The major storage space and fluid channel of Ordovician reservoir is hypogenous fracture-cavern.It can make high production after erodent buildup.

• 摘要奥陶系储层流体的存储空间和流动通道主要是次生溶洞和裂缝，这些裂缝往往经过溶蚀改造，故可以形成很高的产能。