轮南地区奥陶系风化壳岩溶系统油气成藏机制

RESERVOIRFORMING MECHANISM OF KARST SYSTEM IN ORDOVICIAN WEATHERING CRUST IN LUNNAN AREA.

作者以“油气运移动态富集”思想为指导，分析了轮南奥陶系碳酸盐岩风化壳岩溶系统油气显示和油气产出状态空间分布的规律，指出这一“油气运移成藏体系”具有大面积“汇聚式”油气运移充注特点，晚期（喜马拉雅期）充注成藏是其重要的发展阶段。提出了“高毛管阻力低浮力梯度（流体势梯度）封闭”，“网格状储集层”，动态油气成藏机制的最新认识和高产稳产井的布井原则。指出轮南奥陶系风化壳岩溶系统油气资源丰富，油气成藏具有规律性。

Based on oil and gas migration and dynamic accumulation' principle, this paper analyzed the regularity of oil and gas show and space distribution of oil and gas occurrence in karst system of Ordovician carbonate weathering crust in Lunnan area, pointed out that the oil and gas migration and reservoirforming system' is characterized by largearea convergingtype' oil and gas migration, reservoir mainly formed in late period (Himalayan period), and moreover, presented ideas of high capillary resistance and low buoyancy gradient (fluid potential gradient) confining' and meshshape reservoir', the latest knowledge of dynamic reservoirforming mechanism and well arrangement principle of highproduction and stableproduction wells. Finally, this paper considered that karst system of Ordovician weathering crust in Lunnan area possesses rich oil and gas resource and better exploration prospects.