WO2016179742A1 - 一种可回收速溶稠化酸 - Google Patents

一种可回收速溶稠化酸 Download PDF

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WO2016179742A1
WO2016179742A1 PCT/CN2015/078533 CN2015078533W WO2016179742A1 WO 2016179742 A1 WO2016179742 A1 WO 2016179742A1 CN 2015078533 W CN2015078533 W CN 2015078533W WO 2016179742 A1 WO2016179742 A1 WO 2016179742A1
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acid
thickening
parts
viscosity
recyclable
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PCT/CN2015/078533
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English (en)
French (fr)
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孙虎
王祖文
张冕
高燕
邵秀丽
李婧
王改红
袁冬蕊
景志明
徐俊芳
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中国石油集团川庆钻探工程有限公司长庆井下技术作业公司
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Priority to US15/572,036 priority Critical patent/US10494567B2/en
Priority to PCT/CN2015/078533 priority patent/WO2016179742A1/zh
Priority to CA2984811A priority patent/CA2984811C/en
Publication of WO2016179742A1 publication Critical patent/WO2016179742A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/72—Eroding chemicals, e.g. acids
    • C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
    • E21B49/0875—Well testing, e.g. testing for reservoir productivity or formation parameters determining specific fluid parameters

Definitions

  • the invention relates to a recyclable instant thickening acid, which is mainly used for recovering and renovating the acidification liquid of the gas well carbonate reservoir.
  • Thickened acid is the main acid system of acid pressure in the Lower Carbonate Reservoir of Changqing Gas Field. It has high viscosity, good retardation and seam-forming performance, long acid etching distance and good transformation effect.
  • the thickened acid used in the Changqing gas field has problems such as the inability to recycle and reuse the residual acid solution after acidification, and the thickening time of the liquid preparation.
  • Changqing Oilfield Company developed a new clean thick acid system, which has good temperature resistance, shear resistance, low fluid loss, slow speed and corrosion inhibition performance, continuous mixing and low damage. Technical advantages. However, the thickened acid thickens for a long time and cannot be recycled.
  • the present invention proposes a recyclable instant thickening acid, which can be used for acid-injection construction while using the thickened acid; after acidification, the residual acid of the rubber can be recycled without chemical treatment. Renew It is used for thickening acid dosing to ensure green production and sustainable development of gas fields.
  • a recyclable instant thickening acid which is prepared from the following components in the following mass ratios:
  • Thickener 1.5 parts to 3 parts
  • Potassium chloride 0.5 parts to 3 parts
  • the thickening agent is a mass ratio of 40% to 70% N-lauroyl-N'-hydroxyethyl-N'-carboxypropyl ethylenediamine propionate or a derivative thereof, 4 to 12% ethanol And a mixture of 18 to 56% water.
  • the hydrochloric acid solution has a mass concentration of 15 to 30%.
  • the thickening time of the recyclable instant thickening acid is less than 30 s, the viscosity is at least 60 mPa ⁇ s under normal ground temperature conditions, the viscosity is ⁇ 15 mPa ⁇ s when the local layer temperature is greater than 105 ° C, and the viscosity is ⁇ 5 mPa at 120 ° C. s.
  • the recyclable instant thickening acid in the present invention has a fast thickening speed and can be used for acid-bonding construction while edge-matching.
  • the recyclable instant thickening acid of the present invention has a viscosity of at least 60 mPa ⁇ s at room temperature (25 ° C), which reduces the acid loss of thickened acid.
  • the recyclable instant thickening acid in the present invention has a viscosity of at least 60 mPa ⁇ s at room temperature (25 ° C), a viscosity of ⁇ 15 mPa ⁇ s when the local layer temperature is greater than 105 ° C, and a viscosity of ⁇ 120 ° C. 5mPa ⁇ s is conducive to the return of residual acid.
