CN109321216A - A kind of high-temperature resistant water-based filtrate reducer for drilling fluid and preparation method thereof - Google Patents
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid and preparation method thereof Download PDFInfo
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- 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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- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
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Abstract
The invention discloses a kind of high-temperature resistant water-based filtrate reducer for drilling fluid and preparation method thereof, which is prepared by the raw material of following mass parts: 700 parts of sulfonated-pheno-formoldehyde resin, 3~8 parts of formaldehyde, 6~15 parts of melamine, 8~20 parts of Sulfonates monomer, 40~80 parts of acrylamide monomers, 0.5~2 part of crosslinking agent, 0.3~0.6 part of initiator, 60~80 parts of water.The present invention is by being modified sulfonated-pheno-formoldehyde resin, then copolyreaction is carried out with various of monomer, high-temperature resistant water-based filtrate reducer for drilling fluid is synthesized by the aquation group of increase product, introducing new sulfonic group and aromatic ring structure, the needs of the safety drilling construction under the hot environment of shaft bottom can be met, rheological characteristic, suspension stability under water-base drilling fluid high-temperature and high-pressure conditions can be controlled, the high temperature and high pressure filter loss of drilling fluid is effectively reduced.
Description
Technical field
The present invention relates to a kind of high temperature resistant drilling fluids fluid loss additives and preparation method thereof, belong to oil field chemical technology of preparing
Field.
Background technique
With the increasing of Deep Oil And Gas Exploration exploration and development dynamics, drilling strata becomes increasingly complex.In general, well is deeper, well
Lower pressure and temperature can be higher, and drilling completion is faced difficult also just bigger.In the world all there is high temperature and pressure in many places
Stratum.The area that such as U.S., the North Sea have exploited, it is more than 200 DEG C that many reservoir pressures, which are more than 100MPa, bottom hole temperature (BHT),.At me
The land southwest Tarim of state, the NE Sichuan in Sichuan, grand celebration Xu family's defensive wall, all there is different journeys for South Sea Yingqiong basin of ocean etc.
The high temperature of degree, drilling well and complete well problem under high pressure.Sulfonated-pheno-formoldehyde resin or sulfonated phenol formaldehyde resin (SMP) are this field scenes
Common high temperature and pressure fluid loss additive, is a kind of anionic water-soluble polyelectrolyte, has very strong temperature resistant capability, and product is reddish brown
Color powder, soluble easily in water, aqueous solution is in alkalescent, and the filtrate reducer for drilling fluid as heatproof can be effectively reduced drilling fluid
High temperature and high pressure filter loss, it is ideal height that " three sulphur drilling fluids " system can be prepared by, which being used in conjunction with SMC, SMT or SMK etc.,
One of warm deep drilling liquid system, production technology is highly developed.Sulfonated-pheno-formoldehyde resin uses conventional method in that art
Preparation, referring specifically to document: the design of drilling fluid chemicals and new product development, Shaanxi Xi'an: publishing house of Northwest University, 2006:
256-258.The country is directed to the needs of ultra-deep well drilling, has carried out some explorations in terms of ultra-deep well drilling liquid, but in synthesis
Needs are not met by performance, the country has carried out ultra-high temperature drilling liquid system research thus, handles using high-temperature resistant polymer
The compatibilities such as agent and sulfonated phenol formaldehyde resin, sulfonated lignite, the stable fresh water-based drilling fluid system of performance at available 220 DEG C.
CN201410240395.2 discloses a kind of fluid loss additive for boring fluid and preparation method thereof, by sulfonated phenol formaldehyde resin and formaldehyde,
Hydroxyalkyl aldehyde, aliphatic ketone or alicyclic ketone, pyrosulfite, anhydrous sulphite react certain time at high temperature under high pressure and obtain one
Kind modification sulphonation phenolic resin class fluid loss additive.
