普适性有机铬交联剂CL-Ⅰ的研制  

Universal Chromium Carboxylates Crosslinker CL-Ⅰ for Gelling Commercial Polymers in Aqueous Solution

作　　者：田玉芹[1] 吕西辉[1] 汪庐山[1] 李公让[2] 张小卫[1] 刘军[1] 刘福娥[1] 

机构地区：[1]中国石化胜利油田公司采油工艺研究院,山东东营257000 [2]中国石化胜利石油管理局钻井工艺研究院,山东东营257017

出　　处：《油田化学》2005年第1期85-88,共4页Oilfield Chemistry

摘　　要：有机铬交联剂CL-Ⅱ和CL-Ⅲ对一些商品聚合物(HPAM)溶液的交联增粘效果不佳,加入除氧剂也不能使增粘效果明显改善.用原子吸收法和核磁共振法对商品聚合物进行分析,发现其中含有可阻滞聚合物与Cr3+之间交联反应的某种物质,法国SNF公司的聚合物3530S中该物质含量最高.筛选出了一种可屏蔽该物质的化合物,在羧酸铬交联剂中加入该屏蔽物及除氧剂,得到了Cr3+含量44～50 g/kg,普适性很强的交联剂CL-Ⅰ.对于用矿化度5.7 g/L的模拟污水配制的浓度1500 mg/L的包括3530S在内的9种商品聚合物溶液,CL-Ⅰ在加量为25、20 mg/L,甚至15 mg/L时均可产生交联增粘效果.CL-Ⅰ也可用于清水聚合物溶液的交联.CL-Ⅰ在40℃放置30天后的交联活性基本不变.聚合物/CL-Ⅰ(1500/25 mg/L)污水溶液在70℃反应3天后,生成的弱凝胶70℃、0.422 Hz下的复数粘度η*超过200 mPa·s,在70℃密闭热老化90天后粘度保持率大于80%.图2表7参2.A lot of commercial polymers HPAMs can not be gelled properly in aqueous solution with Cr3+crosslinkers CL-Ⅱand CL- Ⅲand the commonly effective additives do not promote the crosslinking/gelling processes.Atom absorption and nuclear magnetic resonance studies show that there exists some substance inhibiting polymer/Cr3+crosslinking in these polymers and SNF s 3530S is rich in this substance particularly.A chemical compound screening the crosslinking inhibitor is chosen and introduced into a chromium carboxylates preparate together with an oxygen scavenger to give an universal Cr3+crosslinker, CL-Ⅰ, of Cr3+content 44—50 g/ kg.With CL-Ⅰat dosage 25, 20, or even 15 mg/L, the 1500 mg/L solutions of 9 polymers including 3530S in a simulation produced water ofTSD=5.7 g/L are effectively crosslinked, viscosified and gelled.CL-Ⅰcan be used for gelling polymer solutions prepared in fresh water.CL-Ⅰkeeps its crosslinking activity after standing at 40℃over 30 days.The weak gels formed from polymer/CL-Ⅰ(1500/25 mg/L) solutions in the simulation produced water at 70℃in 3 days have complex viscosityη*>200 mPa .s at 70℃and 0.422 Hz and keep >80% of their initial viscosityη*after thermal ageing in hermitic vessels at 70℃over 90 days.

关 键 词：有机铬交联剂 制备 聚合物适应性 聚合物溶液 交联增粘 弱凝胶 调驱剂 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.46