CN107024408A - A kind of wellbore stability evaluation method - Google Patents
A kind of wellbore stability evaluation method Download PDFInfo
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- CN107024408A CN107024408A CN201710312891.8A CN201710312891A CN107024408A CN 107024408 A CN107024408 A CN 107024408A CN 201710312891 A CN201710312891 A CN 201710312891A CN 107024408 A CN107024408 A CN 107024408A
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- clay
- drilling fluid
- additive
- evaluation method
- sieve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
Abstract
The present invention relates to a kind of wellbore stability evaluation method, object to be evaluated and clay are mixed, and the mud ball of system or the clay piece of pressurization compacting are rolled into a ball with normal pressure, enters stratum micropore to simulate additive for drilling fluid or filtrate.The change of mud ball or clay piece pattern after by soaking at different conditions, draws the conclusion of the effect of drilling fluid or inorganic agent stabilizing borehole；It can be used for appraisal drilling liquid inorganic agent single dose or drilling fluid filtrate enter behind the micropore of stratum, the influence to stratum clay mineral cementing strength.
Description
Technical field
The present invention relates to a kind of wellbore stability evaluation method, belong to petroleum works technical field.
Background technology
Borehole well instability is the outstanding problem during drilling well Oil And Gas Exploration And Development, is also to be engaged in oil, natural gas money
Source exploration and development scientific research personnel's emphasis research direction.For the ease of the property of examination drilling fluid system or a certain inorganic agent stabilizing borehole
Can, develop the indoor evaluation methods such as the dispersed evaluation experimental of mud shale, hydrating capacity evaluation experimental, closure experiment.
But many performances that stabilizing borehole is studied by evaluation study object of natural core of above-mentioned evaluation method, and stratum clay
Mineral attribute and distribution of pores only have statistical significance, exist unavoidably using its experiment conclusion obtained as evaluation medium and take a part for the whole
The problem of；In addition, do not take into full account that additive for drilling fluid is entered behind the microcrack inside of stratum with filtrate, it is cementing to micropore
Strengthen the influence of performance.
The content of the invention
The present invention, there is provided a kind of wellbore stability evaluation method, is solved existing for above-mentioned problems of the prior art
The problem of with the presence of taking a part for the whole when wellbore stability performance is evaluated in technology.
The technical scheme is that：
A kind of wellbore stability evaluation method, comprises the following steps：
Clay is dried into 2 ~ 4 h at 102 ~ 105 DEG C, additive for drilling fluid and clear water are added into the clay after drying, its
The mass ratio of middle clay, additive for drilling fluid and clear water is 6: 1~2: 2~3；Rolled into a ball into after stirring under normal temperature and pressure mud ball or
Clay piece is suppressed according to the method described in standard SY/T 6335-1997；
Above-mentioned mud ball or clay piece are transferred in the aging reactor for filling mobile phase, roller aging is transferred to after exhaust sealing
In stove, the volume mass ratio of wherein mobile phase and clay is, 400 ~ 450 mL：6g；
Aging reactor reclaims old after cooling in static at 80 ~ 150 DEG C or rolling h of aging 16 with the mesh sub-sieve of aperture 80 ~ 200
Change in the mud ball or clay piece in kettle, water and be transferred to after 1 ~ 3 min of rinsing in culture dish；
Culture dish takes out residue on sieve and weighed, pass through residue on sieve pattern and quality in 102 ~ 105 DEG C of h of forced air drying 2 ~ 4
Change determines that additive for drilling fluid suppresses borehole wall stability.
A kind of wellbore stability evaluation method, comprises the following steps：
According to SY/T5621-93 standard, test drilling fluid filtration and collect filtrate；
Clay is dried into 4 h in 105 ± 3 DEG C, additive for drilling fluid and filtrate are added into the clay after drying, wherein glutinous
Soil, additive for drilling fluid and the mass ratio of filtrate are 6: 1~2:2 ~ 3, the mud ball of 8 ~ 10 g/ is rolled into a ball into after stirring or is pressed
Method compacting clay piece described in the quasi- SY/6335-1997 of sighting target；
Above-mentioned mud ball or clay piece are transferred in the aging reactor for filling mobile phase, after exhaust sealing into roller ageing oven,
The volume mass ratio of wherein mobile phase and clay is, 400 ~ 450 mL：6g；
Aging reactor reclaims old after cooling in static at 80 ~ 150 DEG C or rolling h of aging 16 with the mesh sub-sieve of aperture 80 ~ 200
Change in the mud ball or clay piece in kettle, water and be transferred to after 1 ~ 3 min of rinsing in culture dish；
Culture dish takes out residue on sieve and weighed in 102 ~ 105 DEG C of h of forced air drying 2 ~ 4；Pass through residue on sieve pattern and quality
Change determines that additive for drilling fluid suppresses borehole wall stability.
