近年来,伴随我国海上稠油开采量的增加,开采难度逐年提高.为了满足海上油田普通稠油油藏开采的实际需求,基于物理化学和油藏工程等理论分析,对测试油样开展了微界面Y分散剂溶液药剂筛选,性能评价和浓度优化,借助岩心驱替等评价方法,进行了Y分散剂溶液驱油效率和驱油效果物理模拟研究,通过稠油降黏效果测定、乳化性能、界面张力和模拟驱油实验物理模拟四种实验方法进行研究.结果表明:(1)当"油、水"质量比低于 7 ∶ 3 和药剂质量浓度高于 1 000 mg/L时,乳状液黏度值较低,降黏率可以达到 80%.(2)Y分散体系可以与原油混合并成为其中的成分,改变原油原有的结构,随着乳化次数的增加原油分散程度增加油滴粒径减小,形成更小的水包油状小油滴,易于脱水.(3)"注药剂+水驱"与空白水驱对照,前者较后者可以大幅度提高采收率.(4)原油黏度对水驱或调驱增油降水效果存在较大影响.随原油黏度增加,水驱或调驱增油降水效果变差.

目前渤海油田相对高温油田较多,随着水驱开发深入,含水上升速度加快,平面、纵向矛盾日益突出.目前油田作业公司稳油控水技术方面欠缺耐高温的凝胶调剖体系,尤其是在线调剖体系,无技术积淀.为解决这一问题,对耐高温聚合物进行了筛选,从不同聚合物、交联剂以及助剂之间的复配方面着手,探索影响高温成胶及热稳定性的各种因素,完成聚合物质量分数、交联剂质量分数以及助剂优选,另采用Sydansk凝胶代码法明确体系的成胶强度及成胶时间.优选得出3种凝胶配方体系,体系一:0.2％～1.0％AS+0.1％～0.5％A1+0.1％～0.5％B1+0.6％～1.8％络合剂1+0.5％除氧剂;体系二:0.2％～1.0％AS+0.1％～0.5％A1+0.1％～0.5％B1+0.3％填充剂+0.5％辅助交联剂;体系三:0.2％～1.0％AS+0.1％～0.5％A1+0.1％～0.5％B1+0.6％～1.8％络合剂2+0.5％除氧剂.

Objective By endowing polymer microspheres with a fluorescent characteristic that enables them to have tracer performance,the actual situation of adsorption,retention,and migration of polymer microspheres in the formation can be clearly understood based on the detection of the produced liquid.However,a difficult problem that needs to be solved urgently is how to maximize the displacement ability of keeping the original microspheres with the effective integration of fluorescent materials and polymer microspheres.Methods The preparation of fluorescent microspheres was achieved through copolymerization reaction using ordinary core-shell microspheres with cationic functional monomers,acrylamide,and other main components as carriers and carbon quantum dots as fluorescent materials.The fluorescence intensity was measured and a comparative experiment of Zeta potential,hydration expansion,and sealing performance was carried out.Results The fluorescence yield rate of carbon quantum dots was high,with a minimum detection limit of 0.05%;The Zeta potential data demonstrated that the fluorescent monomer was successfully fixed to the core layer of the microspheres,ensuring effective fusion of the fluorescent material with the prototype microspheres;The difference in sealing efficiency between fluorescent microspheres and ordinary core-shell microspheres was within 3%,and the hydration expansion and sealing performance of them were basically same.Conclusions The introduction of the carbon quantum dot fluorescent material into the core layer has not changed the characteristics of the polymer microspheres,and the detection limit value is low,which is expected to be used in subsequent field applications.