CN116144337A - 一种水基速溶悬浮减阻剂及其制备方法 - Google Patents
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Abstract
本发明公开了一种水基速溶悬浮减阻剂及其制备方法,所述悬浮减阻剂由20~30%分相剂、20~30%阳离子疏水缔合聚合物、3~5%分散剂、35~57%的水组成。其中疏水缔合聚合物的制备包括以下步骤:丙烯酰胺、阳离子单体甲基丙烯酰氧乙基三甲基氯化铵以及疏水单体N,N‑二甲基十八烷基烯丙基氯化铵按照(89~94.7):(5~10):(0.3~1)比例加入到去离子水中,在通氮气的条件下,加入引发剂0.05~0.2%的引发剂V50,在50℃下反应6h后,分离、烘干、粉碎即得到疏水缔合聚合物减阻剂粉剂。水基速溶悬浮减阻剂的制备方法包括以下步骤:将PEG和分散剂分别溶于水中,然后在搅拌情况下缓慢加入疏水缔合聚合物粉末,即得到水基悬浮减阻剂。本发明的水基速溶悬浮减阻剂完全不含油相,可以大幅降低环境污染,同时集减阻、助排、防膨于一体,在页岩油气压裂方面具有广阔的应用前景。
Description
技术领域
本发明涉及油田化学品技术领域,具体涉及一种水基速溶悬浮减阻剂及其制备方法。
背景技术
一体化滑溜水压裂液目前还鲜有报道,其主要是集减阻、携砂、助排、防膨等于一剂的多功能滑溜水压裂液体系,该一体化滑溜水压裂液可以用于解决常规滑溜水压裂液需要添加减阻剂、助排剂、防膨剂等多种添加剂而使得现场施工操作复杂、成本过高、工作量过大等一系列问题。主要原理是在减阻剂合成过程当中加入阳离子单体以及表面活性剂单体,形成富含阴离子、非离子以及阳离子多种活性基团的超分子聚合物结构,该聚合物水溶液黏度较高,且减阻性能优异,同时还具备耐盐、助排以及防膨等作用,真正形成一种一体化滑溜水压裂液体系,可大大提高施工效率以及油气开发的经济效益。该类聚合物减阻剂主要通过超分子减阻理论以及自交联变黏携砂理论进行减阻以及携砂,带有多种活性基团的高分子聚合物,在达到其临界缔合浓度点前后可以通过聚合物分子的聚集形成高次胶束结构,提高其减阻性能。通过分子间的缔合作用以及阴阳离子对的作用使得聚合物分子之间可以发生物理交联,从而进一步提高聚合物的黏度,增强滑溜水压裂液的携砂能力。
滑溜水压裂液常用的减阻剂大多数耐盐性能差、溶解速率慢的问题,在合成减阻剂过程中加入耐盐单体以及长碳链的疏水单体合成耐盐型疏水缔合聚合物减阻剂来解决减阻剂不耐盐的问题,耐盐单体可以让减阻剂溶液在高矿化度下仍然保持较高的黏度甚至黏度还能有所上升,疏水单体可以通过让减阻剂分子间、分子内发生疏水缔合作用形成空间网状结构来提高滑溜水压裂液的耐盐性能。并且还能够直接用返排液进行滑溜水压裂液的配液,使得返排液可以重复利用,降低成本。进一步的地,采用具有一定黏度的分相剂水溶液作为连续相构建一种水基速溶悬浮减阻剂,使得疏水缔合聚合物减阻剂粉剂在连续相中吸水溶胀,但是没有溶解,从而提高其溶解速率,让其可以达到速溶的效果。
发明内容
滑溜水添加剂种类繁多,工作量大,成本较高。在减阻剂合成的时候,引入阳离子单体以及表面活性剂单体,因此最终制备的聚合物减阻剂相当于一种阳离子聚合物,具备一定的防膨性能,表面活性剂单体可以提供一定的表界面活性,从而降低滑溜水压裂液的表界面张力,达到助排的效果。通过将数剂并为一剂,形成一种一体化滑溜水压裂液,无需添加防膨剂、助排剂等,且能集减阻、携砂、助排、防膨等于一体。
本发明采用下述的技术方案:
一种水基速溶悬浮减阻剂,所述悬浮减阻剂由20~30%分相剂、20~30%阳离子疏水缔合聚合物、3~5%分散剂、35~57%的水组成。
进一步地,所述分相剂为PEG2000、PEG4000、PEG8000、PEG10000及PEG20000中的至少一种。优选为:PEG10000。
进一步地,所述的分散剂为Tween20、Tween40、Tween60、Tween80、OP-10中的至少一种。优选为:Tween80。
进一步地,所述的阳离子疏水缔合聚合物的结构式如下所示:
其中,x、y、z为单体摩尔比,x﹢y﹢z=1。
进一步地,所述一种疏水缔合聚合物减阻剂,其制备包括以下步骤:丙烯酰胺、阳离子单体甲基丙烯酰氧乙基三甲基氯化铵以及疏水单体N,N-二甲基十八烷基烯丙基氯化铵按照(89~94.7):(5~10):(0.3~1)比例加入到去离子水中,在通氮气的条件下,加入引发剂0.05~0.2%的引发剂V50,在50℃下反应6h后,分离、烘干、粉碎即得到疏水缔合聚合物减阻剂粉剂。
进一步地,所述水基悬浮减阻剂的制备方法包括以下步骤:将PEG和分散剂分别溶于水中,然后在搅拌情况下缓慢加入疏水缔合聚合物粉末,即得到水基悬浮减阻剂。
本发明公开了在疏水缔合聚合物减阻剂合成过程中引入抗盐单体来提高滑溜水的耐盐性能,让其可以满足不同储层特性的施工,以及分别引入阳离子单体和疏水单体即表面活性剂单体,使得聚合物减阻剂集减阻、携砂、助排、防膨于一体。
本发明公开了的水基速溶悬浮减阻剂其最大的优点就是完全不含油相,可以在很大程度上减少油相污染的问题,解决了现有的减阻剂注入地层后会造成地下水的污染,无法满足环保要求及地下返排等问题。
本发明还公开了水基速溶悬浮减阻剂的制备方法其制备方法简单,易于推广使用。
具体实施方式
实施例1
本实施例制备一种水基速溶悬浮减阻剂,其配方为:20%的分相剂(PEG10000)、3%的分散剂(Tween80)、20%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取20%的分相剂(PEG10000)、3%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将20%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂A。
