CN100595257C - Graft type fracturing fluid and preparation process thereof - Google Patents

Graft type fracturing fluid and preparation process thereof Download PDF

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CN100595257C
CN100595257C CN 200610173388 CN200610173388A CN100595257C CN 100595257 C CN100595257 C CN 100595257C CN 200610173388 CN200610173388 CN 200610173388 CN 200610173388 A CN200610173388 A CN 200610173388A CN 100595257 C CN100595257 C CN 100595257C
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fracturing fluid
graft
mass
water
fluid
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CN100999659A (en
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刘晓光
宋春雷
张文德
昆 徐
王丕新
苏雪峰
盛 项
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中国科学院长春应用化学研究所
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Abstract

The present invention relates to grafting type fracturing fluid comprising grafting type glue 0.4-1.0 wt %, metal cross-linking agent 0.05-0.7wt %, cracking oxidant 0.05-0.5wt % and water for the rest. The grafting type fracturing fluid of the present invention may be used to replace glue of natural plant material, and has water insoluble matter content as low as 1.0-3.0 wt %, residue after cracking of 20-60 mg/L and low cost.

Description

一种接枝型压裂液及制备方法 A graft fracturing fluid and method of preparation

技术领域 FIELD

本发明属于水基压裂液的技术领域,涉及一种接枝型压裂液及制备方法。 The present invention belongs to the technical field of water-based fracturing fluids, fracturing fluid is directed to a graft type and preparation method. 背景技术 Background technique

压裂液可使油井增产,水井增注。 Fracturing fluids can well stimulation, by injection wells. 通常所用的可分为油基压裂液和水基压裂液两种。 Generally used oil-based fracturing fluids can be divided, and two kinds of water-based fracturing fluid. 其中水基压裂液不但安全、便宜,而且粘度高、 摩阻低、易返排。 Wherein the water-based fracturing fluid is not only safe, inexpensive, and high viscosity, low friction, easy to flowback. 因而应用较广。 Therefore wider application. 目前水基压裂液成胶剂使用较多的是天然植物胶类型,如瓜尔胶,田箐胶等和聚合物类,如聚丙烯酰胺 At present water-based fracturing fluid into more glue types used are natural vegetable gum, such as guar gum, and the like Tian Qing gum polymers, such as polyacrylamide

等。 Wait. 但天然植物胶成胶剂破胶后残渣含量高达20-30%,对地层渗透率、填沙裂缝的导流能力均有伤害。 However, natural vegetable gum gel breaking into the glue residue content of up to 20-30%, the permeability of the formation, filling with sand fracture conductivity are hurt. 而聚合物成胶剂虽破胶后残渣含量低,但其与地层内盐类配伍较差,且价格较高。 Although the gelling agent and the polymer gel breaking low residue content, but poor compatibility with salts within the formation, and a higher price. 因而,制备一种性 Thus, the preparation of a sexual

价比优越的压裂液成胶剂具有较强的实际意义。 Bid superior fracturing fluid gel former has a strong practical significance.

从前关于压裂液成胶剂的技术,多是利用具有顺式羟基天然植物胶易交联的特点对其进行应用,但是这类天然植物胶大多价格较高。 On the front of fracturing fluid into the glue technique, the use of multiple features having cis hydroxyl natural vegetable gum crosslinked be easily applied, but most of these natural vegetable gum higher prices. 而价格较为便宜的天然植物类,如淀粉、纤维素类,由于其具有反式羟基而不易交联。 Natural and less expensive plants, such as starches, celluloses, since it has a trans-hydroxy group is not easy to crosslink. 而将聚合物接枝到天然植物胶类上,改善其性能, 同时以可以降低成本。 The polymer grafted onto the natural vegetable gums, improve performance, reduce costs while. 关于这类接枝型成胶剂的专利还未见报道。 Patents on such grafted into the glue has not been reported. 发明内容 SUMMARY

本发明提供一种接枝型压裂液及其制备方法。 The present invention provides a fracturing fluid and method for preparing a graft-type.

