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氧对交联聚合物体系黏度长期稳定性的影响

期刊名称：油田化学，2007，（03）
时间：0
分类：TE39[石油与天然气工程—油气田开发工程] TE357.46[石油与天然气工程—油气田开发工程]
作者机构：[1]提高油气采收率教育部重点实验室（大庆石油学院）,黑龙江大庆163318
相关基金：国家自然科学基金“低渗透油层提高驱油效率机理研究”（项目编号50634020）.
相关项目：低渗透油层提高驱油效率的机理研究

关键词：聚合物饺联剂成胶体系, 采油污水, 交联/成胶, 黏度, 长期稳定性, 曝氧环境, 缺氧环境, 杀菌剂, 硫酸盐还原菌, crosslinker/polymer gelling fluids , oilfield produced ureter , viscusity, long term stability, aerated media , axygen free media, bactericide , sulfate reducing bacteria （SRB）

中文摘要：

在45℃、曝氧和缺氧条件下，考察了铬交联、铝交联、有机交联聚合物成胶体系配制后60天内黏度的变化。3种成胶体系中聚合物浓度分别为600、600、2400mg／L，用经净化处理、矿化度4013mg／L、SRB菌容易生长繁殖的采油污水配液。有机交联剂为可生成酚醛树脂的有机物混合物。铬交联成胶体系的黏度在5～10天时达到峰值，此后迅速减小并丧失；曝氧条件下的黏度普遍高于缺氧条件下的相应黏度；加入杀菌剂使曝氧、缺氧条件下的黏度均有所增大。铝交联成胶体系的黏度变化可划分为：维持低而稳定的值（1～20天）、缓慢增大（30～50天）、迅速降低（60天）3个阶段；FR和FRR测定表明在第一阶段聚合物分子线团内部发生交联，第二阶段被认定为聚合物分子线团间发生交联；铝交联成胶体系在曝氧条件下的黏度普遍高于缺氧条件下的黏度；加入杀菌剂使曝氧和缺氧条件下的黏度均增大，并且使第二阶段至少扩展到60天以后。有机交联成胶体系10天时形成强凝胶，曝氧条件下1～5天的黏度值高于缺氧条件下的相应值，加入杀菌剂使曝氧、缺氧条件下的黏度值均有所增大。曝氧和使用杀菌荆可改善污水配制的各种交联聚合物体系黏度的长期稳定性。表6参12。

英文摘要：

The changes in viscosity of Cr^3＋ , Al^3＋, and organics/polymer crosslinking gelling systems in 60 days after being prepared are investigated at 45℃under aeration and O2 free conditions. These gelling systems contain 600,600, and 2400 mg/L polymer HPAM, respectively, and prepared in a purified oilfield produced water of TSD= 4013 mg/I., in which SRB bacteria grow easily. The oragnic crosslinker is a phenolic resin forming mixture of organic compounds. For the Cr^3＋/polymer gelling system, the viscosity reaches peak values in 5-10 days, decreases then and losses eventually; the viscosity values of the aerated gelling system are always higher than that of the O2 free gelling system; with a bactericide introduced, the viscosity of both the aerated and the 02 free gelling system is slightly increased. For the Al^3＋/polymer gelling system, the viscosity keeps low and relatively stable at the first stage, in 1-20 days, increases steadily at the second stage, in 〉20--50 days, and decreases fast in the third stage, in ≥60 days; at the first stage intrarnolecularly crosslinked coiled polymer is existed as shown by FR and FRR measurements and the second stage is considered to appear as a result of intermolecularly crosslinking of polymer coiL,;; the viscosity values of the aerated system are always higher than that of the O2 free system; with the bactericide introduced, the viscosity of both the aerated and the O2 free system is increased and the sencond stage is prolonged at least to 60 days and later. The organics/polymer gelling system becomes a strong gel and the viscosity data in 1-5 days show that the viscosity values of the aerated system are always higher than that of the O2 free system and the viscosity of both the aerated and O2 free system is increased with the bactericide introduced. It is concluded that aeration and bactericidal treatment can enhance the viscosity and the long term stability of various crosslinker/polymer gelling systems prepared in oilfield produced water.

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