气顶稠油油藏气驱(窜)特征及平复对策

Gas drive (gas channeling) features of gas cap heavy oil reservoir and countermeasures against

高3块为中深、巨厚、块状、高孔、高渗气顶底水稠油油藏，气顶具有较大的驱油能量，在油田井网调整及热力采油过程中．先后发生气顶横向驱油及纵向气窜。通过对气顶气开发历程、阶段特点进行了综合论述，对油井气窜的的响因素及合理利用气顶能量控制油井气窜的主要技术措施进行了研究。实践证明，气顶稠油油藏实施油气平衡开采，发挥气顶驱油作用，有利于控制和延缓气顶气窜。

Block Gao 3 is a heavy oil reservoir which is mid-deep, thick, masive, highlyporous,highly permeable and has gas cap and bottom water. The gas cap has high energy ofoil displacement. During pattern modIfication and thermal recovery, areal gas-cap displacement and vertical gas channeling have happened in order. This paper discusses developmentcourse and phase character of gas-cap gas, studles influence factor of gas channeling in oilwell and technical measures of controlling gas channeling by utilizing gas cap energy. Practice shows that equilibrium recovery of oil and gas in gas cap heavy oil reservoir,making full useof gas-cap displacement are helpful for controlling and delaying gas channeling.