淀粉基可降解暂堵剂制备及性能评价  

Development and evaluation of starch-based biodegradable temporary plugging agent

作　　者：张家旗 黄维安[2] 程荣超 冯杰 王建华 郝惠军 闫丽丽 ZHANG Jia-qi;HUANG Wei-an;CHENG Rong-chao;FENG Jie;WANG Jian-hua;HAO Hui-jun;YAN Li-li(China National Petroleum Corporation Engineering Technology Research Institute Co.,Ltd.,Beijing 102206,China;China University of Petroleum(East China),Qingdao 266530,China)

机构地区：[1]中国石油集团工程技术研究院有限公司,北京102206 [2]中国石油大学(华东),山东青岛266530

出　　处：《应用化工》2021年第9期2411-2414,共4页Applied Chemical Industry

基　　金：国家油气重大专项项目(2016ZX05020);中国石油天然气集团有限公司科学研究与技术开发项目(2019D-4226);中国石油集团工程技术研究院有限公司院级课题(CPET201911)。

摘　　要：以玉米淀粉和3种丙烯酸类单体为原料,通过接枝反应,在交联作用下聚合,同时混掺纳米碳酸钙,制备了一种环保型可降解暂堵剂STA-2。STA-2热稳定性优于淀粉,在土壤中可降解,吸水后具有“变形虫”的特点,对不同渗透率的岩心封堵性较强,具有“自适应封堵”特点,岩心渗透率恢复值可达85%以上。STA-2对水基钻井液流变性影响较小,可降低滤失量,改善储层保护效果。Based on the characteristics of starch-based water absorbing resin,starch and three acrylic acid monomers were polymerized by grafting and crosslinking reaction,while mixing nano-calcium carbonate to prepare an environmentally friendly degradable temporary blocking agent,STA-2.STA-2 had better thermal stability than starch and was degradable in soil.With the characteristics of“amoeba”after absorbing water,STA-2 had good plugging performance for low permeability,medium permeability and high permeability cores.The core permeability recovery value was more than 85%,which indicated that STA-2 had self-adaptability to formation of different permeability.With addition of STA-2,water-based drilling fluid had good rheology,reservoir protection and plugging performance.

关 键 词：暂堵剂 改性淀粉 吸水树脂 自适应性 环保 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]