CN108641683B - A kind of high salinity high-density water-based drilling fluid resistant to high temperatures and its application - Google Patents
A kind of high salinity high-density water-based drilling fluid resistant to high temperatures and its application Download PDFInfo
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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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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- 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
- C09K8/24—Polymers
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
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Abstract
The present invention relates to drilling technology fields, disclose a kind of heat resisting fluid loss reducing agent and preparation method thereof and water-base drilling fluid and its application, the heat resisting fluid loss reducing agent is copolymerized by a kind of monomer composition, the monomer composition contains dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, N,N-DMAA and p-methylstyrene.The present invention also provides the water-base drilling fluids for containing heat resisting fluid loss reducing agent of the present invention, and the water-base drilling fluid containing heat resisting fluid loss reducing agent of the present invention is applied to deep layer high temperature (220 DEG C) high salinity, and (saturated salt contains 1.0%CaCl2) under the conditions of probing in when, can show preferably to inhibit, rheology and filtrate loss controllability.
Description
Technical field
The present invention relates to drilling technology field, more particularly to a kind of heat resisting fluid loss reducing agent and preparation method thereof and water base
Drilling fluid and its application.
Background technique
Petroleum gas has important shadow as a kind of strategic resource, to a national economic security and stable development
It rings.As quickling increase for China's oil Natural Gas Demand is increasingly exhausted with Shallow Oil-Gas resource, China's economy and industry increase
Long external oil interdependency is continuously improved, and severe Energy situation, there is an urgent need to new to take over petroleum resources.According to second
National Oil Gas Resources evaluation result, China's oil total resources are 94,000,000,000 tons, and conventional gas stock number is 38,000,000,000,000 m3, remain
Remaining petroleum resources are mainly distributed on deep layer.Deep reservoir universal depth in China's is more than 5000m, at present most deep nearly 9000m, shaft bottom temperature
180~260 DEG C of degree, and there are big section saline beds in area mostly.Currently, grand celebration, the South Sea, Jilin, Xinjiang, Tarim Basin, huge port etc.
All implementing ultra-deep well drilling in oil field.Anti- superhigh temperature high density high salinity (saturation NaCl, CaCl2>=1%) drilling fluid is deep
Gypsum-salt stratum probing in portion's is successfully crucial, but existing high density high-salinity drilling fluid is difficult to meet high density, big section saline bed
Under the conditions of the requirement of anti-superhigh temperature, face in drilling engineering a series of cave-in caused by failures because of drilling fluids at high temperature, bit freezing and
The significant technology issues such as blowout.When deep prospecting, drilling fluids at high temperature failure causes to take rock and suspension weighting material is difficult, it is difficult to have
The effect support borehole wall, the serious accidents such as Yi Yinfa well slough, bit freezing, blowout even result in wellbore and scrap.Water base brill is used at present
Well liquid bores the well of superhigh temperature containing saline bed, main to maintain property of drilling fluid using increasing chemical treatments dosage, not only at high cost,
Inorganic agent consumption is big, processing is frequent, and drilling complexity accident is more, drilling speed is slow, drilling period is long, production safety and the public are pacified
Full blast is nearly big, seriously affects drilling quality, speed and benefit, and very causing, which influences geological target, realizes.
Therefore, the research of confrontation high temperature and high salinity high-density water-based drilling fluid has important practical significance.
Summary of the invention
The purpose of the invention is to overcome drawbacks described above existing for existing high density high salinity water-base drilling fluid, provide
A kind of heat resisting fluid loss reducing agent and preparation method thereof and water-base drilling fluid and its application.
To achieve the above object, in a first aspect, the present invention provides a kind of heat resisting fluid loss reducing agent, the drop filter resistant to high temperatures
Lose agent be copolymerized by a kind of monomer composition, the monomer composition contain dimethyl diallyl ammonium chloride, acrylamide,
2- acrylamide-2-methylpro panesulfonic acid, N, N- dimethylacrylamide and p-methylstyrene.