  • the recyclable instant thickening acid in the present invention the acidified returning liquid is separated into the acid tank after gas-liquid separation, and after standing for 2 hours, the residual acid solution and the thickening agent are layered, respectively, and the residual acid liquid and the thick liquid are separately collected.
  • the chemical agent is further added with a small amount of thickening agent, hydrochloric acid and potassium chloride to form a recyclable fast-dissolving acid; the thickener, hydrochloric acid and water are reduced, and the construction operation cost is reduced.
  • the technology can be realized three times. The above acidizing operation.
  • the recyclable instant thickening acid in the present invention ensures that the recyclable fast-dissolving acid has a viscosity of at least 60 mPa ⁇ s at room temperature (25 ° C), and a viscosity of ⁇ 15 mPa when the local layer temperature is greater than 105 ° C. ⁇ s, viscosity ⁇ 5mPa ⁇ s at 120 ° C, is conducive to the viscosity adjustment of the recoverable thickened acid.
  • Fig. 1 is a graph showing changes in temperature resistance T and viscosity value ⁇ of an original acid as a function of time.
  • Fig. 2 is a graph showing changes in temperature resistance T and viscosity value ⁇ of the residual acid solution with time.
  • the above thickening agent is a mixture of 55% N-lauroyl-N'-hydroxyethyl-N'-carboxypropyl ethylenediamine propionate or a derivative thereof, 8% ethanol and 37% water. .
  • the mass concentration of the above hydrochloric acid solution was 15%.
  • the thickening time of the recyclable instant thickening acid is less than 30 s, the viscosity is at least 60 mPa ⁇ s at normal ground temperature, the viscosity is ⁇ 15 mPa ⁇ s when the local layer temperature is greater than 105 ° C, and the viscosity is ⁇ 5 mPa ⁇ s at 120 ° C. .
  • the acidification is carried out by using a recyclable instant thickening acid prepared in this embodiment, and the thickened acid prepared under the normal temperature condition (25 ° C) has a thickening time of 15 s, a viscosity of 83 mPa ⁇ s, and temperature resistance.
  • the above thickening agent is a mixture of 48% N-lauroyl-N'-hydroxyethyl-N'-carboxypropyl ethylenediamine propionate or a derivative thereof, 10% ethanol and 42% water. .
  • the mass concentration of the above hydrochloric acid solution was 20%.
  • the thickening time of the recyclable instant thickening acid in the present embodiment is less than 30 s, the viscosity is at least 60 mPa ⁇ s under normal ground temperature conditions, the viscosity is ⁇ 15 mPa ⁇ s when the local layer temperature is greater than 105 ° C, and the local layer temperature is greater than 120 ° C. Viscosity ⁇ 5 mPa ⁇ s.
  • the acidification is carried out by using a recyclable instant thickening acid prepared in this embodiment, and the thickened acid prepared by the test under the normal temperature condition (25 ° C) has a thickening time of 12 s, a viscosity of 94 mPa ⁇ s, and temperature resistance.
  • the ability to reach 106 ° C is consistent with the repeated acidification operating conditions of the present invention, and is more effective than Example 1.
  • the above thickening agent is a mixture of 63% N-lauroyl-N'-hydroxyethyl-N'-carboxypropyl ethylenediamine propionate or a derivative thereof, 6% ethanol and 31% water. .
  • the mass concentration of the above hydrochloric acid solution was 25%.
  • the acidification is carried out by using a recyclable instant thickening acid prepared in this embodiment, and the thickened acid prepared by the test under the normal temperature condition (25 ° C) has a thickening time of 18 s, a viscosity of 80 mPa ⁇ s, and temperature resistance.
  • the above thickener is a mixture of 51% N-lauroyl-N'-hydroxyethyl-N'-carboxypropyl ethylenediamine propionate or a derivative thereof, 9% ethanol and 40% water. .
  • the mass concentration of the above hydrochloric acid solution was 30%.
