中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：178-186,9.DOI:10.3969/j.issn.1673-5005.2017.06.023
超支化聚乙烯亚胺作为钻井液页岩抑制剂研究
Study on hyper-branched poly( ethyleneimine) as shale inhibitor in water-based drilling fluid
摘要
Abstract
The application potential of Hyper-branched poly( ethyleneimine) ( PEI) as high-performance shale inhibitor in water-based drilling fluid was studied. The inhibitive performance of PEIs with different relative molecular weight was evalua-ted by bentonite linear swelling test, inhibition test, sediment test, and shale dispersion test, through which the influence of PEIs with different relative molecular mass on the performance of clay-free drilling fluid was investigated. The results indicate that PEI can effectively inhibit the hydration dispersion of bentonite and shale. Among all the tested samples, it is found that PEIs with molecular weight ranging from 600 to 750000 show the best inhibitive performance. For the PEI with low molecular weight the hydration swelling and dispersion of bentonite is inhibited through inhibiting crystalline swelling and neutralizing negative charges on outer surfaces of bentonite crystals. However, PEI with high molecular weight PEI inhibits the swelling and dispersion of bentonite through bridging effect of hyper-branched polymer chains. Although the inhibitive performance of PEI with high molecular weight is excellent, its compatibility with negative charged polymer-typed additives is poor. Howev-er, PEI with low molecular weight has no negative effect on the rheology and the filtrate loss of drilling fluid. Also, it can in-crease the shearing force of the system slightly and improve the capacity of carrying and suspending rock debris and weighting material.关键词
钻井液/页岩抑制剂/井壁稳定/聚乙烯亚胺/超支化Key words
drilling fluid/shale inhibitor/wellbore stability/poly( ethyleneimine)/hyper-branched分类
能源科技引用本文复制引用
宣扬,蒋官澄,宋然然,王治法,林永学..超支化聚乙烯亚胺作为钻井液页岩抑制剂研究[J].中国石油大学学报（自然科学版）,2017,41(6):178-186,9.基金项目
国家"863"计划项目(2013AA064803) （2013AA064803）
国家自然科学基金创新研究群体科学基金项目(51221003) （51221003）
国家自然科学基金面上项目(51474231) （51474231）
国家自然科学基金重点支持项目(U1262201) （U1262201）