Second aspect, the present invention provides the preparation methods of above-mentioned heat resisting fluid loss reducing agent, this method comprises: as molten
In the presence of the water of agent, surfactant and initiator, by dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamide
Base -2- methyl propane sulfonic acid, N, N- dimethylacrylamide and p-methylstyrene carry out polymerization reaction.
The third aspect, the present invention provides a kind of water-base drilling fluid, which contains anti-height of the present invention
Temperature drop fluid loss agents, sulfonated-pheno-formoldehyde resin, sulfonated lignite resin, sulfonated gilsonite, potassium chloride, graphite, bentonite and water.
Fourth aspect, the present invention provides water-base drilling fluid of the present invention answering in the gypsum-salt stratum drilling well of deep
With.
In water-base drilling fluid of the present invention, by introducing heat resisting fluid loss reducing agent, sulfonated-pheno-formoldehyde resin, sulfonation
Walchowite can show preferably to press down so that water-base drilling fluid of the present invention is drilled suitable for deep gypsum-salt stratum
System, rheology and filtrate loss controllability.
Wherein, heat resisting fluid loss reducing agent molecular backbone is C-C key, and side chain contains the strong knot of the oxidation resistances such as C-S and C-N
Structure.The monomer with C=C unsaturated double-bond is selected to be copolymerized to obtain the polymer that main chain is C-C chain, due to C -- C single bond
Big (the 347.3KJ.mol of average bond energy-1), it is not susceptible to high temperature degradation；Introduce sulfonic group (- SO3H), clay particle table can be thickened
The hydration shell in face effectively keeps absorption position under high temperature, improves the thermal stability of drilling fluid, and not with Ca2+Reaction generates heavy
It forms sediment, anti-calcium and anti-salt can be played the role of, sulfonic group can also be by the negative charge density of increase clay particle surface, so that ζ is electric
Position increases, and increases the electrostatic repulsion between clay particle, improves the electrostatic stability of drilling fluid under high temperature；The groups such as phenyl ring are introduced,
The thermal stability and salt-resistance of inorganic agent can be improved in the hydrolysis for inhibiting strand to a certain degree.
Supermolecular mechanism occurs for heat resisting fluid loss reducing agent and sulfonated-pheno-formoldehyde resin and sulfonated lignite resin, in the high mine of high temperature
Dynamic physical grid structure is associated under the conditions of change degree, so that macro-radical protects body there are more physical crosslinking point
Fine particles present in system, and the flowing of Free water in cross-linked network structure is limited, to reduce the filter of drilling fluid system
Vector.Dynamic physical grid structure can also be adsorbed on mud cake surface by hydrophily sulfonate groups, amide group, make mud cake
Densification further decreases drilling fluid filtration.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
In a first aspect, the heat resisting fluid loss reducing agent is by a kind of monomer the present invention provides a kind of heat resisting fluid loss reducing agent
Composition is copolymerized, and the monomer composition contains dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido-
2- methyl propane sulfonic acid, N, N- dimethylacrylamide and p-methylstyrene.
In the monomer composition, dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl
The molar ratio of propane sulfonic acid, N, N- dimethylacrylamide and p-methylstyrene is 1:(0.5-3): (1-5): (0.5-5):
(0.5-4).In the preferred case, in order to further increase the thermal stability and anti-salt property of heat resisting fluid loss reducing agent, diformazan
Base diallyl ammonium chloride, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, N, N- dimethylacrylamide and to first
The molar ratio of base styrene is 1:(1.5-2.5): (3-5): (1-3): (1-3).
Second aspect, the present invention provides the preparation methods of the heat resisting fluid loss reducing agent, this method comprises: as molten
In the presence of the water of agent, surfactant and initiator, by dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamide
Base -2- methyl propane sulfonic acid, N, N- dimethylacrylamide and p-methylstyrene carry out polymerization reaction.
In method of the present invention, relative to the water of 100 parts by weight, the dosage of the surfactant can be 0.1-
0.5 parts by weight, the dosage of the initiator can be 8-12 parts by weight, and the dosage of the dimethyl diallyl ammonium chloride can be with
For 1-10 parts by weight；
In method of the present invention, methyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl-prop
The dosage molar ratio of sulfonic acid, N, N- dimethylacrylamide and p-methylstyrene can be 1:(0.5-3): (1-5): (0.5-
5): (0.5-4), preferably 1:(1.5-2.5): (3-5): (1-3): (1-3).
