CN110373167A - One finishes well formation testing well killing fluid and preparation method thereof - Google Patents
One finishes well formation testing well killing fluid and preparation method thereof Download PDFInfo
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- CN110373167A CN110373167A CN201910721169.9A CN201910721169A CN110373167A CN 110373167 A CN110373167 A CN 110373167A CN 201910721169 A CN201910721169 A CN 201910721169A CN 110373167 A CN110373167 A CN 110373167A
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- well
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- formation testing
- killing fluid
- well killing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
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Abstract
The invention discloses one to finish well formation testing well killing fluid, based on former complete well formation testing well killing fluid, by percentage to the quality, the following component matched: A, sulfonated-pheno-formoldehyde resin: 5-6% is added；B, drilling fluid fluid loss agent resistant to high temperatures: 2.0-3.5%；C, high adhesive aggregation anionic cellulose: 0.2-0.3%；D, heavy weight additive: barite；The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 1.85g/cm3‑2.15g/cm3.Using the present invention, it is avoided that precipitating influences natural completion oil test operation to well killing fluid quiescence in high temperature for a long time, so that well killing fluid performance indicator is reached: high-temperature resistance >=150 DEG C are not precipitated, difference of densities≤0.03g/cm for static 5-7 days3Technical requirements.
Description
Technical field
The present invention relates to petroleum gas well completing test field of engineering technology, and it is quiet to specifically relate to a kind of long-time high temperature
It sets without high density complete well formation testing well killing fluid and preparation method thereof of the precipitating without thickening.
Background technique
In complete well oil test operation, generally by Reservoir Section drilling fluid directly as complete well formation testing well killing fluid.Well killing fluid is for a long time
Quiescence in high temperature occur precipitating or be seriously thickened may result in packer can not unseal, perforating gun blocked portion or what can not be detonated show
As such accident severe jamming, which normally produces, even induces blowout out of control accident.2014 in 230 well 4400- of Turkmenistan
It is built the pressure when playing ball after 4470m well section perforation, pressure drop is still unobvious after repeatedly building the pressure, and pressure is just slow after observing the long period
Rise and restores normal.The immediate cause for causing this phenomenon is exactly well killing fluid under the effect of shaft bottom high temperature and pressure (156 DEG C), static
Time longer 5 days rear stabilities, which are deteriorated, to be occurred precipitating or thickens to plug partial completion section.Drawing is called together in Turkmenistan within 2015
Mai Ergen is constructed in Jor-21 well second layer XVa1- XVhp test, and perforating gun does not detonate when caber perforating job, plays perforation hole
Find that perforation stick is in pressure transmission screen casing upper position after gun barrel column, screen casing middle and lower part 2/3 is by barite Severe blockage.Distance at this time
The last time circulation well killing fluid is only 75h to the sedimentation time occurs.
Publication No. CN108485619A, publication date are that the Chinese patent literature on the 4th of September in 2018 discloses a kind of do
Hot rock drilling high temperature resistant drilling fluids and preparation method thereof, contain High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent or increasing resistant to high temperatures in the drilling fluid
Viscous fluid loss agent.Meanwhile to be also added into sulfonated-pheno-formoldehyde resin, polyanion cellulose, sulfonation brown for the inventive embodiments part
Coal resin, sulfonated gilsonite, polyacrylonitrile ammonium salt, soda ash, bentonite etc..Hot dry rock described in the invention creeps into drilling well resistant to high temperatures
Liquid, heatproof have good rheological characteristic and lower filter loss, thermal stability good up to 200 DEG C under high-temperature and high-pressure conditions
Well, large rock-carrying ability is strong, can play good plugging effect using the leakage-stop liquid that the drilling fluid is prepared and have good compatibility
Property, hot dry rock well wellbore construction requirement is met, is crept into especially suitable for crack broken formation, plugging effect is good.
