CN101845295A - Drilling fluid tackifier favorable for protecting oil-gas layers - Google Patents
Drilling fluid tackifier favorable for protecting oil-gas layers Download PDFInfo
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- CN101845295A CN101845295A CN201010184837A CN201010184837A CN101845295A CN 101845295 A CN101845295 A CN 101845295A CN 201010184837 A CN201010184837 A CN 201010184837A CN 201010184837 A CN201010184837 A CN 201010184837A CN 101845295 A CN101845295 A CN 101845295A
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- drilling fluid
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- tetrapolymer
- viscosifier
- acrylamide
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- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 239000012530 fluid Substances 0.000 title claims abstract description 46
- 230000002349 favourable effect Effects 0.000 title 1
- 239000000178 monomer Substances 0.000 claims abstract description 25
- 229920006029 tetra-polymer Polymers 0.000 claims abstract description 18
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims abstract description 10
- 230000009286 beneficial effect Effects 0.000 claims abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 150000003863 ammonium salts Chemical group 0.000 claims abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims description 28
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 6
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 6
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims description 6
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 5
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 5
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 5
- XQPVIMDDIXCFFS-UHFFFAOYSA-N n-dodecylprop-2-enamide Chemical compound CCCCCCCCCCCCNC(=O)C=C XQPVIMDDIXCFFS-UHFFFAOYSA-N 0.000 claims description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 5
- MPLIJWMZXSTSDQ-UHFFFAOYSA-N 2-(prop-2-enoylamino)dodecane-1-sulfonic acid Chemical compound CCCCCCCCCCC(CS(O)(=O)=O)NC(=O)C=C MPLIJWMZXSTSDQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000001530 fumaric acid Substances 0.000 claims description 4
- 239000003999 initiator Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- BKWMQCLROIZNLX-UHFFFAOYSA-N n-hexadecylprop-2-enamide Chemical compound CCCCCCCCCCCCCCCCNC(=O)C=C BKWMQCLROIZNLX-UHFFFAOYSA-N 0.000 claims description 4
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 2
- 150000001408 amides Chemical class 0.000 claims 2
- ZHIIUGIVMJPBFB-UHFFFAOYSA-N azane;ethene Chemical compound N.N.C=C ZHIIUGIVMJPBFB-UHFFFAOYSA-N 0.000 claims 2
- MAPPEXXSZIMIBC-UHFFFAOYSA-N azane;prop-1-ene Chemical compound N.N.CC=C MAPPEXXSZIMIBC-UHFFFAOYSA-N 0.000 claims 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 claims 2
- 239000011976 maleic acid Substances 0.000 claims 2
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 claims 2
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 claims 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims 2
- 238000006116 polymerization reaction Methods 0.000 claims 2
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 claims 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N Amide-Hexadecanoic acid Natural products CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 150000003842 bromide salts Chemical class 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 239000003623 enhancer Substances 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 230000000379 polymerizing effect Effects 0.000 claims 1
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 235000010265 sodium sulphite Nutrition 0.000 claims 1
- VQIDGTFLGAAJGI-UHFFFAOYSA-M sodium;prop-1-ene-1-sulfonate Chemical compound [Na+].CC=CS([O-])(=O)=O VQIDGTFLGAAJGI-UHFFFAOYSA-M 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 5
- 239000003129 oil well Substances 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 229920003169 water-soluble polymer Polymers 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 239000000693 micelle Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 125000001165 hydrophobic group Chemical group 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- -1 amine salt Chemical class 0.000 description 9
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- 229930195733 hydrocarbon Natural products 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 239000003292 glue Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- 229920002554 vinyl polymer Polymers 0.000 description 6
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 239000004159 Potassium persulphate Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 235000019394 potassium persulphate Nutrition 0.000 description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- XSEKDPDUVUFJBL-UHFFFAOYSA-N azane propane Chemical class N.N.CCC XSEKDPDUVUFJBL-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241000361919 Metaphire sieboldi Species 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