In method of the present invention, in order to further increase the thermal stability and salt-resistance of heat resisting fluid loss reducing agent
Can, under preferable case, the initiator is water-soluble azo class initiator, further preferably azo-bis-isobutyrate hydrochloride,
At least one of two isobutyl imidazoline hydrochloride of azo, azo dicyano valeric acid and azo dicyclohexyl formonitrile HCN.
In method of the present invention, in order to further increase the thermal stability and salt-resistance of heat resisting fluid loss reducing agent
Can, under preferable case, the surfactant is sulfuric acid lipid surfactant, further preferably lauryl sodium sulfate.
In method of the present invention, the condition of the polymerization reaction may include: that pH is 6.5-7.5, temperature 40-
60 DEG C, time 5-8h.In order to further increase the thermal stability and anti-salt property of heat resisting fluid loss reducing agent, most preferably,
The condition of the polymerization reaction includes: that pH is 7, and temperature is 50 DEG C, time 6h.
In method of the present invention, it is both needed to post-process product after reaction, it such as can be anti-using acetone
Then multiple purification is dried (such as at 100 DEG C), is crushed to get powdered heat resisting fluid loss reducing agent.
In a specific embodiment, the preparation method of the heat resisting fluid loss reducing agent includes: by 2- acrylamido-
2- methyl propane sulfonic acid is dissolved in deionized water, sequentially adds acrylamide, N,N-DMAA, two allyl of dimethyl
Ammonium chloride and lauryl sodium sulfate, stir 10-30min, such as with sodium hydrate regulator solution pH value be 7, under stiring
P-methylstyrene is added, at the reaction temperatures, reacts 20-40min under nitrogen protection, two NSC 18620 salt of azo is then added
Hydrochlorate reacts 3-8h, and viscous liquid product is made.Products therefrom is purified repeatedly with acetone, then dry, crush to get
Powdered heat resisting fluid loss reducing agent.
In the present invention, the azo-bis-isobutyrate hydrochloride can add in form of an aqueous solutions.The azo two used is different
The concentration of Butanimidamide, monohydrochloride aqueous solution can be 0.5-2 weight %, most preferably 1 weight %.
The third aspect, the present invention provides a kind of water-base drilling fluid, which contains anti-height of the present invention
Temperature drop fluid loss agents, sulfonated-pheno-formoldehyde resin, sulfonated lignite resin, sulfonated gilsonite, sulfonated lignite, potassium chloride, graphite, bentonite and
Water.
In water-base drilling fluid of the present invention, relative to the water of 100 parts by weight, the heat resisting fluid loss reducing agent contains
Amount is 2-4 parts by weight, the content of the sulfonated-pheno-formoldehyde resin is 3-5 parts by weight, the content of the sulfonated lignite resin is 3-5
Parts by weight, the content of the sulfonated gilsonite are 3-5 parts by weight, the content of the sulfonated lignite is 3-5 parts by weight, the potassium chloride
Content be 1-3 parts by weight, the content of the graphite is 1-3 parts by weight, the bentonitic content is 2-5 parts by weight.
In water-base drilling fluid of the present invention, the sulfonated lignite resin can be the conventional selection of this field, example
It is such as provided by China Petroleum Group Engineering and Technology Research Institute, trade mark SPNH.
In water-base drilling fluid of the present invention, the sulfonated lignite can be the conventional selection of this field, such as by
China Petroleum Group Engineering and Technology Research Institute provides, trade mark SMC.
In water-base drilling fluid of the present invention, the sulfonated gilsonite can be commercial product, such as purchased from Chinese stone
Oily group's drilling engineering Institute for Research and Technology.
In water-base drilling fluid of the present invention, the sulfonated-pheno-formoldehyde resin can be the conventional selection of this field,
Such as purchased from China Petroleum Group Engineering and Technology Research Institute, the trade mark is the sulfonated-pheno-formoldehyde resin product of SMP-II.