实施例2
本实施例制备一种水基速溶悬浮减阻剂,其配方为:25%的分相剂(PEG10000)、4%的分散剂(Tween80)、25%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取25%的分相剂(PEG10000)、4%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将25%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂B。
实施例3
本实施例制备一种水基速溶悬浮减阻剂,其配方为:30%的分相剂(PEG10000)、5%的分散剂(Tween80)、30%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取30%的分相剂(PEG10000)、5%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将30%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂C。
实施例4
本实施例制备一种水基速溶悬浮减阻剂,其配方为:30%的分相剂(PEG10000)、3%的分散剂(Tween80)、20%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取30%的分相剂(PEG10000)、3%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将20%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂D。
实施例5
本实施例制备一种水基速溶悬浮减阻剂,其配方为:30%的分相剂(PEG10000)、4%的分散剂(Tween80)、20%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取30%的分相剂(PEG10000)、4%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将20%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂E。
实施例6
本实施例制备一种水基速溶悬浮减阻剂,其配方为:30%的分相剂(PEG10000)、5%的分散剂(Tween80)、20%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取30%的分相剂(PEG10000)、5%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将20%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂F。
实施例7
本实施例制备一种水基速溶悬浮减阻剂,其配方为:30%的分相剂(PEG10000)、5%的分散剂(Tween80)、25%的疏水缔合聚合物,余量为水。
其具体制备方法为:
按配比称取30%的分相剂(PEG10000)、5%的分散剂(Tween80)溶液作为水基悬浮液的连续相,然后在高速搅拌条件下将25%的疏水缔合聚合物粉末分散到溶液中,即可得到水基速溶悬浮减阻剂G。
对实施例1~7得到的产物分别测试其在清水中的减阻率,其测试结果如下表:
从表中可以看出,本申请得到的水基速溶悬浮减阻剂减阻率最高可达79.75%,相较于常规用减阻剂的减阻性能更好,由此可见,本申请得到的水基速溶悬浮减阻剂分散稳定性和悬浮稳定性的性能更佳,减阻性能更好。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和方案的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
1.一种水基速溶悬浮减阻剂,其特征在于,所述悬浮减阻剂由20~30%分相剂、20~30%阳离子疏水缔合聚合物、3~5%分散剂、35~57%的水组成。
2.如权利要求1所述一种水基速溶悬浮减阻剂,其特征在于,所述分相剂为PEG2000、PEG4000、PEG8000、PEG10000及PEG20000中的至少一种。
3.如权利要求1所述的一种水基速溶悬浮减阻剂,其特征在于,所述的分散剂为Tween20、Tween40、Tween60、Tween80、OP-10中的至少一种。
5.如权利要求4所述一种疏水缔合聚合物减阻剂,其制备包括以下步骤:丙烯酰胺、阳离子单体甲基丙烯酰氧乙基三甲基氯化铵以及疏水单体N,N-二甲基十八烷基烯丙基氯化铵按照(89~94.7):(5~10):(0.3~1)比例加入到去离子水中,在通氮气的条件下,加入引发剂0.05~0.2%的引发剂V50,在50℃下反应6h后,分离、烘干、粉碎即得到疏水缔合聚合物减阻剂粉剂。
6.如权利要求1所述的一种水基速溶悬浮减阻剂,其特征在于所述水基悬浮减阻剂的制备方法包括以下步骤:将PEG和分散剂分别溶于水中,然后在搅拌情况下缓慢加入疏水缔合聚合物粉末,即得到水基悬浮减阻剂。
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