Described clay is one kind or mixture in montmorillonite, illite, kaolinite.
Described additive for drilling fluid is in PAMC, bitumen, oxidized asphalt and sulfonated gilsonite
Any or mixture.
Described mobile phase is the aqueous solution of inorganic salts.
Described drilling fluid is water-base drilling fluid；
Described filtrate be room temperature in press filtration it is unfounded test or the experiment of HTHP leak-off obtain filtrate.
The beneficial effects of the invention are as follows：
The present invention mixes object to be evaluated and clay, and the mud ball of system or the clay piece of pressurization compacting are rolled into a ball with normal pressure, carrys out mould
Intend additive for drilling fluid or filtrate enters stratum micropore.The change of mud ball or clay piece pattern after by soaking at different conditions
Change, draw the conclusion of the effect of drilling fluid or inorganic agent stabilizing borehole；It can be used for appraisal drilling liquid inorganic agent single dose or drilling well
Liquid filtrate enters behind the micropore of stratum, the influence to stratum clay mineral cementing strength.
It is of the invention compared with existing evaluation method, can more reflect that additive for drilling fluid or filtrate enter stratum micropore
Afterwards, to the influence of stratum bonding capacity, underground actual conditions can more be pressed close to；This method is simple and easy to do simultaneously, suitable in reality
Test condition it is not enough under conditions of use.
Embodiment
Specific embodiment is set forth below, to illustrate the method for the invention.
Embodiment 1
3.0 g kaolinites, 3.0 g montmorillonites are dried after 2 h at 102 DEG C, with 0.5 g PAMCs, 0.5 g
Bitumen and 2.0 g deionized waters are well mixed, and roll into a ball into mud ball.Gained mud ball, which is transferred to, fills the compound salt solution of 400 mL
In aging reactor, and the static h of aging 16 at 80 DEG C in roller ageing oven.Reclaimed after aging reactor cooling with the mesh sub-sieve of aperture 80
Mud ball in aging reactor is simultaneously transferred in culture dish after rinsing 1min in clear water.Culture dish takes in 102 DEG C of h of forced air drying 4
Go out residue on sieve and weigh.Determine PAMC and bitumen to containing height by residue on sieve pattern and mass change
The stability of ridge stone, the montmorillonite borehole wall.
Embodiment 2
3.0 g illites, 3.0 g montmorillonites are dried after 4 h at 105 DEG C, with 0.5 g PAMCs, 0.5 g
Bitumen and 3.0 g deionized waters are well mixed, and roll into a ball into mud ball.Gained mud ball be transferred to fill 450 mL8% KCl it is molten
In the aging reactor of liquid, and the static h of aging 16 at 150 DEG C in roller ageing oven.With the mesh of aperture 200 point sample after aging reactor cooling
Sieve reclaims the mud ball in aging reactor and is transferred to after 3 min are rinsed in clear water in culture dish.Culture dish is dry in 105 DEG C of air blast
Dry 2 h, takes out residue on sieve and weighs.PAMC and bitumen are determined by residue on sieve pattern and mass change
To the stability containing illite, the montmorillonite borehole wall.
Embodiment 3
3.0 g kaolinites, 2.0 g illites, 2.0 g montmorillonites are dried after 2 h at 103 DEG C, with 0.5 g cations poly- third
It is transferred to after acrylamide, 0.5 g bitumens, 1.0 g oxidized asphalts and 3.0 g deionized waters are well mixed on tablet press machine, 5
Clay piece is made after the min of MPa precompressed 3, the min of 15 MPa voltage stabilizings 1.Gained clay piece, which is transferred to, fills 420 mL saturated brines
In aging reactor, and aging 16 h is rolled in roller ageing oven at 120 DEG C.Returned after aging reactor cooling with the mesh sub-sieve of aperture 120
Receive the mud ball in aging reactor and be transferred to after 2 min are rinsed in clear water in culture dish.Culture dish is in 103 DEG C of forced air dryings 3
H, takes out residue on sieve and weighs.PAMC, bitumen, oxidation are determined by residue on sieve pattern and mass change
The mixture of pitch to containing kaolinite, illite, the montmorillonite borehole wall stability.
