CN112011323A - 一种采油用调剖剂纤维素醚类的制备方法 - Google Patents

一种采油用调剖剂纤维素醚类的制备方法 Download PDF

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CN112011323A
CN112011323A CN202011010012.4A CN202011010012A CN112011323A CN 112011323 A CN112011323 A CN 112011323A CN 202011010012 A CN202011010012 A CN 202011010012A CN 112011323 A CN112011323 A CN 112011323A
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才力
金秋
檀馨悦
王楚媛
张雨萌
宫丽艳
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Panjin Tianchengyuan Technology Co Ltd
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Abstract

本发明公开了一种采油用调剖剂纤维素醚类的制备方法,包括以下步骤:S1、准备甲基纤维素醚、聚丙烯酰胺、树脂、热稳定剂和有机纤维颗粒;S2、将上述甲基纤维素醚、聚丙烯酰胺、树脂和热稳定剂加入水中进行混合,并搅拌20min,保证各种原料充分溶解;S3、上述混合物体系中含有多种官能团,如羟基、羧基、甲氧基、双键、醚键、硅氧键和芳香基,该体系收入这些基团后,易于发生反应生成交联的体型网状结构,分子链上引入硅氧键、芳香基和醚键后,能提高体系的耐温性,聚合物可以与羟基、甲氧基形成交叉网状结构。本发明的稠油注汽井的调剖封窜成功率明显提高,同时增油效果也明显得到提高,该产品也适合150~200℃油井堵水,增大了适用范围。

Description

一种采油用调剖剂纤维素醚类的制备方法
技术领域
本发明涉及油田开采技术领域,尤其涉及一种采油用调剖剂纤维素醚类的制备方法。
背景技术
稠油注汽开采已经开发到中后期,比较大的汽窜通道已经形成,调剖封窜是稠油注汽开采的主要措施之一,是提高稠油注气井采收率的技术保障。
现有调剖剂的聚丙烯酰胺类凝胶耐温都小于150℃,通过往调剖剂中填充耐温达到300℃的固相颗粒后,使调剖体系耐温达到300℃。在注汽过程中,油层汽窜通道温度一般超过150℃,聚合物凝胶部分快速水化,只能靠固相颗粒部分进行调剖封窜,注汽时,特别容易注窜,达不到调剖封窜的预期效果,为此我们提出了一种采油用调剖剂纤维素醚类的制备方法。
发明内容
本发明的目的是为了解决现有技术中存在的缺点,而提出的一种采油用调剖剂纤维素醚类的制备方法。
为了实现上述目的,本发明采用了如下技术方案:
一种采油用调剖剂纤维素醚类的制备方法,包括以下步骤:
S1、准备甲基纤维素醚、聚丙烯酰胺、树脂、热稳定剂和有机纤维颗粒;
S2、将上述甲基纤维素醚、聚丙烯酰胺、树脂和热稳定剂加入水中进行混合,并搅拌20min,保证各种原料充分溶解;
S3、上述混合物体系中含有多种官能团,如羟基、羧基、甲氧基、双键、醚键、硅氧键和芳香基,该体系收入这些基团后,易于发生反应生成交联的体型网状结构,分子链上引入硅氧键、芳香基和醚键后,能提高体系的耐温性,聚合物可以与羟基、甲氧基形成交叉网状结构,使生成的三维空间网状更加致密,最终反应产生聚合物凝胶体,其中聚合物凝胶部分耐温达到200℃;
S4、通过往调剖剂中填充耐温达到300℃的有机纤维颗粒后,进行充分混合搅拌,使有机纤维颗粒分散到溶液中,能进一步提高聚合物凝胶强度,使调剖体系耐温达到300℃以上。
优选的,所述甲基纤维素醚分子量为2~10万。
优选的,所述聚丙烯酰胺分子量为1800~2300万,水解度为20~25%。
优选的,所述交联剂为水溶性酚醛树脂。
优选的,所述热稳定剂为硅烷偶联剂。
优选的,所述有机纤维颗粒的粒径为0.2~2mm。
本发明甲基纤维素醚、聚丙烯酰胺、酚醛树脂和热稳定剂四种材料反应、相互作用形成耐温达到200℃凝胶体,调剖剂在稠油注汽井的调剖封窜成功率明显提高,同时增油效果也明显得到提高,该产品也适合150~200℃油井堵水,增大了适用范围。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。
一种采油用调剖剂纤维素醚类的制备方法,包括以下步骤:
S1、准备甲基纤维素醚、聚丙烯酰胺、树脂、热稳定剂和有机纤维颗粒;
S2、将上述甲基纤维素醚、聚丙烯酰胺、树脂和热稳定剂加入水中进行混合,并搅拌20min,保证各种原料充分溶解;
S3、上述混合物体系中含有多种官能团,如羟基、羧基、甲氧基、双键、醚键、硅氧键和芳香基,该体系收入这些基团后,易于发生反应生成交联的体型网状结构,分子链上引入硅氧键、芳香基和醚键后,能提高体系的耐温性,聚合物可以与羟基、甲氧基形成交叉网状结构,使生成的三维空间网状更加致密,最终反应产生聚合物凝胶体,其中聚合物凝胶部分耐温达到200℃;
S4、通过往调剖剂中填充耐温达到300℃的有机纤维颗粒后,进行充分混合搅拌,使有机纤维颗粒分散到溶液中,能进一步提高聚合物凝胶强度,使调剖体系耐温达到300℃以上。
本实施例中,所述甲基纤维素醚分子量为2~10万。
本实施例中,所述聚丙烯酰胺分子量为1800~2300万,水解度为20~25%。
本实施例中,所述交联剂为水溶性酚醛树脂。
本实施例中,所述热稳定剂为硅烷偶联剂。
本实施例中,所述有机纤维颗粒的粒径为0.2~2mm。
该调剖剂聚合物凝胶部分主要由甲基纤维素醚、聚丙烯酰胺、树脂和热稳定剂组成,是一种复杂的混合物,体系含有多种官能团,如羟基、羧基、甲氧基、双键、醚键、硅氧键和芳香基,该体系收入这些基团后,易于发生反应生成交联的体型网状结构,分子链上引入硅氧键、芳香基和醚键后,能提高体系的耐温性,聚合物可以与羟基、甲氧基形成交叉网状结构,使生成的三维空间网状更加致密。能使调剖剂的聚合物凝胶部分耐温达到200℃,通过实验得出,未加入固相的聚合物凝胶在200℃、10天内凝胶完好,11天后破胶;在180℃、30天内凝胶完好。通过往调剖剂中填充耐温达到300℃的有机纤维颗粒后,能进一步提高聚合物凝胶强度,使调剖体系耐温达到300℃以上。在稠油吞吐注汽过程中,注汽时间一般在7~10天,油层汽窜通道温度一般在150℃~200℃之间,在注汽时间内聚合物凝胶部分不水化,同时通过纤维颗粒的添加所形成的颗粒胶体通过在渗流孔道中的叠加累积作用,在高渗透层形成较高的突破压力,从而达到较好调剖封窜的目的。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (6)

