中原油田耐温抗盐交联聚合物成胶影响因素及先导试验  

Affects on the Forming of Linked-Polymer Gel under High Temperature and Salinityand A Pilot Field Test at Zhongyuan Oilfield

作　　者：邹丽[1] 娄兆彬[1] 杨朝光[1] 王志鹏[1] 李涤淑[2] 

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001 [2]中国石化中原油田分公司采油一厂,河南濮阳457001

出　　处：《内蒙古石油化工》2005年第6期118-120,共3页Inner Mongolia Petrochemical Industry

摘　　要：交联体系可分为三类,即:凝胶体、弱凝胶和交联聚合物溶液;针对高温、高盐和非均质严重的油藏特征,适于中原油田调驱应用的是:具有一定流动性和良好稳定性的弱凝胶体系;根据室内评价实验,聚合物的类型、分子量及浓度,以及交联剂类型及浓度,对成胶强度和稳定时间都有影响,而限制交联体系成胶的主要因素是高温、高盐的环境条件,此限制在本质上体现为对凝胶体系空间完善网络结构形成和破坏的影响上;目前条件下,通过精心筛选聚合物和加入适量起“保水作用”的添加剂,在温度≤90℃、矿化度≤15×104mg/L的条件下,形成稳定的弱凝胶调驱体系是完全可行的;为验证配方和技术有效性而开展的现场先导试验截止目前效果显著。Gels can be put into 3 categories: bulk gel, weak gel and linked polymer solution(LPS). For heterogeneous reservoirs with high temperature and high salinity in Zhongyuan oilfield, the most suitable flooding and phase adjusting gel should be the easily movable and stable weak gel. The lab evaluation shows that factors affecting gel strength and stability include the types, molecular weight, and solution concentration of the polymer and the types and concentration of the linker, and high temperature and high salinity, which break gel naturally by destroying the perfect gel micro-framework, are especially critical to gel stability. At present, through hard work of screening polymer carefully and mixing water-protecting additives properly, it is entirely feasible to get the expected stable weak gels under the temperature of ≤90℃ and salinity of ≤15×104mg/L. In order to testify the effectiveness of formulae and techniques involved, a pilot field test has been carried out, which by now has achieved remarkable result.

关 键 词：先导试验 中原油田 耐温抗盐 交联聚合物溶液 交联体系 弱凝胶体系 油藏特征 评价实验 稳定时间 成胶强度 环境条件 结构形成 保水作用 调驱体系 效果显著 非均质 稳定性 流动性 分子量 交联剂 添加剂 矿化度 高温 高盐 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE983