CN104531106B - A kind of efficient hydrate inhibition environmental protection drilling fluid - Google Patents
A kind of efficient hydrate inhibition environmental protection drilling fluid Download PDFInfo
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- CN104531106B CN104531106B CN201410764694.6A CN201410764694A CN104531106B CN 104531106 B CN104531106 B CN 104531106B CN 201410764694 A CN201410764694 A CN 201410764694A CN 104531106 B CN104531106 B CN 104531106B
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- drilling fluid
- hydrate
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- environmental protection
- drilling
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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
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
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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
- C09K8/14—Clay-containing compositions
- C09K8/16—Clay-containing compositions characterised by the inorganic compounds other than clay
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/22—Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The present invention relates to a kind of efficient hydrate inhibition environmental protection drilling fluid, more particularly to a kind of drilling fluid being made up of water, bentonite, quaternary ammonium salt type gemini surfactant, inorganic salts, sodium carboxymethyl starch, PAMC, solid anti sinking lubricant GFRH, exploited available for the petroleum resources of land or ocean, effectively suppress the generation of hydrate, and components of drilling liquid is small to environmental hazard, have the advantages that efficient, environmentally friendly.
Description
Technical field
The present invention relates to a kind of efficient hydrate inhibitive drilling fluid, and in particular to one kind is by water, bentonite, quaternary
Gemini surface active agent, inorganic salts, sodium carboxymethyl starch, PAMC, solid anti sinking lubricant GFRH are formed
Drilling fluid, it is mainly used in solving the problems, such as the generation of gas hydrates in deepwater drilling.
Background technology
Deep water hydrocarbon probing subsurface environment is severe, and operating condition is complicated, such as gas-bearing formation or gas hydrates layer,
The decomposition gas of formation gas or gas hydrates layer is scurried into pit shaft and annular space, with the Free water in drilling fluid in suitable condition
Under may form gas hydrates.The generation of hydrate makes drilling pressure unstable, and hydrate generation makes drilling fluid density
Increase, drilling pressure reduce.If hydrate decomposes with circulation of drilling fluid, the hydrate of generation under suitable Temperature-pressure Conditions, point
A large amount of gases that solution discharges can influence drilling pressure, and then influence the progress of drillng operation, increase operating cost.Therefore deep water
How to avoid hydrate from generating in drillng operation, be one of deepwater drilling problem encountered.
Complicated various, the inhibitory action that common process agent generates to hydrate of deepwater drilling liquid system composition applied at present
It is faint, therefore the research suppressed both at home and abroad with regard to hydrate in drilling fluid concentrates on the use of hydrate inhibitor.But deep water bores
In well in addition to facing natural gas and generating hydrate with drilling fluid, wellbore stability is also a great problem that deepwater drilling must pull against.
In consideration of it, researcher attempts to set about from shale inhibition additive for drilling fluid, it is aided with appropriate additive, and by gained drilling fluid
System carries out hydrate inhibition evaluation.
The content of the invention
It is an object of the invention to provide the drilling fluid that one can effectively suppress hydrate generation, the wellbore fluid is tied to form
It is point simply small to environmental hazard, effectively prevent the generation of hydrate in deepwater drilling.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of efficient hydrate inhibition environmental protection drilling fluid, include the component of following percentage by weight：Bentonite 4%~
10%th, quaternary ammonium salt type gemini surfactant 0.1%~1%, inorganic salts 5%~10%, sodium carboxymethyl starch 2%~4%, sun
Cationic polyacrylamide 0.2%~1%, solid anti sinking lubricant GFRH 1%~4%, surplus is water；
Above-mentioned quaternary ammonium salt type gemini surfactant structure is：
Wherein, R is straight chain dodecyl C12H25, X—For halide ion.
In drilling fluid of the present invention, inorganic salts are selected from sodium chloride or potassium chloride.The molecular weight of sodium carboxymethyl starch is preferably
350, the molecular weight of PAMC is preferably 4,000,000~15,000,000.The preferred lube systems of solid anti sinking lubricant GFRH
The modified graphite powder of number 80%.