Herein on basis, carry out the research that some various of monomer copolymerization prepare fluid loss additive both at home and abroad,
Disclosed in CN103130953A it is a kind of with acrylamide, 2- acrylamide-2-methylpro panesulfonic acid and polyvinylpyrrolidone,
Dimethyl diallyl ammonium chloride is the polymer filtrate reducer of raw material, has good filtrate loss controllability, rheology control at 220 DEG C
Performance processed；CN101531887B is disclosed with N, N- acrylamide, 2- methyl -2- acryamidopropanesulfonic acid, N- second
Vinyl pyrrolidone polymerize the copolymer generated with dimethyl diallyl ammonium chloride, and temperature resistance is up to 245 DEG C.But if only with anti-
High temperature polymer fluid loss additive must just be reached by improving its dosage, but with the increase of polymer dosage, system liquid phase
Viscosity increases, and brings unfavorable factor to the control of high density drilling fluid rheological characteristic；On the other hand, the cost one of multiple copolymer
As much higher than heat resisting fluid loss reducing agent currently on the market, be unfavorable for market competition.
Summary of the invention
The technical issues of to solve the prior art, it is an object of the invention to a kind of high temperature for effectively reducing drilling fluid is high
The fluid loss additive of filter pressing loss.
Specifically, a kind of high-temperature resistant water-based filtrate reducer for drilling fluid, the fluid loss agents are obtained by the raw material preparation of following mass parts
: 700 parts of sulfonated-pheno-formoldehyde resin, 3~8 parts of formaldehyde, 6~15 parts of melamine, 8~20 parts of Sulfonates monomer, acryloyl
40~80 parts of amine monomers, 0.5~2 part of crosslinking agent, 0.3~0.6 part of initiator, 60~80 parts of water.
Further, the Sulfonates monomer is sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, 2- third
At least one of acrylamide -2- methylpropene sodium sulfonate.
Further, the acrylamide monomers are acrylamide, N,N-DMAA, N, N- diethyl third
At least one of acrylamide.
Further, the crosslinking agent is N, N- methylene-bisacrylamide.
Further, the initiator is oxidation-reduction initiator, and wherein the mass ratio of oxidant and reducing agent is 1:1,
Oxidant is potassium peroxydisulfate or ammonium persulfate, and reducing agent is sodium hydrogensulfite or sodium sulfite.
Further, the mass fraction of sulfonated-pheno-formoldehyde resin is 34~36%, and the mass fraction of formaldehyde is 36~38%.
Second aspect, the present invention also provides the preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid, the party
Method the following steps are included:
(1) after mixing sulfonated-pheno-formoldehyde resin with formaldehyde, the pH value of solution is adjusted to 8.0-8.5, trimerization is then added
After cyanamide reaction, modified sulfonated-pheno-formoldehyde resin is obtained；
(2) by modified sulfonated-pheno-formoldehyde resin, Sulfonates monomer, acrylamide monomers, N, N- di-2-ethylhexylphosphine oxide
Acrylamide, initiator are warming up to 30~50 DEG C of reactions after mixing evenly, obtain gel-like product；
(3) after being granulated, dry by gained gel-like product, crushing, high-temperature resistant water-based filtrate reducer for drilling fluid is obtained.
Further, in step (1), sulfonated-pheno-formoldehyde resin is added in autoclave, stirring is started, then by matching
Than water, formaldehyde are successively added into reaction kettle, melamine, 60~65 DEG C of 10~15min of heating water bath are added after adjusting pH value
Afterwards, it is brought rapidly up to 70~80 DEG C, then 60~90min of hydroxymethylation is cooled to 10~20 DEG C.
Further, in step (1), the reagent for adjusting solution ph is at least one of diethanol amine, triethanolamine.
Further, in step (3), the temperature of drying is 80~120 DEG C.
The invention has the benefit that the present invention utilizes sulfonated-pheno-formoldehyde resin temperature resistance and inexpensive advantage, by sulphur
Methyl phenolic resin is modified, and copolyreaction is then carried out with various of monomer, i.e., by increasing the aquation group of product, introducing
New sulfonic group and aromatic ring structure synthesizes high-temperature resistant water-based filtrate reducer for drilling fluid, can meet the safety under the hot environment of shaft bottom
The needs of wellbore construction can control rheological characteristic, suspension stability under water-base drilling fluid high-temperature and high-pressure conditions, effectively reduce brill
The high temperature and high pressure filter loss of well liquid.Fluid loss additive of the invention has good filtrate reducing ability resistant to high temperatures, adds in 4% base slurry
After entering product of the present invention, through 260 DEG C/16h aging, with the increase of the fluid loss additive dosage of the invention, filter loss is decreased,
When product dosage is 0.01g/mL, filter loss is down to 8.6mL by 45.0mL, and drilling fluid is made to keep good under the conditions of 260 DEG C
Performance.