In water-base drilling fluid of the present invention, the bentonite can be the conventional selection of this field, such as can be with
It selects and is purchased from the street Xinjiang Zhong Feixiazi bentonite Co., Ltd.
In the present invention, for the preparation method of water-base drilling fluid, there is no particular limitation, as long as by aforementioned content by each group
Divide mixing.
Fourth aspect, the present invention provides water-base drilling fluid of the present invention answering in the gypsum-salt stratum drilling well of deep
With.
Embodiment
The present invention will be described in detail by way of examples below, but is not intended to limit the present invention.Following preparation example,
In embodiment and comparative example, unless otherwise instructed, material therefor is commercially available, and method used is the routine of this field
Method.
Sulfonated lignite SMC, sulfonated lignite resin SPNH, sulfonated-pheno-formoldehyde resin SMP-II and sulfonated gilsonite are by China Petroleum
Engineering and technological research institute, group provides.
Polymer coating agent JT888, graphite and potassium chloride are purchased from Chengdu Chun Feng Petroleum Technology Co., Ltd.
Bentonite is purchased from the street Xinjiang Zhong Feixiazi bentonite Co., Ltd
Heat resisting fluid loss reducing agent is obtained according to following preparation example.
Dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, N, N- dimethyl propylene
Acrylamide and p-methylstyrene are purchased from Chengdu Gracia chemical technology Co., Ltd
Lauryl sodium sulfate, azo-bis-isobutyrate hydrochloride, two isobutyl imidazoline hydrochloride of azo and azo diisopropyl
Base imidazoline is purchased from Chengdu Gracia chemical technology Co., Ltd.
Preparation example 1
It is in the three-necked flask equipped with thermometer, mechanical agitator, 5g 2- acrylamide-2-methylpro panesulfonic acid is molten
In 100g deionized water, according still further to dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl-prop sulphur
The molar ratio of acid, N,N-DMAA and p-methylstyrene is the ratio of 1:2:4:2:2, sequentially adds acryloyl
Lauryl sodium sulfate is added in amine, N,N-DMAA, dimethyl diallyl ammonium chloride and p-methylstyrene
0.3g, with sodium hydrate regulator solution pH be 7, after reaction unit is sealed, pour nitrogen and be sufficiently stirred, be added mass concentration be
1% azo-bis-isobutyrate hydrochloride 10g obtains viscous liquid product in 50 DEG C of reaction 6h.Repeatedly with acetone by products therefrom
Purification, and at 100 DEG C dries pulverizing to get powdered heat resisting fluid loss reducing agent A1.
Preparation example 2
It is in the three-necked flask equipped with thermometer, mechanical agitator, 1g 2- acrylamide-2-methylpro panesulfonic acid is molten
In 100g deionized water, according still further to dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl-prop sulphur
The molar ratio of acid, N,N-DMAA and p-methylstyrene is the ratio of 1:1.5:3:1:1, sequentially adds acryloyl
Lauryl sodium sulfate is added in amine, N,N-DMAA, dimethyl diallyl ammonium chloride and p-methylstyrene
0.1g is 6.5 with sodium hydrate regulator solution pH, after reaction unit is sealed, pours nitrogen and be sufficiently stirred, mass concentration is added
Thick liquid is obtained in 40 DEG C of reaction 8h for 1% azo-bis-isobutyrate hydrochloride 3g, two isobutyl imidazoline hydrochloride 5g of azo
Body product.Products therefrom is purified repeatedly with acetone, and at 100 DEG C dries pulverizing to get powdered heat resisting fluid loss reducing agent
A2。
Preparation example 3
It is in the three-necked flask equipped with thermometer, mechanical agitator, 10g 2- acrylamide-2-methylpro panesulfonic acid is molten
In 100g deionized water, according still further to dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl-prop sulphur
The molar ratio of acid, N,N-DMAA and p-methylstyrene is the ratio of 1:2.5:5:3:3, sequentially adds acryloyl
Lauryl sodium sulfate is added in amine, N,N-DMAA, dimethyl diallyl ammonium chloride and p-methylstyrene
0.5g is 7.5 with sodium hydrate regulator solution pH, after reaction unit is sealed, pours nitrogen and be sufficiently stirred, mass concentration is added
Viscous liquid product is obtained in 60 DEG C of reaction 5h for 1% azo dicyclohexyl formonitrile HCN 12g.Products therefrom acetone is anti-
Multiple purification, and at 100 DEG C dries pulverizing to get powdered heat resisting fluid loss reducing agent A3.
