The secondary dolomite and paleokarst of the Lower Permian Series in Sichuan Basin is one of the important atectonic reserviors in the basin.

四川盆地叠统中次生白云岩及古岩溶叠统主要非构造圈之一。

Sedimentary structures of the storm deposits are:a)hummocky crossstratification are characterized by gentlly curved, low angel cross-lamination.

同时指出风暴岩发育区良好岩性或构造一岩性圈区。

Rich hydrocarbon accumulation area is usually associated with structure-lithology trap, fault trap and lentoid sand trap.

有利圈为岩性、构造岩性、断块及断类型。