Specific embodiment
Technical solution of the present invention is illustrated to be clearer, below in conjunction with specific embodiment to skill of the invention
Art scheme is further elaborated:
In a specific embodiment of the invention, a kind of high-temperature resistant water-based filtrate reducer for drilling fluid is provided, it should
Fluid loss agents are prepared by the raw material of following mass parts: 700 parts of sulfonated-pheno-formoldehyde resin, 3~8 parts of formaldehyde, melamine 6~15
Part, 8~20 parts of Sulfonates monomer, 40~80 parts of acrylamide monomers, 0.5~2 part of crosslinking agent, initiator 0.3~0.6
Part, 60~80 parts of water.
The present invention is using sulfonated-pheno-formoldehyde resin temperature resistance and inexpensive advantage, in conjunction with the feature that multiple copolymer is resistant to high temperatures,
The new multiple copolymer containing sulfonated-pheno-formoldehyde resin is developed, is guaranteeing to effectively reduce on high temperature resistant property basis
This.
Further, the Sulfonates monomer is sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, 2- third
At least one of acrylamide -2- methylpropene sodium sulfonate.The addition of the Sulfonates monomer introduces new sulfonic group.
Further, the acrylamide monomers are acrylamide, N,N-DMAA, N, N- diethyl third
At least one of acrylamide.The acrylamide monomers increase aquation group.
Further, the crosslinking agent is N, N- methylene-bisacrylamide.Crosslinking agent double bond containing there are two,
Using N, N- methylene-bisacrylamide is to preferably participate in cross-linking reaction, and other kinds of reaction can reduce crosslinking speed
Rate.
Further, the initiator is oxidation-reduction initiator, and wherein the mass ratio of oxidant and reducing agent is 1:1,
Oxidant is potassium peroxydisulfate or ammonium persulfate, and reducing agent is sodium hydrogensulfite or sodium sulfite.The oxidant is cheap and easy to get, draws
It is low to send out temperature, is common oxidation-reduction initiator.At a certain temperature, persulfate decomposites free radical initiation monomer
Polymerization, and sulphite can reduce activation energy, to reduce initiation temperature.
Further, the mass fraction of sulfonated-pheno-formoldehyde resin is 34~36%, and the mass fraction of formaldehyde is 36~38%.
Second aspect, the present invention also provides the preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid, the party
Method the following steps are included:
(1) after mixing sulfonated-pheno-formoldehyde resin with formaldehyde, the pH value of solution is adjusted to 8.0-8.5, trimerization is then added
After cyanamide reaction, modified sulfonated-pheno-formoldehyde resin is obtained；
(2) by modified sulfonated-pheno-formoldehyde resin, Sulfonates monomer, acrylamide monomers, N, N- di-2-ethylhexylphosphine oxide
Acrylamide, initiator are warming up to 30~50 DEG C of reactions after mixing evenly, obtain gel-like product；
(3) after being granulated, dry by gained gel-like product, crushing, the high-temperature resistant water-based filtrate reducer for drilling fluid is obtained.
Then the method for the present invention carries out copolyreaction with various of monomer, i.e., by being modified to sulfonated-pheno-formoldehyde resin
High-temperature resistant water-based drilling fluid filtrate reducing is synthesized by the aquation group of increase product, introducing new sulfonic group and aromatic ring structure
Agent can meet the needs of the safety drilling construction under the hot environment of shaft bottom, can control under water-base drilling fluid high-temperature and high-pressure conditions
Rheological characteristic, suspension stability effectively reduce the high temperature and high pressure filter loss of drilling fluid.
Further, in step (1), sulfonated-pheno-formoldehyde resin is added in autoclave, stirring is started, then by matching
Than water, formaldehyde are successively added into reaction kettle, melamine, 60~65 DEG C of 10~15min of heating water bath are added after adjusting pH value
Afterwards, it is brought rapidly up to 70~80 DEG C, then 60~90min of hydroxymethylation is cooled to 10~20 DEG C.