It can be seen that using above patent document as the prior art of representative, although also joined sulphur sylvan in drilling fluid
Urea formaldehyde, polyanion cellulose and High-temperature-resviscosity-reduction viscosity-reduction fluid loss agent etc., but these components and remaining component act synergistically, mainly
It is to play resistance to mild leak stopping.And it to solve in the application, well killing fluid generated drilling well under the effect of shaft bottom high temperature and pressure
Liquid stands rear stability variation for a long time and precipitates, thus the technical issues of blocking perforated interval, which is representative
The prior art is simultaneously not suitable for.
How to be transformed on the basis of existing well killing fluid, improves the stabilizing power resistant to high temperatures under static conditions, prevent out
The undergrounds such as existing barite precipitating or serious thickening cause downhole packer that can not unseal, screen casing blocking perforating gun can not detonate are multiple
It is miscellaneous, it has been the technical issues of well oil test operation well killing fluid must solve.
Summary of the invention
The present invention is directed to provide one and finish well formation testing well killing fluid for defect and deficiency present in the above-mentioned prior art,
Using the present invention, it is avoided that precipitating influences natural completion oil test operation to well killing fluid quiescence in high temperature for a long time, refers to well killing fluid performance
Mark can reach: high-temperature resistance >=150 DEG C are not precipitated, difference of densities≤0.03g/cm for static 5-7 days3Technology want
It asks.
Meanwhile the present invention also provides the preparation methods of complete well formation testing well killing fluid.
The present invention is realized by using following technical proposals:
One finishes well formation testing well killing fluid, it is characterised in that: based on former complete well formation testing well killing fluid, by percentage to the quality, adds
Enter the component of following proportion:
A, sulfonated-pheno-formoldehyde resin: 5-6%；
B, drilling fluid fluid loss agent resistant to high temperatures: 2.0-3.5%；
C, high adhesive aggregation anionic cellulose: 0.2-0.3%；
D, heavy weight additive: barite；
The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 1.85g/cm3-2.15g/cm3。
More preferably, the following component matched: A, sulfonated-pheno-formoldehyde resin: 5% is added；B, drilling fluid fluid loss agent resistant to high temperatures:
3%；C, high adhesive aggregation anionic cellulose: 0.3%.
One finishes the preparation method of well formation testing well killing fluid, it is characterised in that: in the complete well of original for meeting drilling and well completion operation
In formation testing well killing fluid preparing tank, by percentage to the quality, the drilling fluid of sulfonated-pheno-formoldehyde resin, 2.0-3.5% that 5-6% is added is anti-
The high adhesive aggregation anionic cellulose of high temperature fluid loss agent and 0.2-0.3%；After stirring, institute is weighed out to using barite
Need density.
The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 1.85g/cm3-2.15g/cm3。
More preferably, the following component matched: A, sulfonated-pheno-formoldehyde resin: 5% is added；B, drilling fluid fluid loss agent resistant to high temperatures:
3%；C, high adhesive aggregation anionic cellulose: 0.3%.
Compared with prior art, the beneficial effects obtained by the present invention are as follows it is as follows:
1, Reservoir Section drilling fluid (former complete well formation testing well killing fluid) is transformed using conventional drilling liquid inorganic agent, according to the present invention
Ratio addition sulfonated-pheno-formoldehyde resin, drop dehydration inorganic agent resistant to high temperatures and the high adhesive aggregation anionic cellulose, is configured to height
Temperature stands the economic and reliable method of stable complete well formation testing well killing fluid.It is verified into embodiment part Experiment, performance is fully met
Complete well formation testing is to well killing fluid " difference of densities≤0.03g/cm after 150 DEG C of * 120h of quiescence in high temperature3, performance is stable, no precipitating "
Performance assessment criteria requirement reaches packing caused by preventing high density well control fluids long-time quiescence in high temperature barite from precipitating or being seriously thickened
Device can not unseal, perforating gun blocked portion or the phenomenon that can not detonate, and reduce the purpose of well formation testing down-hole accident.