Compare preparation example 1
Heat resisting fluid loss reducing agent is prepared according to the method for preparation example 1, unlike, it is added without dimethyl diallyl chlorination
Heat resisting fluid loss reducing agent DA1 is made in ammonium.
Compare preparation example 2
Heat resisting fluid loss reducing agent is prepared according to the method for preparation example 1, unlike, it is added without acrylamide, anti-height is made
Temperature drop fluid loss agents DA2.
Compare preparation example 3
Heat resisting fluid loss reducing agent is prepared according to the method for preparation example 1, unlike, it is added without 2- acrylamido -2- first
Heat resisting fluid loss reducing agent DA3 is made in base propane sulfonic acid.
Compare preparation example 4
Heat resisting fluid loss reducing agent is prepared according to the method for preparation example 1, unlike, it is added without N, N- dimethyl allene acyl
Heat resisting fluid loss reducing agent DA4 is made in amine.
Compare preparation example 5
Heat resisting fluid loss reducing agent is prepared according to the method for preparation example 1, unlike, it is added without p-methylstyrene, is made
Heat resisting fluid loss reducing agent DA5.
Embodiment 1
Water-base drilling fluid Fl: (preparation example 1 is prepared anti-for 100 parts by weight of water, 4 parts by weight of bentonite, heat resisting fluid loss reducing agent
High temperature fluid loss additive A1) 4 parts by weight, II 5 parts by weight of sulfonated-pheno-formoldehyde resin SMP-, 5 parts by weight of sulfonated lignite resin SPNH,
5 parts by weight of sulfonated gilsonite, 5 parts by weight of sulfonated lignite SMC, 3 parts by weight of potassium chloride, 3 parts by weight of graphite.
Embodiment 2
Water-base drilling fluid F2: 100 parts by weight of water, 3 parts by weight of bentonite, heat resisting fluid loss reducing agent 3 parts by weight (preparation example 2
The heat resisting fluid loss reducing agent A2 of preparation), II 4 parts by weight of sulfonated-pheno-formoldehyde resin SMP-, 4 parts by weight of sulfonated lignite resin SPNH,
4 parts by weight of sulfonated gilsonite, 4 parts by weight of sulfonated lignite SMC, 2 parts by weight of potassium chloride, 2 parts by weight of graphite.
Embodiment 3
Water-base drilling fluid F3: (preparation example 3 is prepared resistant to high temperatures for 100 parts of water, 2 parts by weight of bentonite, heat resisting fluid loss reducing agent
Fluid loss additive A3) 2 parts by weight, II 3 parts by weight of sulfonated-pheno-formoldehyde resin SMP-, 3 parts by weight of sulfonated lignite resin SPNH, sulfonation
3 parts by weight of pitch, 3 parts by weight of sulfonated lignite SMC, 1 parts by weight of potassium chloride, 1 parts by weight of graphite.
Comparative example 1
According to the method for embodiment 1, be added without heat resisting fluid loss reducing agent A1 in water-base drilling fluid unlike, i.e., according to
Lower recipe configuration water-base drilling fluid DFl: 100 parts by weight of water, 4 parts by weight of bentonite, II 5 weight of sulfonated-pheno-formoldehyde resin SMP-
Part, 5 parts by weight of sulfonated lignite resin SPNH, 5 parts by weight of sulfonated gilsonite, 5 parts by weight of sulfonated lignite resin SMC, 3 weight of potassium chloride
Measure part, 3 parts by weight of graphite.
