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设计与建立了研究大尺度溶洞内近井地带油水两相流动特性的可视化实验系统,通过摄像机记录了水锥从形成到突破油层的过程,研究了水锥产生的机理和演变特性,同时得到了水锥高度与油层厚度随流量的变化关系。实验结果表明:水锥形成初期,油水界面存在轻微波动;水锥变化过程中,出现锥顶凹陷;底水突破油层时,锥顶处油水存在轻微混合;水锥高度与油层厚度变化率随流量的增大而增加。
A visual experimental system for studying the flow characteristics of oil-water two-phase near-wellbore in a large-scale karst cave was designed and established. The process of water coning from formation to breakthrough of the oil layer was recorded by a video camera. The mechanism and evolution characteristics of the water cone were studied. The relationship between the water cone height and reservoir thickness with the flow rate changes. The experimental results show that there is a slight fluctuation in the interface of oil-water at the initial stage of water cone formation, cone-top depression in the process of water cone change, slight mixing of water and oil in the cone cone when the bottom water breaks through the oil layer, Increase and increase.