  • the acidification is carried out by using a recyclable instant thickening acid prepared in this embodiment, and the thickened acid prepared under the normal temperature condition (25 ° C) has a thickening time of 20 s, a viscosity of 63 mPa ⁇ s, and temperature resistance.
  • the ability to reach 103 ° C, although in accordance with the repeated acidification operating conditions of the present invention, is less effective than the first three embodiments.
  • the thickener, potassium chloride and hydrochloric acid solution are pumped together into a sand mixer to directly mix and form a recyclable instant thickening acid;
  • step b The acid recovery of the recyclable fast-dissolved acid-pressure inlet well layer mixed in step a at a temperature of 0 ° C to 110 ° C;
  • the residual acid solution discharged into the acid tank is recovered, and after standing for 2 hours, the residual acid solution and the thickening agent are separately collected into different acid tanks;
  • the viscosity of the thickener and the concentration of hydrochloric acid in the residual acid solution. If the viscosity of the thickener does not meet the design requirements of the original thickener, continue to add the thickener until the viscosity meets the requirements; The concentration of hydrochloric acid does not reach the concentration requirement of the original hydrochloric acid solution, and the high concentration of hydrochloric acid is continued (the concentration of the high concentration hydrochloric acid is 36 to 38%) until the acid concentration meets the requirements;
  • step e Adding the thickening agent and hydrochloric acid solution obtained in step e to potassium chloride, pumping them into the sand mixing vehicle, and injecting the ground layer again for acidification construction.
  • the present embodiment is analyzed in combination with the specific implementation effects.
  • the acid solutions of the different proportions of the components prepared in the first embodiment to the fourth embodiment are carried out by the method proposed in the embodiment 5, and the corresponding effect data are obtained:
  • the first four examples were used to analyze the effects of different proportions of the components of the recoverable instant thickening acid, and the analysis is as follows:
  • the ratio in Example 2 is the optimum ratio, and the effect of the preparation experiment of Example 2 is larger than that of the other three examples, and the thickening time is shorter.
  • the temperature resistance is relatively strong. Therefore, when the acidification can be carried out by using the recyclable instant thickening acid under the prepared ratio, a better acidification effect can be obtained, and the repeated use rate is high and the effect is good.
  • longitudinal ratio analysis can also be performed, using the original acid solution (ie, the acid solution used in step a) and the residual acid solution (ie, the acid solution obtained in step e) to compare the temperature resistance curve and the viscosity value.
  • the results are shown in Fig. 1 and Fig. 2.
  • Fig. 1 is a graph showing the temperature resistance T and the viscosity value ⁇ of the original acid as a function of time
  • Fig. 2 is the temperature resistance T and viscosity of the residual acid solution.
  • the graph of the change of the value ⁇ with time shows that the temperature resistance and viscosity of the residual acid solution are lower than that of the original acid solution, but the difference is not very large, if When the temperature resistance and the viscosity value are lowered, a certain amount of the high-concentration element component is added, and similar effects can be obtained in effect. Therefore, the residual acid solution of the present invention can also be used as an acidizing operation, thereby being
  • the recyclable instant thickening acid of the invention can be repeatedly acidified by using an acid liquid, and the ground has no residual night discharge, which reduces surface pollution; and the return liquid can be reused, thereby reducing the construction operation cost.
  • the invention can realize the “zero discharge” of the returning and discharging liquid after acidification, and the repeated use reduces the comprehensive cost of the thickened acid, and the large-scale popularization and application can greatly reduce the environmental pollution problem of the thickened acid.

