超高温(240℃)抗盐聚合物降粘剂的合成与评价  

Synthesis and Evaluation of Polymer Viscosity Reducer with Ultra-high Temperature(240℃) and Salt Tolerance

作　　者：贾敏 黄维安[1] 邱正松[1] 江琳[1] 曹杰[1] 钟汉毅[1] 毛惠[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中石化胜利石油工程有限公司海外工程管理中心,山东东营257000

出　　处：《化学试剂》2015年第12期1067-1072,共6页Chemical Reagents

基　　金：国家自然科学基金资助项目(51374233);山东省自然科学基金资助项目(ZR2013EEM032);中国博士后基金面上资助项目(2014M551986)

摘　　要：针对我国石油工业中超高温、高矿化度、高固相水基钻井液流变性调控技术瓶颈,基于分子结构优化设计和单体优选,合成了超高温抗盐低分子聚合物HTP-2,表征其结构并且评价其抗盐抗钙性能以及抗温降粘效果。优化合成工艺条件为:反应温度60℃,反应时间30 min,引发剂用量3 wt%,链转移剂用量1.43 wt%,n(AA)∶n(AMPS)∶n(UA)∶n(DMDAAC)=9∶11∶6∶6。经240℃老化16 h后的降粘效果优于国外的Descofl,优于国内经220℃老化16 h的聚合物降粘剂xy-28。在淡水基浆、淡水加重基浆及氯化钙氯化钠复合盐水基浆中240℃老化后的降粘率分别达72.98%、83.78%和71.43%。Aimed at the problem on controlling rheological properties of water based drilling fluid under the conduction of ultrahigh temperature（ 240 ℃）,high salinity and solid content,a low molecular weight polymer HTP-2 with ultra-high temperature and salt tolerance was synthesized based on the optimization design of molecular structure and monomer selection. The molecular structure of HTP-2 was confirmed. The capacity of viscosity reducing,salt and calcium tolerance were evaluated. The optimized synthesis conditions are： reaction temperature of 60 ℃,reaction time of 30 min,the content of initiator and chain terminating agent is 3 wt%,1. 43 wt%,respectively; n（ AA） ∶ n（ AMPS） ∶ n（ UA） ∶ n（ DMDAAC） = 9 ∶ 11 ∶ 6 ∶ 6. The viscosity reduction performance of HTP-2 after aging 16 h at 240 ℃ had advantages over similar products Descofl from overseas and domestic xy-28（ 220 ℃ /16h）. The viscosity reduction rate of HTP-2 in fresh water base,fresh water weighting base and composite salt water base after aging16 h at 240 ℃ was 72. 98%,83. 78% and 71. 43%,respectively.

关 键 词：水基钻井液 降粘剂 超高温 抗盐抗钙性能 高固相 

分 类 号：O647[理学—物理化学] TE254[理学—化学]