The amount of coal-seam gas is mainly controlled by the depositional environment, coal evolution degree, burial depth, hydrologic condition and structural conditions.
煤层含气量主要受控于煤岩的沉积环境、煤演化程度、埋藏深度、水文条件与构造条件。
The general tectonic framework controls the form of the depression and the distribution of the depositional systems in the accommodation, which is the fundamental reservoir formation condition.
总的构造格局决定了凹陷形态与沉积物在可容纳空间内的分布，这是油气成藏的先决条件；
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