具有稠油降黏作用的泡沫体系室内实验评价

Laboratory Evaluation of Foam System with Viscosity Reduction Effect for Heavy Oil

陈 超 张新春 刘广峰 徐 浩 王 鹏 廖建军

CHEN Chao ZHANGXinchun LIU Guangfeng XU Hao WANG Peng LIAO Jianjun

针对鲁克沁玉东区块高温高盐稠油的特性且现场应用的XHY-4泡沫体系驱油效果不理想的问题，研究了 具有稠油降黏作用的DY-2泡沫体系的降黏效果、泡沫稳定性、抗油性能、封堵能力以及驱油效果，并与XHY-4泡 沫体系进行了对比。实验结果表明，有效含量为0.1%的DY-2溶液与稠油按体积比1∶1混合后可使稠油黏度降 低82.5%。DY-2泡沫体系的泡沫性能优于现用XHY-4泡沫体系。DY-2泡沫体系在能显著降低稠油黏度的情况 下还能兼顾优秀的泡沫性能。DY-2泡沫体系（有效含量为0.1%）的发泡体积为445mL，泡沫半衰期为2186s，析 液半衰期为96s，泡沫综合指数为72.96×104mL·s。DY-2泡沫体系具有较好的抗油性与封堵性，当含油量从0% 增加到20%的过程中，泡沫体系稳定性无明显下降；当岩心渗透率为750×10-3～1250×10-3μm2时，DY-2泡沫体系 的阻力因子能稳定在60左右。在双管驱替实验中，DY-2在对高低渗管分流率、综合含水率以及综合采出程度方 面的改善效果均优于XHY-4，采出程度增幅为16.2%，比XHY-4高出4.6百分点。DY-2泡沫体系可更好地满足玉 东区块泡沫驱提高采收率的技术要求。

In view of the characteristics of high temperature and high salinity heavy oil in Yudong Block of Lukeqin and the unsatisfactory oil displacement effect of XHY-4 foam system applied in the field，the viscosity reduction effect，foam stability，oil resistance，plugging ability and oil displacement effect of DY-2 foam system with heavy oil viscosity reduction were studied and compared with XHY-4 foam system. The experimental results showed that the viscosity of heavy oil could be reduced by 82.5% when the DY-2 solution with an effective content of 0.1% was mixed with heavy oil at a volume ratio of 1∶1. The foam performance of DY-2 foam system was better than that of XHY-4 foam system. The DY-2 foam system could also achieve excellent foam performance while significantly reducing viscosity of heavy oil. The foaming volume of DY-2 foam system with effective content of 0.1% was 445 mL，the foam half-life was 2186 s，the half-life of liquid separation was 96 s，and the foam comprehensive index was 72.96×104 mL·s. The DY-2 foam system had good oil resistance and plugging performance. When the oil content increased from 0% to 20%，the stability of the foam system did not decrease significantly. When the core permeability was 750×10-3～1250×10-3μm2，the resistance factor of DY-2 foam system could be stabilized at about 60. In the double-tube displacement experiment， DY-2 was superior to XHY-4 in improving the diversion rate，comprehensive water content and comprehensive recovery degree of high and low permeability pipes. The recovery degree increased by 16.2%，being 4.6 percentage points higher than XHY-4. The DY-2 foam system could better meet the technical requirements of foam flooding to enhance oil recovery in Yudong block.

10.19346/j.cnki.1000-4092.2023.04.015