碎屑湖滨带沉积总体的构成及沉积过程解释

ARCHITECTURE AND PROCESS INTERPRETATION OF LACUSTRINE CLASTIC SHORELINE DEPOSITIONAL PACKAGE

夏文臣 方艳君

Xia Wenchen Fang Yanjun

在湖泊沉积体系中,碎屑湖滨带沉积总体不仅具备反映特定沉积过程的岩性相和成因单位,而且在砂分散体系的形态和内部沉积构成上也有特色。完整的沉积层序通常由深湖相、水下重力流相、湖滨过渡相、低能滨浅湖相和高能湖滨相组成。在沉积盆地中,湖滨带砂分散体系与深湖泥岩指状交互,并具较高的孔隙度和渗透性,因此它是良好的油气储集层。

Lacustrine clastic shoreline depositional package is common in the lacustrine system.Not only it has some particular lithofacies and genetic units which present relative deposi-tional processes,but also has special features on the shape of sand-dispersal system and internal architecture.A complete sequence of lacustrine clastic shoreline depositional package consists of deep lake and subaqueous gravity flow facies,transitional zone facies,low energy shallow lake and beach facies,high energy shoreline facies.Because the sand-dispersal system of lacustrine clastic shoreline depositional package is usually interfingering with deep lake mudstone,and the sandstone has good porosity and permeability,it is a excellent reservoir for oil and gas.

10.11743/ogg19930106