耐温抗盐有机微凝胶体系影响因素研究  

Gelation Behavior of Heat Resistant and Salt Tolerant Polymer Microgelling Solution Crosslinked by an Multihydroxyl Organic Compound

作　　者：海玉芝[1] 孔柏岭[1] 张丽庆[1] 王琦[1] 郭艳[1] 白周玲[1] 

机构地区：[1]中国石化河南油田分公司石油勘探开发研究院,河南南阳473132

出　　处：《油田化学》2007年第2期158-162,共5页Oilfield Chemistry

摘　　要：通过测定成胶溶液在75～105℃、0-180天老化过程中黏度（30℃，7．61／s）的变化，考察了一种多元羟基化合物（质量分数15％）交联的聚合物微凝胶的成胶性能。用清水配制4．0g／L的聚合物母液，用矿化度8．73g／L、pH：9．1的陈化双河油田污水稀释至设定浓度，加入交联剂溶液，控制含氧量0．1mg／L，得到实验成胶溶液。分子量1789×100、水解度24％的耶AM的最低成胶浓度为150mg／L，150-80mg／LHPAM＋50～200mg／L交联剂成胶体系在90℃老化180天后，黏度在41．4-426mPa·S范围。对于400mg／LHPAM／150mg／L交联剂成胶体系（400／150体系），当聚合物水解度相同时，黏度随分子量升高而增大；当分子量相差不大时，黏度随水解度降低（39％～0％）而略有增大；含NaCI量为2．0--30g／L时黏度变化不大，但低于无盐体系，NaCI含量增至100g／L时黏度反而增大；温度由75℃升至105℃时，成胶时闻由10天缩短至0．5天。400／250体系经10cm长岩心剪切后，随流速增大（0～500m／d）成胶时间延长，成胶黏度减小。该有机微凝胶可耐温105℃，耐矿化度100g／L。图3表5参7。The gelation behavior of polymer/multihydroxyl compound （MHC） microgelling solution is investigated by measuring changes in its app viscosity at 3012 and 7.6 1/s in the course of ageing at 70-105℃ in duration of 180 days. The crosslinker used contains 15 % MHC. The microgelling solution under study is prepared by thinning 4.0 g/L concentrated polymer fresh water solution with an aged produced water of TSD = 8.73 g/L and pH= 9.1 from Shuanghe, Henan, and by mixing the solution obtained with crosslinker and is treated to dissolved oxygen content 0.1 mg/L. For a commercial polymer HPAM of M = 1. 789 × 10^7 and HD =24%, the minimal polymer concentration needed for microgel formation is of 150 rng/L and the app viscosity of 150-800（mg/ L）/50-200（mg/L） HPAM/crosslinker solution aged at 9012 in 180 days is in range 41. 4-426 mPa·s. For a 400/150 HPAM/ crosslinker solution, its app viscosity increases with increasing M value of the polymers of similar HD value and slightly increases with decreasing HD value （39%-0%） of the polymers of M value in a relatively narow range. When ageing temperature is increased from 75℃to 105℃, the gelation time is shortened from 10 to 0.5 day. For 400/150 distilled water solution with NaCl added at dosage 20-300 g/L, the app viscosity keeps relatively high and varies within a small range and an increase in app viscosity is observed at NaCl dosage 100 g/L. For 400/250 HPAM/crosslinker produced water solution flown through core 10 cm long, the gelation time prolonges and the app viscosity decreases with increasing flowing rate in core from 0 to 500 m/d. The HPAM/MHC microgel suggested has heat resistance up to 105℃ and salt tolerancy of 100 g/L.

关 键 词：聚合物凝胶 有机交联剂 弱凝胶(微凝胶) 黏度 油田污水 耐温性 抗盐性 长期稳定性 调驱剂 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE39