第34卷第4期 2017年7月
钻井液与
究
井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3969/j.issn.1001-5620.2017.04.003
Vol.34 No.4 July2017
一种亚微米固相絮凝剂的合成及性能评价蒋官澄1，李新亮1，彭双磊「，赵利2，李公让3，张敬辉
（1.中国石油大学（北京）石油工程学院，北京102249；2.西部钻探工程有限公司克拉玛依钻井公司，克拉玛依834000；
3.胜利石油工程有限公司钻井工艺研究院，山东东营257017）
再官登，李薪亮，
未固相案凝剂的合虑及性能评价[].钻井液与完井液，2017，34（4）：15-19
种亚微米
JIANG Guancheng,LI Xinliang,
Shuanglei.et al.Synthesis and evaluation of a submicron solid flocculant GCS[J]
PENG
Drimhing Flanid &
摘要的素子
实照 GCS
中图分类号：TE254.4
201
水基钻井币
15-19.
佳能尚轻大
因北有必要研发有针对性
目款凝剂GC
通过正交实照
让粒度分析
流降
节米泰明
且
文献标识码：A文章编号：1001-5620（2017）04-0015-05
Synthesis and Evaluation of a Submicron Solid Flocculant GCS
JIANG Guancheng', LI Xinliang', PENG Shuanglei', ZHAO Li, LI Gongrang', ZHANG Jinghui
(1. School of Petroleum Engineering, China University of Petroleum, Beijing 102249;
2. Kelamayi Drilling Company of CNPC Xibu Drilling Engineering Company Ltd., Kelamayi, Xinjiang 834000;
3. Shengli Drilling Technology Research Institute of Sinopec, Dongying, Shandong 257017)
Abstract Submicron solids laden in drilling fluid as drilling proceeds greatly affect the properties of the drilling fluid, and are thus needed to be removed with flocculants dedicated for the submicron solids. GCS is such a flocculant synthesized with chitosan. The optimum synthetic conditions determined through orthogonal experiment were as follows: 3% chitosan, mass ratio of chitosan and crosslinking agent = 1 :0.28, pH = 7. Particle size analysis and sedimentation test were done to evaluate the flocculating effect of GCS, and the flocculating mechanisms of GCS were determined through IR spectroscopy, zeta potential measurement and SEM. It has been found that GCS has good flocculating ability, 95% of submicron kaolinite particles can be flocculated. Compared with other flocculants, such as polyacrylamide, GCS does not viscosify drilling fluids; the sizes of the flocs are narrowly distributed and are thus easy to be separated from drilling fluid. GCS has better flocculating effect in alkaline environment. At higher pH value and GCS concentrations, better flocculation can be achieved, and the flocs become more compact. GCS has —OH, —NH, —CN and —NH , functional groups with which GCS is tightly adsorbed onto the surface of kaolinite particles through these groups, neutralizing the electric charges on the
surface of the kaolinite surface, hence increasing the potential of kaolinite particles, thereby coalescing the particles to form flocs Key words Flocculant; Submicron; Solids; Water base drilling fluid
基金项目：国家“十三五”重大专项“致密油气开发环境保护技术集成及关键装各”（2016ZX05040-005）、中石油集 090
第一作者简介：蒋官澄，教投，博士生导师，国家杰出青年科学基金获得者，1966年生，主要从事油气层损害与保护
油田化学等方面的教学和研究工作。电话（010）89732239；E-mail：jgc5786@126.com；petroleumliang@126.com 万方数据