一种适于低渗油藏开发的低分子聚合物压裂液体系研究  

Low Molecular Weight Polymer Fracturing Fluid System for Low Permeability Reservoirs

作　　者：李海娟 宋吉锋 LI Hai-juan;SONG Ji-feng(Zhanjiang Laboratory Center of Engineering Technology Branch, CNOOC EnergyTechnology & Services Limited, Zhanjiang 524057, Guangdong, China;CNOOC Zhanjiang Branch, Zhanjiang 524057, Guangdong, China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司中海油实验中心湛江实验中心,广东湛江524057 [2]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《承德石油高等专科学校学报》2020年第6期32-37,共6页Journal of Chengde Petroleum College

摘　　要：针对低渗油藏压裂增产,研究出一种低分子聚合物压裂液体系。该体系以低分子聚合物SF-2为稠化剂,自制铝交联剂LH-1交联,氧化型SL-1破胶剂破胶。在30℃时,通过室内实验确定了体系的最佳配比:0.5%的稠化剂、交联比100∶3、1.5%的破胶剂、0.4%的交联促进剂、0.1%的黏土稳定剂、0.12%的助排剂、0.2%的破乳剂。性能评价结果表明,该压裂液体系具有良好的抗剪切和流变性,并且携砂能力强、破胶彻底、残渣含量少、成本低、对地层伤害小。The low molecular weight polymer water-based fracturing fluid system is studied to increase production of low permeability reservoirs.The new system contains low molecular weight polymer SF-2 as thickening agent,laboratorial self-made aluminum cross-linking agent LH-1 and the gel breaker LS-1.At the temperature of 30℃,laboratorial tests are carried out to determine the best ratio among those agents:0.5%of the thickener,cross-linking ratio 100∶3,1.5%of the breaker,0.4%of the cross-linking accelerant,0.1%of the clay stabilizer,0.12%of the cleanup additive,and 0.2%of the demulsifier.The performance evaluation results show that the new fracturing fluid system has the advantages of a good resistance when shearing and rheological property,low residue content,strong carrying capacity,low cost,thorough gel breaking,low formation damage,etc.

关 键 词：低渗透油藏 低分子聚合物 水基压裂液 最佳配比 性能评价 

分 类 号：TE357[石油与天然气工程—油气田开发工程]