低吸附缓交联调驱体系用多重乳液交联剂  

Preparation and Evaluation of Low-Adsorptive Retarded Crosslinker Multiple Emulsion as Retardative Crosslinker for Aqueous Polymer Gels

作　　者：田玉芹[1,2] 赵林[1] 汪庐山[2] 胡秋平[2] 徐鹏[2] 马东[1] 董淼[1] 

机构地区：[1]长江大学石油工程学院,湖北荆州434023 [2]中国石化胜利油田分公司采油工艺研究院,山东东营257000

出　　处：《油田化学》2011年第4期380-384,共5页Oilfield Chemistry

基　　金：国家863项目"逐级深部调驱液流转向技术研究"(项目编号2001AA06Z234)

摘　　要：低吸附延缓交联体系由部分水解聚丙烯酰胺和多重乳液交联剂等配制而成,多重乳液交联剂为W/O结构,将与聚丙烯酰胺交联的有效成分包裹在内水相中,靠地层孔喉的剪切与温度达到破乳来释放有效成分,从而实现延缓交联的作用。多重乳液交联剂的最佳工艺为内外相质量比为2,乳化剂与外相质量比为0.13～0.16,助剂与外相质量比为0.14～0.20,搅拌速率4000～6000 r/min。该多重乳液交联剂表面呈电中性,平均粒径934.1 nm,具有较好的适配性和放置稳定性。由多重乳液交联剂配制的调剖体系与由XL-2交联剂配制的调剖体系的增黏性和热稳定性相当,但前者的静态交联时间比后者延长了9天左右,动态交联时间延长了24天左右,且交联性能没有明显改变。由于交联剂特殊的结构,其吸附力很低,使得后续交联聚合物调驱段塞易流向地层深部,生成冻胶体系封堵高渗透水流通道,达到深部调驱的目的。In this paper,the low-adsorptive retarded crosslinking system was prepared by using W/O emulsion method.The effective constituent of crosslinker was packaged by external phase of the emulsion and was released depending on shearing and temperature of the formation.The best technology of multiple emulsion crosslinking agent was obtained as follows,the mass ratio of the internal phase to the external phase was 2,the mass ratio of the emulsifier to the external phase was 0.13 ～ 0.16,the mass ratio of the auxiliaries to the external phase was 0.14 ～ 0.20,stirring speed was 4000 ～ 6000 r/min.The surface of the multiple emulsion crosslinking agents was neutral,and the average particle size was 934.1 nm,in addition,the multiple emulsion crosslinking agents possessed better suitability and stability.The experiment showed that the performance in increasing viscosity and heat resistance of the multiple emulsion crosslinking agents were similar to that of the XL-2 corsslinker,while the dynamic/static retarded crosslinking time of the former was prolonged for 24 days and 9 days,respectively,compared to that of the latter.Moreover,the crosslinked intensity was unaffected.Because of the special configuration,the adsorption amount of the crosslinker was weak in the formation.As a result,the crosslinking polymer profile control slug could flow to deep formation easily,and the path with high transmissibility was plugged by the formed gel to achieve the purpose of deep profile controlling.

关 键 词：吸附 缓交联 多重乳液 交联剂 深部调剖 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]