CN104212435A - 一种压裂用复合稠化剂 - Google Patents
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Abstract
本发明涉及一种压裂用复合稠化剂;该复合稠化剂由50~70%海藻胶、10~20%协同增粘剂、10~20%助溶剂和5~10%减阻剂,该复合稠化剂具有良好的水溶性,溶胀时间10-45分钟,按0.3%用量配制的压裂液基液在常温、170S-1条件下使用六速旋转粘度计测得粘度值为15~33mPa.s,降阻率为59~68%,支撑剂静态沉降速率为0.5~3.5cm/s,满足混合水压裂的技术要求,更为重要的是,该稠化剂原材料全部实现国产,产量价格稳定,在胍胶价格大幅波动的情况下,降本和抑制效果明显。
Description
技术领域
本发明涉及油田油水井增产技术领域,特别涉及一种压裂用复合稠化剂。
背景技术
水力压裂是低渗透油气田有效开发的主要措施,近年来由于体积压裂理念的成功运用,国内外就此展开了深入的研究,取得了一系列技术进步,其中混合水压裂技术就是其中一种。该技术主要经历了4个发展历程:上世纪80年代以清水压裂为主;上世纪90年代过渡为滑溜水压裂;本世纪初,发展成为混合水压裂;目前主要采用水平井多段+混合水压裂技术。其中混合水压裂技术主要针对天然裂缝发育、岩石脆性指数高的致密储层,通过采用“大液量、大砂量、高排量、低砂比”及滑溜水与冻胶交替注入,提高裂缝导流能力,开启天然裂缝并进行有效支撑,形成网状缝,扩大泄流体积。
该技术所需要的滑溜水和基液虽然稠化剂浓度低,但所需总量往往是普通压裂工艺的数倍,造成稠化剂用量大,在目前国际胍胶期货价格高涨的环境下,给油田低成本开发增加了额外的材料成本。
发明内容
本发明的目的是提供一种压裂用复合稠化剂,用于低渗透油气藏的加砂压裂改造,能够有效地降低开发成本。
本发明所述的压裂用复合稠化剂,由以下组成按重量100%混合而成:
其中:
海藻胶为体系主要组成成份,用于提高稠化剂的增粘性能,有很多厂家生产该产品,如:青岛福华海藻有限公司、青岛明月海藻集团有限公司等。
协同增粘剂为黄原胶,用于与海藻胶互相缠绕,协同增粘,保证基液在低剪切速率下保持较高的表观粘度,提高携砂性能,有很多厂家生产该产品,如:河南中尚生物科技有限公司、山东阜丰发酵有限公司等。
助溶剂为氨基三甲叉膦酸、羟基乙叉二膦酸、乙二胺四甲叉膦酸、二乙烯三胺五甲叉膦酸、2-膦酸丁烷-1,2,4-三羧酸、双1,6-亚己基三胺五甲叉膦酸、多氨基多醚基甲叉膦酸、己二胺四甲叉膦酸或2-羟基膦酸基乙酸,用于促进海藻胶分散溶解。
稳定剂为多元醇磷酸酯、聚丙烯酸、聚环氧琥珀酸或聚天冬氨酸,用于促使基液粘度均匀,并且保持稳定。
减阻剂为聚乙二醇(分子量)或聚丙烯酰胺(分子量:800万以上),用于降低基液摩阻,降低高排量下的施工压力。
本发明的有益效果:
本发明所述的压裂用复合稠化剂,按0.3%用量配制的压裂液基液在常温、170S-1条件下使用六速旋转粘度计测得粘度值为18mPa.s,降阻率为68%,支撑剂静态沉降速率为1.1cm/s,相比同样浓度的胍胶基液,各项指标全部领先,现场试验也已经证明该稠化剂具有良好的适应性,更为重要的是,该稠化剂原材料全部实现国产,产量价格稳定,在胍胶价格大幅波动的情况下,降本和抑制效果明显。
具体实施方式
实施例1
按以下组成和比例混合值的1#稠化剂:
采用混调器按照0.15%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:15分钟;
表观粘度(常温、170S-1):9mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:3.3cm/s。
采用混调器按照0.5%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:35分钟;
表观粘度(常温、170S-1):54mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:0.9cm/s。实施例2
按以下组成和比例混合值的1#稠化剂:
采用混调器按照0.15%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:12分钟;
