CN107884257A - For the artificial core preparation method tested containing controllable crack rock crush properties - Google Patents
For the artificial core preparation method tested containing controllable crack rock crush properties Download PDFInfo
- Publication number
- CN107884257A CN107884257A CN201711177127.0A CN201711177127A CN107884257A CN 107884257 A CN107884257 A CN 107884257A CN 201711177127 A CN201711177127 A CN 201711177127A CN 107884257 A CN107884257 A CN 107884257A
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- Prior art keywords
- cement slurry
- mix cement
- mould
- rock sample
- polymer sheets
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Abstract
The present invention relates to the artificial core preparation method for being tested containing controllable crack rock crush properties, this artificial core preparation method for being used for the test containing controllable crack rock crush properties:Prepare mix cement slurry；Mold polishing is smooth, butter is coated, by steel pipe from the centre bore insertion mould of base, model is exposed in steel pipe bottom；Mix cement slurry is poured slowly into mould, after a certain amount of, surface is floating, and some polymer sheets are arranged on mix cement slurry surface, after polymer sheets and mix cement slurry are stable, continue to pour into mix cement slurry, continue to arrange polymer sheets, so circulation, until mould fills mix cement slurry；Mix cement slurry consolidates the rock sample to be formed polishing shaping, maintenance, high-temperature process, is decomposed into gas to polymer sheets are heated, the hole of generation is then genuine crack, obtains the artificial core for being tested containing controllable crack rock crush properties.The rock sample that the present invention is formed can really reflect the essential characteristic in crack.
Description
Technical field
The present invention relates to formation rock laboratory evaluation technical field during oil-gas mining, and in particular to for containing controllable
The artificial core preparation method of crack rock crush properties test.
Background technology
Currently, hydraulic fracturing is well production increment, an important technique measure of water injection well volume increase, is not only widely used in low
Gas reservoir is permeated, and good effect is also achieved in the storey increase design of middle and high permeability gas reservoir.It is special to simulate reservoir hydrfracturing
The research of property turns into a focus.
Lab simulation reservoir hydrfracturing characteristic, preferably select the natural rock sample containing intrinsic fracture.However, Practical Project
In be difficult to get the natural rock sample containing intrinsic fracture by drilling, and sample that cost is high, and degree-of-difficulty factor is big.Therefore, carry out indoors
In hydraulic fracturing experiments, artificial core has obtained important application.Compared to natural core, artificial core preparation process is simple, can
According to experiment demand, to produce the artificial rock containing controllable crack（Sandstone, coal petrography, shale）Physical model.
Currently, the method for manual manufacture rock sample containing intrinsic fracture mainly has two kinds, first, by complete rock sample cutter
Tool, is cut and is merotomized, then is adhered to together with cloud stone glue, simulates intrinsic fracture, or in filler mistake
Cheng Zhong, tagger is put in rock sample, before treating that rock sample is not fully consolidated, tagger extracted out from rock sample, simulate intrinsic fracture.
Both approaches have the shortcomings that respective, and for the first, operating process is complicated, and the intrinsic fracture formed is all insertion,
It can not form controllable crack, and second, the intrinsic fracture of formation is substantially half insertion, can not form controllable crack, and
After missing the rock sample not fully consolidated time, tagger can will not take, and cause whole rock sample completely discarded.For how to prepare one
Rock sample of the kind containing controllable crack, is urgent problem.
The content of the invention
It is an object of the present invention to provide the artificial core preparation side for being tested containing controllable crack rock crush properties
Method, this artificial core preparation method for being used for the test containing controllable crack rock crush properties are used to solve be interior at present
Experiment provides the rock sample containing controllable crack, carries out the test problem of rock fracture performance in reservoir.
The technical solution adopted for the present invention to solve the technical problems is：It is this to be used to contain controllable crack rock crush properties
The artificial core preparation method of test：
First, according to model needs, quartz sand, cement, water is uniformly mixed in proportion, obtain mix cement slurry；
2nd, the inner surface of mould is all polished smooth, and is uniformly coated with butter, mould is steel cell body formula mould；By steel pipe
From the centre bore insertion mould of base, and fixed with cloud stone glue, steel pipe top is stretched in the middle part of model, and steel pipe bottom exposes
Model 13-17mm；
3rd, mix cement slurry is slowly poured into mould, after a certain amount of mix cement slurry pours into mould, its surface smeared
It is flat, and some polymer sheets are arranged on mix cement slurry surface, after polymer sheets and mix cement slurry are stable, in cloth
Continue to pour into mix cement slurry on the polymer sheets put, after a certain amount of, then floating mix cement slurry surface, continue to arrange
Some polymer sheets, so circulation, until mould fills mix cement slurry；
4th, mix cement slurry consolidates to form rock sample, after rock sample consolidates, carries out the rock sample demoulding, polishing shaping, is conserved；
High-temperature process is carried out to rock sample, until polymer sheets are heated to be decomposed into gas, the hole of generation is then genuine crack, is used
In the artificial core tested containing controllable crack rock crush properties.
