CN105604547B - A kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body - Google Patents
A kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body Download PDFInfo
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- CN105604547B CN105604547B CN201610104552.6A CN201610104552A CN105604547B CN 105604547 B CN105604547 B CN 105604547B CN 201610104552 A CN201610104552 A CN 201610104552A CN 105604547 B CN105604547 B CN 105604547B
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- rock body
- hydraulic fracturing
- fragmented rock
- broken
- measurement method
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The present invention provides a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body, comprising: to broken or compared with setting instrument connection in fragmented rock body；To broken or compared with fragmented rock body carry out compaction grouting；Remove the slip casting solidfied material in instrument connection；Hydraulic fracturing geostress measurement equipment is installed in the instrument connection after cleaning, carries out hydraulic fracturing detecting earth stress.The present invention has many advantages, such as simple, practical, economical, can be effectively applied to hydraulic fracturing geostress measurement broken or compared with fragmented rock body, with good economic efficiency and social benefit.
Description
Technical field
The invention belongs to geostress measurement technical fields.
Background technique
Hydraulic fracturing geostress measurement technology is due to its test depth depth, and easy to operate, test period is short and is not required to
It wants rock mechanics parameters to participate in the advantages that calculating, is widely used at home and abroad, application range covers water power, mine, friendship
Rock engineerings and the earthquake mechanisms, geodynamical research such as logical, military project, but it is higher to the integrity demands of rock mass, it is related
Regulations regulation, hydraulic fracturing geostress measurement are only applicable to completely and than more complete rock mass, when encounter it is broken or compared with
When fragmented rock body test section, geostress measurement can not be just carried out.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of hydraulic fracturing crustal stress amounts suitable for fragmented rock body
Survey method can effectively solve broken or hydraulic fracturing compared with fragmented rock body and measure crustal stress problem.
The technical proposal for solving the technical problem of the invention is: a kind of hydraulic fracturing suitable for fragmented rock body
Stress method for measurement, comprising the following steps:
(1) from rockmass to broken or compared with instrument connection is set in fragmented rock body, the instrument connection is worn from rockmass
It crosses broken or compared with fragmented rock body and protrudes into rockmass；
(2) Grouting Pipe and packer are installed in the borehole, to broken or compared with fragmented rock body carry out compaction grouting；
(3) etc. after injection slurries solidification, the slip casting solidfied material in instrument connection is removed；
(4) hydraulic fracturing geostress measurement equipment is installed, to broken or compared with fragmented rock body in the instrument connection after cleaning
Carry out hydraulic fracturing detecting earth stress.
While by adopting the above technical scheme, the present invention can also be used or be combined using technology further below
Scheme:
Instrument connection protrudes into the depth in rockmass not less than 1m in the step (1).
The bore diameter of instrument connection is 76m or 108mm in the step (1).
Injection slurry in the step (2) uses cement-silicate slurries.
Grouting range in the step (2) is not less than the aperture of 3 times of instrument connections.
Intensity in the step (3) after injection slurry solidification is not less than 1MPa.
Broken or permeability rate compared with fragmented rock body after compaction grouting is not more than 1 Lv Rong.
The geostress measurement equipment includes packer and Steel Tube Special.
The beneficial effects of the present invention are: the invention proposes a kind of suitable for hydraulic fracturing broken or compared with fragmented rock body
The new process of geostress measurement efficiently solves the problems, such as that broken or hydraulic fracturing compared with fragmented rock body measures crustal stress, this hair
It is bright using cement-silicate slurries to broken or compared with fragmented rock body carry out compaction grouting, it is desirable that range of grouting is not less than 3 times of brill
Bore dia, grout curing rear intensity are not less than 1MPa, and the broken or permeability rate compared with fragmented rock body after compaction grouting is not more than 1 Lyu
Honor, during hydraulic fracturing geostress survey, it is ensured that pressure energy circulation applies, to obtain the instantaneous closing after rock mass fracturing
The parameters such as pressure and reopening pressure calculate the original crustal stress of test position.The present invention have many advantages, such as it is simple, practical, economical,
It can be effectively applied to hydraulic fracturing geostress measurement broken or compared with fragmented rock body, with good economic efficiency and social effect
Benefit.
Detailed description of the invention
Fig. 1 is the drilling schematic diagram of step 1 of the present invention.
Fig. 2 is the grouting schematic diagram of step 2 of the present invention.
Fig. 3 is the cleaning bottom of hole schematic diagram of step 4 of the present invention.
Fig. 4 is hydrofracturing schematic diagram of the invention.
Figure label: 1- rockmass, 2- are broken or compared with fragmented rock body, 3- instrument connection, 4- Grouting Pipe, 5- isolator, 6-
Slip casting solidfied material, 7- Steel Tube Special.
Specific embodiment
Referring to attached drawing.
Of the invention is a kind of suitable for hydraulic fracturing geostress measurement method broken or compared with fragmented rock body, specific implementation
Steps are as follows:
Step 1: (drilling) instrument connection 3 is set with geological drilling rig in rockmass 1, instrument connection 3 is worn from rockmass 1
It crosses, passes through and be crushed or compared with fragmented rock body 2, enter back into rockmass 1, be again introduced into the depth of rockmass 1 not less than 1m, survey
The diameter D of prospect hole 3 is 76mm or 108mm.
