气泡卡断过程中的喉道液领形态与聚并模型

Shape and coalescence model of liquid collar in pore?鄄throat during snap?鄄off

孟也 李相方 何敏侠 蒋明洁3

中国石油大学（北京）石油工程教育部重点实验室，北京 102249 中国石油大学（北京）油气资源与探测国家重点实验室，北京 102249 中国石油冀东油田分公司南堡作业区，河北 唐海 063200）

MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China Nanpu Oilfield Operation Area, Jidong Oilfield Company, PetroChina, Tanghai 063200, China)

在毛细管中用气体驱替润湿流体时，被驱替的流体通常会在管壁上留存一层薄液膜。气泡周围的润湿相液膜对于两相流中的流体运移起到关键作用，特别是气泡在孔隙喉道处的分离。此类液膜的存在，对于孔隙尺度的流动机理建模具有重要影响。文中通过建立气泡卡断过程中润湿流体在孔隙喉道聚并形成的液领形态模型，于结果分布中得到一条液领形态演变路径，可研究卡断现象的动态特征；随后通过建立液领聚并模型，计算得到液领聚并（卡断）时间。液膜厚度和卡断时间与实验结果相符，证明了模型较合理，精确度较高。

When a wetting fluid is displaced by non?鄄wetting gas in a capillary tube, a thin film of wetting fluid is often left behind on the tube walls. The film of wetting phase that surrounding a bubble has a critical influence on fluid transport for two?鄄phase flow, especially on bubbles breaking up in pore?鄄throats. The existence of such a liquid film has a great influence on the modeling of flow mechanism at pore?鄄scale. By establishing the shape model of liquid collar that formed by wetting fluid collection in pore?鄄throat during snap?鄄off, an evolvement path of liquid collar is obtained in the distribution of model calculation outcomes, which can be utilized to study the dynamic characteristics of snap?鄄off. Then a model of liquid collar coalescence is derived, and the collar coalescence(snap?鄄off) time is able to be acquired. The liquid film thickness and snap?鄄off time calculated by the coalescence model agree with the experiment results, which verified the reasonability and precision of the model.

:10.6056/dkyqt201905019