Polymer sheets and mix cement slurry surface are in 45 in step 3 in such scheme0, polymer sheets thickness is
0.1mm, long 3cm, wide 2cm.
The rock sample demoulding, the method for polishing shaping in such scheme：After rock sample consolidates 10 hours, rock sample is taken from mould
Under, rock sample surface is polished flat, conserved at room temperature.
The method that step 4 high temperature is handled in such scheme：The rock sample that will have been conserved, it is put into high temperature muffle furnace,
10000C high-temperature process some hours.
The method that step 4 high temperature is handled in such scheme：The rock sample that will have been conserved, it is put into high temperature muffle furnace,
10000C high-temperature process 1-2 hours.
In such scheme mould be by steel plate in two blocks of outer steel plates, two pieces, base combination into steel cell body, every block of outer steel
The both sides of plate are provided with steel tank, are provided with screw and lower screw on the outside of every steel tank, steel plate passes through steel respectively in every piece
Groove is arranged between two blocks of outer steel plates, and bolt is each passed through the upper screw of two blocks of outer steel plates, lower screw fastens two blocks of outer steel plates,
Two blocks of outer steel plates, steel plate tightens together with base in two pieces；Base has centre bore.Mould used uses steel material
Material is made, and has the characteristics of deformation is small, and intensity is big, by bolt and upper and lower screw, four blocks of steel plates and base are firmly fixed
In together, and good airproof performance.
The invention has the advantages that：
（1）The preparation method of rock sample of the present invention is simple to operate, it is easy to accomplish, cost is relatively low, can form controllable crack, and formed
Crack closer to the intrinsic fracture in reservoir.
（2）The rock sample that the present invention is formed, can quantitative description crack the Cracks character such as inclination angle, spacing, density and connectedness,
The essential characteristic in crack can really be reflected, available for description fracturing process in, the intersecting spy of man-made fracture and intrinsic fracture
Sign.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the structural representation of inventive die；
Fig. 3 is the structural representation of the outer steel plate of the present invention；
Fig. 4 is the artificial core schematic diagram of the test provided in an embodiment of the present invention containing controllable crack rock crush properties.
In figure：1. outer steel plate；Steel plate in 2.；3. base；4. centre bore；5. bolt；6. steel tank；Screw on 7.；8 times spiral shells
Hole.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings：
Embodiment 1：
With reference to shown in Fig. 1, this artificial core preparation method for being used for the test containing controllable crack rock crush properties：
Prepare mix cement slurry：Before making rock sample, first mould inner surface is polished smooth, coats butter, be specially：Use first
Abrasive machine polishes smooth steel plate 2 in two blocks of outer 1, two piece of steel plates and the interior surface of base 3, with bolt by two blocks of outer steel plates 1, two
Steel plate 2 fixes with base 3 in block, while coats butter in its inner homogeneous.Using 425# cement, by cement, water and quartz
Sand presses 2:1:1 ratio is bound together, and makes the square rock sample that the length of side is 300mm, wherein, polymer sheets thickness is
0.1mm, long 3cm, wide 2cm.
When mix cement slurry makes：Cement, quartz sand and water are pressed 2:1:1 ratio is stirred in together, Xian Jiashui, then is added
Defoamer, followed by cement and quartz sand, during cement and quartz sand is added, constantly it must be stirred with agitator.
Pour into a mould rock sample：Before mix cement slurry is poured into, first steel pipe is fixed in the centre bore 4 of base 3, steel pipe top
In the middle part of mould, steel pipe end exposes the about 15mm of centre bore 4, then pours into the mix cement slurry made in mould, when
When liquid level is 100mm, polymer sheets are put into, polymer sheets number is 2, polymer sheets and mix cement slurry table
Face is in 450, after polymer sheets and mix cement slurry are stable, pour into a mould mix cement slurry again, to 200mm at place into 2
Polymer sheets, polymer sheets are in 45 with cement mortar surface0, after stable, continue to pour into a mould mix cement slurry, so circulation,
Until filling mould, rock sample is become after material consolidation.