The drilling fluid system that the present invention prepares has the following advantages that：
1. inhibition is good：Quaternary amine salt form Gemini surface active agent is used in combination with inorganic salts significantly reduces drilling fluid system
Cloud point, compared with traditional drilling fluid system inhibitor dosage it is few, suppress hydrate generation effect it is good.
2. in terms of cost：Quaternary amine salt form Gemini surface active agent components of drilling liquid different from the past, it, which has, significantly kills
Metal erosion can also effectively be suppressed while bacterium effect, therefore can significantly extend drilling fluid and drilling equipment service life, significantly
Reduce drilling cost.
3. environmentally friendly aspect：Most of components of drilling liquid easily biological-degradable, environmental pollution are small.
Embodiment
Further specific descriptions are done to the present invention below, but embodiments of the present invention are not limited to that.
Experimental provision major part is made up of autoclave, agitating device, water-bath and data collecting system.Its mesohigh
Reactor volume is 570mL, and maximum working pressure 20MPa, reactor bottom uses 98-2 magnetic stirring apparatus, the range of speeds 100
~1800r/min.Device water-bath uses ethylene glycol and water mixed liquid, controls -10 DEG C of temperature~0 DEG C, and temperature-controlled precision is 0.1 DEG C；
The parameters such as pressure, temperature, stir speed (S.S.) in reactor can be surveyed by computer data acquisition system automatic data collection and storage, temperature
0.01 DEG C of accuracy of measurement, pressure measurement accuracy 0.01MPa.
Embodiment 1~4 is prepared for the drilling fluid of different formulations and tests its hydrate rejection respectively, wherein used
Quaternary amine salt form Gemini surface active agent structure be：
Wherein, R is straight chain dodecyl C12H25, X—For halide ion.
The molecular weight of sodium carboxymethyl starch used is preferably 350, and the molecular weight of PAMC is preferably 4,000,000
~1,500 ten thousand.The modified graphite powder of the preferred lubricating coefficients 80% of solid anti sinking lubricant GFRH.
Embodiment 1：
Drilling fluid includes the component of following percentage by weight：Bentonite 4%, quaternary amine salt form Gemini surface active agent (X—=
Cl—) 0.1%, sodium chloride 5.0%, sodium carboxymethyl starch 2.0%, PAMC CPAM (molecular weight 4,000,000)
0.2%, solid anti sinking lubricant GFRH 1%.Experimental pressure 15.0MPa, 0 DEG C of temperature is controlled, experimental gas is purity 99.9%
Methane, 120h generates without hydrate all the time under experiment condition.
Embodiment 2：
Drilling fluid includes the component of following percentage by weight：Bentonite 6%, quaternary amine salt form Gemini surface active agent (X—=
Cl—) 0.4%, sodium chloride 8.0%, sodium carboxymethyl starch is 2.0%, PAMC CPAM (molecular weight 8,000,000)
0.5%, solid anti sinking lubricant GFRH is 2.0%.Experimental pressure 15.1MPa, -2.5 DEG C of temperature is controlled, experimental gas is purity
99.9% methane, 120h generates without hydrate all the time under experiment condition.
Embodiment 3：
Drilling fluid includes the component of following percentage by weight：Bentonite 8.0%, quaternary amine salt form Gemini surface active agent (X—
=Br—) 0.7%, potassium chloride 8.0%, sodium carboxymethyl starch 3.0%, PAMC CPAM (molecular weight 12,000,000)
1.0%, solid anti sinking lubricant GFRH control -4.0 DEG C of temperature, experimental gas is purity in 2.0%, experimental pressure 15.0MPa
99.9% methane, 120h generates without hydrate all the time under experiment condition.
Embodiment 4：
Drilling fluid includes the component of following percentage by weight：Bentonite 10.0%, quaternary amine salt form Gemini surface active agent (X—
=Br—) 1.0%, potassium chloride is 10.0%, sodium carboxymethyl starch 4.0%, PAMC CPAM (molecular weight 1500
Ten thousand) 1.0%, solid anti sinking lubricant GFRH 4.0%. experimental pressure 15.2MPa, control -4.0 DEG C of temperature, and experimental gas is pure
99.9% methane is spent, 120h generates without hydrate all the time under experiment condition.