1.一种采油用调剖剂纤维素醚类的制备方法,其特征在于,包括以下步骤:
S1、准备甲基纤维素醚、聚丙烯酰胺、树脂、热稳定剂和有机纤维颗粒;
S2、将上述甲基纤维素醚、聚丙烯酰胺、树脂和热稳定剂加入水中进行混合,并搅拌20min,保证各种原料充分溶解;
S3、上述混合物体系中含有多种官能团,如羟基、羧基、甲氧基、双键、醚键、硅氧键和芳香基,该体系收入这些基团后,易于发生反应生成交联的体型网状结构,分子链上引入硅氧键、芳香基和醚键后,能提高体系的耐温性,聚合物可以与羟基、甲氧基形成交叉网状结构,使生成的三维空间网状更加致密,最终反应产生聚合物凝胶体,其中聚合物凝胶部分耐温达到200℃;
S4、通过往调剖剂中填充耐温达到300℃的有机纤维颗粒后,进行充分混合搅拌,使有机纤维颗粒分散到溶液中,能进一步提高聚合物凝胶强度,使调剖体系耐温达到300℃以上。
2.根据权利要求1所述的一种采油用调剖剂纤维素醚类的制备方法,其特征在于,所述甲基纤维素醚分子量为2~10万。
3.根据权利要求1所述的一种采油用调剖剂纤维素醚类的制备方法,其特征在于,所述聚丙烯酰胺分子量为1800~2300万,水解度为20~25%。
4.根据权利要求1所述的一种采油用调剖剂纤维素醚类的制备方法,其特征在于,所述交联剂为水溶性酚醛树脂。
5.根据权利要求1所述的一种采油用调剖剂纤维素醚类的制备方法,其特征在于,所述热稳定剂为硅烷偶联剂。
6.根据权利要求1所述的一种采油用调剖剂纤维素醚类的制备方法,其特征在于,所述有机纤维颗粒的粒径为0.2~2mm。
CN202011010012.4A 2020-09-23 2020-09-23 一种采油用调剖剂纤维素醚类的制备方法 Pending CN112011323A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971440A (en) * 1975-09-10 1976-07-27 Phillips Petroleum Company Method for treating subterranean formations with cellulose ether-polyacrylamide aqueous gels
CN102559159A (zh) * 2011-12-14 2012-07-11 中国石油天然气股份有限公司 一种耐高温酚醛树脂弱凝胶调剖堵水剂
CN110734259A (zh) * 2019-11-21 2020-01-31 嘉华特种水泥股份有限公司 一种热弹性稠油热采固井水泥
CN111363527A (zh) * 2020-03-24 2020-07-03 嘉华特种水泥股份有限公司 一种低温高强油气井封堵剂

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971440A (en) * 1975-09-10 1976-07-27 Phillips Petroleum Company Method for treating subterranean formations with cellulose ether-polyacrylamide aqueous gels
CN102559159A (zh) * 2011-12-14 2012-07-11 中国石油天然气股份有限公司 一种耐高温酚醛树脂弱凝胶调剖堵水剂
CN110734259A (zh) * 2019-11-21 2020-01-31 嘉华特种水泥股份有限公司 一种热弹性稠油热采固井水泥
CN111363527A (zh) * 2020-03-24 2020-07-03 嘉华特种水泥股份有限公司 一种低温高强油气井封堵剂

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