本发明涉及一种有利于保护油气层的钻井液增粘剂，属油田钻井液添加剂技术领域。它由5～95份的四元共聚物和95～5份的双季胺盐混配而成，所述的四元共聚物由三种烯类单体和一种疏水单体复配而成。该钻井液增粘剂为低分子量聚合物，在水溶液中通过分子缔合形成蚯蚓状或长圆棒状的胶束溶液；当胶束浓度超过临界值时，分子间形成空间网架结构，具有较强的悬浮能力，当遇到油气时会自动破胶，不需要化学破胶剂就可解除钻井液对油层的污染。解决了现有钻井液水溶性高分子增粘剂不能彻底破胶的问题。本发明与常规钻井液增粘剂相比，除含有亲水基团外，还含有长碳链的疏水基团，可降低钻井液的表面张力，有效地预防水锁，提高油井产能。The invention relates to a drilling fluid viscosifier beneficial for protecting oil and gas layers, and belongs to the technical field of oilfield drilling fluid additives. It is formed by mixing 5-95 parts of tetrapolymer and 95-5 parts of bisquaternary ammonium salt. The tetrapolymer is compounded by three kinds of ethylenic monomers and one kind of hydrophobic monomer. . The drilling fluid viscosifier is a low-molecular-weight polymer, which forms earthworm-shaped or oblong rod-shaped micelle solution through molecular association in aqueous solution; when the micelle concentration exceeds the critical value, a space network structure is formed between the molecules, which has a strong Excellent suspension ability, when encountering oil and gas, it will automatically break the gel, and the pollution of the drilling fluid to the oil layer can be removed without chemical gel breakers. It solves the problem that the existing drilling fluid water-soluble polymer viscosifier cannot completely break the gel. Compared with conventional drilling fluid viscosifiers, the present invention contains not only hydrophilic groups but also long carbon chain hydrophobic groups, which can reduce the surface tension of drilling fluids, effectively prevent water lock and increase oil well productivity.
Description
Technical field:
The present invention relates to a kind of drilling fluid tackifier that helps protecting hydrocarbon zone, belong to oil field drilling fluids additive technology field.
Background technology:
Conventional at present water-base drilling fluid adopts water-soluble polymer usually, and is formulated as tackifier as hydro-polyacrylamide, carboxymethyl cellulose, modification guanidine glue etc.There is the problem that can not thoroughly break glue in these water-base drilling fluids in the completion later stage, and in a single day polymer is squeezed into the stratum and very easily is adsorbed, is trapped in the hole, causes oily stream to be obstructed, and cause oil well productivity to descend.At this problem, at present conventional solution is to adopt chemical gel breaker thoroughly to break glue, is in a single day adsorbed, is trapped in the hole by the stratum to prevent the water-soluble polymer in the water base drilling fluid, causes the be obstructed generation of situation of oily stream.But its drawback of this solution is chemical gel breaker is generally oxygenant, all has unsafe factor in transportation and the use, can't satisfy the requirement of engineering of drilling safety operation.
Summary of the invention:
The objective of the invention is to: provide a kind of by tetrapolymer with diquaternary amine salt is composite forms; in the aqueous solution, form micellar solution; when micellar concentration surpasses threshold value; intermolecular formation space grid structure; thereby soltion viscosity is increased considerably, and have stronger suspending power, run into oil gas and can break glue automatically; protect hydrocarbon zone to greatest extent, improve oil well productivity.Thoroughly solve the drilling fluid tackifier that helps protecting hydrocarbon zone that existing drilling liquid water soluble macromolecular tackifier can not thoroughly break the glue problem.
The present invention realizes above-mentioned purpose by following technical solution:
A kind of drilling fluid tackifier that helps protecting hydrocarbon zone, it is characterized in that: it is made of following components in part by weight:
5～95 parts of tetrapolymers
95～5 parts of diquaternary amine salt;
Described tetrapolymer is polymerized by three kinds of vinyl monomers and a kind of hydrophobic monomer, and the quality proportioning of three kinds of vinyl monomers and a kind of hydrophobic monomer is: 20～30: 30～20: 47～45: 3～5;
Described three kinds of vinyl monomers are any three kinds in acrylamide, vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, sodium p styrene sulfonate, N,N-DMAA, sodium allylsulfonate, methylene-succinic acid, the fumaric acid;
Described hydrophobic monomer is any one in 2-acrylamido dodecane sulfonic acid, N-dodecyl acrylamide, N-hexadecyl acrylamide, the single toxilic acid hexadecyl of N-acid amides, the single toxilic acid octadecyl of the N-acid amides;
Described diquaternary amine salt is: N, N '-two (tetradecyl dimethyl)-1,3-dibrominated propane-diammonium salt, N, N '-two (hexadecyldimethyl benzyl ammonium)-1,2-dibrominated second di-ammonium salts, N, N '-two (dodecyl dimethyl)-1,2-dibrominated second di-ammonium salts, N, N '-two (dodecyl dimethyl)-1,3-dibrominated propane-diammonium salt, N, N '-two (hexadecyldimethyl benzyl ammonium)-1, any one in the 3-dibrominated propane-diammonium salt.
