CN104327808A - Oil-based drilling fluid filtrate reducer and preparation method thereof - Google Patents

Oil-based drilling fluid filtrate reducer and preparation method thereof Download PDF

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CN104327808A
CN104327808A CN201410577838.7A CN201410577838A CN104327808A CN 104327808 A CN104327808 A CN 104327808A CN 201410577838 A CN201410577838 A CN 201410577838A CN 104327808 A CN104327808 A CN 104327808A
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oil
drilling fluid
base drilling
loss additive
fluid loss
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解洪祥
左凤江
王绪美
刘艳
薛丽
刘学玲
贾东民
赵福祥
贾立军
刘彦妹
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CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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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
    • C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F120/00—Homopolymers 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
    • C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F120/10—Esters
    • C08F120/12—Esters of monohydric alcohols or phenols
    • C08F120/14—Methyl esters, e.g. methyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/12—Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C—CHEMISTRY; METALLURGY
    • 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
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1803—C3-(meth)acrylate, e.g. (iso)propyl (meth)acrylate

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Abstract

The invention discloses an oil-based drilling fluid filtrate reducer. The oil-based drilling fluid filtrate reducer is prepared from the following components in percentage by weight: 3%-50% of oil-soluble monomer, 0-5% of surfactant, 0-5% of crosslinking agent, 0.005%-2% of radical initiator and the balance of water. The invention also provides a preparation method of the oil-based drilling fluid filtrate reducer. The oil-based drilling fluid filtrate reducer is capable of realizing a relatively high filtrate reduction rate on the basis of not remarkably affecting the rheological property of the oil-based drilling fluid; and besides, the oil-based drilling fluid filtrate reducer also has strong high temperature resistance and is still capable of keeping excellent filtrate reduction capability at 200 DEG C.

