CN110669483A - 一种低渗透复合抗温调剖剂 - Google Patents

一种低渗透复合抗温调剖剂 Download PDF

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CN110669483A
CN110669483A CN201910931858.2A CN201910931858A CN110669483A CN 110669483 A CN110669483 A CN 110669483A CN 201910931858 A CN201910931858 A CN 201910931858A CN 110669483 A CN110669483 A CN 110669483A
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李晓东
池世勇
刘丽萍
刘志梅
李连客
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Daqing Oilfield Kaipu Chemical Co ltd
Daqing Petroleum Administration Bureau
China National Petroleum Corp
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Abstract

本发明公开了一种低渗透复合抗温调剖剂,解决现有传统有机酚醛调剖剂高温条件下不能满足调剖需求的问题;其特征在于,按照质量百分含量计算,所述组成的含量为:聚丙烯酰胺0.35%~0.4%、草酸0.15%~0.2%、乌洛托品0.15%~0.2%、间苯二酚0.02%~0.03%、硫脲0.15%~0.2%、氯化铵0.2%~0.3%,余量为水;在温度达到78℃以上,低渗透复合抗温调剖剂随着温度的升高,成胶粘度稳定性好,有效期长,能够满足现场施工需求。

Description

一种低渗透复合抗温调剖剂
技术领域
本发明涉及油田用调剖剂。
背景技术
传统有机酚醛调剖剂只能近井调剖,耐高温条件差,长时间处于高温状态会出现脱水现象,即经多次高温蒸汽及热水冲刷后,传统有机酚醛调剖剂出现了含水不断上升等问题。国内很多油田如辽河油田、胜利油田等的油藏属稠油超稠油油藏,在高温条件下(≥60℃)传统的有机酚醛调剖剂不能满足调剖的需求,所以进行耐高温调剖剂的实验研究具有重要的意义。
发明内容
有鉴于此,本发明提供一种低渗透复合抗温调剖剂,解决现有传统有机酚醛调剖剂高温条件下不能满足调剖需求的问题。
为实现上述发明目的,所述的一种低渗透复合抗温调剖剂,其组成包括:
聚丙烯酰胺、草酸、乌洛托品、间苯二酚、硫脲、氯化铵及水。
优选地,按照质量百分含量计算,所述组成的含量为:
聚丙烯酰胺0.35%~0.4%、草酸0.15%~0.2%、乌洛托品0.15%~0.2%、间苯二酚0.02%~0.03%、硫脲0.15%~0.2%、氯化铵0.2%~0.3%,余量为水。
水+草酸+聚合物+乌洛托品+间苯二酚+硫脲+氯化铵按浓度配比依次按顺序加入,低速搅拌30分钟,配制出均匀的调剖剂溶液。该制备方法与传统有机酚醛调剖剂制备方法相同。
本发明具有如下有益效果:
本发明低渗透复合抗温调剖剂与传统有机酚醛调剖剂比较,在温度达到78℃以上,传统有机酚醛调剖剂凝胶变脆,粘弹性下降,15d后均出现脱水现象,导致堵塞井场。而低渗透复合抗温调剖剂随着温度的升高,成胶粘度稳定性好,有效期长,能够满足现场施工需求。
附图说明
通过以下参考附图对本发明实施例的描述,本发明的上述以及其它目的、特征和优点更为清楚,在附图中:
图1是本发明实施例的目测78℃条件下,配方1成胶粘度照片;
图2是本发明实施例的目测78℃条件下,配方2成胶粘度照片;
图3是本发明实施例的目测78℃条件下,配方3成胶粘度照片;
图4是本发明对比例的目测60℃条件下,低渗透复合抗温调剖剂成胶粘度照片;
图5是本发明对比例的目测60℃条件下,传统有机酚醛调剖剂成胶粘度照片;
图6是本发明对比例的目测78℃条件下,低渗透复合抗温调剖剂成胶粘度照片;
图7是本发明对比例的目测78℃条件下,传统有机酚醛调剖剂成胶粘度照片;
图8是本发明对比例的目测91℃条件下,低渗透复合抗温调剖剂成胶粘度照片;
图9是本发明对比例的目测91℃条件下,传统有机酚醛调剖剂剂成胶粘度照片。
具体实施方式
以下基于实施例对本发明进行描述,但是值得说明的是,本发明并不限于这些实施例。在下文对本发明的细节描述中,详尽描述了一些特定的细节部分。然而,对于没有详尽描述的部分,本领域技术人员也可以完全理解本发明。
一、不同组成低渗透复合抗温调剖剂的室内评价,其结果见表1:
表1不同组成低渗透复合抗温调剖剂的室内评价记录
Figure BDA0002220521610000031
通过室内评价,配方1、2、3成胶时间满足2~72h成胶;成胶粘度满足≥5000mPa·s,6d成胶粘度满足120h成胶粘度≥4000mPa·s的油田公司标准Q/SY DQ0792-2012。
图1是本发明实施例的目测78℃条件下,配方1成胶粘度照片;由图1结合表1可见,成胶时间为72h,成胶时间长,有助于调剖剂延低渗透层向油层深部运移,初始粘度低为401mPa·s,成胶粘度28641mPa·s,30天成胶粘度仍能保持在10000mPa·s以上,符合油田公司验收标准(油田公司验收标准:初始粘度≤800mPa·s;成胶时间满足2~72h成胶;成胶粘度≥5000mPa·s;120h成胶粘度≥4000mPa·s)
图2是本发明实施例的目测78℃条件下,配方2成胶粘度照片;由图2及表1可见,初始粘度低,成胶强度好,成胶效果明显,呈舌形,弹性大,热稳定性好,有效期长,30d粘度保留率为97.42%。
图3是本发明实施例的目测78℃条件下,配方3成胶粘度照片;由图3及表1可见,由于配方配比浓度增加,成胶时间明显缩短,为60h,初始粘度和成胶粘度也有所增加,初始粘度为652mPa·s,成胶粘度为55962mPa·s。在实际应用过程中,可以根据注入速度和井距等情况选择需要的配方。
二、对比例
低渗透复合抗温调剖剂(聚丙烯酰胺0.35%、乌洛托品0.15%、间苯二酚0.02%、草酸0.2%、硫脲0.15%、氯化铵0.2%、水98.93%)、传统有机酚醛调剖剂(聚丙烯酰胺0.5%、醋酸铬1%、水98.5%)不同温度的条件下成胶粘度对比实验结果见表2:
表2低渗透复合抗温调剖剂与传统有机酚醛调剖剂在不同温度条件下成胶粘度对比实验结果
Figure BDA0002220521610000041
图4是本发明对比例的目测60℃条件下,低渗透复合抗温调剖剂成胶粘度照片;图5是本发明对比例的目测60℃条件下,传统有机酚醛调剖剂成胶粘度照片;由图4及图5可以看出,在60℃条件下,传统有机酚醛调剖剂成胶粘度和有效期略优于低渗透复合抗温调剖剂,二者成胶时间和成胶粘度均达到现场调剖需求。
图6是本发明对比例的目测78℃条件下,低渗透复合抗温调剖剂成胶粘度照片;图7是本发明对比例的目测78℃条件下,传统有机酚醛调剖剂成胶粘度照片;由图6及图7可以看出,在78℃条件下,低渗透复合抗温调剖剂成胶效果最佳,成胶粘度较高,弹性好,成舌形,完全满足现场施工要求。传统有机酚醛调剖剂成胶粘度低,弹性差,有效期短,有脱水现象出现。
图8是本发明对比例的目测91℃条件下,低渗透复合抗温调剖剂成胶粘度照片;图9是本发明对比例的目测91℃条件下,传统有机酚醛调剖剂剂成胶粘度照片。由图8及图9可以看出,在91℃条件下,低渗透复合抗温调剖剂成胶效果与78℃条件下成胶效果相差不大,说明该配方适高温效果明显,能够满足高温条件下的调剖的需求,而传统有机酚醛调剖剂成胶时间长,脱水严重,成胶效果差。
根据上述不同温度条件下成胶粘度的对比实验可以看出,在60℃条件下,传统有机酚醛调剖剂成胶粘度和有效期略优于低渗透复合抗温调剖剂,但是温度达到78℃以上,传统有机酚醛调剖剂凝胶变脆,粘弹性下降,15d后均出现脱水现象,导致堵塞井场。随着温度进一步提高,在91℃条件下,传统有机酚醛调剖剂不成胶,而低渗透复合抗温调剖剂成胶粘度强、稳定性好、有效期长,能够满足现场施工需求。
以上所述实施例仅为表达本发明的实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形、同等替换、改进等,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (2)