本发明的一种接枝型压裂液的构成为:接枝型成胶剂为压裂液质 Constitute a graft type according to the present invention is a fracturing fluid: graft fracturing fluid into the mass of glue

量的0.4-1.0wtn/。 The amount of 0.4-1.0wtn /. 、金属交联剂为压裂液质量的0.05-0.7 wt%、氧化破胶剂为压裂液质量的0.05-0.5wt%,其余为去离子水; Metal crosslinking agent is 0.05-0.7 wt% of the fracturing fluid mass, oxide breaker to the fracturing fluid mass 0.05-0.5wt%, the balance being deionized water;

所述的接枝型成胶剂为纤维素或淀粉与丙烯酰胺的接枝共聚物; 所述的纤维素是羧甲基纤维素,取代度为0.3-2.5;所述的淀粉是羧甲基淀粉; The graft type gelling agents are cellulose and starch graft copolymer or acrylamide; said cellulose is carboxymethyl cellulose, degree of substitution of 0.3 to 2.5; the carboxymethyl starch starch;

所述的金属交联剂为硫酸铝、硫酸铝钾、硝酸铝、四氯化钛、硫酸钛、硫酸亚钛、有机钛或有机锆; The metal cross-linking agent is aluminum sulfate, potassium aluminum sulfate, aluminum nitrate, titanium tetrachloride, titanium sulfate, titanium sulfurous acid, organotitanium or organozirconium;

所述的氧化破胶剂为过氧化氢、过硫酸铵或过硫酸钾。 The oxidizing breaker is hydrogen peroxide, ammonium persulfate or potassium persulfate. 本发明提供一种接枝型压裂液的制法的步骤和条件如下: The present invention provides a graft-type fracturing fluid production method steps and conditions are as follows:

(1).在反应容器中,将纤维素或淀粉与丙烯酰胺及水,按质量 (1) In a reaction vessel, cellulose or starch and acrylamide, and water, by mass

比为100: 10-50: 200-1000的比例制成水溶液,充N2除去体系中的氧;加入单体质量的0.02-1.00wty。 100: 10-50: 200-1000 ratio of an aqueous solution, with N2 to remove oxygen in the system; the quality of the monomer 0.02-1.00wty. 的引发剂过硫酸铵;在40-6(^C下反应2-6h,所得产物经水稀释成质量浓度为0.4-1.0 wtM的水溶液, 即得到接枝型压裂液基液或干燥后制成干粉; Ammonium persulfate initiator; 2-6h the reaction (the ^ 40-6 C, the resulting product is diluted with water to a concentration of 0.4-1.0 wtM aqueous solution, i.e. a graft obtained after drying fluid or fracturing fluid yl into a dry powder;

(2).将步骤(1)得到的接枝型压裂液基液或干燥后制成的干粉配制成接枝型压裂液基液,使用前在30化恒温4小时,然后调节pH值为6.5,加入压裂液质量的0.05-0.7 wtM的交联剂,同时,加入压裂液质量的0.05-0.7 wtM的氧化破胶剂,得到一种接枝型压裂液。 (2) The step (1) made of a powder obtained after graft-type base fracturing fluid formulated liquid or dried graft base fluid fracturing fluid, prior to use of the thermostat at 30 for 4 hours and then the pH is adjusted 6.5, added to the fracturing fluid crosslinking agent 0.05-0.7 wtM quality, while the quality of the fracturing fluid was added 0.05-0.7 wtM broken breaker oxide, to obtain a graft type fracturing fluid.

接枝型压裂液在40-75^下,2-20小时可解粘,解粘后粘度低于5mpa.s。 40-75 graft ^ fracturing fluid, the viscous solution may be 2-20 hours, the viscous solution viscosity of less than 5mpa.s.