Description

Fluid loss additive of oil-base drilling fluid and preparation method thereof
Technical field:
The present invention relates to field of oil drilling, particularly relate to a kind of fluid loss additive of oil-base drilling fluid and preparation method thereof.
Background technology:
Oil base drilling fluid has the advantages such as stabilizing borehole, lubricate and sticking control, the expansion of suppression Shale Hydration and stratum pulping, has become the important means of boring the highly difficult various Holes of Complicated Wells such as high temperature deep well, offshore drilling, high-inclination directional well, horizontal well, huge thick saline bed.Along with the exploitation of unconventional petroleum resources, the application of oil base drilling fluid system will be more and more extensive.
Fluid loss agent is as one of the core processing agent of oil base drilling fluid, have a direct impact the leak-off of oil base drilling fluid system and building capacity, the fluid loss agent of excellent property can ensure that oil base drilling fluid has low leak-off and can form thin and tough mud cake, reduce drilling fluid consumption, reduce down-hole accident; In addition, the emulsifying stability of drilling fluid system can also be improved to a certain extent.The fluid loss additive of oil-base drilling fluid kind used both at home and abroad is at present very limited, mostly be oxidized bitumen series products and organic amine modified humic acid series products, oil base fluid loss agent product disclosed in patent documentation US4941983, CN201210346679.0, CN200910063480.5 and CN201110450281.7, oil base fluid loss agent product disclosed in its Patent Literature CN201210346679.0 is the mixing prod of rubber powder and pitch.The present invention aims to provide and is a kind ofly different from oxidized bitumen and modified humic acid class and the fluid loss additive of oil-base drilling fluid of excellent performance.
Summary of the invention:
An object of the present invention is to provide a kind of fluid loss additive of oil-base drilling fluid, there is good filtrate reducing effect and stronger high-temperature resistance, simultaneously less on the rheological property impact of oil base drilling fluid.
Another object of the present invention is to provide a kind of preparation method of fluid loss additive of oil-base drilling fluid.
For this reason, technical scheme of the present invention is as follows:
Described fluid loss additive of oil-base drilling fluid is prepared from by the component of following massfraction:
Concrete preparation method is as follows:
(1) by oil-soluble monomer, tensio-active agent, linking agent and water mixing post-heating to 30 ~ 90 DEG C, afterwards nitrogen protection and be not less than 300rpm stirring under add radical initiator;
(2) maintain the temperature after heating, under the stirring being not less than 300rpm, continue reaction 1 ~ 12h, namely obtain described fluid loss additive of oil-base drilling fluid product.
For the ease of using, pulverizing with pulverizer again after product can being dried, crossing 100 mesh sieves, obtain pressed powder finished product.
In technique scheme, described oil-soluble monomer comprises: methyl acrylate, ethyl propenoate, propyl acrylate, butyl acrylate, isopropyl acrylate, ethyl acrylate, methyl methacrylate, β-dimethyl-aminoethylmethacrylate, propyl methacrylate, butyl methacrylate, isopropyl methacrylate, methacrylic acid-2-ethylhexyl, vinylbenzene, 4-vinyl toluene, 4-methoxy styrene, 3, 4-dimethoxy styrene, 2-methyl styrene, alpha-methyl styrene, 4-ethyl styrene, 4-n-octyl ethene, 4-trifluoromethyl styrene, to chloro-styrene, pfluorostyrene.Because reaction involved in above-mentioned preparation method's step (1) belongs to Raolical polymerizable, above-mentioned monomer belongs to the conventional monomer of polyreaction, all contain the ethylene linkage participating in this Raolical polymerizable, although the speed of reaction between each monomer is different with reactivity ratio, but finally can obtain the product with the technology of the present invention effect, therefore described oil-soluble monomer can be the above any one or multiple with the mixture of arbitrary proportion composition.