Step 2: installing Grouting Pipe and packer in the borehole, to broken or compared with fragmented rock body carry out compaction grouting.Slip casting
Liquid uses cement-silicate slurries, and ratio, grouting pressure and grouting time of cement-silicate etc. are according to the test at scene come really
It is fixed, but the diameter D for instrument connection 3 of the range not less than 3 times that ensure to be in the milk, it is grout curing after intensity be not less than 1MPa.
A period of time is stood after slip casting, and the slip casting solidfied material 6 of some strength, slip casting solidfied material are formed after waiting injection slurries to solidify
6 intensity is not less than 1MPa.
Step 3: waiting injection slurries to solidify to be formed after slip casting solidfied material 6, drills (i.e. instrument connection 3) to original with geological drilling rig
Cleaning bottom of hole is carried out, the slip casting solidfied material in instrument connection 3 is cleared away.
Step 4: the hydraulic fracturings crustal stress amount such as packer 5 and Steel Tube Special 7 is installed in the instrument connection 3 after cleaning
Measurement equipment, to being crushed or carrying out hydraulic fracturing detecting earth stress compared with fragmented rock body, to obtain the instantaneous closing after rock mass fracturing
The parameters such as pressure and reopening pressure calculate the original crustal stress of test position.
Claims (8)
1. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body, it is characterised in that: the following steps are included:
(1) from rockmass to broken or compared with instrument connection is set in fragmented rock body, the instrument connection passes through broken from rockmass
It is broken or compared with fragmented rock body and protrude into rockmass；
(2) Grouting Pipe and packer are installed in the borehole, to broken or compared with fragmented rock body carry out compaction grouting；
(3) etc. after injection slurries solidification, the slip casting solidfied material in instrument connection is removed；
(4) hydraulic fracturing geostress measurement equipment is installed, to broken or carry out compared with fragmented rock body in the instrument connection after cleaning
Hydraulic fracturing detecting earth stress.
2. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: instrument connection protrudes into the depth in rockmass not less than 1m in the step (1).
3. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the bore diameter of instrument connection is 76mm or 108mm in the step (1).
4. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the injection slurry in the step (2) uses cement-silicate slurries.
5. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the grouting range in the step (2) is not less than the aperture of 3 times of instrument connections.
6. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the intensity in the step (3) after injection slurry solidification is not less than 1MPa.
7. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the broken or permeability rate compared with fragmented rock body after compaction grouting is not more than 1 Lv Rong.
8. a kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body as described in claim 1, feature exist
In: the geostress measurement equipment includes packer and Steel Tube Special.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104552.6A CN105604547B (en) | 2016-02-25 | 2016-02-25 | A kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104552.6A CN105604547B (en) | 2016-02-25 | 2016-02-25 | A kind of hydraulic fracturing geostress measurement method suitable for fragmented rock body |
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| Publication Number | Publication Date |
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| CN105604547A CN105604547A (en) | 2016-05-25 |
| CN105604547B true CN105604547B (en) | 2019-03-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445193B (en) * | 2018-06-04 | 2020-01-07 | 东北大学 | Grouting test system for prefabricated crack-containing rock mass under excavation stress and use method |
| CN109029796B (en) * | 2018-09-13 | 2023-11-03 | 北京科技大学 | Protector of hydraulic fracturing ground stress testing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745240A (en) * | 1994-05-11 | 1998-04-28 | Essilor International Compagnie Generale D'optique | Method and device for in situ stress measurement within a thin film upon its deposition on a substrate |
| CN102031954A (en) * | 2010-12-30 | 2011-04-27 | 河南理工大学 | Coal and rock bore hydraulic fracture experimental apparatus |
| CN103850678A (en) * | 2012-12-04 | 2014-06-11 | 冯刚 | Hydraulic fracturing ground stress testing system for panoramic drill hole inspection instrument |
| CN104749036A (en) * | 2015-04-01 | 2015-07-01 | 中国电建集团华东勘测设计研究院有限公司 | In-situ rock-mass mechanic test system and in-situ rock-mass mechanic test method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ701640A (en) * | 2012-04-06 | 2016-09-30 | Geomatters Llc | Mobile test system and methods for in situ characterization of stress and deflection dependent stiffness and bearing capacity of soils and geo-materials |
-
2016
- 2016-02-25 CN CN201610104552.6A patent/CN105604547B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745240A (en) * | 1994-05-11 | 1998-04-28 | Essilor International Compagnie Generale D'optique | Method and device for in situ stress measurement within a thin film upon its deposition on a substrate |
| CN102031954A (en) * | 2010-12-30 | 2011-04-27 | 河南理工大学 | Coal and rock bore hydraulic fracture experimental apparatus |
| CN103850678A (en) * | 2012-12-04 | 2014-06-11 | 冯刚 | Hydraulic fracturing ground stress testing system for panoramic drill hole inspection instrument |
| CN104749036A (en) * | 2015-04-01 | 2015-07-01 | 中国电建集团华东勘测设计研究院有限公司 | In-situ rock-mass mechanic test system and in-situ rock-mass mechanic test method |
Non-Patent Citations (1)
| Title |
|---|
| 水压致裂法三维地应力测量;刘允芳;《岩石力学与工程学报》;19911001;第10卷(第03期);第246-256页 |
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