Abstract

本发明涉及一种可回收速溶稠化酸，主要用于气井碳酸盐岩储层酸化液可回收再利用增产改造作业。该可回收速溶稠化酸是由以下组分配制而成：稠化剂：1.5份～3份、氯化钾：0.5份～3份、盐酸溶液：100份，上述组分均为重量百分数；所述稠化剂是由质量比为40％～70％N-月桂酰基-N'-羟乙基-N'-羧丙基乙二胺丙酸盐或其衍生物、4～12％乙醇和18～56％水组成的混合物。采用该稠化酸进行酸化施工后，残酸液不需要进行化学处理即可重新配制酸液再次用于酸化施工，保障气田的绿色环保生产和可持续发展；该研究成果不仅具有显著的经济效益，而且具有重要的社会效益，具有很大的推广应用前景。

Description

一种可回收速溶稠化酸 技术领域
本发明涉及一种可回收速溶稠化酸，主要用于气井碳酸盐岩储层酸化液可回收再利用增产改造作业。
背景技术
稠化酸是长庆气田下古碳酸盐岩储层酸压的主要酸液体系，其具有较高的粘度及良好的缓速、造缝性能，酸蚀作用距离长，改造效果好。但是，目前长庆气田使用的稠化酸存在酸化后残酸液不能回收再利用、配液增稠时间长等问题。
自从1997年Schlumberger Dowell公司推出基于粘弹性表面活性剂的清洁压裂液问世以来，粘弹性表面活性剂技术已在油气田增产措施中得到广泛的应用和推广。国内对清洁压裂液的报道已屡见不鲜，因为相对于传统的聚合物压裂液,其容易配置、不需胶联剂和破胶剂、无伤害和高度保持支撑剂填充层的渗透率等特点备受油田应用的青睐。根据VES使用的经验，近两年来，国外已研制出了性能优越的基于两性表面活性剂的粘弹性酸，成功地应用于酸压中。但是该稠化酸不能回收再利用。
面对致密的碳酸盐岩资源开发比例增加，亟需寻找提升致密碳酸盐岩储层改造效果的新技术。2014年，长庆油田公司研发出新型清洁稠化酸体系，该体系具有较好的耐温抗剪切性、低滤失、缓速及缓蚀性能好，可连续混配及清洁低伤害等技术优势。但是该稠化酸增稠时间长且不能回收再利用。
目前，国内针对表活剂稠化酸体系可回收的研究与应用报道暂未出现，因此开发和应用表活剂稠化酸直接混配、残酸液再利用技术具有较好的应用前景。
发明内容
为解决上述技术问题，本发明提出了一种可回收速溶稠化酸，采用该稠化酸可实现边配边注酸化施工；酸化施工后，破胶返排残酸不需要进行化学处理即可重新 用于稠化酸配液，保障气田的绿色环保生产和可持续发展。
本发明是通过采用下述技术方案实现的：
一种可回收速溶稠化酸，它是由以下组分按如下质量组分比例配制而成：
稠化剂：1.5份～3份；
氯化钾：0.5份～3份；
盐酸溶液：100份。
所述的稠化剂是由质量比为40％～70％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、4～12％乙醇和18～56％水组成的混合物。
所述的盐酸溶液的质量浓度为15～30％。
所述的可回收速溶稠化酸增稠时间小于30s，在地面常温条件下，粘度至少为60mPa·s；当地层温度大于105℃时，粘度≤15mPa·s；120℃时，粘度≤5mPa·s。
本发明的有益效果：
一、本发明中的这种可回收速溶稠化酸，增稠速度快，可实现边配边注酸化施工。
二、本发明中的这种可回收速溶稠化酸，在地面常温条件下(25℃)，粘度至少为60mPa·s,降低了稠化酸滤失。
三、本发明中的这种可回收速溶稠化酸，在地面常温条件下(25℃)，粘度至少为60mPa·s,当地层温度大于105℃时粘度≤15mPa·s，120℃时粘度≤5mPa·s，有利于残酸液返排。
四、本发明中的这种可回收速溶稠化酸，酸化返排液经气液分离后进入酸罐，静置2小时残酸液和稠化剂分层后，分别收集残酸液和稠化剂，再分别添加少量稠化剂、盐酸和氯化钾后形成可回收速溶稠化酸；降低了稠化剂、盐酸、水量，同时降低了施工作业成本，理论上该技术可实现3次以上酸化作业。