Above-mentioned help protecting the preparation method of the drilling fluid tackifier of hydrocarbon zone to be:
(1), produce tetrapolymer:
Getting 300 ml deionized water pours in the clean wide-necked bottle, add 5 gram sodium hydroxide, stirring is dissolved sodium hydroxide fully, be 20～30: 30～20 according to mass ratio successively then: 47～45: 3～5 proportioning is got acrylamide, vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, sodium p styrene sulfonate, N, the N-DMAA, sodium allylsulfonate, methylene-succinic acid, any three kinds of raw materials and 2-acrylamido dodecane sulfonic acid in the fumaric acid, N-dodecyl acrylamide, N-hexadecyl acrylamide, the single toxilic acid hexadecyl of N-acid amides, any one raw material in the single toxilic acid octadecyl of the N-acid amides, making four kinds of total quality of monomer is 100 grams, join in the wide-necked bottle, stir, four kinds of monomers are dissolved fully till.Regulate the pH value of mixed solution 4～6 with 10% sodium hydroxide solution again, logical at ambient temperature nitrogen is after 30 minutes, Potassium Persulphate and 0.2～0.4 gram S-WAT with 0.4～0.8 gram carry out polyreaction as initiator, after the question response time reaches 6 hours, polyreaction is finished, generate low-molecular weight polymer, spray-dried then, pulverize, cross 40 mesh sieves and promptly get tetrapolymer, standby;
(2), produce drilling fluid tackifier:
Tetrapolymer is mixed by said ratio and diquaternary amine salt, pulverize the back and cross 40 mesh sieves, be drilling fluid tackifier product of the present invention.
The present invention's beneficial effect compared with prior art is:
1, this product is low-molecular weight polymer by the polymkeric substance of extraordinary vinyl monomer with diquaternary amine salt is composite forms, and forms micellar solution by molecular association in the aqueous solution, plays tackify and proposes the effect of cutting, and its micella mainly is earthworm shape or oval bar-shaped; Because the hydrophobic association effect, when micellar concentration surpasses threshold value, intermolecular formation space grid structure, thus soltion viscosity is increased considerably and have certain elasticity and stronger suspending power, satisfying the requirement of engineering of drilling operation,
2, running into oil gas when going into operation can break glue automatically, does not need chemical gel breaker, just can remove the pollution of drilling fluid to oil reservoir.The clay and the high-molecular weight polymer that adopt this drilling fluid tackifier to substitute in the conventional drilling liquid make up drilling fluid system, help protecting hydrocarbon zone.
3, drilling fluid tackifier of the present invention is compared with conventional drilling liquid tackifier, except that containing hydrophilic radical, also contains the hydrophobic grouping of long carbochain, can reduce the surface tension of drilling fluid, effectively prevents the water lock, improves oil well productivity.
Embodiment:
Below in conjunction with specific embodiment the present invention is further described.
Embodiment 1:
Vinyl monomer is got vinylformic acid, sodium p styrene sulfonate, 2-acrylamido-2-methyl propane sulfonic acid; Hydrophobic monomer is got the single toxilic acid hexadecyl of N-acid amides; Diquaternary amine salt is got N, N '-two (hexadecyldimethyl benzyl ammonium)-1,3-dibrominated propane-diammonium salt.
(1), produce tetrapolymer:
In the reaction vessel of cleaning, add an amount of 300 milliliters deionized water successively, 5 gram sodium hydroxide stir, get vinylformic acid 28 grams successively, sodium p styrene sulfonate 22 grams, 2-acrylamido-2-methyl propane sulfonic acid 47 grams, the single toxilic acid hexadecyl of N-acid amides 3 grams, join in the wide-necked bottle, stir, till monomer is dissolved fully, regulate the pH value of above-mentioned mixed solution 4 with 10% sodium hydroxide solution again, logical at ambient temperature nitrogen is after 30 minutes, carry out polyreaction with 0.4 gram Potassium Persulphate and 0.2 gram S-WAT as initiator, behind the confined reaction 6 hours, generate low-molecular weight polymer, spray-dried then, pulverize, cross 40 mesh sieves and promptly get tetrapolymer, standby;
(2), produce drilling fluid tackifier:
Get 50 parts of weight parts of synthetic tetrapolymer and N, N '-two (hexadecyldimethyl benzyl ammonium)-1,50 parts of weight parts of 3-dibrominated propane-diammonium salt mix, and pulverize the back and cross 40 mesh sieves, promptly make drilling fluid tackifier product of the present invention.
Embodiment 2:
Vinyl monomer is got acrylamide, N,N-DMAA, sodium allylsulfonate; Hydrophobic monomer is got N-dodecyl acrylamide; Diquaternary amine salt is got N, N '-two (dodecyl dimethyl)-1,2-dibrominated second di-ammonium salts.
(1), produce tetrapolymer:
In the reaction vessel of cleaning, add an amount of 300 deionized water successively, 5 gram sodium hydroxide stir, get acrylamide 23 grams successively, N, N-DMAA 27 grams, sodium allylsulfonate 46 grams, N-dodecyl acrylamide 4 grams join in the wide-necked bottle, stir, till monomer is dissolved fully, sodium hydroxide solution with 10% is regulated the pH value of mixed solution 5, logical at ambient temperature nitrogen is after 30 minutes, carry out polyreaction with 0.6 gram Potassium Persulphate and 0.3 gram S-WAT as initiator, behind the confined reaction 6 hours, generate low-molecular weight polymer, spray-dried then, pulverize, cross 40 mesh sieves and promptly get tetrapolymer, standby;
(2), produce drilling fluid tackifier:
Get 80 parts of weight parts of synthetic tetrapolymer and N, N '-two (dodecyl dimethyl)-1,20 parts of weight parts of 2-dibrominated second di-ammonium salts mix, and pulverize the back and cross 40 mesh sieves, promptly make drilling fluid tackifier product of the present invention.
This helps protecting the beneficial effect of the drilling fluid tackifier of hydrocarbon zone for further proof, and the performance of this drilling fluid tackifier has been carried out indoor evaluation, and its concrete outcome is as follows:
1, the performance evaluation of drilling fluid tackifier:
The indoor tackify situation of different dosage tackifier in seawater of having estimated, experimental result such as table 1:
The tackify characteristic of the different dosage tackifier of table 1 in seawater
| Dosage | ??AV??(mPa·s) | ??PV??(mPa·s) | ??YP(Pa) | ??Ф6/Ф3 |
| ??0.2％ | ??10 | ??6 | ??4 | ??2/1 |
| ??0.5％ | ??18 | ??12 | ??6 | ??4/3 |
| ??0.8％ | ??30 | ??16 | ??14 | ??10/9 |
| ??1.0％ | ??35 | ??19 | ??16 | ??12/11 |
Experimental data shows that tackifier of the present invention all have tackify effect preferably in seawater, owing to the intermicellar mutual association of molecule forms network structure, thereby has higher yield value, helps the rock of taking of Multilateral Wells.
2, the water-base drilling fluid fundamental property is estimated:
With tackifier of the present invention is the core processing agent, and the water-base drilling fluid system formulation of structure is as follows:
Seawater+0.15%NaCO
3+ 0.3%NaOH+1.0%～1.5% tackifier+2% fluid loss agent FL+3% polymeric alcohol JLX+3%KCl+5% plugging agent QWY (200 order).
Table 2 water-based drilling liquid system fundamental property
| Experiment condition | ??AV??mPa.s | ??PV??mPa.s | ??YP??Pa | ??YP/??PV | ??Ф6/??Ф3 | ??FL API??ml | ??FL HTHP??ml |
| Before rolling | ??33 | ??14 | ??19 | ??1.36 | ??12/10 | ||
| After rolling | ??36 | ??17 | ??19 | ??1.12 | ??14/12 | ??4.8 | ??10 |
Aging condition: 100 ℃ * 16h.
As can be seen, the water-base drilling fluid of structure has good rheological and good dehydration building capacity, can satisfy the oil gas drilling requirement from above experimental result.