Further, in step (1), the reagent for adjusting solution ph is at least one of diethanol amine, triethanolamine.
Further, in step (3), the temperature of drying is 80~120 DEG C.
Above-mentioned specific embodiment is further illustrated below by embodiment, but is not therefore limited the present invention to described
Scope of embodiments among.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or presses
It is selected according to product manual.Do not make the reagent, raw material and instrument and equipment illustrated can directly be bought by commercial sources.
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment 1
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid is prepared by the raw material of following mass parts: sulfonated-pheno-formoldehyde resin
700 parts, 3 parts of formaldehyde, 6 parts of melamine, 8 parts of sodium styrene sulfonate, 40 parts of acrylamide, N,N methylene bis acrylamide 1
Part, oxygen also 0.3 part of initiator (0.15 part of ammonium persulfate, 0.15 part of sodium hydrogensulfite), 60 parts of water.
Prepare sulfonated-pheno-formoldehyde resin first: by 50 parts of water, 160 parts of formaldehyde, 100 parts of phenol, 35 parts of sodium pyrosulfites and
Reaction kettle is added in 42 parts of sodium sulfites, 45min is reacted at 60 DEG C, then temperature rises to 97 DEG C, by the way that 335 parts of water are added portionwise
(containing 50 parts first added, by moisture at 5 batches, every batch of is added 57 parts), the variation of observing response system viscosity, when reaction product viscosity
When increasing to certain degree (liquid level vortex becomes smaller, and tends to plane), 57 parts of water are added, until the viscosity of reaction mixture is obvious again
Water ... next time is added when increase again, is so operated, until water adds, then reacts 1h, cooling discharge obtains mass fraction
For 34% sulfonated-pheno-formoldehyde resin.
The preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid the following steps are included:
(1) autoclave is added in sulfonated-pheno-formoldehyde resin (mass fraction 34%), starts stirring, then according to the ratio
Water, formaldehyde (mass fraction 36%) are successively added into reaction kettle, and pH value is adjusted to 8.0 with diethanol amine, is then added
Melamine, after 65 DEG C of heating water bath 10min, melamine dissolves to form clear solution, is then brought rapidly up to 70 DEG C, hydroxyl first
Then glycosylation reaction 90min is cooled to 20 DEG C, obtain modified sulfonated-pheno-formoldehyde resin；
(2) sodium styrene sulfonate, acrylamide, N, N- methylene are sequentially added in sulfonated-pheno-formoldehyde resin after modification
Bisacrylamide, ammonium persulfate, sodium hydrogensulfite increase temperature to 30 DEG C after mixing evenly, and arrest reaction gelled obtains
Gel-like product；
(3) gained gel-like product is granulated, at 80 DEG C dry, crush after to get.
Embodiment 2
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid is prepared by the raw material of following mass parts: sulfonated-pheno-formoldehyde resin
700 parts, 3 parts of formaldehyde, 6 parts of melamine, 8 parts of sodium styrene sulfonate, N, 40 parts of N- dimethacrylamide, N, N- di-2-ethylhexylphosphine oxide
0.5 part of acrylamide, oxygen also 0.3 part of initiator (0.15 part of ammonium persulfate, 0.15 part of sodium hydrogensulfite), 70 parts of water.
Sulfonated-pheno-formoldehyde resin is prepared first: by 50 parts of water, 156.5 parts of formaldehyde, 100 parts of phenol, 37.25 parts of pyrosulfurous acids
Reaction kettle is added in sodium and 35.5 parts of sodium sulfites, 45min is reacted at 60 DEG C, then temperature rises to 97 DEG C, by being added portionwise
335 parts of water (containing 50 parts first added, by moisture at 5 batches, every batch of is added 57 parts), reaction is worked as in the variation of observing response system viscosity
When product viscosity increases to certain degree (liquid level vortex becomes smaller, and tends to plane), 57 parts of water are added, until reaction mixture is viscous
Degree adds water ... next time when obviously increasing again again, so operates, until water adds, then reacts 1h, cooling discharge obtains
The sulfonated-pheno-formoldehyde resin that mass fraction is 35%.
The preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid the following steps are included:
(1) autoclave is added in sulfonated-pheno-formoldehyde resin (mass fraction 35%), starts stirring, then according to the ratio
Water, formaldehyde (mass fraction 37%) are successively added into reaction kettle, and pH value is adjusted to 8.5 with triethanolamine, is then added
Melamine, after 60 DEG C of heating water bath 15min, melamine dissolves to form clear solution, is then brought rapidly up to 80 DEG C, hydroxyl first
Then glycosylation reaction 60min is cooled to 10 DEG C, obtain modified sulfonated-pheno-formoldehyde resin；
(2) sodium styrene sulfonate, N are sequentially added in sulfonated-pheno-formoldehyde resin after modification, N- dimethacrylamide,
N, N- methylene-bisacrylamide, ammonium persulfate, sodium hydrogensulfite, increase temperature to 50 DEG C after mixing evenly, arrest reaction at
Gel obtains gel-like product；
(3) gained gel-like product is granulated, at 100 DEG C dry, crush after to get.
Embodiment 3
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid is prepared by the raw material of following mass parts: sulfonated-pheno-formoldehyde resin
700 parts, 5 parts of formaldehyde, 8 parts of melamine, 8 parts of sodium styrene sulfonate, N, 40 parts of N- dimethacrylamide, N, N- di-2-ethylhexylphosphine oxide
2 parts of acrylamide, oxygen also 0.6 part of initiator (0.3 part of ammonium persulfate, 0.3 part of potassium bisulfite), 60 parts of water.
Sulfonated-pheno-formoldehyde resin is prepared first: by 50 parts of water, 162 parts of formaldehyde, 100 parts of phenol, 34.5 parts of sodium pyrosulfites
Reaction kettle is added with 47.5 parts of sodium sulfites, 45min is reacted at 60 DEG C, then temperature rises to 97 DEG C, by being added portionwise 335
Part water (containing 50 parts first added, by moisture at 5 batches, every batch of is added 57 parts), reaction product is worked as in the variation of observing response system viscosity
When viscosity increases to certain degree (liquid level vortex becomes smaller, and tends to plane), 57 parts of water are added, until the viscosity of reaction mixture is again
Water ... next time is added when obviously increasing again, is so operated, until water adds, then reacts 1h, cooling discharge obtains quality
The sulfonated-pheno-formoldehyde resin that score is 35%.
The preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid the following steps are included:
(1) autoclave is added in sulfonated-pheno-formoldehyde resin (mass fraction 35%), starts stirring, then according to the ratio
Water, formaldehyde (mass fraction 37%) are successively added into reaction kettle, and pH value is adjusted to 8.5 with triethanolamine, is then added
Melamine, after 65 DEG C of heating water bath 10min, melamine dissolves to form clear solution, is then brought rapidly up to 70 DEG C, hydroxyl first
Then glycosylation reaction 80min is cooled to 15 DEG C, obtain modified sulfonated-pheno-formoldehyde resin；
(2) sodium styrene sulfonate, N are sequentially added in sulfonated-pheno-formoldehyde resin after modification, N- dimethacrylamide,
N, N- methylene-bisacrylamide, ammonium persulfate, potassium bisulfite, increase temperature to 50 DEG C after mixing evenly, arrest reaction at
Gel obtains gel-like product；
(3) gained gel-like product is granulated, at 100 DEG C dry, crush after to get.
Embodiment 4
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid is prepared by the raw material of following mass parts: sulfonated-pheno-formoldehyde resin
700 parts, 8 parts of formaldehyde, 15 parts of melamine, 20 parts of Sulfonates monomer, 40 parts of acrylamide monomers, N, N- di-2-ethylhexylphosphine oxide third
2 parts of acrylamide, 0.6 part of initiator (0.3 part of ammonium persulfate, 0.3 part of potassium bisulfite), 80 parts of water.
Sulfonated-pheno-formoldehyde resin is prepared first: by 50 parts of water, 162 parts of formaldehyde, 100 parts of phenol, 34.5 parts of pyrosulfurous acids
Reaction kettle is added in sodium and 47.5 parts of sodium sulfites, 45min is reacted at 60 DEG C, then temperature rises to 97 DEG C, by being added portionwise
335 parts of water (containing 50 parts first added, by moisture at 5 batches, every batch of is added 57 parts), reaction is worked as in the variation of observing response system viscosity
When product viscosity increases to certain degree (liquid level vortex becomes smaller, and tends to plane), 57 parts of water are added, until reaction mixture is viscous
Degree adds water ... next time when obviously increasing again again, so operates, until water adds, then reacts 1h, cooling discharge obtains
The sulfonated-pheno-formoldehyde resin that mass fraction is 36%.
The preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid the following steps are included:
(1) autoclave is added in sulfonated-pheno-formoldehyde resin (mass fraction 36%), starts stirring, then according to the ratio
Water, formaldehyde (mass fraction 38%) are successively added into reaction kettle, and pH value is adjusted to 8.5 with diethanol amine, is then added
Melamine, after 60 DEG C of heating water bath 15min, melamine dissolves to form clear solution, is then brought rapidly up to 70 DEG C, hydroxyl first
Then glycosylation reaction 60min is cooled to 20 DEG C, obtain modified sulfonated-pheno-formoldehyde resin；
(2) sodium allylsulfonate, N are sequentially added in sulfonated-pheno-formoldehyde resin after modification, N- dimethacrylamide, N,
N- methylene-bisacrylamide, ammonium persulfate, potassium bisulfite, increase temperature to 40 DEG C after mixing evenly, arrest reaction Cheng Ning
Glue obtains gel-like product；
(3) gained gel-like product is granulated, at 120 DEG C dry, crush after to get.
Embodiment 5
A kind of high-temperature resistant water-based filtrate reducer for drilling fluid is prepared by the raw material of following mass parts: sulfonated-pheno-formoldehyde resin
700 parts, 6 parts of formaldehyde, 10 parts of melamine, 8 parts of Sulfonates monomer, 80 parts of acrylamide monomers, N, N- di-2-ethylhexylphosphine oxide third
2 parts of acrylamide, oxygen also 0.3 part of initiator (0.15 part of ammonium persulfate, 0.15 part of potassium bisulfite), 80 parts of water.
Sulfonated-pheno-formoldehyde resin is prepared first: by 50 parts of water, 162 parts of formaldehyde, 100 parts of phenol, 34.5 parts of sodium pyrosulfites
Reaction kettle is added with 47.5 parts of sodium sulfites, 45min is reacted at 60 DEG C, then temperature rises to 97 DEG C, by being added portionwise 335
Part water (containing 50 parts first added, by moisture at 5 batches, every batch of is added 57 parts), reaction product is worked as in the variation of observing response system viscosity
When viscosity increases to certain degree (liquid level vortex becomes smaller, and tends to plane), 57 parts of water are added, until the viscosity of reaction mixture is again
Water ... next time is added when obviously increasing again, is so operated, until water adds, then reacts 1h, cooling discharge obtains quality
The sulfonated-pheno-formoldehyde resin that score is 35%.
The preparation method of the high-temperature resistant water-based filtrate reducer for drilling fluid the following steps are included:
(1) autoclave is added in 700 parts of sulfonated-pheno-formoldehyde resins (mass fraction 35%), starts stirring, then
Water, formaldehyde (mass fraction 37%) is successively added into reaction kettle according to the ratio, and pH value is adjusted to 8.5 with diethanol amine, so
After be added melamine, after 65 DEG C of heating water bath 15min, melamine dissolves to form clear solution, is then brought rapidly up to 80
DEG C, then hydroxymethylation 90min is cooled to 20 DEG C, obtain modified sulfonated-pheno-formoldehyde resin；
(2) sodium allylsulfonate, N are sequentially added in sulfonated-pheno-formoldehyde resin after modification, N- dimethacrylamide, N,
N- methylene-bisacrylamide, ammonium persulfate, potassium bisulfite, increase temperature to 40 DEG C after mixing evenly, arrest reaction Cheng Ning
Glue obtains gel-like product；
(3) gained gel-like product is granulated, at 120 DEG C dry, crush after to get.
Other embodiments are configured (unit is by percentage to the quality) according to the component that table 1 provides.