2, the sulfonated-pheno-formoldehyde resin and fluid loss agent resistant to high temperatures synergistic effect that the present invention selects, improve completion fluid high temperature
Stability；Simultaneously using polyanion cellulose improve high density completion fluid high temperature shield colloidality can come to former well killing fluid implementation change
It makes.
3, what the present invention selected is the agent of drilling fluid conventional treatment and Reservoir Section drilling fluid (former completion fluid) inorganic agent compatibility
Property it is good, execute-in-place is simple and easy, by field device condition etc. limit, to has guaranteed well formation testing well killing fluid quiescence in high temperature without sink
It forms sediment obvious without densification.
Specific embodiment
Embodiment 1
One finishes well formation testing well killing fluid, based on former complete well formation testing well killing fluid, by percentage to the quality, following proportion is added
Component:
A, sulfonated-pheno-formoldehyde resin: 5%；
B, drilling fluid fluid loss agent resistant to high temperatures: 2.0%；
C, high adhesive aggregation anionic cellulose: 0.2%；
D, heavy weight additive: barite；
The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 1.85g/cm3。
Embodiment 2
One finishes well formation testing well killing fluid, based on former complete well formation testing well killing fluid, by percentage to the quality, following proportion is added
Component:
A, sulfonated-pheno-formoldehyde resin: 6%；
B, drilling fluid fluid loss agent resistant to high temperatures: 3.5%；
C, high adhesive aggregation anionic cellulose: 0.3%；
D, heavy weight additive: barite；
The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 2.15g/cm3。
Embodiment 3
More preferably, the following component matched: A, sulfonated-pheno-formoldehyde resin: 5% is added；B, drilling fluid fluid loss agent resistant to high temperatures: 3%；
C, high adhesive aggregation anionic cellulose: 0.3%.
Embodiment 4- specific application example
Below to technical characteristic of the invention, purpose and beneficial effect, it is described in detail by live specific application example, it is real
Example does not limit the scope of the present invention.
The complete well formation testing block bottom hole temperature (BHT) in Turkmenistan is often greater than 150 DEG C, and strata pressure is higher, well killing fluid density
1.85-2.15g/cm3It is commonplace.By Reservoir Section drilling fluid directly as complete well formation testing well killing fluid after, long-time quiescence in high temperature
The barite of appearance precipitates or thickening has seriously affected natural completion oil test operation or even influenced well control safety.The present invention is for a long time
Quiescence in high temperature without precipitating the complete well formation testing well killing fluid of high density without thickening, for Turkmenistan using Reservoir Section drilling fluid as
Long-time quiescence in high temperature barite precipitating or packer caused by being thickened can not be unsealed, perforating gun blocked portion or can not be risen when completion fluid
Reservoir Section drilling fluid (former completion fluid) is transformed using conventional drilling liquid inorganic agent, is configured to quiescence in high temperature by phenomena such as quick-fried
Stable complete well formation testing well killing fluid, performance fully met well formation testing to well killing fluid " after 150 DEG C of * 120h of quiescence in high temperature up and down
Density contrast≤0.03g/cm3, performance stablize, no precipitating " performance assessment criteria requirement, Turkmenistan scene multiple wells acquirement
Successful application has achieved the purpose that the complete well formation testing down-hole accident of reduction.
1, quiescence in high temperature aging basic performance: this test is bored according to the 783.1-2014 industrial gas oil of GB/16
Well liquid on-the-spot test first part: water-base drilling fluid test method is tested, the difference is that 150 DEG C of rollings of high temperature are changed
To stand 120h, the results are shown in Table 1:
Although shear force increases after former completion fluid aging as seen from Table 1, precipitated obviously, up and down after being stood for a long time in ageing can
Density contrast is 0.20g/cm3；It ingresses to become smaller but stand for a long time after+3% JNJS-220 of magma+5%SMP-2 and still has precipitating；It is former
+ 3% JNJS-220+0.3%AP-220(high-temperature resistant polymer fluid loss agent for drilling fluid of+5% SMP-2 is starched, standard Q/ is executed
9151011466303827X8.30- 2016) it is serious to increase obvious but thickening for shear force；+ 3% JN JS of magma+5%SMP-2-
Shear force increases but is not thickened after 220+0.3% PAC-H V, and dehydration slightly reduces, difference of densities 0.03g/cm3Barite
Without precipitating.