Described tensio-active agent is optional in reactive component, but add a small amount of tensio-active agent can the stability of intensified response system.Tensio-active agent can be one or more mixtures formed with arbitrary proportion in anion surfactant, cats product, nonionogenic tenside.
Wherein, described anion surfactant is the compound with following general structure: (R-X) Y, and in formula, R is C 8~ C 20saturated or undersaturated straight or branched alkyl; X is C 6h 4sO 3 -,-O-SO 3 -, SO 3 -or CO 2 -; Y is H +or alkali metal cation, as: Sodium dodecylbenzene sulfonate, sodium cetanesulfonate, sodium stearyl sulfonate, sodium lauryl sulphate, oleic acid etc.
Described cats product is C 8~ C 20saturated or unsaturated straight or branched alkyl replace quaternary ammonium salt, as Dodecyl trimethyl ammonium chloride, Trimethyllaurylammonium bromide, cetyl trimethylammonium bromide etc.
Described nonionogenic tenside is C 8~ C 20saturated or unsaturated alkyl polyoxyethylenated alcohol, C 8~ C 20saturated or unsaturated alkyl phenol polyethenoxy ether, Span series non-ionic surfactants or Tween series non-ionic surfactants; As OP-7, OP-10, Span-20, Span-40, Span-60, Span-80, Tween60, Tween80 etc.
Described linking agent neither be required in reactive component, and its Main Function is the softening temperature regulating product, can change addition according to the needs of product performance.Described linking agent is: N, N ' any one in-methylene-bisacrylamide, Ethylene glycol dimethacrylate, ethylene glycol diacrylate, two acryloyl quadrols, N, N-dimethyl allene acyl quadrol or Vinylstyrene.
Described radical initiator is: Diisopropyl azodicarboxylate, Diisopropyl azodicarboxylate amidine hydrochloride, dibenzoyl peroxide, Na 2s 2o 8, K 2s 2o 8, (NH 4) 2s 2o 8, also can be the initiator system of following Oxidizing and Reducing Agents composition: Na 2s 2o 8/ NaHSO 3, K 2s 2o 8/ NaHSO 3, (NH 4) 2s 2o 8/ NaHSO 3, Na 2s 2o 8/ FeSO 4, K 2s 2o 8/ FeSO 4, (NH 4) 2s 2o 8/ FeSO 4, Na 2s 2o 8/ Na 2s 2o 3, K 2s 2o 8/ Na 2s 2o 3, (NH 4) 2s 2o 8/ Na 2s 2o 3, Na 2s 2o 8/ Na 2sO 3, K 2s 2o 8/ Na 2sO 3, (NH 4) 2s 2o 8/ Na 2sO 3.In above-mentioned Redox initiator systems, the mass ratio of oxygenant/reductive agent is 1:1 ~ 1:2.
The fluid loss additive of oil-base drilling fluid obtained by technical solution of the present invention has excellent filtrate reducing effect, can realize higher leak-off reduced rate on the basis of not remarkably influenced rheological property of oil base drilling fluid; In addition, this fluid loss additive of oil-base drilling fluid also has stronger high temperature resistant property, still keeps good filtrate reducing ability at 200 DEG C.
Accompanying drawing illustrates:
Fig. 1 is the stereoscan photograph of embodiment 1 product.
Embodiment:
Embodiment 1
(1) in 500mL tetra-mouthfuls of round-bottomed flasks, add 100mL water, 30g methyl methacrylate and 1g cats product cetyl trimethylammonium bromide, be heated to 80 DEG C, under nitrogen protection, 300rpm agitation condition, add 0.15g Diisopropyl azodicarboxylate amidine hydrochloride;
(2) maintain 80 DEG C, under 300rpm stirs, continue reaction 4h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 2
(1) in 500mL tetra-mouthfuls of round-bottomed flasks, add 100mL water and 5g methyl acrylate, be heated to 60 DEG C, under nitrogen protection, 400rpm agitation condition, add 0.1g K 2s 2o 8;
(2) maintain 60 DEG C, under 400rpm stirs, continue reaction 4h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 3
(1) in 500mL tetra-mouthfuls of round-bottomed flasks; add 100mL water, 30g methyl methacrylate, 20g β-dimethyl-aminoethylmethacrylate and 1g anionic; be heated to 40 DEG C, under nitrogen protection, 600rpm agitation condition, add 0.08gK 2s 2o 8and 0.1gNaHSO 3redox initiation body agent system;
(2) maintain 40 DEG C, under 600rpm stirs, continue reaction 4h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 4