1.一种低渗透复合抗温调剖剂,其组成包括:
聚丙烯酰胺、草酸、乌洛托品、间苯二酚、硫脲、氯化铵及水。
2.根据权利要求1所述的一种低渗透复合抗温调剖剂,其特征在于,按照质量百分含量计算,所述组成的含量为:
聚丙烯酰胺0.35%~0.4%、草酸0.15%~0.2%、乌洛托品0.15%~0.2%、间苯二酚0.02%~0.03%、硫脲0.15%~0.2%、氯化铵0.2%~0.3%,余量为水。
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114106800A (zh) * 2020-08-26 2022-03-01 中国海洋石油集团有限公司 一种双酚s和甲醛交联的耐高温凝胶堵剂

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102071003A (zh) * 2009-11-24 2011-05-25 王健 一种耐高温延缓交联聚合物深部调剖剂
CN104342100A (zh) * 2013-08-02 2015-02-11 中国石油天然气股份有限公司 一种弱凝胶调剖剂及其制备和应用

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102071003A (zh) * 2009-11-24 2011-05-25 王健 一种耐高温延缓交联聚合物深部调剖剂
CN104342100A (zh) * 2013-08-02 2015-02-11 中国石油天然气股份有限公司 一种弱凝胶调剖剂及其制备和应用

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114106800A (zh) * 2020-08-26 2022-03-01 中国海洋石油集团有限公司 一种双酚s和甲醛交联的耐高温凝胶堵剂

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