CN112175208B - 一种压裂液用聚合物悬浮乳液及其配制方法 - Google Patents

一种压裂液用聚合物悬浮乳液及其配制方法 Download PDF

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CN112175208B
CN112175208B CN202011058758.2A CN202011058758A CN112175208B CN 112175208 B CN112175208 B CN 112175208B CN 202011058758 A CN202011058758 A CN 202011058758A CN 112175208 B CN112175208 B CN 112175208B
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张学文
张学武
宋劲
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Jiangxi Fucheng Eco Environment Science And Technology Group Co ltd
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Abstract

本发明公开了一种压裂液用聚合物悬浮乳液,包括以下重量份的组分:矿物油350~450份、悬浮剂16~20份、聚合物粉剂350~550份、无机钾盐70~80份、烷基醚硫酸铵75~100份,破乳剂35~60份,润湿剂10份。悬浮乳液的配制步骤如下:(1)将矿物油加入生产釜内,开启搅拌,搅拌频率25Hz;(2)将悬浮剂、聚合物粉剂和钾盐依次加入生产釜内;(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min;(4)加入烷基醚硫酸铵、破乳剂和润湿剂,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min,得到压裂液用聚合物悬浮乳液。本发明配制的悬浮乳液具有溶解迅速、抗盐性好、稳定性能好以及低成本的优势,满足连续混配的大排量水力压裂施工技术要求。