Table 1
Temperature resistance and filtrate reducing effect assessment to product of the present invention, as a result as follows:
1, the performance evaluation in fresh water-based slurry
The configuration of 4% fresh water-based slurry: being added 400mL water in high-speed stirred cup, is added with stirring 0.48g sodium carbonate, 16g examination
It tests and uses sodium bentonite, height stirs 20min, and sealing is placed for 24 hours.
Experiment slurry configuration: the fluid loss additive sample prepared in embodiment 1~12 is added in 4% fresh water-based slurry, is prepared
The experiment of 0.01g/mL is starched, rolled at 260 DEG C it is cooling after aging 16h take out, by GB/T16783.1 measure its rheological property and
Middle filter pressing loss FLAPI, wherein rheological property includes that apparent viscosity AV, plastic viscosity PV and yield value YP, test result are shown in
Table 2.
After product of the present invention is added in 4% base slurry, the API filtration reduction amplitude measured is bigger, illustrates filtrate reducing
Effect is better, the result shows that, postpartum of the invention is added in 4% base slurry by table 2, through 260 DEG C/16h aging, filter loss by
45.0mL is down within 14mL, minimum to be down to 8.6mL, this illustrates that the fluid loss additive for boring fluid has good drop filter resistant to high temperatures
Failure fruit.
The performance evaluation of the fluid loss additive of the different embodiment preparations of table 2
| Formula | AV/mPa·s | PV/mPa·s | YP/Pa | FLHTHP/mL |
| 400mL4% base slurry | 8.0 | 5.0 | 3.0 | 45.0 |
| 400mL4% base slurry+4.0g sample 1 | 6.5 | 4.5 | 2.0 | 10.2 |
| 400mL4% base slurry+4.0g sample 2 | 5.5 | 4.0 | 1.5 | 8.6 |
| 400mL4% base slurry+4.0g sample 3 | 5.5 | 3.5 | 2.0 | 11.4 |
| 400mL4% base slurry+4.0g sample 4 | 4.0 | 3.0 | 1.0 | 12.4 |
| 400mL4% base slurry+4.0g sample 5 | 4.5 | 2.0 | 2.5 | 13.4 |
| 400mL4% base slurry+4.0g sample 6 | 5.0 | 4.5 | 0.5 | 11.0 |
| 400mL4% base slurry+4.0g sample 7 | 4.0 | 2.5 | 1.5 | 9.2 |
| 400mL4% base slurry+4.0g sample 8 | 4.5 | 2.5 | 2.0 | 13.5 |
| 400mL4% base slurry+4.0g sample 9 | 4.0 | 2.0 | 2.0 | 13.0 |
| 400mL4% base slurry+4.0g sample 10 | 4.0 | 3.5 | 0.5 | 11.0 |
| 400mL4% base slurry+4.0g sample 11 | 3.0 | 2.5 | 0.5 | 10.0 |
| 400mL4% base slurry+4.0g sample 12 | 4.0 | 3.0 | 1.0 | 14.0 |
2, filtrate reducing effect of the various concentration product of the present invention in fresh water-based slurry
Experiment slurry configuration: 4% base slurry is configured according to the method described above, and containing the drilling fluid filtrate reducing prepared in embodiment 2
The concentration of agent sample 2 is respectively the experiment slurry of 0.005g/mL, 0.01g/mL, 0.02g/mL, 0.03g/mL, at 260 DEG C/16h
It rolls and tests its rheological property and fluid loss, operated by the testing standard, the result is shown in tables 3.
Influence of the 3 various concentration fluid loss additive sample of table to 4% fresh water-based slurry performance
| Formula | AV/mPa·s | PV/mPa·s | YP/Pa | FLHTHP/mL |
| 400mL4% base slurry | 8.0 | 5.0 | 3.0 | 45.0 |
| 400mL4% base slurry+2.0g sample | 6.5 | 5.0 | 1.5 | 20.4 |
| 400mL4% base slurry+4.0g sample | 5.5 | 4.0 | 1.5 | 8.6 |
| 400mL4% base slurry+8.0g sample | 5.0 | 4.0 | 1.0 | 9.6 |
| 400mL4% base slurry+12.0g sample | 4.5 | 3.5 | 0.5 | 9.8 |
By table 3 the result shows that, 4% base slurry in, with the increasing of 2 dosage of polymer fluid loss reducing additive for drilling fluid sample
Add, after 260 DEG C/16h aging, filter loss is decreased, when product dosage is more than or equal to 0.01g/mL in 4% base slurry,
With good filtrate reducing effect, when product dosage is 0.01g/mL, filter loss 8.6mL.