Rock sample demoulding polishing shaping：After rock sample consolidates 10 hours, rock sample is removed from mould, rock sample surface is polished
It is flat, it is put into and is conserved at room temperature.
High-temperature process：The rock sample that will have been conserved, it is put into high temperature muffle furnace, temperature adjustment to 10000C, high-temperature process one
Individual hour.
After high-temperature process, the polymer sheets in rock sample, which are heated, is decomposed into gas, and the hole of generation is then really to split
Seam, obtains the artificial core for being tested containing controllable crack rock crush properties, has reached lab simulation reservoir hydrfracturing
Purpose.The rock sample containing controllable crack obtained in this example, as shown in fig. 4, it can be seen that, the Number of Fractures in rock sample is 4.
Poured into the application when polymer sheets number, placement form and first time floating mix cement slurry plane mixed
The amount of Heshui mud, the later each amount for pouring into mix cement slurry are determined by the situation of the rock core of actually required making.
With reference to shown in Fig. 2, Fig. 3, the mould in the present invention is combined into by steel plate 2, base 3 in two blocks of outer 1, two piece of steel plates
Steel cell body, the both sides of every block of outer steel plate 1 are provided with steel tank 6, and every outside of steel tank 6 is provided with screw 7 and lower spiral shell
Hole 8, between steel plate 2 is arranged on two blocks of outer steel plates 1 by steel tank 6 respectively in every piece, upper spiral shell of the bolt 5 through two blocks of outer steel plates 1
Hole 7 fastens two blocks of outer steel plates 1, and the lower screw 8 of bolt 5 through two blocks of outer steel plates 1 fastens two blocks of outer steel plates 1, two blocks of outer steel
Steel plate 2 tightens together with base 3 in 1, two piece of plate；Base 3 has centre bore 4.
One embodiment of the present of invention is the foregoing is only, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (6)
- A kind of 1. artificial core preparation method for being used for the test containing controllable crack rock crush properties, it is characterised in that：This use In the artificial core preparation method tested containing controllable crack rock crush properties：First, according to model needs, quartz sand, cement, water is uniformly mixed in proportion, obtain mix cement slurry；2nd, the inner surface of mould is all polished smooth, and is uniformly coated with butter, mould is steel cell body formula mould；By steel pipe From base（3）Centre bore（4）Insert in mould, and fixed with cloud stone glue, steel pipe top is stretched in the middle part of model, steel pipe bottom Expose model 13-17mm；3rd, mix cement slurry is slowly poured into mould, after a certain amount of mix cement slurry pours into mould, its surface smeared It is flat, and some polymer sheets are arranged on mix cement slurry surface, after polymer sheets and mix cement slurry are stable, in cloth Continue to pour into mix cement slurry on the polymer sheets put, after a certain amount of, then floating mix cement slurry surface, continue to arrange Some polymer sheets, so circulation, until mould fills mix cement slurry；4th, mix cement slurry consolidates to form rock sample, after rock sample consolidates, carries out the rock sample demoulding, polishing shaping, is conserved； High-temperature process is carried out to rock sample, until polymer sheets are heated to be decomposed into gas, the hole of generation is then genuine crack, is used In the artificial core tested containing controllable crack rock crush properties.
- 2. the artificial core preparation method according to claim 1 for being used for the test containing controllable crack rock crush properties, its It is characterised by：Described rock sample is stripped, the method for polishing shaping：After rock sample consolidates 10 hours, rock sample is removed from mould, will Rock sample surface is polished flat, and is conserved at room temperature.
- 3. the artificial core preparation method according to claim 2 for being used for the test containing controllable crack rock crush properties, its It is characterised by：The method of described step four high temperature processing：The rock sample that will have been conserved, it is put into high temperature muffle furnace, 10000C High-temperature process some hours.
- 4. the artificial core preparation method according to claim 2 for being used for the test containing controllable crack rock crush properties, its It is characterised by：The method of described step four high temperature processing：The rock sample that will have been conserved, it is put into high temperature muffle furnace, 10000C High-temperature process 1-2 hours.
- 5. the artificial core preparation method for being used for the test containing controllable crack rock crush properties according to claim 3 or 4, It is characterized in that：Described mould is by two blocks of outer steel plates（1）, steel plate in two pieces（2）, base（3）The steel cell body being combined into, Every block of outer steel plate（1）Both sides be provided with steel tank（6）, every steel tank（6）Outside is provided with screw（7）With lower screw （8）, steel plate in every piece（2）Pass through steel tank respectively（6）It is arranged on two blocks of outer steel plates（1）Between, bolt is each passed through two blocks of outer steel Plate（1）Upper screw（7）, lower screw（8）By two pieces of outer steel plate fastenings, two blocks of outer steel plates（1）, steel plate in two pieces（2）And bottom Seat（3）Tighten together；Base（3）With centre bore（4）.