本发明提供一种接枝型压裂液其性能完全可替代天然植物胶类, 水不溶物残渣含量为1.0-3.0 wt%,残渣含量为20-60mg/L,而且成本可降低10-20%。 The present invention provides a graft fracturing fluid properties which can substitute natural vegetable gums, water insoluble residue content of 1.0-3.0 wt%, residue content of 20-60mg / L, and the cost can be reduced 10-20% . 具体实施方式实施例l DETAILED DESCRIPTION Embodiments of Example l

在反应容器中,将羧甲基纤维素和丙烯i^安单体按羧甲基纤维素:丙烯酰胺:水(质量比)=100: 10-50: 750制成7JC溶液,充N2除去体系中 In the reaction vessel, carboxymethyl cellulose and acrylic monomers by i ^ An carboxymethylcellulose: Acrylamide: water (mass ratio) = 100: 10-50: 750 7JC prepared solution, the system was removed with N2 in

的氧,加入0.5wt0/。 Oxygen was added 0.5wt0 /. (相对单体质量)的引发剂(lwf/。过硫Mf安溶液),在50^C下反应5h;反应产物稀释«量浓度为0.4-1.0 wf/o的水溶液,可得到一种接枝型]5^液«; S^表观粘度测皿用RV-20旋转粘度计,在 (Relative to the monomer mass) of the initiator (. Lwf / Mf An persulfate solution), the reaction for 5h ^ C 50; the reaction was diluted «molar concentration of 0.4-1.0 wf / o aqueous solution, to obtain a graft type] was 5 ^ «; S ^ apparent viscosity measured with RV-20 pan rotational viscometer

45GC下剪切速率下完成。 45GC completed the shear rate. 结果列于表1 -表l羧甲基纤维素:丙烯酰胺(质量比) 基液表观粘度mpa.s The results are shown in Table 1 - Table l carboxymethylcellulose: acrylamide (ratio by mass) Apparent viscosity base fluid mpa.s

跳10 60 Jump 1060

跳20 75 Jump 2075

跳30 115 Jump 30115

跳40 150 Jump 40150

100: 50 178 100: 50178

实施例2 Example 2

在反应容器中,将羧甲基淀粉和丙烯酰胺单体按羧甲基淀粉:丙烯酰胺:水(质量比)=100: 30-60: 200制成水溶液;充N2除去体 In the reaction vessel, carboxymethyl starch and acrylamide monomers press carboxymethyl starch: Acrylamide: water (mass ratio) = 100: 30-60: 200 aqueous solution made; N2 charge removing member

系中的氧,加入1.0wtM (相对单体质量)的引发剂(lwtM过硫酸铵溶液),在4(^C下反应6h;反应产物稀释成质量浓度为0.4-1.0 wt% 的水溶液,可得到一种接枝型压裂液基液;基液表观粘度测量采用RV-20旋转粘度计,在45QC下170S—1剪切速率下完成。结果列于表2: 表2 Based oxygen added 1.0wtM (relative to the monomer mass) of the initiator (lwtM solution of ammonium persulfate), 6h the reaction of (^ the C 4; reaction product was diluted to a concentration of 0.4-1.0 wt% aqueous solution, may be to obtain a graft base fluid fracturing fluid; apparent viscosity was measured using a group RV-20 viscometer, at 45QC completed at a shear rate of 170S-1 results are shown in table 2: table 2

羧甲基淀粉:丙烯酰胺(质量比)......................基液表观粘度mpa.s................... Carboxymethyl starch: acrylamide (ratio by mass) was apparent viscosity mPa.s yl ...................... ......... ..........