表观粘度(常温、170S-1):7.5mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:3.5cm/s。
采用混调器按照0.5%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:30分钟;
表观粘度(常温、170S-1):42mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:1.1cm/s。实施例3
按以下组成和比例混合值的1#稠化剂:
采用混调器按照0.15%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:20分钟;
表观粘度(常温、170S-1):10.5mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:2.9cm/s。
采用混调器按照0.5%配制上述稠化剂溶液,使用六速旋转粘度计测定粘度,各项指标如下:
完全溶胀时间:40分钟;
表观粘度(常温、170S-1):52.5mPa.s;
支撑剂(20/40目陶粒,颗粒密度:3.1g/cm3)静态沉降速率:0.7cm/s。
Claims (5)
1.一种压裂用复合稠化剂,其特征在于:由以下组成按重量100%混合而成:
2.根据权利要求1所述的压裂用复合稠化剂,其特征在于:协同增粘剂为黄原胶。
3.根据权利要求1所述的压裂用复合稠化剂,其特征在于:助溶剂为氨基三甲叉膦酸、羟基乙叉二膦酸、乙二胺四甲叉膦酸、二乙烯三胺五甲叉膦酸、2-膦酸丁烷-1,2,4-三羧酸、双1,6-亚己基三胺五甲叉膦酸、多氨基多醚基甲叉膦酸、己二胺四甲叉膦酸或2-羟基膦酸基乙酸。
4.根据权利要求1所述的压裂用复合稠化剂,其特征在于:稳定剂为多元醇磷酸酯、聚丙烯酸、聚环氧琥珀酸或聚天冬氨酸。
5.根据权利要求1所述的压裂用复合稠化剂,其特征在于:减阻剂为聚乙二醇或聚丙烯酰胺。
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Cited By (9)
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CN104564007A (zh) * | 2014-12-30 | 2015-04-29 | 中国石油天然气股份有限公司 | 非裂缝性致密砂泥岩储层直井缝网压裂工艺 |
CN104877659A (zh) * | 2015-04-29 | 2015-09-02 | 北京锦世嘉源科技发展有限公司 | 一种水基压裂用复合糖基稠化剂和压裂液 |
CN106497537A (zh) * | 2016-10-25 | 2017-03-15 | 长江大学 | 一种同时具有减阻和携砂性能的“二合一”水力压裂用液体体系 |
CN107267133A (zh) * | 2017-06-07 | 2017-10-20 | 常州苏通海平机电科技有限公司 | 一种复合压裂液稠化剂及其制备方法 |
CN107739601A (zh) * | 2017-10-24 | 2018-02-27 | 大连智讯科技有限公司 | 一种高分子压裂液降阻剂及其制备方法 |
CN108753273A (zh) * | 2018-06-21 | 2018-11-06 | 山东禹王生态食业有限公司 | 一种改性水溶性膳食纤维增稠剂及其制备方法 |
CN110295036A (zh) * | 2019-06-14 | 2019-10-01 | 中国石油天然气股份有限公司 | 一种中高温致密储层用滑溜水压裂液及其制备方法 |
CN111394085A (zh) * | 2020-04-20 | 2020-07-10 | 成都劳恩普斯科技有限公司 | 一种高含量水性降阻剂及其制备方法 |
CN111592869A (zh) * | 2020-04-20 | 2020-08-28 | 成都劳恩普斯科技有限公司 | 一种水性降阻剂及其制备方法 |
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