圈闭

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

有利圈闭为、构造、块及类型。

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

同时指出风暴发育区是良好或构造一圈闭区。

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及古溶是下二叠统主要的非构造圈闭一。