dissolving soluble materials under preset conditions; the preset conditions are, for example, high temperature and/or high pressure. Cracks in the set cement are formed by burning combustible materials, such as branches and the like.
The invention also provides a method for evaluating the performance of the leakage material, which comprises the following steps:
s1, obtaining a stratum fracture simulation block, wherein the stratum fracture simulation block comprises a set cement with holes and/or fractures;
s2, placing the stratum fracture simulation block on a lower cover of a high-temperature high-pressure water loss instrument, and filling the stratum fracture simulation block into a slurry cylinder;
s3, filling the plugging material into a slurry barrel, and installing an upper cover of a high-temperature high-pressure water loss instrument; heating the pulp barrel to a preset temperature value, and pressurizing to a preset pressure value;
and S4, evaluating the plugging performance of the plugging material by collecting slurry flowing out of a drain pipe of the lower cover.
More specifically, when the performance of the plugging material is evaluated, firstly, the cured cement stone sample and the annular sealing cylinder are taken out of the curing mould, a certain amount of lubricating grease is uniformly coated on the outer wall of the annular sealing cylinder, and then the filter screen iron ring arranged on the lower cover and the lower cover are installed in place. And then, filling 250mL of the well-maintained drilling fluid or leaking stoppage cement slurry mixed with the leaking stoppage material into a slurry barrel, installing an upper bottom cover and a filter screen in place, connecting an external pressure system and the slurry barrel, pressurizing the inlet air to 8MPa by a pressure gauge of the external pressure system, starting to heat the slurry barrel to the temperature consistent with the stratum by temperature program control, opening a spherical valve of the lower bottom cover when the temperature and the pressure meet the test requirements, enabling the slurry to flow through a crack channel of a cement stone sample, flowing into a slurry receiving cup arranged at the lower end through a liquid discharge pipe, and then weighing the leakage amount of the slurry to evaluate the performance of a leaking stoppage product.
In one embodiment of the present invention, the step S1 of obtaining the formation fracture simulation block includes:
s11, mixing materials for forming holes and/or cracks with cement in an annular sealing cylinder, sleeving a cement curing cylinder outside the annular sealing cylinder, and forming cement stones with the holes and/or cracks according to preset conditions;
the annular sealing cylinder can be composed of at least two arc subparts which are convenient to disassemble, assemble and clean; of course, the annular sealing cylinder can be of an integrally formed hollow cylindrical structure; the preset conditions are, for example, high temperature and/or high pressure.
And S12, pushing the cement stone with the holes and/or the cracks and the annular sealing cylinder out of the cement curing cylinder to obtain the formation crack simulation block.
In one embodiment of the present invention, the step S1 of obtaining the formation fracture simulation block includes:
s21, mixing materials for forming holes and/or cracks with cement in the annular sealing cylinder, and forming a set cement with the holes and/or cracks under preset conditions;
the above-mentioned preset conditions are, for example, high temperature and/or high pressure; in this embodiment, the annular sealing cylinder is integrally formed.
And S22, taking the annular sealing cylinder and the cement stone with holes and/or cracks in the annular sealing cylinder as a stratum crack simulation block.
According to the device and the method for evaluating the performance of the plugging material, the stratum fracture simulation block is placed into the slurry cylinder, the drilling fluid or the cement slurry containing the plugging material is placed into the slurry cylinder, the underground high-temperature and high-pressure environment is achieved by adjusting the pressure and the temperature, and the purpose of evaluating the performance of the plugging material is achieved by measuring the leakage amount of the slurry, so that favorable evaluation indexes are provided for optimizing the plugging material. The invention has simple structure, convenient use and high reliability; easy processing and low cost. The experimental result is simple and clear, and an effective basis is provided for optimizing the plugging material.
The invention utilizes the existing experimental equipment high-temperature high-pressure water loss instrument to complete the performance evaluation experiment of the new plugging material, is consistent with the operation method of the high-temperature high-pressure water loss experiment, is simple and reasonable, and is safe and reliable, and the experimental result is accurate. The heating outer cylinder and the external nitrogen cylinder matched with the high-temperature high-pressure water loss instrument can fully simulate the underground high-temperature high-pressure environment, and the accuracy of the experimental result is improved. The annular sealing cylinder processed according to the size of the slurry cylinder can completely avoid micro annular gaps between the sample and the slurry cylinder, so that slurry can only be filtered through gaps of a bottom simulation structure under the action of high temperature and high pressure, the experimental result is more accurate, and the evaluation effect is ensured. The annular sealing cylinder can also be used as an inner cylinder of a maintenance mould, and the original filter screen of the high-temperature and high-pressure water loss instrument and the simply-transformed outer edge iron ring of the filter screen are utilized, so that the sealing performance of the whole experimental slurry cylinder is not guaranteed, and the experimental safety is improved.