Comparative example 2
Comparison water-base drilling fluid DF2: 100 parts by weight of water, 4 parts by weight of bentonite, polymer packet is prepared according to formula as below
By 3 parts by weight of agent JT888, II 5 parts by weight of sulfonated-pheno-formoldehyde resin SMP-, 5 parts by weight of sulfonated lignite resin SPNH, sulfonation drip
Green 5 parts by weight, 5 parts by weight of sulfonated lignite resin SMC, 3 parts by weight of potassium chloride, 3 parts by weight of graphite.
Comparative example 3
Water-base drilling fluid is prepared according to the method for embodiment 1, unlike, heat resisting fluid loss reducing agent used is DA1, system
Obtain water-base drilling fluid DF3.
Comparative example 4
Water-base drilling fluid is prepared according to the method for embodiment 1, unlike, heat resisting fluid loss reducing agent used is DA2, system
Obtain water-base drilling fluid DF4.
Comparative example 5
Water-base drilling fluid is prepared according to the method for embodiment 1, unlike, heat resisting fluid loss reducing agent used is DA3, system
Obtain water-base drilling fluid DF5.
Comparative example 6
Water-base drilling fluid is prepared according to the method for embodiment 1, unlike, heat resisting fluid loss reducing agent DA4 used is made
Water-base drilling fluid DF6.
Comparative example 7
Water-base drilling fluid is prepared according to the method for embodiment 1, unlike, heat resisting fluid loss reducing agent used is DA5, system
Obtain water-base drilling fluid DF7.
Test case 1
The above-mentioned drilling fluid Fl-F3 and DF1-DF7 of 400mL is taken respectively, and sodium chloride is added to saturation and 1.0wt% is added
CaCl2, after stirring 20min at 5000rpm, it is packed into ageing can, is put into roller furnace, at 220 DEG C, after constant temperature rolls 16h,
Taking-up is cooled to room temperature, then 20min is stirred at 5000rpm, then measures above-mentioned brill respectively according to GB/T16783.1-2006
The apparent viscosity (AV, mPa.s) of well liquid, plastic viscosity (PV, mPa.s), yield value (YP, Pa), 10s and 10min gel strength, in
Press API dehydration (FL, mL) and high temperature and pressure dehydration (FLHTHP, mL, 220 DEG C), it the results are shown in Table 1.
Table 1
As can be seen from the data in table 1, in saturated sodium-chloride, 1.0wt%CaCl2Under the conditions of, water-base drilling fluid of the invention is still
So have lower API filtration and high temperature and high pressure filter loss, show water-base drilling fluid of the invention meet saturated sodium-chloride,
1.0wt%CaCl2Under the conditions of it is resistant to high temperatures (220 DEG C) requirement.
Test case 2
The above-mentioned drilling fluid Fl-F3 and DF1-DF7 of 400mL is taken respectively, and sodium chloride is added to saturation and 1.0wt% is added
CaCl2, being weighed out to density with barite is 2.2g/cm3, after stirring 20min at 5000rpm, it is packed into ageing can, is put into roller
In furnace, at 220 DEG C, constant temperature roll 16h after, taking-up is cooled to room temperature, then 20min is stirred at 5000rpm, then according to
GB/T16783.1-2006 measures the apparent viscosity (AV, mPa.s) of above-mentioned drilling fluid respectively, plastic viscosity (PV, mPa.s), moves
Shear force (YP, Pa), 10s and 10min gel strength, middle pressure API dehydration (FL, mL) and high temperature and pressure dehydration (FLHTHP, mL, 220
DEG C), it the results are shown in Table 2.