In this example, sulfonated-pheno-formoldehyde resin code name SMP-2 type is the prior art.Drilling fluid fluid loss agent code name resistant to high temperatures
JNJS-220, referring to " a kind of drilling fluid of CN201610786649- fluid loss agent resistant to high temperatures and preparation method thereof-is applied open "
The description of technical effect part in patent document is also the prior art.High adhesive aggregation anionic cellulose code name PAC-HV is existing
Technology.AP-220 is fluid loss additive for boring fluid aminated copolymer, executes standard Q/KOZ 037-2017.
Experimental result is transformed in 1 well killing fluid of table
2, live using effect evaluation
Long-time quiescence in high temperature of the present invention is without high density complete well formation testing well killing fluid of the precipitating without thickening in Turkmenistan Hojg-24
Well and the complete well formation testing of Dov-21 well, Drt-21 well are succeeded application, good stability resistant to high temperatures are shown, with the present invention
It is compared using preceding Tu230Jing with Jor-21 well, the high-temperature stabilities problem such as quiescence in high temperature barite precipitating and serious thickening causes
Borehole problems satisfactorily resolved.
2 present invention of table applies rear completion fluid high-temperature stability the performance test results (150 DEG C of * 120h)
Claims (5)
1. finishing well formation testing well killing fluid, it is characterised in that: based on former complete well formation testing well killing fluid, by percentage to the quality,
The following component matched is added:
A, sulfonated-pheno-formoldehyde resin: 5-6%；
B, drilling fluid fluid loss agent resistant to high temperatures: 2.0-3.5%；
C, high adhesive aggregation anionic cellulose: 0.2-0.3%；
D, heavy weight additive: barite；
The density range of the complete well formation testing well killing fluid of original after heavy weight additive aggravates is 1.85g/cm3-2.15g/cm3。
2. according to claim 1 one finishes well formation testing well killing fluid, it is characterised in that: the following component matched is added: A,
Sulfonated-pheno-formoldehyde resin: 5%；B, drilling fluid fluid loss agent resistant to high temperatures: 3%；C, high adhesive aggregation anionic cellulose: 0.3%.
3. finishing the preparation method of well formation testing well killing fluid, it is characterised in that: in the complete well examination of original for meeting drilling and well completion operation
In oil pressure well liquid preparing tank, by percentage to the quality, the anti-height of the drilling fluid of sulfonated-pheno-formoldehyde resin, 2.0-3.5% that 5-6% is added
The high adhesive aggregation anionic cellulose of temperature drop dehydration agent and 0.2-0.3%；After stirring, needed for being weighed out to using barite
Density.
4. according to claim 3 one finishes the preparation method of well formation testing well killing fluid, it is characterised in that: aggravated through heavy weight additive
The density range of the complete well formation testing well killing fluid of original afterwards is 1.85g/cm3-2.15g/cm3。
5. according to claim 3 one finishes the preparation method of well formation testing well killing fluid, it is characterised in that: following proportion is added
Component: A, sulfonated-pheno-formoldehyde resin: 5%；B, drilling fluid fluid loss agent resistant to high temperatures: 3%；C, high adhesive aggregation anionic cellulose:
0.3%。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144331A (en) * | 2021-11-22 | 2023-05-23 | 中国石油天然气集团有限公司 | Oil testing completion fluid and preparation method and application thereof |
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| CN101555404A (en) * | 2009-05-20 | 2009-10-14 | 大庆开发区东油新技术有限公司 | Environment-friendly low-damage solidfree well control fluid and applications thereof |
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Application publication date: 20191025 |