勘探资料证实，西湖凹陷内生成的油气由生烃深凹向西部和南部的古斜坡带运移。
The exploration data approve that the hydrocarbon in the Xihu Depression migrated from the deep depression of hydrocarbon-generating to the west and south parts of the ancient slope.
油气主要以T1，T2界面和储层的侧向运移为主导，叠置在古隆起、古斜坡之上的各类圈闭是最有利的圈闭，成藏效率高。
Oil and gas in the basin migrated laterally along T1, T2 interfaces and reservoirs. Verious kinds of traps superposed on paleo-uplifts and paleoslopes are more favourable to form oil and gas pools.
沿盆地长轴方向，在坡降缓、斜坡长的古地形等条件下，源远流长地巨大的定向曲流河携带大量的泥沙进入湖盆，在河湖作用过渡带形成曲流河三角洲沉积体。
The immense oriented meandering river, along the long axis of the depression and with the gentle declivity and long slope, carried a large amount of mud and sand into the lake basin.
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