The formation of oxygen precipitates and threading dislocations in top Si layer could be avoided by low temperature annealing.
低温退火可以避免在顶部硅层中氧沉淀及延伸位错等缺陷的形成。
Basal overlapping, top denudation, and facies variation between them are evident in Shahejie Formation, thus multiple layer systems and various types of non-structural traps can be formed.
沙河街组底超、顶剥、中间相变明显，易形成多个层系、多种类型非构造圈闭。
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