跳40 105 跳50 135 跳60 180 Jump jump 50 135 40 105 60 180 Jump

实施例3 Example 3

在反应容器中,将羧甲基纤维素和丙烯酰胺单体按羧甲基纤维 In the reaction vessel, and carboxymethyl cellulose by acrylamide monomers carboxymethyl cellulose

素:丙烯酰胺:水(质量比)=100: 30: 1000制成水溶液,充N2除 Su: Acrylamide: water (mass ratio) = 100: 30: 1000 solution made with N2 addition

去体系中的氧,加入0.02wt% (相对单体质量)的引发剂(lwty。过硫酸铵溶液),在60QC下反应2h;所得产物经水稀释成质量浓度为0.4-1.0 WtM的水溶液,即得到一种接枝型压裂液的基液; Oxygen to the system was added 0.02wt% (relative to the monomer mass) of the initiator (. Lwty solution of ammonium persulfate), at a reaction 2h at 60QC; the resulting product is diluted with water to a concentration of an aqueous solution of 0.4-1.0 WtM, i.e., obtain a graft base liquid fracturing fluid;

接枝型压裂液的基液在30QC恒温4小时,调节体系pH值为6.5 后,搅拌下加入硫酸铝钾和过硫酸铵水溶液,其中硫酸铝钾和过硫酸铵在的使用量分别为压裂液质量的0.5 wt。 Graft base liquid in the fracturing fluid temperature 30QC for 4 hours after the system is adjusted pH 6.5, was added under stirring and potassium aluminum sulfate aqueous ammonium persulfate solution, wherein the aluminum potassium sulfate and ammonium persulfate are used in an amount of pressure 0.5 wt crack liquid mass. /。 /. 和0.05wt%,可得到一种接枝型压裂液。 And 0.05wt%, to obtain a graft fracturing fluid.

固定170S"剪切速率,测量接枝型压裂液基液表观粘度;当体系交联成凝胶后,在45^C, 170S"剪切速率下剪切l小时,测量凝胶的 Fixed 170S "shear rate, measured graft apparent viscosity fracturing fluid base fluid; crosslink into the system when the gel at 45 ^ C, 170S" l hour at a shear rate of shear, the measured gel

表观粘度。 Apparent viscosity. 表观粘度测量采用RV-20旋转粘度计完成。 The apparent viscosity measured using a rotational viscometer RV 20-completion.

表3 table 3

羧甲基纤维基液粘度初始凝胶30分后凝1小时后凝破胶后粘素:丙烯酰mpa.s 粘度mpa.s 胶粘度胶粘度度mpa.s Carboxymethyl cellulose gel base fluid viscosity - initial 30 minutes after 1 hour after coagulation coagulation gel breaking cadherin: acryloyl mpa.s viscosity mpa.s gumminess gumminess degrees mpa.s

胺(质量比mpa.s mpa.s Amine (mass ratio mPa.s mPa.s

^s2_ ^ S2_

跳30 115 420 250 140 Jump 30115420250140

实施例4 Example 4

在反应容器中,将羧甲基淀粉和丙烯酰胺单体按羧甲基淀粉:丙烯酰胺:水(质量比)=100: 50: 200制成水溶液,充N2除去体系中的氧,加入1.0wtn/。 In the reaction vessel, carboxymethyl starch and acrylamide monomers press carboxymethyl starch: Acrylamide: water (mass ratio) = 100: 50: 200 aqueous solution made with N2 to remove oxygen in the system was added 1.0wtn /. (相对单体质量)的引发剂(lwty。过硫酸铵溶 (Relative to the monomer mass) of the initiator (lwty. Ammonium persulfate solution

液),在50QC下反应5h;所得产物经水稀释成质量浓度为0.4-1.0 wt% Solution), reacted for 5h 50QC; the resulting product is diluted with water to a concentration of 0.4-1.0 wt%

的水溶液,可得到一种接枝型压裂液的基液。 Aqueous solution, to obtain a graft base liquid fracturing fluid.

接枝型压裂液的基液在30QC恒温4小时,调节体系pH值为6.5 后,搅拌下加入硫酸铝钾和过硫酸铵水溶液,其中硫酸铝钾和过硫酸铵的使用量分别为压裂液质量的0.7 wt。 Graft base liquid in the fracturing fluid temperature 30QC for 4 hours after the system is adjusted pH 6.5, was added under stirring and potassium aluminum sulfate aqueous ammonium persulfate solution, wherein the aluminum potassium sulfate and ammonium persulfate are used in amounts fracturing liquid mass of 0.7 wt. /。 /. 和0.5wt%,可得到一种接枝型压裂液。 And 0.5wt%, to obtain a graft fracturing fluid.