While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, those skilled in the art will appreciate that various modifications can be made to the present invention without departing from the scope and spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (10)
1. A lost circulation material performance evaluation device is characterized by comprising: a high-temperature high-pressure water loss instrument and a stratum fracture simulation block; wherein:
the high-temperature high-pressure water loss instrument comprises a hollow pulp cylinder and a lower cover positioned at the bottom of the pulp cylinder;
the formation fracture simulation block is positioned in the slurry barrel and is positioned above the lower cover; the formation fracture simulation block comprises a set cement with holes and/or fractures.
2. The apparatus for evaluating the performance of a leaking material according to claim 1, wherein the formation fracture simulation block comprises an annular sealing cylinder which is sleeved outside the set cement and is in contact with the inner wall of the slurry cylinder.
3. The leak material performance evaluation device as defined in claim 2, wherein an outer wall of the annular seal cylinder is coated with a lubricating grease layer.
4. The leak material performance evaluation device as defined in claim 2, wherein the annular seal cylinder is composed of at least two arc-shaped subsections.
5. The leak material performance evaluation device according to claim 1, wherein the pores and/or cracks of the set cement are formed by dissolving a soluble material under a predetermined condition.
6. The leak material performance evaluation device according to claim 1, wherein the crack of the set cement is formed by burning a combustible material.
7. The apparatus of claim 1, wherein the apparatus comprises an iron ring disposed between the lower cap and the formation fracture simulation block.
8. A method for evaluating the performance of a leakage material is characterized by comprising the following steps:
acquiring a stratum fracture simulation block, wherein the stratum fracture simulation block comprises a set cement with holes and/or fractures;
placing the stratum fracture simulation block on a lower cover of a high-temperature high-pressure water loss instrument, and filling the stratum fracture simulation block into a slurry cylinder;
filling a plugging material into the slurry barrel, and installing an upper cover of the high-temperature high-pressure water loss instrument; heating the pulp barrel to a preset temperature value, and pressurizing to a preset pressure value;
and evaluating the plugging performance of the plugging material by collecting slurry flowing out of a liquid discharge pipe of the lower cover.
9. The method for evaluating the performance of the leaking material according to claim 8, wherein the obtaining of the formation fracture simulation block comprises:
mixing a material for forming holes and/or cracks with cement in an annular sealing cylinder, sleeving a cement curing cylinder outside the annular sealing cylinder, and forming a set cement with the holes and/or cracks under preset conditions;
putting cement stone with holes and/or cracks and an annular sealing cylinder into the cement curing cylinder
And pushing out to obtain the stratum fracture simulation block.
10. The method for evaluating the performance of the leaking material according to claim 8, wherein the obtaining of the formation fracture simulation block comprises:
mixing a material for forming holes and/or cracks with cement in an annular sealing cylinder, and forming a set cement with the holes and/or cracks under preset conditions; the annular sealing cylinder is integrally formed;
and taking the annular sealing cylinder and the cement stone with holes and/or cracks in the annular sealing cylinder as the stratum crack simulation block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811091721.2A CN110927034A (en) | 2018-09-19 | 2018-09-19 | Device and method for evaluating performance of plugging material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811091721.2A CN110927034A (en) | 2018-09-19 | 2018-09-19 | Device and method for evaluating performance of plugging material |
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| CN110927034A true CN110927034A (en) | 2020-03-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561281A (en) * | 2020-05-08 | 2020-08-21 | 中国海洋石油集团有限公司 | Drilling fluid leak protection leaking stoppage effect evaluation experiment system |
| CN113777029A (en) * | 2021-11-12 | 2021-12-10 | 成都理工大学 | Device and method for measuring adhesion strength between bridging lost circulation material and rock wall surface |
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| CN111561281A (en) * | 2020-05-08 | 2020-08-21 | 中国海洋石油集团有限公司 | Drilling fluid leak protection leaking stoppage effect evaluation experiment system |
| CN111561281B (en) * | 2020-05-08 | 2022-04-29 | 中国海洋石油集团有限公司 | Drilling fluid leak protection leaking stoppage effect evaluation experiment system |
| CN113777029A (en) * | 2021-11-12 | 2021-12-10 | 成都理工大学 | Device and method for measuring adhesion strength between bridging lost circulation material and rock wall surface |
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