非均质条件下乳状液调剖机理  

Experimental study on profile control mechanism of oil-in-water emulsion in heterogeneous model

作　　者：赵清民 吕静[2] 李先杰 赵晓娇[4] 岳湘安[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京100083 [2]中国石油勘探开发研究院,北京100083 [3]中海石油研究中心,北京100083 [4]中国石化股份胜利油田分公司河口采油厂,山东东营257200

出　　处：《油气地质与采收率》2011年第1期41-43,47,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展"973计划"项目"化学驱和微生物驱提高石油采收率的基础研究"(2005CB221303)

摘　　要：采用流变仪或者粘度仪研究乳状液的调剖性能有一定的局限性。因此,建立非均质实验模型,以孔隙直径为基础,研究了乳状液在单管模型中运移阻力的变化以及对流度的调整能力等,分析了乳状液液滴通过不同尺度孔隙的运移特点,观察了注入乳状液段塞前后的流度变化。利用合注分采实验,分析其在多孔介质并联管中的注入选择性,研究乳状液在多孔介质运移时的波及效率,以及对后续注入驱油剂波及效率的影响,以期达到综合分析乳状液调剖能力的目的。实验结果表明,乳状液在与其粒径相匹配的孔隙中,运移阻力系数很大,且可以大幅度降低驱油剂的流度;在多孔介质中,乳状液进入高渗透管的流量明显大于进入低渗透管的流量,波及效率高;在乳状液液滴粒径与多孔介质孔隙直径匹配关系较好的情况下,可以对渗透率高的层位实现有效封堵,但是如果高渗透通道孔隙直径过大,封堵效果明显较差。There exists limits of studying profile control by means of rheometer or viscoscope.In order to analyze the ability of e-mulsion＇s profile control,the heterogeneous physical model is designed,in view of pore throat,changes of resisting force,capaci-ty of adjusting mobility,flow characteristics of emulsion in different size of pore and mobility before and after injecting emulsion is studied by the single pipe model.Furthermore,the flooding experiments of emulsion in parallel sand-packed model are imple-mented to study the injective selectivity and function so as to enlarge the swept volume.Experiment results.show that,when the model matches emulsion＇s particle size,the emulsion is of high resistance coefficient and will greatly reduce the oil displacement agent＇s mobility;moreover,the quantity that emulsion flows into high permeability pipe is higher than the emulsion in lower per-meability pipe;emulsion can effectively block the high permeability channel,however,if the pore throat of high permeable chan-nel is too large,the plugging performance will be remarkably deteriorated.

关 键 词：非均质 乳状液 孔隙直径 驱油剂流度 波及效率 调剖 

分 类 号：TE357[石油与天然气工程—油气田开发工程]