5, water-base drilling fluid reservoir protection performance evaluation
Assessment process is carried out according to China National Petroleum industry standard SY/T6540-2002 " damage of drilling fluid and completion fluid oil reservoir indoor evaluation method ", and the dynamic filter press of employing High Temperature High Pressure is simulated under the drilling condition and the High Temperature High Pressure rock core flows, and instrument is estimated the reservoir protection performance of drilling fluid.Table 3 experimental result shows: two core permeability recovery values show that all more than 90% the water-based drilling liquid system that is made up by tackifier of the present invention has reservoir protection performance preferably.
Table 3 water-based drilling liquid system rock core flowing experiment result
| Rock core number | ??2984 | ??2875 |
| ?Ko，10 -3μm 2 | ??85.8 | ??96.4 |
| ?K 1，10 -3μm 2 | ??78.5 | ??91.1 |
| Permeability resume figure Krd, % | ??91.5 | ??94.5 |
Annotate: it is 100 ℃ of temperature, pressure 3.5MPa, time 125min that drilling fluid dynamically pollutes experiment condition.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010184837 CN101845295B (en) | 2010-05-24 | 2010-05-24 | Drilling fluid tackifier favorable for protecting oil-gas layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010184837 CN101845295B (en) | 2010-05-24 | 2010-05-24 | Drilling fluid tackifier favorable for protecting oil-gas layers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101845295A true CN101845295A (en) | 2010-09-29 |
| CN101845295B CN101845295B (en) | 2013-01-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516967A (en) * | 2011-12-02 | 2012-06-27 | 中国石油天然气集团公司 | Alkali/surfactant/polymer (ASP) flooding calcium-silicon-barium scale inhibitor and preparation method thereof |
| CN102558425A (en) * | 2010-12-08 | 2012-07-11 | 中国海洋石油总公司 | Tackifier, drilling fluid containing tackifier, and stock solution of drilling fluid |
| CN115947887A (en) * | 2021-10-08 | 2023-04-11 | 中国石油化工股份有限公司 | Tackifier for drilling fluid and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1528853A (en) * | 2003-10-09 | 2004-09-15 | 西南石油学院 | Cationic Gemini Surfactants as Oil Displacing Agents |
| CN101429425A (en) * | 2007-11-07 | 2009-05-13 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Process for preparing vinyl sulphonate polymer drilling fluid finishing agent |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1528853A (en) * | 2003-10-09 | 2004-09-15 | 西南石油学院 | Cationic Gemini Surfactants as Oil Displacing Agents |
| CN101429425A (en) * | 2007-11-07 | 2009-05-13 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Process for preparing vinyl sulphonate polymer drilling fluid finishing agent |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558425A (en) * | 2010-12-08 | 2012-07-11 | 中国海洋石油总公司 | Tackifier, drilling fluid containing tackifier, and stock solution of drilling fluid |
| CN102558425B (en) * | 2010-12-08 | 2014-03-12 | 中国海洋石油总公司 | Tackifier, drilling fluid containing tackifier, and stock solution of drilling fluid |
| CN102516967A (en) * | 2011-12-02 | 2012-06-27 | 中国石油天然气集团公司 | Alkali/surfactant/polymer (ASP) flooding calcium-silicon-barium scale inhibitor and preparation method thereof |
| CN102516967B (en) * | 2011-12-02 | 2013-08-07 | 中国石油天然气集团公司 | Alkali/surfactant/polymer (ASP) flooding calcium-silicon-barium scale inhibitor and preparation method thereof |
| CN115947887A (en) * | 2021-10-08 | 2023-04-11 | 中国石油化工股份有限公司 | Tackifier for drilling fluid and preparation method and application thereof |
| CN115947887B (en) * | 2021-10-08 | 2024-02-13 | 中国石油化工股份有限公司 | Tackifier for drilling fluid and preparation method and application thereof |
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| CN101845295B (en) | 2013-01-09 |
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Denomination of invention: A drilling fluid viscosity increasing agent beneficial for protecting oil and gas reservoirs Effective date of registration: 20231016 Granted publication date: 20130109 Pledgee: Industrial and Commercial Bank of China Limited Jingzhou Branch Pledgor: Hubei Oilfield Chemical Industry Technology Research Institute Co.,Ltd. Registration number: Y2023980061003 |
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