Embodiment 4
3.0 g kaolinites, 2.0 g illites, 2.0 g montmorillonites are dried after 2 h at 103 DEG C, with 0.5 g cations poly- third
Acrylamide, 0.5 g bitumens, 1.0 g oxidized asphalts and 3.0 g deionized waters are according to collected by SY/T5621-93 standard
Into saturated salt-water drilling fluid room temperature, filter pressing loss filtrate is well mixed and is transferred on tablet press machine, the min of 5 MPa precompressed 3,15
Clay piece is made after the min of MPa voltage stabilizings 1.Gained clay piece is transferred in the aging reactor for filling 420 mL saturated brines, and in rolling
The h of aging 16 is rolled in sub- ageing oven at 120 DEG C.With the mud in the mesh sub-sieve of aperture 120 recovery aging reactor after aging reactor cooling
Ball is simultaneously transferred in culture dish after 2 min are rinsed in clear water.Culture dish takes out residue on sieve simultaneously in 103 DEG C of h of forced air drying 3
Weigh.The mixture pair of PAMC, bitumen, oxidized asphalt is determined by residue on sieve pattern and mass change
Containing kaolinite, illite, the montmorillonite borehole wall stability.
Embodiment 5
3.0 g illites, 3.0 g montmorillonites are dried after 2 h at 102 DEG C, with 0.5 g PAMCs, 0.5 g
Bitumen and 2.0 g are according to filter pressing loss filtrate in saturated salt-water drilling fluid room temperature collected by SY/T5621-93 standard
Mixing, and roll into a ball into mud ball.Gained mud ball is transferred in the aging reactor for filling 420 mL saturated brines, and in roller ageing oven
The static h of aging 16 at 120 DEG C.With the mud ball in the mesh sub-sieve of aperture 120 recovery aging reactor and in clear water after aging reactor cooling
It is transferred to after 2 min of middle rinsing in culture dish.Culture dish takes out residue on sieve and weighed in 102 DEG C of h of forced air drying 3.Pass through sieve
Excess pattern and mass change determine PAMC, bitumen, oxidized asphalt mixture to containing illite,
The stability of the montmorillonite borehole wall.
Above with respect to the specific descriptions of building-up process of the present invention, it is merely to illustrate the present invention and is not limited to of the invention real
Apply the technical scheme described by example.It will be understood by those within the art that, still the present invention can be modified or
Equivalent substitution, to reach identical technique effect.As long as satisfaction uses needs, all within the scope of the present invention.
Claims (7)
1. a kind of wellbore stability evaluation method, it is characterised in that comprise the following steps：
Clay is dried into 2 ~ 4 h at 102 ~ 105 DEG C, additive for drilling fluid and clear water are added into the clay after drying, wherein
The mass ratio of clay, additive for drilling fluid and clear water is 6: 1~2: 2~3；Rolled into a ball into after stirring under normal temperature and pressure mud ball or by
Method compacting clay piece described in the quasi- SY/T 6335-1997 of sighting target；
Above-mentioned mud ball or clay piece are transferred in the aging reactor for filling mobile phase, roller ageing oven is transferred to after exhaust sealing
In, the volume mass ratio of wherein mobile phase and clay is, 400 ~ 450 mL：6g；
Aging reactor reclaims old after cooling in static at 80 ~ 150 DEG C or rolling h of aging 16 with the mesh sub-sieve of aperture 80 ~ 200
Change in the mud ball or clay piece in kettle, water and be transferred to after 1 ~ 3 min of rinsing in culture dish；
Culture dish takes out residue on sieve and weighed in 102 ~ 105 DEG C of h of forced air drying 2 ~ 4, is become by residue on sieve pattern and quality
Change and determine that additive for drilling fluid suppresses borehole wall stability.
