稠油油藏高轮次蒸汽吞吐汽窜特征实验研究

Experimental Study on Steam Channeling Characteristics of Heavy Oil after High Cycle Steam Huff and Puff

稠油油藏经过高轮次吞吐后,注汽井间发生蒸汽窜流现象。文章通过物理模拟实验研究蒸汽吞吐汽窜特征,描述了高轮次吞吐后不同韵律储层蒸汽窜流在剖面上的分布特征,渗透率是主要影响因素,平面上井间蒸汽窜流形态呈扇形枝状分布,蒸汽窜流时井间平均油层渗透率上升,近井地带上升幅度高于井间。

After high cyclic huff and puff,steam channeling occurs between steam injection wells in heavy oil reservoir.The steam channeling characteristics of steam huff and puff are studied in this paper through physical simulation experiments.The distribution characteristics of steam channeling in different rhythm reservoirs on the prof ile after high cyclic huff and puff are described.The permeability is the main influencing factor,and the shape of steam channeling between wells on the plane is fan-shaped branch distribution.During steam channeling,the average reservoir permeability between wells increases,and the increase range near wells is higher than that between wells.