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受盆地构造演化阶段的控制,贝尔凹陷早白垩世经历了初始裂陷冲积-火山岩盆地充填、早期裂陷冲积河流-浅湖盆层序、强烈裂陷深湖-半深湖盆层序、断坳期半深湖盆型层序及坳陷期开阔浅湖盆层序的沉积演化序列。受盆地整体格架的控制,凹陷内可划分出10个次级构造单元,各次级构造单元决定了特定的沉积相带展布。砂体的发育和分布明显受到构造格架的制约。贝西次凹、贝西单斜带和贝中次凹是有利的储集相带。
Under the control of the tectonic evolution stage of the basin, the Early Cretaceous of the Beier Depression underwent initial rift alluvial-filling of volcanic basins, sequence of early rift alluvial river-shallow lake basins, strongly rifted deep-half-deep lake basins, Sedimentary and evolutionary sequences of semi-deep basin-type sequence in the depression and open-lake basin sequence in the depression. Under the control of the overall framework of the basin, 10 secondary structural units can be subdivided within the depression, and each secondary structural unit determines a specific sedimentary facies distribution. The development and distribution of sand bodies are obviously constrained by the tectonic framework. The Bessey subduction, Bessew monoclinic and Bess subfacies are favorable reservoirs.