固定170S"剪切速率,测量接枝型压裂液基液表观粘度;当体系交联成凝胶后,在45^, 170S"剪切速率下剪切l小时,测量凝胶的表观粘度。 Fixed 170S "shear rate, measured graft apparent viscosity fracturing fluid base fluid; crosslink into the system when the gel, in the 45 ^, 170S" shear at a shear rate of l hour, the gel was measured apparent viscosity. 表观粘度测量采用RV-20旋转粘度计完成。 The apparent viscosity measured using a rotational viscometer RV 20-completion.

表4 Table 4

羧甲基淀 基液粘度 初始凝胶 30分后凝 1小时后凝 破胶后粘 Group carboxymethyl starch gel after the initial liquid viscosity after 1 hour and 30 minutes after coagulation coagulation broken plastic viscosity

粉:丙烯酰 mpa.s 粘度mpa.s 胶粘度 胶粘度 度mpa.s Powder: acryloyl mpa.s viscosity mpa.s gumminess gumminess degrees mpa.s

胺(质量比 mpa.s mpa.s Amine (mass ratio mPa.s mPa.s

g/g) g / g)

跳50 135 380 210 130 Jump 50135380210130

实施例5 Example 5

在反应容器中,将羧甲基纤维素和丙烯酰胺单体按羧甲基纤维素:丙烯酰胺:水(质量比)=100: 20: 1000制成水溶液,充N2除去体系中的氧,加入0.5wtM (相对单体质量)的引发剂(lwtM过硫酸铵溶液),在40GC下反应6h;所得产物经水稀释成质量浓度为0.4-1.0 wtM的水溶液,可得到一种接枝型压裂液的基液。 In the reaction vessel, and carboxymethyl cellulose by acrylamide monomers carboxymethyl cellulose: Acrylamide: water (mass ratio) = 100: 20: 1000 solution made with N2 to remove oxygen in the system was added 0.5wtM (relative to the monomer mass) of the initiator (lwtM solution of ammonium persulfate), at a reaction 6H 40GC; the resulting product is diluted with water to a concentration of 0.4-1.0 wtM aqueous solution of a graft obtained fracturing base liquid solution.

接枝型压裂液的基液在30QC恒温4小时;取恒温好的接枝型压裂液基液50.25g,放于恒量离心管中,在3000r/min的转速下离心30min,慢慢倒出上层清液,再加入蒸馏水50mL,用玻璃棒搅拌洗涤,再离心20min,去除上层清液,将离心管在105GC烘干至恒重。 Graft base liquid in the fracturing fluid temperature 30QC 4 hours; good graft taken thermostatic fluid 50.25 g of base fracturing fluid, placed in constant centrifuge tube, centrifuged 30min at a speed of 3000r / min, and slowly pour the supernatant, and then adding distilled water 50mL, washed with stirring with a glass rod, then centrifuged 20min, removing the supernatant, the centrifuge tube 105GC dried to constant weight. 水不溶物含量按下式计算:T|=m/0.25 x層 Water-insoluble content is calculated as follows: T | = m / 0.25 x layer

式中:Tl-水不溶物含量,%; m-水不溶物质量,单位:g; Wherein: Tl- water insoluble content,%; m- water insoluble mass, unit: G;

将剩余接枝型压裂液基液调节pH值为6.5后,搅拌下加入硫酸铝钾和过硫酸铵水溶液,其中硫酸铝钾和过硫酸铵在的使用量分别为压裂液质量的0.05 wty。 The remaining graft base fracturing fluid was adjusted a pH of 6.5, was added under stirring and potassium aluminum sulfate aqueous ammonium persulfate solution, wherein the aluminum potassium sulfate and ammonium persulfate are used in amounts of 0.05 wty fracturing fluid mass . 和0.15wt%,可得到一种接枝型压裂液。 And 0.15wt%, to obtain a graft fracturing fluid.