Description

一种压裂液用聚合物悬浮乳液及其配制方法
技术领域
本发明涉及油气田开采技术领域,特别涉及一种压裂液用聚合物助剂悬浮乳液及其配制方法。
背景技术
非常规能源页岩气、致密气的开采,需要进行连续混配的大排量水力压裂施工,同时为了节省成本,降低环境损害,会使用现场水和返排水配液,对压裂液聚合物助剂提出了溶解迅速、抗盐性能良好的基本要求。
现在非常规油气资源开采应用的聚丙烯酰胺类助剂主要分为干粉和乳液两种形态,其中粉剂性能更加优越(受聚合工艺影响),乳液使用更加便利(形态)。其中粉剂在配液过程中存在溶解速度慢、计量不便、易产生“鱼眼”和扬尘等问题,无法满足连续混配大排量施工的要求。而乳液从技术和成本层面上不能很好的解决产品的抗盐性问题。在这种情况下,提出一种新的压裂液聚合物助剂剂型,使其同时满足速溶和抗盐的技术要求。
发明内容
本发明的目的是针对现有聚合物粉剂和乳液无法满足连续混配大排量施工要求的问题,提供一种压裂液用聚合物悬浮乳液及其配制方法。该悬浮乳液是一种新的压裂液聚合物助剂剂型,能够同时满足速溶和抗盐的技术要求。
本发明的压裂液用聚合物悬浮乳液,包括以下重量份比例的组分:
矿物油350~450份、悬浮剂16~20份、聚合物粉剂350~550份、无机钾盐70~80份、烷基醚硫酸铵75~100份,破乳剂35~60份,润湿剂10份。所述聚合物粉剂是油田钻井用聚丙烯酰胺类物质,粒径小于0.3mm。
所述悬浮剂是羧甲基纤维素或膨润土,或两者的混合物。
所述破乳剂是聚氧乙烯醚。润湿剂是丙二醇。
一种上述压裂液用聚合物悬浮乳液的配制方法,步骤如下:
(1)将矿物油加入生产釜内,开启釜内搅拌电机,搅拌频率25Hz;
(2)将悬浮剂、聚合物粉剂和无机钾盐依次加入生产釜内;
(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min;
(4)加入烷基醚硫酸铵、破乳剂和润湿剂,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min后关闭,得到压裂液用聚合物悬浮乳液。
优选的是,所述压裂液用聚合物悬浮乳液的配制方法,步骤如下:
(1)将装有矿物油的吨桶放置在吨称上,依次开启出料阀、抽油泵和进料阀,向生产釜内加入矿物油,开启生产釜搅拌电机,搅拌频率25H。
(2)将悬浮剂、聚合物粉剂和无机钾盐依次投入料仓,开启粉料进料阀和输送机,向生产釜内加入粉料。
(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min。
(4)将装有烷基醚硫酸铵的吨桶放置在吨称上,依次开启出料阀、抽油泵和进料阀,向生产釜内加入烷基醚硫酸铵;然后按照加入烷基醚硫酸铵的操作方法,将破乳剂和润湿剂加入生产釜内,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min后关闭,期间准备放料。
(5)将吨桶置于吨称上,开启生产釜底阀、放料口流量控制阀,将釜内悬浮乳液放入吨桶,每桶净重1000公斤。
(6)关闭生产釜搅拌电机,清洗设备、管线和现场卫生。
上述的悬浮乳液的工作原理:选择高性能的聚合物干粉,高品质的粉剂相对乳液工艺技术成熟、成本可控,磨粉至60目以上,减小粉剂粒径,增加其表面积和水化速度,提高溶解性。选择矿物油,通过加入悬浮剂增加矿物油粘度,增强悬浮性。无机钾盐与表面活性剂烷基醚硫酸铵使粉剂在油相中均匀分散,通过增稠、分散作用,使粉剂能够以悬浮状态稳定存在于油相中,并通过循环设备和操作使物料混合分散均匀。选择破乳剂和润湿剂可以提高使用时,提高粉剂的破乳速度和亲水性,增强溶解性,进一步提高产品的溶解速度。
与现有技术相比,本发明的有益之处在于:
(1)本发明配制的压裂液用聚合物悬浮乳液同时具有溶解迅速、抗盐性好、分散均匀,稳定性能好,流动性好以及低成本的优势,满足连续混配的大排量水力压裂施工技术要求,现场使用方便。
(2)可根据不同使用要求灵活调整粉剂的选型,调整浓度配制范围,使产品具有一体化可交联乳液的特点。
(3)悬浮乳液具有长期稳定性,2~6个月稳定剂,且稳定性可调和防冻性能良好(-20℃以上,流动性能不受影响)的特点,以适应室外低温使用。
(4)工艺设备和配制操作简单,生产成本低,过程安全环保风险低。
另外,本发明的悬浮乳液具有以下特点:第一、聚合物粉剂与油相乳化后,使用时水溶性不受影响;第二、粒径0.3mm以下的聚合物粉剂颗粒物也可以均匀稳定分散悬浮;第三、悬浮乳液中各物质分散均匀,无沉淀、无粘接成团、成块现象。
本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明
图1、实施例1的悬浮乳液稳定性测试。
图2、清水条件下悬浮乳液减阻效果测试。
图3、盐水条件下悬浮乳液减阻效果测试。
图4、悬浮乳液交联悬砂性能测试结果图。
具体实施方式
以下结合附图对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。
实施例1
一种压裂液用聚合物悬浮乳液,包括如以下重量份比例的组分:
矿物油350份、羧甲基纤维素20份、油田钻井用聚丙烯酰胺粉剂550份、氯化钾70份、十二烷基醚硫酸铵75份、聚氧乙烯醚60份、丙二醇10份。
配制工艺方法如下:
(1)将装有矿物油的吨桶放置在吨称上,依次开启出料阀、抽油泵和进料阀,按工艺规定往生产釜内加入矿物油,开启生产釜搅拌电机,搅拌频率25Hz。
(2)将称量好的羧甲基纤维素、聚丙烯酰胺粉剂和氯化钾等粉料依次投入料仓,开启粉料进料阀和输送机,往生产釜内加入粉料。
(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min。
(4)按步骤(1)的操作方法将烷基醚硫酸铵、聚氧乙烯醚、丙二醇等液体原料加入生产釜,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min后关闭,期间准备放料。
(5)将吨桶置于吨称上,开启釜底阀、放料口流量控制阀,将产品放入吨桶,每桶净重1000公斤。
(6)生产结束,关闭生产釜搅拌电机,清洗设备、管线和现场卫生。
实施例2
一种压裂液用聚合物悬浮乳液,包括如以下重量份比例的组分:
矿物油450份、膨润土16份、油田钻井用聚丙烯酰胺粉剂350份、无机钾盐80份、十二烷基醚硫酸铵100份、聚氧乙烯醚35~60份、丙二醇10份。
配制方法同实施例1。
实施例3
一种压裂液用聚合物悬浮乳液,包括如以下重量份比例的组分:
矿物油400份、羧甲基纤维素和膨润土等质量比的混合物18份、油田钻井用聚丙烯酰胺粉剂450份、无机钾盐75份、十六烷基醚硫酸铵90份、聚氧乙烯醚50份、丙二醇10份。
配制方法同实施例1。
性能测试:
采用以下检测方法对实施例1制备的悬浮乳液进行性能测试:
(1)溶解性测试:用标准盐水配制悬浮乳液质量百分浓度0.6%的溶液,3.3万盐水,钙镁离子含量3000ppm,混调器转速以600rpm搅拌每隔1min使用六速旋转粘度计测一次粘度,3min时的粘度与10min后粘度相比,测试结果是:3min盐水粘度16.5mPa·s,10min盐水粘度18mPa·s,16.5/18=91.67%,大于90%。
(2)稳定性测试:静置2~6个月,观察悬浮乳液产品是否出现,分层≤5%视为合格。实施例1的悬浮乳液成品放置6个月的外观形貌见图1,图中左边样品是刚配制而成的悬浮乳液,右边样品是放置6个月后的相同配方的样品,可以看出,实施例1的悬浮乳液放置6个月后依然稳定无分层,与刚配制的悬浮乳液外观无差异,体现出良好的稳定性。
(3)抗冻性测试:将悬浮乳液成品至于-20℃环境下,静置4h,测试其前后流动性是否收到影响。采用布什粘度计,25℃,以3rpm测试。测试结果见表1。室温放置时,悬浮乳液粘度636mPa·s,流动性良好。-20℃放置4h后,体系粘度642mPa·s,流动性良好。
(4)减阻率测试:使用压裂液管路摩阻仪测试。测试结果见图2和图3。图2是将悬浮乳液用清水配制成质量百分浓度0.05%的溶液,10mm管径,排量35L/min,常温下减阻率(%)测试结果。最大降阻率是77%,最大降阻率保持时间140s,达到最大降阻率所需时间98s,结束时间降阻率76%。图3是将悬浮乳液用盐水配制成质量百分浓度0.05%的溶液,10mm管径,排量35L/min,常温下减阻率(%)测试结果。最大降阻率是77%,最大降阻率保持时间190s,达到最大降阻率所需时间106s,结束时间降阻率74%。
(5)悬砂性能测试性能如图4所示,可交联,悬砂效果好。
综上所述,本发明提供了一种新的压裂液聚合物助剂剂型,即聚合物悬浮乳液,其同时具有溶解迅速、抗盐性好、稳定性能好以及低成本的优势,满足连续混配的大排量水力压裂施工技术要求。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。

