圈闭

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

有利圈闭为岩性、岩性、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性或岩性圈闭区。

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

川盆地下二次生白云岩及古岩溶是下二主要的非圈闭储层之。