The deep gas reservoir in Dongpu sag has features of deep, fine lithology, tight, thin, low porosity and low permeability.
东濮凹陷深层气具有储层深、岩性细、致密、层薄、低孔隙度和低渗透率等特点。
When studying the conventional deliverability analysis of the tight gas reservoir, the tight gas reservoir will always need long test time to stabilize due to its low permeability.
对致密气藏进行常规产能分析时，由于渗透率极低，要达到稳定通常需要很长的测试时间。
This paper reviews the forming reasons of extremely low permeability of tight sandstone gas reservoir, including congenital aggradation and acquired diagenesis.
论述了致密砂岩气藏特低渗形成的原因：即先天的沉积因素和后天的成岩作用等。
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