HPAM溶液在油藏岩石中的物化参数测定方法研究

针对某油藏,用配方研究中筛选出来的聚合物,用岩心流动实验方法评价了聚合物的注入性,提出的“串联岩心实验法”对评价聚合物溶液的注入性比传统的“多测压点长岩心实验法”简洁、方便。实验研究了聚合物在油藏岩石中的静态吸附规律,发现在低浓度段与Langmuir等温吸附规律存在明显偏差。用“双段塞法”测定了聚合物在油藏岩石中的不可入孔隙体积和滞留量,为CMG-STAR模拟器提供了相关参数,并为该油藏实施弱交联聚合物调驱可行性研究和矿场试验提供了重要依据。

MEASURING METHODS FOR PHYSIOCHEMICAL PARAMETERS OF HPAM ON RESERVOIR CORES

The injectivity of the selected HPAM on the Qizhongdong reservoir cores was investigated by core flow experiments in laboratory. The so-called Serial-Core method proposed in this pa-per is very simple and convenient than the Long-core test in injectivity evaluation experiment. The static adsorption behavior of HPAM on reservoir rocks was also investigated. The result shows that the measured volume is much lower than that calculated from Langmuir equation within low polymer concentration region. Impenetrability Pore Volume(IPV) and polymer retention were measured by Double-Polymer-Slug method, which were subsequently input into CMG-STAR model. All of the above experiments are important to the feasibility study of weak cross-linked polymer flooding and pilot test in this reservoir.