五、本发明中的这种可回收速溶稠化酸，保证了可回收速溶稠化酸在地面常温条件下(25℃)时粘度至少为60mPa·s,当地层温度大于105℃时粘度≤15mPa·s，120℃时粘度≤5mPa·s，有利于对可回收稠化酸粘度调节。
以下将结合附图对本发明做进一步详细说明。
附图说明
图1为原始酸液的耐温能力T和粘度值η随时间的变化而变化的曲线图。
图2为残酸液的耐温能力T和粘度值η随时间的变化而变化的曲线图。
具体实施方式
实施例1：
本实施例提供一种可回收速溶稠化酸，它是由以下组分按如下质量组分比例配制而成：
稠化剂：1.5份；
氯化钾：0.5份；
盐酸溶液：100份。
上述稠化剂是由质量比为55％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、8％乙醇和37％水组成的混合物。
上述盐酸溶液的质量浓度为15％。
这种可回收速溶稠化酸增稠时间小于30s，在地面常温条件下，粘度至少为60mPa·s；当地层温度大于105℃时，粘度≤15mPa·s；120℃时，粘度≤5mPa·s。
用本实施例配制的一种可回收速溶稠化酸进行酸化，经检验测量，在地面常温条件下(25℃)配制的稠化酸，增稠时间为15s，粘度为83mPa·s，耐温能力达到102℃，符合本发明的反复酸化作业条件。
实施例2：
本实施例提供一种可回收速溶稠化酸，它是由以下组分按如下质量组分比例配制而成：
稠化剂：2份；
氯化钾：1份；
盐酸溶液：100份。
上述稠化剂是由质量比为48％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、10％乙醇和42％水组成的混合物。
上述盐酸溶液的质量浓度为20％。
本实施例中的可回收速溶稠化酸增稠时间小于30s，在地面常温条件下，粘度至少为60mPa·s,当地层温度大于105℃时粘度≤15mPa·s，当地层温度大于120℃时粘度≤5mPa·s。
用本实施例配制的一种可回收速溶稠化酸进行酸化，经检验测量，在地面常温条件下(25℃)配制的稠化酸，增稠时间为12s，粘度为94mPa·s，耐温能力达到106℃，符合本发明的反复酸化作业条件，且相比于实施例1，效果更佳。
实施例3：
本实施例提供一种可回收速溶稠化酸，它是由以下组分按如下质量组分比例配制而成：
稠化剂：2.5份；
氯化钾：2份；
盐酸溶液：100份。
上述稠化剂是由质量比为63％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、6％乙醇和31％水组成的混合物。
上述盐酸溶液的质量浓度为25％。
用本实施例配制的一种可回收速溶稠化酸进行酸化，经检验测量，在地面常温条件下(25℃)配制的稠化酸，增稠时间为18s，粘度为80mPa·s，耐温能力达到107℃，符合本发明的反复酸化作业条件，相比于实施例1和实施例2，耐温能力有所提升，但是粘度和增稠时间相较于前两者较差。
实施例4：
本实施例提供一种可回收速溶稠化酸，它是由以下组分按如下质量组分比例配制而成：
稠化剂：3份；
氯化钾：3份；
盐酸溶液：100份。
上述稠化剂是由质量比为51％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、9％乙醇和40％水组成的混合物。
上述盐酸溶液的质量浓度为30％。
用本实施例配制的一种可回收速溶稠化酸进行酸化，经检验测量，在地面常温条件下(25℃)配制的稠化酸，增稠时间为20s，粘度为63mPa·s，耐温能力达到103℃，虽然符合本发明的反复酸化作业条件，但是相较于前三个实施例，效果不佳。
