CN1206307C - 无伤害压裂液 - Google Patents
无伤害压裂液 Download PDFInfo
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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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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
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%。
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CN 03110938 CN1206307C (zh) | 2003-01-24 | 2003-01-24 | 无伤害压裂液 |
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CN 03110938 CN1206307C (zh) | 2003-01-24 | 2003-01-24 | 无伤害压裂液 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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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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