体系交联成凝胶后,在45QC下恒温24h,将解凝后产物离心过滤,烘干后称重。 After the system was crosslinked into a gel, at a constant temperature at 45QC 24h, after peptization product centrifugation, dried and weighed. 残渣含量按下式计算: Residue content is calculated as follows:

残渣含量=(残渣和离心试管的质量一离心试管的质量)mg/破胶液体积L Residue content = (mass of the centrifuge tube and residue mass of a centrifuge tube) mg / L Volume broken glue

此条件下压裂液的水不溶物含量为1.0%,残渣含量为20mg/L。 Water insoluble matter fracturing fluid under conditions of 1.0%, residue content of 20mg / L. 实施例6 Example 6

在反应容器中,将羧甲基淀粉和丙烯酰胺单体按羧甲基淀粉:丙 In the reaction vessel, carboxymethyl starch and acrylamide monomers press carboxymethyl starch: propyl

烯酰胺:水(质量比)=100: 30: 200制成水溶液,充N2除去体系 Enamide: water (mass ratio) = 100: 30: 200 aqueous solution is made, the system was removed with N2

中的氧,加入0.7wtQ/。 Oxygen was added 0.7wtQ /. (相对单体质量)的引发剂(lwt。/。过硫酸铵溶液),在6(^C下反应4h;所得产物经水稀释成质量浓度为0.4-1.0 wt%的水溶液,可得到一种接枝型压裂液的基液。 (Relative to the monomer mass) of the initiator (. Lwt./ solution of ammonium persulfate), the reaction for 4h (the ^ C 6; the resulting product is diluted with water to a concentration of 0.4-1.0 wt% aqueous solution, to obtain one kind of graft base liquid fracturing fluid.

接枝型压裂液基液在30QC恒温4小时;取恒温好的接枝型压裂液基液50.25g,放于恒量离心管中,在3000r/min的转速下离心30min,慢慢倒出上层清液,再加入蒸馏水50mL,用玻璃棒搅拌洗涤,再离心20min,去除上层清液,将离心管在105^烘干至恒重。 Graft base liquid fracturing fluid 30QC thermostat 4 hours; good graft taken thermostatic fluid 50.25 g of base fracturing fluid, placed in constant centrifuge tube, centrifuged 30min at a speed of 3000r / min, and decanted supernatant, and then adding distilled water 50mL, washed with stirring with a glass rod, then centrifuged 20min, supernatant was removed, centrifuged in the tube 105 ^ dried to constant weight. 水不溶物含量按下式计算:Tl=m/0.25 xlOO Water-insoluble content is calculated as: Tl = m / 0.25 xlOO

式中:T!-水不溶物含量,%; m-水不溶物质量,单位:g; 将剩余接枝型压裂液基液调节pH值为6.5后,搅拌下加入硫酸铝钾和过硫酸铵水溶液,其中硫酸铝钾和过硫酸铵在的使用量分别为 Where: T - Water insoluble matter,%; m- water insoluble mass, unit:! G; the remaining graft base fracturing fluid was adjusted a pH of 6.5, was added under stirring and aluminum sulfate potassium persulfate aqueous ammonium, wherein the aluminum potassium sulfate and ammonium persulfate are used in amounts

压裂液质量的0.25 wt。 0.25 wt fracturing fluid quality. /。 /. 和0.1wt%,可得到一种接枝型压裂液。 And 0.1wt%, to obtain a graft fracturing fluid.

体系交联成凝胶后,在45QC下恒温24h,将解凝后产物离心过 After the system was crosslinked into a gel, at 45QC temperature 24h, the product was centrifuged after peptization

滤,烘干后称重。 Filtered off, dried and weighed. 残渣含量按下式计算: Residue content is calculated as follows:

残渣含量- (残渣和离心试管的质量一离心试管的质量)mg/破胶液体积L A residue content of - (mass of the centrifuge tube and residue mass of a centrifuge tube) mg / L Volume broken glue

此条件下压裂液的水不溶物含量为1.4%,残渣含量为40mg/L。 Water insoluble matter fracturing fluid under conditions of 1.4% residue content of 40mg / L.

