CN1206307C - 无伤害压裂液 - Google Patents

无伤害压裂液 Download PDF

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CN1206307C
CN1206307C CN 03110938 CN03110938A CN1206307C CN 1206307 C CN1206307 C CN 1206307C CN 03110938 CN03110938 CN 03110938 CN 03110938 A CN03110938 A CN 03110938A CN 1206307 C CN1206307 C CN 1206307C
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fracturing
accounts
fracturing fluid
harmless
trimethyl ammonium
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CN1439691A (zh
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王新纯
王世贵
夏宏
王凤和
张国良
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Daqing Oilfield Co Ltd
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Daqing Oilfield Co Ltd
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Abstract

无伤害压裂液，它涉及油田用无伤害压裂液的组合物。目前在压裂中使用的多种压裂液均为植物胶水基压裂液，在生产和使用时存在一定的缺点，如在配制时需要充分溶胀；而且压裂液中添加剂数量多达13种，配方复杂；根据压裂作业进行的分析显示，泵入的聚合物平均返排只有35%-45%，大量的聚合物残余物滞留在裂缝中，其中所含的不溶物会给地层造成一定伤害；压裂液对地层的伤害大，且是长期的。本发明由主剂十六烷基三甲基溴化胺、助剂水杨酸钠和水配制而成，按重量百分比，十六烷基三甲基溴化胺占0.1%-4%，水杨酸钠占0.1%-1%，水占95%-99.8%。本发明具有配方简单，成本低廉，对地层岩心渗透率伤害小，岩心渗透率恢复率高，无残留，易返排的优点。

Description

无伤害压裂液
技术领域：本发明涉及油田用无伤害压裂液的组合物。
背景技术：油田采用压裂以提高产能是通过改善油、气储层与近井地带的油层渗透率来实现的。目前在压裂中使用的多种压裂液均为植物胶水基压裂液，在生产和使用时存在一定的缺点，如在配制时需要充分溶胀；而且压裂液中添加剂数量多达13种，配方复杂；根据美国150次水力压裂作业进行的分析显示，泵入的聚合物平均返排只有35％-45％，大量的聚合物残余物滞留在裂缝中，其中所含的不溶物会给地层造成一定伤害；压裂液对地层的伤害大，且是长期的；普通压裂液只能剪切稀释、降低或撤消外力，粘度是不可恢复的。
发明内容：本发明的目的在于提供一种无伤害压裂液，它应具有配方简单、成本低廉，对地层岩心渗透率伤害小，岩心渗透率恢复率高，无残留、易返排的特点。本发明由主剂十六烷基三甲基溴化胺、助剂水杨酸钠和水配制而成，按重量百分比，十六烷基三甲基溴化胺占0.1％-4％，水杨酸钠占0.1％-1％，水占95％-99.8％。将上述组份按常规方法混合搅拌均匀即可。本发明岩心渗透率恢复率可达95％，使用RV20粘度计170S-1的剪切速率剪切1小时粘度大于60MPa.S，压裂液的滤失系数都在10-4数量级，滤失量小，破胶后的粘度小于10MPa.S，破胶后的残渣为0。无伤害压裂液对渗透率的伤害率小于10％，井下温度在100℃以内都可以使用。本发明具有配方简单，成本低廉，对地层岩心渗透率伤害小，岩心渗透率恢复率高，无残留，易返排的优点。
具体实施方式一：本实施方式由主剂十六烷基三甲基溴化胺、助剂水杨酸钠和水配制而成，按重量百分比，十六烷基三甲基溴化胺占0.1％-4％，水杨酸钠占0.1％-1％，水占95％-99.8％。将上述各组份按常规方法混合搅拌均匀即可。
具体实施方式二：本实施方式中井下温度在45℃以内时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占0.7％、水杨酸钠占0.7％，水占98.6％。
具体实施方式三：本实施方式中井下温度在50℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占0.8％、水杨酸钠占0.9％，水占98.3％。
具体实施方式四：本实施方式中井下温度在60℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占1.2％、水杨酸钠占0.8％，水占98％。
具体实施方式五：本实施方式中井下温度在70℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占1.8％、水杨酸钠占0.7％，水占97.5％。

Claims (5)

1、无伤害压裂液，其特征在于它由主剂十六烷基三甲基溴化胺、助剂水杨酸钠和水配制而成，按重量百分比，十六烷基三甲基溴化胺占0.1％-4％，水杨酸钠占0.1％-1％，水占95％-99.8％。
2、根据权利要求1所述的无伤害压裂液，其特征在于井下温度在45℃以内时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占0.7％、水杨酸钠占0.7％，水占98.6％。
3、根据权利要求1所述的无伤害压裂液，其特征在于井下温度在50℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占0.8％、水杨酸钠占0.9％，水占98.3％。
4、根据权利要求1所述的无伤害压裂液，其特征在于井下温度在60℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占1.2％、水杨酸钠占0.8％，水占98％。
5、根据权利要求1所述的无伤害压裂液，其特征在于井下温度在70℃时，无伤害压裂液所含各组份的最佳重量配比是：十六烷基三甲基溴化胺占1.8％、水杨酸钠占0.7％，水占97.5％。
CN 03110938 2003-01-24 2003-01-24 无伤害压裂液 Expired - Lifetime CN1206307C (zh)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1313563C (zh) * 2004-09-23 2007-05-02 中国石油天然气股份有限公司 一种清洁压裂液添加剂的组成和压裂地层的方法
CN101481608B (zh) * 2009-01-19 2011-08-10 中国石油大学(华东) 清洁压裂液及其应用
CN103881688A (zh) * 2014-03-12 2014-06-25 中国石油天然气股份有限公司 一种油田油井低伤害清洁压裂液及其应用
CN104046337B (zh) * 2014-06-18 2016-06-29 中国石油集团渤海钻探工程有限公司 一种用于煤层气多分支水平井储层的清洁钻井液及其制备方法
CN105505370A (zh) * 2014-09-23 2016-04-20 中国石油化工股份有限公司 一种清洁压裂液及其制备方法
CN105885817A (zh) * 2016-04-29 2016-08-24 西北大学 一种清洁压裂液破胶剂及其压裂液在低渗-超低渗透油气藏中的应用

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