砾岩油藏复合驱过程中化学剂的吸附滞留规律*

Adsorption and Retention Law of Chemicals Agent in Process of Compound Flooding in Conglomerate Reservoir

栾和鑫 唐文洁 陈艳萍 陈权生 关丹 阙庭丽 徐崇军 云庆庆 帕提古丽·麦麦提 焦秋菊 向湘兴

LUAN Huoxing TANG Wenjie CHEN Yanping CHEN Quansheng GUAN Dan QUE Tingli XU Chongjun YUN Qingqing PATIGULI·Maimaiti JIAO Qiuju XIANG Xiangxing

为研究砾岩油藏复合驱过程中化学剂在油藏运移过程中的吸附滞留规律，以不同液固比条件下研究复合 驱油体系在砾岩油砂吸附后界面性能以及化学剂吸附损耗量。研究结果表明：不同固液比条件下，二元体系 （0.2% KPS202+0.1% KYPAM2）/三元体系（0.3% KPS304+0.15% KYPAM1+1.2%碳酸钠）经过岩心砂4次吸附后 界面张力未发生明显改变，平衡界面张力IFT120min均达到超低界面张力（10-3 mN/m）的指标要求；二元体系/三元 体系经过岩心砂4次吸附后各化学剂含量均随着吸附次数增加而减少，随着岩心砂含量增加各化学剂浓度逐渐 降低。化学剂浓度随吸附次数增加降低幅度大小排序为：ASP碱浓度＞ASP表面活性剂浓度＞SP表面活性剂浓度 ＞ASP聚合物浓度≈SP聚合物浓度。图4表2参11

In order to research the adsorption and retention law of chemicals agent in process of compound flooding in conglomerate reservoir，the interfacial property and the adsorption retention of chemical agents of the SP system/ASP system after conglomerate core sand adsorption at different liquid-solid ratios was investigated. The results showed that at different liquid-solid ratios，the interfacial tension between SP system/ASP system and the crude oil changed a little after four times of the conglomerate core sand adsorption，and the equilibrium interfacial tension（IFT120min）could reach the requirement of ultra-low interfacial tension， being of 10-3 mN/m. After four times of conglomerate core sand adsorption，the concentration of the chemical agents in SP system/ ASP system decreased with the increase of adsorption times. The reduction degree of the concentration of the chemical agents was arraged as follows，alkali concentration of ASP system＞surfactant concentration of ASP system＞surfactant concentraion of SP system＞polymer concentration of ASP system≈polymer concentration of SP system.

10.19346/j.cnki.1000-4092.2021.03.022