(1) in 500mL tetra-mouthfuls of round-bottomed flasks; add 100mL water, 20g propyl acrylate, 20g isopropyl acrylate, 20g propyl methacrylate, 20g butyl methacrylate, 0.1gN; N '-methylene-bisacrylamide and 2g non-ionic surfactant OP-10; be heated to 80 DEG C, under nitrogen protection, 800rpm agitation condition, add 0.1g K 2s 2o 8;
(2) maintain 80 DEG C, under 800rpm stirs, continue reaction 6h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 5
(1) in 500mL tetra-mouthfuls of round-bottomed flasks, add 100mL water, 10g vinylbenzene, 20g4-vinyl toluene, 20g4-ethyl styrene, be heated to 90 DEG C, under nitrogen protection, 1000rpm agitation condition, add 0.05g (NH 4) 2s 2o 8with 0.1g Na 2s 2o 3redox initiation body agent system;
(2) maintain 90 DEG C, under 1000rpm stirs, continue reaction 5h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 6
(1) in 500mL tetra-mouthfuls of round-bottomed flasks, add 100mL water, 40g vinylbenzene, 10g methyl methacrylate, 0.5g Vinylstyrene, 0.5g non-ionic surfactant OP-10 and 0.5g anionic, be heated to 80 DEG C, under nitrogen protection, 1200rpm agitation condition, add 0.1g Diisopropyl azodicarboxylate;
(2) maintain 80 DEG C, under 1200rpm stirs, continue reaction 6h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Embodiment 7
(1) in 500mL tetra-mouthfuls of round-bottomed flasks, add 100mL water, 20g methyl methacrylate, 20g vinylbenzene and 20g4-vinyl toluene, be heated to 80 DEG C, under nitrogen protection, 700rpm agitation condition, add 0.5gK 2s 2o 8;
(2) maintain 80 DEG C, under 700rpm stirs, continue reaction 12h, namely obtain described fluid loss additive of oil-base drilling fluid product;
(3) product is dried by electricity consumption heat blowing baking oven, then is pulverized by solid pulverizer, crosses 100 mesh sieves, obtains fluid loss additive of oil-base drilling fluid finished product.
Performance test:
(1) scanning electron microscopic observation: carry out scanning electron microscopic observation to the fluid loss additive of oil-base drilling fluid pressed powder finished product obtained by embodiment 1, as shown in Figure 1, pressed powder presents globosity under mirror, and median size is 730nm.
(2) performance evaluation: prepare drilling fluid system according to the following formulation: drilling fluid composition: 360mL5 white oil+10g organophilic clay+10g primary emulsion (polyisobutene succinimide)+5g auxiliary emulsifying agent (stearate)+10g fluid loss additive of oil-base drilling fluid+10gCaO+40mLCaCl 2(20% aqueous solution)+673g weighting agent (ground barium sulfate), the density of drilling fluid is 1.90g/cm 3.To apparent viscosity (AV), plastic viscosity (PV), yield value (YP), High Temperature High Pressure filtrate reducing amount (the HTHP FL of drilling fluid system, in 200 DEG C, measure under 3.5MPa) and emulsion-breaking voltage (ES) measure, and to compare with blank system (not adding the above-mentioned drilling fluid system of fluid loss additive of oil-base drilling fluid).The results are shown in Table 1.
Table 1 testing performance of drilling fluid comparative result
Note: embodiment 1 ~ 7 is the corresponding drilling fluid system that with the addition of each embodiment product respectively
Data as can be seen from table 1: after adding fluid loss agent product obtained in embodiment, compared with blank system, the apparent viscosity (AV) of drilling fluid, plastic viscosity (PV), yield value (YP), without noticeable change, show that the rheology impact of fluid loss agent of the present invention to oil base drilling fluid is less; In filtrate reducing ability, the filter loss that with the addition of the drilling fluid of each embodiment product all obviously reduces, and reduced rate is greater than 55%, illustrates that the fluid loss additive of oil-base drilling fluid obtained by the present invention has good filtrate loss controllability.In addition, with the addition of the drilling fluid of each embodiment product after 200 DEG C of burin-in process 16h, emulsion-breaking voltage is all greater than 400v, system stability and rheological good, show that this fluid loss agent still keeps stable performance under 200 DEG C of high temperature, there is good high temperature resistant property.

