刘金鑫 李静 戴志鹏 郭轩 邵洪志 何晨

摘      要：聚表剂是一种新型功能型聚合物，能在聚合物驱后进一步提高采收率，目前尚处于矿场试验阶段。矿场分析聚表剂时，多是在注入井和采出井提取样品;而室内实验所用溶液都是现配现用，其分析结果仅处于注入前的性能和注入后的效果层面。然而聚表剂从注入井运移到采出井要经历数百天时间，且在注采井间渗流的过程中受地层孔隙结构的影响黏度稳定性会发生变化。聚表剂的黏度稳定性发生变化后如何影响其驱油机理和渗流规律，目前尚无研究。针对以上问题，以静置30 d的华鼎I聚表剂溶液模拟位于注采井间储层的聚表剂溶液。通过室内实验研究聚表剂溶液在静置前后的性能差异;通过光刻玻璃实验比较聚表剂初始溶液和静置后溶液的微观驱油机理，描述两种情况下的微观驱替特征。基于以上研究得出：光刻玻璃实验中，在聚表剂驱阶段，静置后华鼎I聚表剂溶液较静置前提高相对波及面积4.3%，静置后的聚表剂溶液黏弹性和乳化性能都有提升。

关  键  词：聚表剂;稳定性;驱油机理;渗流规律;物理实验

中图分类号：TE 357.46      文献标识码： A       文章编号： 1671-0460（2019）08-1905-04

Abstract：  Polymer surfactant is a new type of functional polymer which can improve recovery after polymer flooding. And it is currently in the stage of field test. The samples were extracted mostly from the injection wells and extraction wells when polymer surfactant was analyzed in oil field， but the solutions for laboratory experiments were always prepared on-site. The results of the analysis were only at the level of performance before injection and the effect after injection. However， it usually took hundreds of days to migrate polymer surfactant from the injection well to the production well. During the seepage process， the viscosity stability was changed by the pore structure. How to affect the oil displacement and seepage law after the change of viscosity stability of the polymer surfactant is still lack of research. The difference of properties of polysurfactant solution before and after static test was studied. The microscopic oil displacement characteristics of the initial solution and the static solution were compared by photolithographic glass experiment. Based on the above studies， it was concluded that in the photoresist glass experiment， the statically treated Huading I polysurfactant solution increased relative sweep area by 4.3% compared with that before the static treatment， and the viscoelasticity and emulsifying performance of the statically treated polysurfactant solution were improved.

Key words：  polymer surfactant; stability; oil displacement mechanism; seepage law; physical experiment

聚表劑是一种新型驱油化合物，它拥有聚合物和表面活性剂二者的优势，即使不用碱，也能降低流度比[1-5]、扩大波及系数[6-11]、提高对原油的增溶和乳化能力[12-20]。加大对聚表剂方面的研究，对实现油田的有效开发有重要意义。

1  静置前后扫描电镜实验评价