The invention discloses a sand carrying fluid for sand control of unconsolidated sandstone heavy oil reservoir, which has the advantages of reducing viscosity, increasing oil, low damage, waterproof sensitivity, restraining clay swelling, and strong sand carrying capacity. The sand carrying fluid consists of the following components: main agent of 0.45%-0.6%, cleaning agent of 1%-2%, clay stabilizer of 3%-5%, and clay stabilizer of 0.5%-1.5%. Water damage treatment agent, the remaining amount is water. After the main agent of the sand-carrying fluid is dissolved in water, the branch chain extends to form a spatial network structure and improves the sand-carrying capacity; the polar group can rapidly infiltrate the heavy oil, reduce the viscosity of the heavy oil, improve the fluidity and improve the development effect of the reservoir by solubilizing, dispersing, destroying the structure of the heavy oil, changing the content of the components, etc. . The sand carrying fluid of the invention can improve the success rate of sand control operation and the effective period of sand control, reduce the viscosity of heavy oil, and improve the effect of steam injection development of heavy oil.
【技术实现步骤摘要】
一种疏松砂岩稠油油藏防砂用携砂液
本专利技术涉及一种疏松砂岩稠油油藏防砂用携砂液,属于疏松砂岩稠油油藏防砂
技术介绍
疏松砂岩稠油油藏由于油层结构疏松,胶结性能差,油藏泥质含量高,导致出砂严重。同时,稠油热采导致地层充填带外亏空,砂粒反复运移,新井投产前和生产过程中需要进行防砂。防砂技术已成为疏松砂岩稠油油藏开发基础工艺,对油田持续稳产发挥着关键作用。目前主要采用复合防砂、挤压充填防砂等工艺,均需要进行地层挤压充填,防止地层出砂。地层挤压充填时需采用携砂液将充填砂带入地层。目前主要采用羟丙基瓜胶携砂液,但该携砂液存在剪切降解、返排率低、存在水敏伤害、残留高导致储层伤害、防砂后油井产量下降等缺点。此外,还缺乏对稠油油藏的针对性,存在以下不足之处:1)稠油粘度高,采用瓜胶携砂液进行地层挤压充填时容易形成砂桥,导致充填不密实;2)大量携砂液液体挤入地层,导致后续注汽开采效率降低;3)携砂液遇高温流变性能发生变化,携砂能力下降,无法实现高砂比充填。
技术实现思路
针对上述现有技术,本专利技术提供了一种疏松砂岩稠油油藏防砂用携砂液,其适用于疏松砂岩稠油油藏防砂,具有降粘、增油、低伤害、防水敏、抑制粘土膨胀、携砂能力强等优点。本专利技术是通过以下技术方案实现的:一种疏松砂岩稠油油藏防砂用携砂液,由以下重量份的组分组成:0.45%~0.6%的携砂液主剂,1%~2%的清洗剂,3%~5%的粘土稳定剂,0.5%~1.5%的水伤害处理剂,余量为水。优选的,由以下重量份的组分组成:0.5%的携砂液主剂,1.5%的清洗剂,4%的粘土稳定剂,1.0%的水伤害处理剂,余量为水。所 ...
【技术保护点】
1.一种疏松砂岩稠油油藏防砂用携砂液,其特征在于:由以下重量份的组分组成:0.45%~0.6%的携砂液主剂,1%~2%的清洗剂,3%~5%的粘土稳定剂,0.5%~1.5%的水伤害处理剂,余量为水;所述携砂液主剂为丙烯酰胺‑聚醚丙烯酸酯‑正丁烯磺酸钠共聚物,其化学结构式如下所示:
【技术特征摘要】
1.一种疏松砂岩稠油油藏防砂用携砂液,其特征在于:由以下重量份的组分组成:0.45%~0.6%的携砂液主剂,1%~2%的清洗剂,3%~5%的粘土稳定剂,0.5%~1.5%的水伤害处理剂,余量为水;所述携砂液主剂为丙烯酰胺-聚醚丙烯酸酯-正丁烯磺酸钠共聚物,其化学结构式如下所示:其中,a为1000~1500之间的整数,b,c均为800~1200之间的整数,m未500~800之间的整数;所述清洗剂选自十六烷基苯磺酸钠,十二烷基苯磺酸钠;所述粘土稳定剂为无...
【专利技术属性】
技术研发人员:张松亭,王志坚,杨胜利,白昕,荣雁,杜春安,陈晓春,马天态,孙立柱,岳继文,杨再新,
申请(专利权)人:中国石油化工股份有限公司,中国石油化工股份有限公司胜利油田分公司石油工程技术研究院,
类型:发明
国别省市:山东,37
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