关键词: 体积CT技术, 聚合物驱, 岩心, 含水饱和度, 含油饱和度, 试验研究

Abstract: A method for determining oil and water saturations in cores by volume-CT scanner was developed on the basis of X-ray hardening treatment,X-ray drifting correction,martix transformation of imagines and position correction of CT images with volume-CT technology.It comes to the conclusion that this volume-CT technology can be used to measure the oil and water saturations in both artificial and natural cores during and after polymer flooding. Experiments indicated that there was a fingering phenomenon in the stage of water flooding,and heterogeneous water sweep channels existed clearly during water flooding.Oil saturation in water channels was obvious lower than that of other areas.The sweep volume was enlarged,and the residual oil was enriched effectively.The oil recovery was enhanced,after polymer slug was injected into the core.The application of volume-CT technology to core flooding shows that polymer flooding not only plays a very important role in improvement of sweep volume,but also enhances oil recovery,in comparison to water flooding.

Key words: volume-CT technology, polymer flooding, cores, water saturation, oil saturation, experiment