Abstract: In order to quantitatively describe the changes of adsorption retention pore volume and Inaccessible pore volume in polymer flooding process, and provide an important basis for the optimization of Bohai J oilfield polymer flooding project, the experimental that research on polymer flooding and test of polymer output concentration is carried out according to the similarity principle, referring to the characteristic parameters of Bohai J oilfield. The experimental results show that there is preferably linear relationship between polymer solution concentration and absorbance， under the same concentration of injection polymer solution, the adsorption retention pore volume and inaccessible pore volume increase with decrease of core permeability， for the cores of same permeability, the adsorption retention pore volume and inaccessible pore volume increase with the increase of polymer injection concentration. The adsorption retention pore volume is about 0.04~0.02 PV and the inaccessible pore volume is about 0.12~0.22 PV of Bohai J oilfield.

Key words: Inaccessible pore volume, Adsorption retention pore volume, Polymer output mass concentration, Laboratory experiment, Offshore oilfield

摘要： 为定量描述吸附滞留孔隙体积和不可及孔隙体积在聚合物驱过程的变化情况，从而为渤海J油田聚合物驱方案优化提供重要依据，参照渤海J油田特征参数，依据相似原则开展了聚合物驱油以及产聚质量浓度测试实验研究。结果表明，聚合物质量浓度与吸光度具有较好的线性关系，能够较为可靠地用来计算产聚质量浓度；在聚合物相同质量浓度条件下，吸附滞留孔隙体积和不可及孔隙体积随岩心渗透率降低而增加；在驱替岩心渗透率相近的情况下，吸附滞留孔隙体积和不可及孔隙体积随注聚质量浓度增加而增加。渤海J油田吸附滞留孔隙体积为0.04~0.22 PV，不可及孔隙体积为0.12~0.22 PV。

关键词: 不可及孔隙体积, 吸附滞留孔隙体积, 产聚质量浓度, 室内实验, 海上油田