Claims (2)

1、一种接枝型压裂液,其特征在于,其成分及配比为:接枝型成胶剂为压裂液质量的0.4-1.0wt%,金属交联剂为压裂液质量的0.05-0.7wt%,氧化破胶剂为压裂液质量的0.05-0.5wt%,其余为去离子水; 所述的接枝型成胶剂为纤维素或淀粉与丙烯酰胺的接枝共聚物; 所述的纤维素是羧甲基纤维素,取代度为0.3-2.5;所述的淀粉是羧甲基淀粉; 所述的金属交联剂为硫酸铝、硫酸铝钾、硝酸铝、四氯化钛、硫酸钛、硫酸亚钛、有机钛或有机锆; 所述的氧化破胶剂为过氧化氢、过硫酸铵或过硫酸钾。 A graft fracturing fluid, characterized in that the ratio of the ingredients and: graft gelling agent is 0.4-1.0wt% by mass of the fracturing fluid, fracturing fluid crosslinking agent is a metal mass 0.05-0.7wt%, oxide breaker to the fracturing fluid 0.05-0.5wt% by mass, and the remainder deionized water; the graft type gelling agents as cellulose or starch grafted copolymers of acrylamide and ; said cellulose is carboxymethyl cellulose, degree of substitution of 0.3 to 2.5; the starch carboxymethyl starch; the metal crosslinking agent is aluminum sulfate, potassium aluminum sulfate, aluminum nitrate, tetrachloro titanium, titanium sulfate, titanium sulfurous acid, organotitanium or organozirconium; the oxide breaker hydrogen peroxide, ammonium persulfate or potassium persulfate.
2、 如权利要求1所述的一种接枝型压裂液的制备方法,其特征在于,步骤和条件为:(1) .在反应容器中,将纤维素或淀粉与丙烯酰胺及水,按质量比为100: 10-50: 200-1000的比例制成水溶液,充N2除去体系中的氧;加入单体质量的0.02-1.00wt。 2. The method as claimed in claim 1 preparing a graft-type fracturing fluids, characterized in that the steps and conditions: (1) In a reaction vessel, and acrylamide cellulose or starch and water, a mass ratio of 100: 10-50: 200-1000 ratio of an aqueous solution, with N2 to remove oxygen in the system; added monomer mass 0.02-1.00wt. /。 /. 的引发剂过硫酸铵;在40-6(A:下反应2-6h,所得产物经水稀释成质量浓度为0.4-1.0 wt。/。的水溶液, 即得到接枝型压裂液基液或干燥后制成干粉;(2) .将步骤(1)得到的接枝型压裂液基液或干燥后制成的干粉配制成接枝型压裂液基液,使用前在30QC恒温4小时,然后调节pH值为6.5,加入压裂液质量的0.05-0.7 wt。/。的交联剂,同时,加入压裂液质量的0.05-0.7 wtM的氧化破胶剂,得到一种接枝型压裂液。 Ammonium persulfate initiator; in 40-6 (A:. 2-6h reaction solution, the resulting product is diluted with water to a concentration of 0.4-1.0 wt./, i.e., to give a graft base fluid or fracturing fluid after drying powder prepared; (2) the step (1) made of a powder obtained after graft-type base fracturing fluid formulated liquid or dried fracturing fluid graft base fluid, a thermostat at 30QC 4 hours before use. and then adjusted to pH 6.5, added to the fracturing fluid mass 0.05-0.7 wt./. crosslinkers, while the quality of the fracturing fluid was added 0.05-0.7 wtM broken breaker oxide, to obtain a graft type Fracturing fluid.
CN 200610173388 2006-12-29 2006-12-29 Graft type fracturing fluid and preparation process thereof CN100595257C (en)

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