Efficient hydrate inhibitive drilling fluid of the present invention, exploit available for the petroleum resources of land or ocean, effectively suppress
The generation of hydrate, and components of drilling liquid is small to environmental hazard, has the advantages that efficient, environmentally friendly.
Claims (3)
1. a kind of efficient hydrate inhibition environmental protection drilling fluid, it is characterised in that include the component of following percentage by weight：Swelling
Soil 4%~10%, quaternary ammonium salt type gemini surfactant 0.1%~1%, inorganic salts 5%~10%, sodium carboxymethyl starch 2%
~4%, PAMC 0.2%~1%, solid anti sinking lubricant GFRH 1%~4%, surplus is water；
The inorganic salts are selected from sodium chloride or potassium chloride；
The quaternary ammonium salt type gemini surfactant structure is：
Wherein, R is straight chain dodecyl, X—For halide ion.
2. efficient hydrate inhibitive drilling fluid as claimed in claim 1, it is characterised in that the cation polypropylene acyl
The molecular weight of amine is 4,000,000~15,000,000.
3. efficient hydrate inhibitive drilling fluid as claimed in claim 1, it is characterised in that the solid anti sinking lubricant
GFRH is the modified graphite powder of lubricating coefficient 80%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410764694.6A CN104531106B (en) | 2014-12-11 | 2014-12-11 | A kind of efficient hydrate inhibition environmental protection drilling fluid |
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| CN201410764694.6A CN104531106B (en) | 2014-12-11 | 2014-12-11 | A kind of efficient hydrate inhibition environmental protection drilling fluid |
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| Publication Number | Publication Date |
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| CN104531106A CN104531106A (en) | 2015-04-22 |
| CN104531106B true CN104531106B (en) | 2017-12-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542733B (en) * | 2015-12-15 | 2018-08-17 | 中国科学院广州能源研究所 | A kind of composite natral gas hydrate inhibitor |
| CN106010479B (en) | 2016-06-01 | 2017-05-24 | 中国石油大学(北京) | Drilling fluid additive composition, application thereof, oil-based drilling fluid and application thereof |
| CN106085383B (en) * | 2016-06-01 | 2017-07-04 | 中国石油大学(北京) | Lubricant of nano hybridization and its preparation method and application and oil base drilling fluid and its application |
| CN106634881B (en) | 2016-08-25 | 2017-11-14 | 中国石油大学(北京) | Compositions of additives and application and oil base drilling fluid and application suitable for oil base drilling fluid viscosity reduction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269864A (en) * | 1997-09-09 | 2000-10-11 | 国际壳牌研究有限公司 | Method and compound for inhibiting plugging of conduits by gas hydrates |
| US20040159041A1 (en) * | 2001-07-13 | 2004-08-19 | Uwe Dahlmann | Additives for inhibiting the formation of gas hydrates |
| CN101124384A (en) * | 2004-06-03 | 2008-02-13 | 贝克休斯公司 | Additives for hydrate inhibition in fluids gelled with viscoelastic surfactants |
| CN102234501A (en) * | 2010-04-27 | 2011-11-09 | 长江大学 | Ocean deepwater water-based constant-rheology drilling fluid |
-
2014
- 2014-12-11 CN CN201410764694.6A patent/CN104531106B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269864A (en) * | 1997-09-09 | 2000-10-11 | 国际壳牌研究有限公司 | Method and compound for inhibiting plugging of conduits by gas hydrates |
| US20040159041A1 (en) * | 2001-07-13 | 2004-08-19 | Uwe Dahlmann | Additives for inhibiting the formation of gas hydrates |
| CN101124384A (en) * | 2004-06-03 | 2008-02-13 | 贝克休斯公司 | Additives for hydrate inhibition in fluids gelled with viscoelastic surfactants |
| CN102234501A (en) * | 2010-04-27 | 2011-11-09 | 长江大学 | Ocean deepwater water-based constant-rheology drilling fluid |
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| CN104531106A (en) | 2015-04-22 |
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