CN109652034A - A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous - Google Patents
A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous Download PDFInfo
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- CN109652034A CN109652034A CN201811552390.8A CN201811552390A CN109652034A CN 109652034 A CN109652034 A CN 109652034A CN 201811552390 A CN201811552390 A CN 201811552390A CN 109652034 A CN109652034 A CN 109652034A
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- Prior art keywords
- drilling fluid
- water
- base drilling
- conditions
- high temperature
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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
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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
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a kind of methods of water-base drilling fluid pH value under the conditions of maintenance high temperature and high saliferous, it is on the basis of existing water-based drilling formula of liquid, in terms of water-base drilling fluid prescription quality percentage, increase by 0.3%~1.0% pH stabilizer and 0.3%~0.5% oxygen scavenger, it is added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilizer and oxygen scavenger；During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.This method can alleviate the fall of water-base drilling fluid pH value under the conditions of high temperature, high saliferous, its pH value is set to keep relative stability, prevent drilling fluid from causing underground caused by inorganic agent failure, drill tool corrosion etc. complicated because of pH value decline, the effect for the case where safeguarding drilling liquid pH value, playing cost efficiency under the conditions of high temperature, high saliferous by a large amount of supplement caustic soda is decreased simultaneously.
Description
Technical field
The present invention relates to oil and gas well drilling industry, specifically relates to a kind of maintenance high temperature and high saliferous condition is lauched
The method of base drilling fluid pH value.
Background technique
Drilling fluid in use, since temperature raises, reasons, the pH value such as salt contamination can reduce, not only in certain journey
The effect of inorganic agent in drilling fluid is influenced on degree, is reduced the working performance of drilling fluid, can also be aggravated the corrosion of drilling tool, causes to bore
Well accident increases drilling cost.Drilling fluid pH value under conditions of high temperature, high saliferous can all reduce, and prolonging with the time
Long, pH value can constantly decline；More high ph-values decline is faster, salt content more high ph-values fall is bigger for temperature.
Current solution is that a large amount of caustic soda are supplemented into drilling fluid, adjusts drilling fluid again after maintaining the pH value of drilling fluid
Performance.Such as Publication No. 108276975A, publication date is that the Chinese patent literature on July 13rd, 2018 discloses kind of a water resistant to high temperatures
Base drilling fluid and preparation method thereof, the drilling fluid include 100 parts of water；1~2 part of sodium bentonite；PH adjusting agent 1.0~
1.6 part；2~4 parts of high-temperature stabilizer；Modified 2~4 parts of humic acid fluid loss additive；2~3 parts of sulfonation class diluent resistant to high temperatures；High temperature
0.8~1.2 part of flow pattern regulator；12~18 parts of inorganic salts and heavy weight additive, the dosage of heavy weight additive so that water-base drilling fluid it is close
Degree is in 2.0~2.4g/cm3In range, high-temperature stabilizer is the micro-nano ball that partial size is 0.1~1 μm；Modified humic acid filtrate reducing
Agent is obtained by humic acid through amidation modification.Embodiment shows the high-temperature resistant water-based drilling fluid of invention offer in 220 DEG C of height
Temperature, 2.2g/ cm3Still with the rheological behavior of " low viscous height is cut " under high density, is conducive to High angle and horizontal well carries rock
Bits, and filter loss is only 12mL under high-temperature and high-pressure conditions.
But by above patent document in the way of existing a large amount of caustic soda by supplement of representative, higher cost.
Summary of the invention
The present invention is directed to provide a kind of maintenance high temperature and high saliferous for defect and deficiency present in the above-mentioned prior art
Under the conditions of water-base drilling fluid pH value method.This method can alleviate water-base drilling fluid under the conditions of high temperature, high saliferous under pH value
Range of decrease degree makes its pH value keep relative stability, caused by preventing drilling fluid from leading to inorganic agent failure, drill tool corrosion etc. because of pH value decline
Underground it is complicated, while decreasing the feelings for safeguarding drilling liquid pH value under the conditions of high temperature, high saliferous by a large amount of supplement caustic soda
Condition plays the effect of cost efficiency.
The present invention is realized by using following technical proposals:
A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous, it is characterised in that: in existing water-based drilling
On the basis of formula of liquid, in terms of water-base drilling fluid prescription quality percentage, increase by 0.3%~1.0% pH stabilizer and 0.3%~
0.5% oxygen scavenger is added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilizer and oxygen scavenger；
During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.
The pH stabilizer is methyl monoethanolamine, methyl diethanolamine or dimethylethanolamine.
The oxygen scavenger is sodium sulfite.
Compared with prior art, the beneficial effects obtained by the present invention are as follows it is as follows:
1, using described in this method on the basis of existing water-based drilling formula of liquid, increase by 0.3%~1.0% pH stabilizer and
0.3%~0.5% oxygen scavenger, and the Adding Way used.It is learnt through experiment, after being used for water-base drilling fluid, water-base drilling fluid
PH drop-out value in the case where 130 DEG C of temperature, saliferous are up to 120 000mg/L, 70%~85% can be reduced；It is reached in 150 DEG C, saliferous
In the case where 120,000mg/L, 60%~75% can be reduced, in 180 DEG C, saliferous up under conditions of 120,000mg/L, can be reduced
45%~55%.Meanwhile it is unaffected by the water-base drilling fluid other performance that this method is handled, deep-well height can be efficiently solved
The problem of using water-base drilling fluid pH value rapid decrease in the case of the high saliferous of temperature, reduces drilling complexity accident, and save drilling fluid
Materials'use amount.
