CN103573238A - 一种生物酶降解油井压裂液的方法 - Google Patents

一种生物酶降解油井压裂液的方法 Download PDF

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Publication number
CN103573238A
CN103573238A CN201210261820.7A CN201210261820A CN103573238A CN 103573238 A CN103573238 A CN 103573238A CN 201210261820 A CN201210261820 A CN 201210261820A CN 103573238 A CN103573238 A CN 103573238A
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China
Prior art keywords
fracturing fluid
oil well
biological enzyme
degrading
fluid
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CN201210261820.7A
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魏兆言
李边生
王清刚
孙兆旭
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Priority to CN201210261820.7A priority Critical patent/CN103573238A/zh
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Abstract

一种生物酶降解油井压裂液的方法,包括生物酶,其特征是在压裂施工的前置液中,加入浓度为20ppm生物酶。本实发明工艺简单、操作方便、效果可靠,用于油层改造中,无需添加催化剂便可保证温度低于51.7℃的油井压裂液破胶效果,不仅降低作业难度,还可避免造成地层的二次污染。

Description

一种生物酶降解油井压裂液的方法
技术领域:本发明涉及一种油田井下作业工艺技术,特别是用于油层改造的一种生物酶降解油井压裂液的方法。 
背景技术:本发明前,各油田使用的瓜尔胶压裂液破胶剂主要是过硫酸盐,由于该方法当温度低于51.7℃时需添加催化剂解决破胶反应变缓的矛盾,因而不仅增加了低温油井的作业难度,还会造成地层的二次污染。 
发明内容:本发明的目的是:为油田油层改造提供一种生物酶降解油井压裂液的方法,由于该方法是采用低温反应活跃的生物酶做为破胶剂,因而无需添加催化剂便可保证温度低于51.7℃的油井压裂液破胶效果,不仅降低作业难度,还可避免造成地层的二次污染。 
本发明的目的是通过以下措施来实现的:一种生物酶降解油井压裂液的方法,包括生物酶,其特征是在压裂施工的前置液中,加入浓度为20ppm生物酶, 
本发明工艺简单、操作方便、效果可靠,用于油层改造中,无需添加催化剂便可保证温度低于51.7℃的油井压裂液破胶效果,不仅降低作业难度,还可避免造成地层的二次污染。 
具体实施方式:生物酶降解油井压裂液的方法是:当油井压裂施工泵入前置液时,应通过混砂罐上安装的计量装置,向前置液中均匀加入浓度为20ppm生物酶;由于生物酶作用于瓜尔胶分子网状交联的甘露糖β(1-4)-糖苷键后,将其降解成单糖和二糖的反应低温下也较活跃,从而保证了低于51.7℃的油井压裂液的破胶效果。 

Claims (1)

1.一种生物酶降解油井压裂液的方法,包括生物酶,其特征是:在压裂施工的前置液中,加入浓度为20ppm生物酶。
CN201210261820.7A 2012-07-26 2012-07-26 一种生物酶降解油井压裂液的方法 Pending CN103573238A (zh)

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Citations (11)

* Cited by examiner, † Cited by third party
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NO20073442L (no) * 2004-12-08 2007-09-10 Halliburton Energy Serv Inc Framgangsmate for a regulere migrasjon av partikler i en underjordisk formasjon
EP1427910B1 (en) * 2001-09-19 2008-09-03 Baker Hughes Incorporated Chelant compositions for fracturing fluid
CN101838528A (zh) * 2009-03-17 2010-09-22 大连百奥泰科技有限公司 一种环境友好生物可利用绿色压裂液体系
CN101838620A (zh) * 2009-03-17 2010-09-22 大连百奥泰科技有限公司 一株枯草芽孢杆菌和耐碱抗盐的油田压裂用酶及其应用
CN101880523A (zh) * 2010-07-02 2010-11-10 大连百奥泰科技有限公司 酶-微生物偶联压裂液体系及其制备和应用
CN102286275A (zh) * 2011-07-12 2011-12-21 西安石油大学 一种生物酶压裂破胶剂及其应用
CN102383774A (zh) * 2011-07-12 2012-03-21 西安石油大学 一种用于油田油井的生物酶压裂工艺
CN102562021A (zh) * 2012-03-02 2012-07-11 陕西延长石油(集团)有限责任公司研究院 中低温油气井压裂液快速破胶工艺

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437331A (en) * 1994-08-24 1995-08-01 The Western Company Of North America Method for fracturing subterranean formations using controlled release breakers and compositions useful therein
EP0803024A1 (en) * 1995-01-09 1997-10-29 Bj Services Company Method of degrading cellulose-containing fluids during completion operations of oil and gas wells
EP0803024A4 (en) * 1995-01-09 1998-12-09 Bj Services Co METHOD FOR DEGRADING CELLULOSE-CONTAINING FLUIDS DURING COMPLETE WORK IN OIL AND GAS HOLES
EP1427910B1 (en) * 2001-09-19 2008-09-03 Baker Hughes Incorporated Chelant compositions for fracturing fluid
NO20073442L (no) * 2004-12-08 2007-09-10 Halliburton Energy Serv Inc Framgangsmate for a regulere migrasjon av partikler i en underjordisk formasjon
CN1987044A (zh) * 2006-11-16 2007-06-27 大庆油田有限责任公司 水力压裂井破胶剂追加方法
CN101838528A (zh) * 2009-03-17 2010-09-22 大连百奥泰科技有限公司 一种环境友好生物可利用绿色压裂液体系
CN101838620A (zh) * 2009-03-17 2010-09-22 大连百奥泰科技有限公司 一株枯草芽孢杆菌和耐碱抗盐的油田压裂用酶及其应用
CN101880523A (zh) * 2010-07-02 2010-11-10 大连百奥泰科技有限公司 酶-微生物偶联压裂液体系及其制备和应用
CN102286275A (zh) * 2011-07-12 2011-12-21 西安石油大学 一种生物酶压裂破胶剂及其应用
CN102383774A (zh) * 2011-07-12 2012-03-21 西安石油大学 一种用于油田油井的生物酶压裂工艺
CN102562021A (zh) * 2012-03-02 2012-07-11 陕西延长石油(集团)有限责任公司研究院 中低温油气井压裂液快速破胶工艺

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Application publication date: 20140212