圈闭

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

有利圈闭为岩、岩、断块及断层类型。

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是良好岩或岩圈闭区。

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

川盆地下二叠统中次生白云岩及古岩溶是下二叠统主要的非圈闭储层之。