Above embodiments explanation, the high temperature resistant drilling fluids fluid loss additive that the preparation method provided through the invention obtains are right
There is good application prospect in deep-well, ultra-deep well drilling process.
Detailed Jie has been carried out to high-temperature resistant water-based filtrate reducer for drilling fluid provided by the present invention and preparation method thereof above
It continues.Used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only
It is to be used to help understand method and its core concept of the invention.It should be pointed out that for those skilled in the art
For, it without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention, these improve and repair
Decorations are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of high-temperature resistant water-based filtrate reducer for drilling fluid, which is characterized in that the fluid loss agents are prepared by the raw material of following mass parts
It obtains: 700 parts of sulfonated-pheno-formoldehyde resin, 3~8 parts of formaldehyde, 6~15 parts of melamine, 8~20 parts of Sulfonates monomer, propylene
40~80 parts of amides monomer, 0.5~2 part of crosslinking agent, 0.3~0.6 part of initiator, 60~80 parts of water.
2. high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 1, which is characterized in that the Sulfonates monomer
For at least one in sodium allylsulfonate, sodium styrene sulfonate, sodium vinyl sulfonate, 2- acrylamide -2- methylpropene sodium sulfonate
Kind.
3. high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 1, which is characterized in that the acrylic amide list
Body is acrylamide, N, N- dimethacrylamide, N, at least one of N- acrylamide.
4. high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 1, which is characterized in that the crosslinking agent is N, N-
Methylene-bisacrylamide.
5. high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 1, which is characterized in that the initiator is oxygen
Change-reduction initiator, wherein the mass ratio of oxidant and reducing agent is 1:1, and oxidant is potassium peroxydisulfate or ammonium persulfate, reduction
Agent is sodium hydrogensulfite or sodium sulfite.
6. high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 1, which is characterized in that sulfonated-pheno-formoldehyde resin
Mass fraction is 34~36%, and the mass fraction of formaldehyde is 36~38%.
7. the preparation method of high-temperature resistant water-based filtrate reducer for drilling fluid described in claim 1, which is characterized in that this method includes
Following steps:
(1) after mixing sulfonated-pheno-formoldehyde resin with formaldehyde, the pH value of solution is adjusted to 8.0-8.5, melamine is then added
Reaction, obtains modified sulfonated-pheno-formoldehyde resin；
(2) by modified sulfonated-pheno-formoldehyde resin, Sulfonates monomer, acrylamide monomers, N, N- methylene bisacrylamide
Amide, initiator are warming up to 30~50 DEG C of reactions after mixing evenly, obtain gel-like product；
(3) after being granulated, dry by gained gel-like product, crushing, the high-temperature resistant water-based filtrate reducer for drilling fluid is obtained.
8. the preparation method of high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 7, which is characterized in that step
(1) in, sulfonated-pheno-formoldehyde resin is added in autoclave, stirring is started, is then successively added according to the ratio into reaction kettle
Melamine is added after adjusting pH value in water, formaldehyde, after 60~65 DEG C of 10~15min of heating water bath, is brought rapidly up to 70~80
DEG C, then 60~90min of hydroxymethylation is cooled to 10~20 DEG C.
9. the preparation method of high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 7, which is characterized in that step
(1) in, the reagent for adjusting solution ph is at least one of diethanol amine, triethanolamine.
10. the preparation method of high-temperature resistant water-based filtrate reducer for drilling fluid according to claim 7, which is characterized in that step
(3) in, the temperature of drying is 80~120 DEG C.
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| CN114106257A (en) * | 2021-12-30 | 2022-03-01 | 石家庄华莱鼎盛科技有限公司 | Anti-collapse dilution filtrate reducer modified multi-element resin for drilling fluid |
| US11286411B2 (en) * | 2020-07-15 | 2022-03-29 | Beijing Shida Bocheng Technology Co., Ltd | Synergist for water-based drilling fluid and preparation method therefor, water-based drilling fluid and application thereof |
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Application publication date: 20190212 |