Table 2
By the data of table 2 it is found that density is 2.2g/cm3, saturated sodium-chloride, 1.0wt%CaCl2Under the conditions of, it is of the invention
Water-base drilling fluid has lower API filtration and high temperature and high pressure filter loss, shows that water-base drilling fluid of the invention meets high mine
(220 DEG C) requirements resistant to high temperatures under change degree conditions of high density.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of water-base drilling fluid, which is characterized in that the water-base drilling fluid contains heat resisting fluid loss reducing agent, sulphur methyl phenolic aldehyde tree
Rouge, sulfonated lignite resin, sulfonated gilsonite, sulfonated lignite, potassium chloride, graphite, bentonite and water, wherein the drop filter resistant to high temperatures
Lose agent be copolymerized by a kind of monomer composition, the monomer composition contain dimethyl diallyl ammonium chloride, acrylamide,
2- acrylamide-2-methylpro panesulfonic acid, N, N- dimethylacrylamide and p-methylstyrene；
In the monomer composition, dimethyl diallyl ammonium chloride, acrylamide, 2- acrylamido -2- methyl-prop sulphur
The molar ratio of acid, N, N- dimethylacrylamide and p-methylstyrene is 1:(0.5-3): (1-5): (0.5-5): (0.5-4)；
Relative to the water of 100 parts by weight, the content of the heat resisting fluid loss reducing agent is 2-4 parts by weight, the sulphur methyl phenolic aldehyde tree
The content of rouge is 3-5 parts by weight, the content of the sulfonated lignite resin is 3-5 parts by weight, the content of the sulfonated gilsonite is 3-5
Parts by weight, the content of the sulfonated lignite be 3-5 parts by weight, the content of the potassium chloride is that 1-3 parts by weight, the graphite contain
Amount is 1-3 parts by weight, the bentonitic content is 2-5 parts by weight.
2. water-base drilling fluid according to claim 1, wherein in the monomer composition, dimethyl diallyl chlorine
Change ammonium, acrylamide, 2- acrylamide-2-methylpro panesulfonic acid, N, N- dimethylacrylamide and p-methylstyrene rub
You are than being 1:(1.5-2.5): (3-5): (1-3): (1-3).
3. water-base drilling fluid according to claim 1 or 2, wherein the preparation method of the heat resisting fluid loss reducing agent includes:
In the presence of the water, surfactant and initiator as solvent, by dimethyl diallyl ammonium chloride, acrylamide, 2-
Acrylamide-2-methylpro panesulfonic acid, N, N- dimethylacrylamide and p-methylstyrene carry out polymerization reaction.
4. water-base drilling fluid according to claim 3, wherein relative to the water of 100 parts by weight, the surfactant
Dosage is 0.1-0.5 parts by weight, and the dosage of the initiator is 8-12 parts by weight, the use of the dimethyl diallyl ammonium chloride
Amount is 1-10 parts by weight.
5. water-base drilling fluid according to claim 4, wherein the initiator is water-soluble azo class initiator.
6. water-base drilling fluid according to claim 5, wherein the water-soluble azo class initiator is two NSC 18620 of azo
At least one of hydrochloride, two isobutyl imidazoline hydrochloride of azo, azo dicyano valeric acid and azo dicyclohexyl formonitrile HCN.
7. water-base drilling fluid according to any one of claims 4 to 6, wherein the surfactant is sulfuric acid lipid
Surfactant.
8. water-base drilling fluid according to any one of claims 4 to 6, wherein the condition of the polymerization reaction includes:
PH is 6.5-7.5, and temperature is 40-60 DEG C, time 5-8h.
9. application of the water-base drilling fluid described in any one of claim 1-8 in the gypsum-salt stratum drilling well of deep.
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| CN109852353B (en) * | 2019-01-22 | 2021-03-16 | 北京宏勤石油助剂有限公司 | High-temperature-resistant fluid loss additive for drilling fluid and preparation method thereof |
| CN109867742A (en) * | 2019-03-14 | 2019-06-11 | 广汉恒奕石油技术开发有限责任公司 | A kind of production method of third ethylene copolymer |
| CN114316925A (en) * | 2020-10-10 | 2022-04-12 | 中国石油天然气股份有限公司 | Fluid loss additive composition, fluid loss additive, water-based drilling fluid composition and water-based drilling fluid |
| CN114805680B (en) * | 2022-05-24 | 2023-04-28 | 中国石油大学(华东) | Environment-friendly high-temperature-resistant salt-resistant tackifier for water-based drilling fluid and preparation method and application thereof |
| CN116082570B (en) * | 2023-01-11 | 2024-06-07 | 西南石油大学 | Nano composite filtrate reducer for high-temperature-resistant water-based drilling fluid and preparation method thereof |
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