实施例5：
上述四个实施例的不同配置比例，得到的酸液的性能在一定程度上有所不同，均通过以下方式进行实施得出：
a.将稠化剂、氯化钾和盐酸溶液一起泵入混砂车直接混配形成可回收速溶稠化酸；
b.在温度0℃-110℃下将步骤a混合的可回收速溶稠化酸压进气井地层进行酸化施工；
c.酸化结束后关井30min，控制放喷；
d.将放喷的残酸液回收至酸罐中，静置2小时分层后，将残酸液和稠化剂分别收集到不同的酸罐中；
e.检测稠化剂的粘度和残酸液中盐酸的浓度，若稠化剂的粘度未达到原来的稠化剂的设计要求，则继续添加稠化剂直到粘度符合要求为止；若残酸液中盐酸的浓度未达到原来盐酸溶液的浓度要求，继续添加高浓度的盐酸(高浓度盐酸的质量浓度为36～38％)直到酸液浓度符合要求为止；
f.将步骤e中得到的稠化剂、盐酸溶液添加氯化钾后一起泵入混砂车，注入地层再次用于酸化施工。
g.重复步骤a至步骤f，完成酸液的重复利用。
实施例6：
本实施例结合具体的实施效果进行分析，将实施例1至实施例4所配制的不同比例组分的酸液，利用实施例5所提出的方法进行实施，得到相应的实施效果数据：
首先进行横向比对分析，利用前四个实施例中，可回收速溶稠化酸的组分不同比例配制的实施效果进行分析，分析如下表所示：
Figure PCTCN2015078533-appb-000001
由上表的数据显示可以看出，实施例2中的比例是最佳比例，实施例2的配制实验效果，相较于其他三个实施例，其粘度值较大，增稠时间较短，耐温能力相对较强，因此采用这种配制比例下的可回收速溶稠化酸进行酸化的时候，能取得更好的酸化效果，重复使用率高，效果好。
本实施例中还可以进行纵向比例分析，利用原始酸液(即在步骤a中使用的酸液)与残酸液(即在步骤e中得到的酸液)进行耐温曲线和粘度值的对比分析，结果如图1和图2所示，图1为原始酸液的耐温能力T和粘度值η随时间的变化而变化的曲线图，图2为残酸液的耐温能力T和粘度值η随时间的变化而变化的曲线图，结合图1和图2进行对比可知，残酸液与原始酸液相比，耐温能力、粘度值有所下降，但是差别不是很大，如果能在耐温能力、粘度值下降的时候补充一定量的高浓度的元组分，在效果上，能得到相似的效果，因此，本发明的残酸液也能被用作酸化作业，由此可得，本发明的这种可回收速溶稠化酸，能利用酸液进行反复酸化作业，地面无残夜排放，降低了地表污染；而且返排液可重复利用，降低了施工作业成本。本发明可实现酸化后返排液的“零排放”，且重复利用降低了稠化酸综合成本，规模化推广应用后可大幅降低稠化酸环境污染问题。
以上例举仅仅是对本发明的举例说明，并不构成对本发明的保护范围的限制，凡是与本发明相同或相似的设计均属于本发明的保护范围之内。

Claims (4)

  1. 一种可回收速溶稠化酸，其特征在于：它是由以下组分按如下质量组分比例配制而成：
    稠化剂：1.5份～3份；
    氯化钾：0.5份～3份；
    盐酸溶液：100份。
  2. 根据权利要求1所述的一种可回收速溶稠化酸，其特征在于：所述的稠化剂是由质量比为40％～70％N-月桂酰基-N’-羟乙基-N’-羧丙基乙二胺丙酸盐或其衍生物、4～12％乙醇和18～56％水组成的混合物。
  3. 根据权利要求1所述的一种可回收速溶稠化酸，其特征在于：所述的盐酸溶液的质量浓度为15～30％。
  4. 根据权利要求1或2或3所述的一种可回收速溶稠化酸，其特征在于：所述的可回收速溶稠化酸增稠时间小于30s，在地面常温条件下，粘度至少为60mPa·s；当地层温度大于105℃时，粘度≤15mPa·s；120℃时，粘度≤5mPa·s。
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