用三维非均质模型研究聚合物分布规律

Research on polymer distributing law by the three-dimensional anisotropic model

祝仰文 曹绪龙 宋新旺 张战敏 韩玉贵

ZHU Yang-wen CAO Xu-long SONG Xin-wang ZHANG Zhan-min HAN Yu-gui

胜利油田地质科学研究院, 山东 东营 257015 华北油田公司采油工艺研究院, 河北 任丘 062552

为研究聚合物驱后地下滞留聚合物的分布规律及再利用的可行性,利用50 cm×50 cm×10 cm三维模型设计了中间没有隔板和有2个隔板的非均质模型,在饱和实际原油的基础上模拟层间(有隔层)及层内(没有隔层)2种情况下,聚合物驱油后各层聚合物采出总量及吸附滞留量,研究聚合物的吸附滞留规律。结果表明,注入聚合物总量的60%以上吸附滞留在地下,并且中、高渗透层吸附滞留量占90%以上,从分布规律来看,由于后续流体的冲刷,从注入井到采出井,滞留浓度逐渐增加,由于地下吸附滞留量较大,可以进一步开展地下吸附滞留聚合物再利用的可行性研究。

In order to study polymer distributing law after polymer flooding and the feasibility of polymer recycle,two three-dimensional anisotropic models of 50×50×10 cm were designed.One of the models had a clapboard to simulate the polymer distribution under multi layers condition,and one model had no clapboard to simulate polymer distribution under a single oil-bearing layer.The rule of polymer adsorption post polymer flooding was studied by analyzing the gross polymer production volume and absorption volume.The results show that more than 60% of total injecting polymer has been adsorbed,where more than 90% of total adsorption is held up by high permeability or medium permeability layers,and the adsorption content gradually increases from injecting well to picking well.The research results provide favorable evidence for recycling the adsorbed polymer.

10.3969/j.issn.1000-7393.2006.06.012