Claims (10)

1. a fluid loss additive of oil-base drilling fluid, is characterized in that: be made up of the component of following massfraction:
2. fluid loss additive of oil-base drilling fluid according to claim 1, it is characterized in that: described oil-soluble monomer is methyl acrylate, ethyl propenoate, propyl acrylate, butyl acrylate, isopropyl acrylate, ethyl acrylate, methyl methacrylate, β-dimethyl-aminoethylmethacrylate, propyl methacrylate, butyl methacrylate, isopropyl methacrylate, methacrylic acid-2-ethylhexyl, vinylbenzene, 4-vinyl toluene, 4-methoxy styrene, 3, 4-dimethoxy styrene, 2-methyl styrene, alpha-methyl styrene, 4-ethyl styrene, 4-n-octyl ethene, 4-trifluoromethyl styrene, to chloro-styrene, in pfluorostyrene any one or multiple with arbitrary proportion composition mixture.
3. fluid loss additive of oil-base drilling fluid according to claim 1, is characterized in that: described tensio-active agent be in anion surfactant, cats product or nonionogenic tenside any one or multiple with arbitrary proportion composition mixture.
4. fluid loss additive of oil-base drilling fluid according to claim 3, is characterized in that: described anion surfactant is the compound with following general structure: (R-X) Y, and in formula, R is C 8~ C 20saturated or undersaturated straight or branched alkyl; X is C 6h 4sO 3 -,-O-SO 3 -, SO 3 -or CO 2 -; Y is H +or alkali metal cation.
5. fluid loss additive of oil-base drilling fluid according to claim 3, is characterized in that: described cats product is C 8~ C 20saturated or unsaturated straight or branched alkyl replace quaternary ammonium salt.
6. fluid loss additive of oil-base drilling fluid according to claim 3, is characterized in that: described nonionogenic tenside is C 8~ C 20saturated or unsaturated alkyl polyoxyethylenated alcohol, C 8~ C 20saturated or unsaturated alkyl phenol polyethenoxy ether, Span series non-ionic surfactants or Tween series non-ionic surfactants.
7. fluid loss additive of oil-base drilling fluid according to claim 1, it is characterized in that: described linking agent is N, N '-methylene-bisacrylamide, Ethylene glycol dimethacrylate, ethylene glycol diacrylate, two acryloyl quadrols, N, N-dimethyl allene acyl quadrol or Vinylstyrene.
8. fluid loss additive of oil-base drilling fluid according to claim 1, is characterized in that: described radical initiator is Diisopropyl azodicarboxylate, Diisopropyl azodicarboxylate amidine hydrochloride, dibenzoyl peroxide, Na 2s 2o 8, K 2s 2o 8, (NH 4) 2s 2o 8, or any one in following oxidation/reduction initiator system: Na 2s 2o 8/ NaHSO 3, K 2s 2o 8/ NaHSO 3, (NH 4) 2s 2o 8/ NaHSO 3, Na 2s 2o 8/ FeSO 4, K 2s 2o 8/ FeSO 4, (NH 4) 2s 2o 8/ FeSO 4, Na 2s 2o 8/ Na 2s 2o 3, K 2s 2o 8/ Na 2s 2o 3, (NH 4) 2s 2o 8/ Na 2s 2o 3, Na 2s 2o 8/ Na 2sO 3, K 2s 2o 8/ Na 2sO 3, (NH 4) 2s 2o 8/ Na 2sO 3, in described oxidation/reduction initiator system, the mass ratio of oxygenant and reductive agent is 1:1 ~ 1:2.
9. a preparation method for fluid loss additive of oil-base drilling fluid described in claim 1, is characterized in that comprising the following steps:
(1) by described oil-soluble monomer, tensio-active agent, linking agent and water mixing post-heating to 30 ~ 90 DEG C, afterwards nitrogen protection and be not less than 300rpm stirring under add described radical initiator;
(2) maintain the temperature after heating, under the stirring being not less than 300rpm, continue reaction 1 ~ 12h, namely obtain described fluid loss additive of oil-base drilling fluid product.
10. method according to claim 9, is characterized in that: also comprise following subsequent process steps: dried by described fluid loss additive of oil-base drilling fluid product, pulverize, cross 100 mesh sieves, obtain pressed powder finished product.
CN201410577838.7A 2014-10-24 2014-10-24 Oil-based drilling fluid filtrate reducer and preparation method thereof Pending CN104327808A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104650828A (en) * 2015-02-11 2015-05-27 中国石油大学(北京) Wettability reversal agent, preparation method of wettability reversal agent, reservoir protection agent composition, drilling fluid for low-permeability and ultra-low permeability reservoir and application of drilling fluid
CN107987815A (en) * 2017-11-21 2018-05-04 中国石油集团西部钻探工程有限公司 Sealing agent for oil base drilling fluid and preparation method thereof
CN109097005A (en) * 2018-08-09 2018-12-28 李志平 A kind of oil-based drilling fluid emulsifying agent
CN110982497A (en) * 2016-11-07 2020-04-10 天津天诚拓源科技发展有限公司 Preparation method of high-temperature-resistant filtrate reducer for oil-based drilling fluid
CN111269701A (en) * 2020-02-05 2020-06-12 古莱特科技股份有限公司 High-density ultra-low-viscosity oil-based drilling fluid and preparation method and application thereof
CN112111033A (en) * 2019-06-21 2020-12-22 中国石油天然气集团有限公司 Carbon dioxide viscosity-increasing and fluid loss-reducing copolymer and preparation method and application thereof
CN113956391A (en) * 2021-11-02 2022-01-21 中海石油(中国)有限公司湛江分公司 Polymer filtrate reducer and preparation method and application thereof
CN115403785A (en) * 2021-05-28 2022-11-29 中石化石油工程技术服务有限公司 Humic acid filtrate reducer and preparation method and application thereof

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CN101591527A (en) * 2009-07-08 2009-12-02 中国石油大学(华东) A kind of high temperature resistant anti-sloughing filtrate reducer for drilling fluid and preparation method thereof
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CN104650828B (en) * 2015-02-11 2016-02-10 中国石油大学(北京) Reverse wetting agent and preparation method thereof and container horizon protective agent composition and for the drilling fluid of hyposmosis ultra-low permeability reservoir and application
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CN109097005A (en) * 2018-08-09 2018-12-28 李志平 A kind of oil-based drilling fluid emulsifying agent
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