- 6. the artificial core preparation method according to claim 5 for being used for the test containing controllable crack rock crush properties, its It is characterised by：Polymer sheets and mix cement slurry surface are in 45 in described step three0, polymer sheets thickness is 0.1mm, Long 3cm, wide 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177127.0A CN107884257B (en) | 2017-11-22 | 2017-11-22 | Preparation method of artificial rock core for testing fracturing performance of rock containing controllable cracks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177127.0A CN107884257B (en) | 2017-11-22 | 2017-11-22 | Preparation method of artificial rock core for testing fracturing performance of rock containing controllable cracks |
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| CN107884257A true CN107884257A (en) | 2018-04-06 |
| CN107884257B CN107884257B (en) | 2020-07-31 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828190A (en) * | 2018-06-22 | 2018-11-16 | 中国石油大学(北京) | A kind of results of fracture simulation method of Fractured tight sand oil-gas reservoir |
| CN109187133A (en) * | 2018-09-18 | 2019-01-11 | 中国石油大学(华东) | The preparation method of preset microscopic damage artificial core |
| CN110412243A (en) * | 2019-07-09 | 2019-11-05 | 衢州学院 | One kind being used for Factors on The Thermal Cracking of Rocks experimental provision |
| CN110864944A (en) * | 2019-11-06 | 2020-03-06 | 大庆油田有限责任公司 | Preparation method of artificial rock core for simulating irregular natural cracks of cement sheath of ternary composite flooding well |
| CN112557135A (en) * | 2020-11-11 | 2021-03-26 | 核工业北京地质研究院 | Preparation and sealing method of rock sample containing cracks for multi-field coupling triaxial test |
| CN113756800A (en) * | 2021-09-30 | 2021-12-07 | 中国矿业大学(北京) | Preparation method of artificial shale containing cracks, artificial shale containing cracks and application |
| CN114136749A (en) * | 2021-12-01 | 2022-03-04 | 长江大学 | Device and method for preparing artificial rock sample containing inclined cracks |
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| CN104865110A (en) * | 2015-06-01 | 2015-08-26 | 中国矿业大学 | Method for prefabricating rough fractures in rocklike similar material specimen |
| CN105277405A (en) * | 2015-10-13 | 2016-01-27 | 中国地质大学（武汉） | Manufacture method for cement sample used for simulating parent-rock porosity character |
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| CN107328625A (en) * | 2017-07-31 | 2017-11-07 | 水利部交通运输部国家能源局南京水利科学研究院 | The method of crackle is close in a kind of simulation rock interior three-dimensional closing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828190A (en) * | 2018-06-22 | 2018-11-16 | 中国石油大学(北京) | A kind of results of fracture simulation method of Fractured tight sand oil-gas reservoir |
| CN108828190B (en) * | 2018-06-22 | 2021-03-30 | 中国石油大学(北京) | Fracture simulation method for fractured compact sandstone oil and gas reservoir |
| CN109187133A (en) * | 2018-09-18 | 2019-01-11 | 中国石油大学(华东) | The preparation method of preset microscopic damage artificial core |
| CN110412243A (en) * | 2019-07-09 | 2019-11-05 | 衢州学院 | One kind being used for Factors on The Thermal Cracking of Rocks experimental provision |
| CN110864944A (en) * | 2019-11-06 | 2020-03-06 | 大庆油田有限责任公司 | Preparation method of artificial rock core for simulating irregular natural cracks of cement sheath of ternary composite flooding well |
| CN110864944B (en) * | 2019-11-06 | 2022-07-19 | 大庆油田有限责任公司 | Preparation method of artificial rock core for irregular natural cracks of cement sheath of oil-water well |
| CN112557135A (en) * | 2020-11-11 | 2021-03-26 | 核工业北京地质研究院 | Preparation and sealing method of rock sample containing cracks for multi-field coupling triaxial test |
| CN113756800A (en) * | 2021-09-30 | 2021-12-07 | 中国矿业大学(北京) | Preparation method of artificial shale containing cracks, artificial shale containing cracks and application |
| CN114136749A (en) * | 2021-12-01 | 2022-03-04 | 长江大学 | Device and method for preparing artificial rock sample containing inclined cracks |
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