2. a kind of wellbore stability evaluation method, it is characterised in that comprise the following steps：
According to SY/T5621-93 standard, test drilling fluid filtration and collect filtrate；
Clay is dried into 4 h in 105 ± 3 DEG C, additive for drilling fluid and filtrate are added into the clay after drying, wherein glutinous
Soil, additive for drilling fluid and the mass ratio of filtrate are 6: 1~2:2 ~ 3, the mud ball of 8 ~ 10 g/ is rolled into a ball into after stirring or is pressed
Method compacting clay piece described in the quasi- SY/6335-1997 of sighting target；
Above-mentioned mud ball or clay piece are transferred in the aging reactor for filling mobile phase, after exhaust sealing into roller ageing oven,
The volume mass ratio of wherein mobile phase and clay is, 400 ~ 450 mL：6g；
Aging reactor reclaims old after cooling in static at 80 ~ 150 DEG C or rolling h of aging 16 with the mesh sub-sieve of aperture 80 ~ 200
Change in the mud ball or clay piece in kettle, water and be transferred to after 1 ~ 3 min of rinsing in culture dish；
Culture dish takes out residue on sieve and weighed in 102 ~ 105 DEG C of h of forced air drying 2 ~ 4；Become by residue on sieve pattern and quality
Change and determine that additive for drilling fluid suppresses borehole wall stability.
3. a kind of wellbore stability evaluation method according to claim 1 or 2, it is characterised in that described clay is de- to cover
One kind or mixture in stone, illite, kaolinite.
4. a kind of wellbore stability evaluation method according to claim 1 or 2, it is characterised in that described additive for drilling fluid
For any of PAMC, bitumen, oxidized asphalt and sulfonated gilsonite or mixture.
5. a kind of wellbore stability evaluation method according to claim 1 or 2, it is characterised in that described mobile phase is inorganic
The aqueous solution of salt.
6. a kind of wellbore stability evaluation method according to claim 2, it is characterised in that described drilling fluid bores to be water base
Well liquid.
7. a kind of wellbore stability evaluation method according to claim 2, it is characterised in that described filtrate is pressure in room temperature
The filtrate that leak-off is tested or the experiment of HTHP leak-off is obtained.
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| CN201710312891.8A CN107024408B (en) | 2017-05-05 | 2017-05-05 | A kind of wellbore stability evaluation method |
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| CN107024408B CN107024408B (en) | 2019-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653736A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | A kind of experimental provision and method for appraisal drilling liquid caving-preventing characteristic |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161455A (en) * | 2011-12-15 | 2013-06-19 | 长江大学 | High temperature and high pressure shale well wall stability evaluation device |
| CN103485762A (en) * | 2012-06-08 | 2014-01-01 | 中国石油化工股份有限公司 | Visual simulation shale micro-crack plugging capacity test system and method |
| WO2016072994A1 (en) * | 2014-11-06 | 2016-05-12 | Halliburton Energy Services, Inc. | Methods of ranking formation stabilizer performance |
| CN105781541A (en) * | 2016-03-17 | 2016-07-20 | 成都创源油气技术开发有限公司 | Logging evaluation method for shale borehole stability |
-
2017
- 2017-05-05 CN CN201710312891.8A patent/CN107024408B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161455A (en) * | 2011-12-15 | 2013-06-19 | 长江大学 | High temperature and high pressure shale well wall stability evaluation device |
| CN103485762A (en) * | 2012-06-08 | 2014-01-01 | 中国石油化工股份有限公司 | Visual simulation shale micro-crack plugging capacity test system and method |
| WO2016072994A1 (en) * | 2014-11-06 | 2016-05-12 | Halliburton Energy Services, Inc. | Methods of ranking formation stabilizer performance |
| CN105781541A (en) * | 2016-03-17 | 2016-07-20 | 成都创源油气技术开发有限公司 | Logging evaluation method for shale borehole stability |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653736A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | A kind of experimental provision and method for appraisal drilling liquid caving-preventing characteristic |
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Effective date of registration: 20200310 Address after: 124101 Taiping Street, economic development zone, Panshan District, Panjin City, Liaoning Province Patentee after: PANJIN HUIMING INDUSTRIAL CO., LTD. Address before: Wanghua District West Dandong Road 113001 Liaoning city of Fushun province No. 1 Patentee before: Liaoning Shihua University |
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