Claims (4)

1.一种压裂液用聚合物悬浮乳液,其特征在于,包括以下重量份比例的组分:
矿物油350~450份、悬浮剂16~20份、聚合物粉剂350~550份、无机钾盐70~80份、烷基醚硫酸铵75~100份,破乳剂聚氧乙烯醚35~60份,润湿剂丙二醇10份;所述聚合物粉剂的粒径小于0.3mm;
所述悬浮剂是羧甲基纤维素或膨润土,或两者的混合物。
2.如权利要求1所述的压裂液用聚合物助剂悬浮乳液,其特征在于,所述聚合物粉剂是聚丙烯酰胺类物质。
3.一种如权利要求1或2所述的压裂液用聚合物悬浮乳液的配制方法,其特征在于,步骤如下:
(1)将矿物油加入生产釜内,开启釜内搅拌电机,搅拌频率25Hz;
(2)将悬浮剂、聚合物粉剂和无机钾盐依次加入生产釜内;
(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min;
(4)加入烷基醚硫酸铵、破乳剂和润湿剂,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min后关闭,得到压裂液用聚合物悬浮乳液。
4.如权利要求3所述的压裂液用聚合物悬浮乳液的配制方法,其特征在于,步骤如下:
(1)将装有矿物油的吨桶放置在吨称上,依次开启出料阀、抽油泵和进料阀,向生产釜内加入矿物油,开启生产釜搅拌电机,搅拌频率25H;
(2)将悬浮剂、聚合物粉剂和无机钾盐依次投入料仓,开启粉料进料阀和输送机,向生产釜内加入粉料;
(3)调节搅拌频率至35Hz,开启生产釜循环阀门,启动一级循环泵,将物料循环搅拌30min;
(4)将装有烷基醚硫酸铵的吨桶放置在吨称上,依次开启出料阀、抽油泵和进料阀,向生产釜内加入烷基醚硫酸铵;然后按照加入烷基醚硫酸铵的操作方法,将破乳剂和润湿剂加入生产釜内,关闭一级循环泵,启动二级循环泵,继续循环搅拌30min后关闭,得到压裂液用聚合物悬浮乳液。
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