聚合物驱不可入孔隙体积效应的室内研究及应用评价

发布时间：2018-03-27 07:47

本文选题：不可入孔隙体积　切入点：双段塞浓度剖面　出处：《成都理工大学学报(自然科学版)》2017年02期

【摘要】：基于聚合物互溶驱替和弥散渗流原理,利用双段塞浓度剖面法测定了聚合物溶液在长庆油田侏罗系延10储层6块岩心上的不可入孔隙体积(IPV),考察其对聚驱效果的影响。结果表明,聚合物溶液在6块岩心上的IPV值为20.6%~27.9%,平均为24.8%。岩心渗透率越高,IPV值越小,二者呈明显的线性负相关关系。IPV值与孔隙度无明显对应关系。不可入孔隙体积的大小反映聚合物分子线团与储层孔喉大小的匹配程度。M区块延10油藏聚合物驱试验结果表明,考虑聚合物驱过程中不可入孔隙体积效应的存在,在矿场注入工艺设计时适当提高注入量和增加前置保护段塞,有利于提升驱油效果。聚合物驱方案设计时考虑不可入孔隙体积效应是必要的。
[Abstract]:Based on the principle of polymer dissolving displacement and dispersion seepage, The inaccessible pore volume (IPV) of polymer solution in 6 cores of Jurassic Yan 10 reservoir in Changqing Oilfield was measured by using two-slug concentration profile method. The effect of IPV on polymer flooding was investigated. The IPV value of polymer solution on 6 cores is 20.627.9, with an average of 24.80.The higher the core permeability, the smaller the IPV value. There is a significant linear negative correlation between them. There is no obvious correlation between IPV value and porosity, and the size of inaccessible pore volume reflects the matching degree of polymer molecular coil and reservoir pore throat size. The results of polymer flooding test in Yan 10 reservoir in block M show that, Considering the existence of pore volume effect in polymer flooding process, the injection volume and the pre-protection slug should be increased in the field injection process design. It is necessary to consider the inaccessible pore volume effect in polymer flooding scheme design.
【作者单位】：中国石油长庆油田分公司油气工艺研究院;低渗透油气田勘探开发国家工程实验室;西安长庆化工集团有限公司研究所;
【基金】：国家科技重大专项(2011ZX05013-005)
【分类号】：TE357.46

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