2, this method can reduce water-base drilling fluid pH value fall under the conditions of high temperature high saliferous well；Reduce with
Toward under the conditions of high temperature high saliferous, pH value declines to a great extent, and leads to problems such as underground caused by inorganic agent failure, drill tool corrosion complicated
Situation；Reduce in the past under the conditions of high temperature high saliferous, needs by a large amount of supplement highly basic come the problem of safeguarding drilling liquid pH value；
Water-base drilling fluid heat and salinity tolerance ability is improved, overall performance is more stable, reduces maintenance processing frequency, has preferably economical
Property.
Specific embodiment
Embodiment 1
As a better embodiment of the invention, it discloses water-base drilling fluid pH under the conditions of a kind of maintenance high temperature and high saliferous
The method of value in terms of water-base drilling fluid prescription quality percentage, increases by 0.3% on the basis of existing water-based drilling formula of liquid
PH stabilizer and 0.3% oxygen scavenger, be added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilizer
And oxygen scavenger；During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.
The pH stabilizer is methyl monoethanolamine.The oxygen scavenger is sodium sulfite.
Embodiment 2
As another better embodiment of the invention, it discloses water-base drilling fluids under the conditions of a kind of maintenance high temperature and high saliferous
The method of pH value in terms of water-base drilling fluid prescription quality percentage, increases by 1.0% on the basis of existing water-based drilling formula of liquid
PH stabilizer and 0.5% oxygen scavenger, be added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilization
Agent and oxygen scavenger；During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.
The pH stabilizer is methyl diethanolamine.The oxygen scavenger is sodium sulfite.
Embodiment 3
As preferred forms of the invention, it discloses water-base drilling fluid pH value under the conditions of a kind of maintenance high temperature and high saliferous
Method in terms of water-base drilling fluid prescription quality percentage, increase by 0.6% pH on the basis of existing water-based drilling formula of liquid
Stabilizer and 0.4% oxygen scavenger, be added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilizer with
Oxygen scavenger；During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.
The pH stabilizer is dimethylethanolamine.The oxygen scavenger is sodium sulfite.
Claims (3)
1. a kind of method of water-base drilling fluid pH value under the conditions of maintenance high temperature and high saliferous, it is characterised in that: in existing water base brill
On the basis of well liquid formula, in terms of water-base drilling fluid prescription quality percentage, increase by 0.3%~1.0% pH stabilizer and 0.3%
~0.5% oxygen scavenger is added method particularly includes: after preparing water-base drilling fluid, sequentially add pH stabilizer and deoxygenation
Agent；During maintenance processing, above two inorganic agent is proportionally added into, and wherein oxygen scavenger is eventually adding.
2. the method for water-base drilling fluid pH value under the conditions of a kind of maintenance high temperature according to claim 1 and high saliferous, special
Sign is: the pH stabilizer is methyl monoethanolamine, methyl diethanolamine or dimethylethanolamine.
3. the method for water-base drilling fluid pH value under the conditions of a kind of maintenance high temperature according to claim 1 and high saliferous, special
Sign is: the oxygen scavenger is sodium sulfite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552390.8A CN109652034A (en) | 2018-12-18 | 2018-12-18 | A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552390.8A CN109652034A (en) | 2018-12-18 | 2018-12-18 | A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous |
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| CN109652034A true CN109652034A (en) | 2019-04-19 |
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| CN201811552390.8A Pending CN109652034A (en) | 2018-12-18 | 2018-12-18 | A method of maintaining water-base drilling fluid pH value under the conditions of high temperature and high saliferous |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115477930A (en) * | 2021-05-31 | 2022-12-16 | 中国石油天然气集团有限公司 | PH stabilizer for drilling fluid and application method thereof |
Citations (4)
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| US20040138069A1 (en) * | 2003-01-15 | 2004-07-15 | Sarkis Kakadjian | Drilling fluid with circulation loss reducing additive package |
| WO2009004219A2 (en) * | 2007-06-12 | 2009-01-08 | Lang Gerard | Additive for reducing hexavalent chromium, method for obtaining same and applications of said additive particularly in cement-based products |
| CN103333666A (en) * | 2013-06-14 | 2013-10-02 | 中国石油化工股份有限公司 | Solid-free well-completion confining liquid and preparation method thereof |
| CN108300444A (en) * | 2018-02-09 | 2018-07-20 | 塔里木大学 | It is a kind of to recover the oil with oil jacket annular protective liquid and preparation method thereof |
-
2018
- 2018-12-18 CN CN201811552390.8A patent/CN109652034A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040138069A1 (en) * | 2003-01-15 | 2004-07-15 | Sarkis Kakadjian | Drilling fluid with circulation loss reducing additive package |
| US20090291862A1 (en) * | 2003-01-15 | 2009-11-26 | Intevep, S.A. | Drilling fluid with circulation loss reducing additive package |
| WO2009004219A2 (en) * | 2007-06-12 | 2009-01-08 | Lang Gerard | Additive for reducing hexavalent chromium, method for obtaining same and applications of said additive particularly in cement-based products |
| CN103333666A (en) * | 2013-06-14 | 2013-10-02 | 中国石油化工股份有限公司 | Solid-free well-completion confining liquid and preparation method thereof |
| CN108300444A (en) * | 2018-02-09 | 2018-07-20 | 塔里木大学 | It is a kind of to recover the oil with oil jacket annular protective liquid and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115477930A (en) * | 2021-05-31 | 2022-12-16 | 中国石油天然气集团有限公司 | PH stabilizer for drilling fluid and application method thereof |
| CN115477930B (en) * | 2021-05-31 | 2023-06-30 | 中国石油天然气集团有限公司 | PH stabilizer for drilling fluid and application method thereof |
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Application publication date: 20190419 |