Deep basin gas is an abnormal gas accumulation with characters of subnormal pressure and gas-water inversion caused essentially by its tight reservoir.
深盆气藏是一种特殊机理形成的具有气水倒置和负压异常等特征的致密气藏。
Methods A lot of basic data are used to analyze the characteristics of subnormal pressure in Linnan subsag and how it exerts influence on hydrocarbon distribution.
方法通过大量基础数据，分析了临南洼陷的异常压力特征，以及异常低压对本区油气分布的影响。
The forming mechanisms of subnormal pressure can be divided into 4 types: 1)increase in pore volume caused by tectonic uplift and formation erosion, or chemical effects of pore water;
将异常低压的形成机制归纳为4大类：1）构造抬升和地层剥蚀、孔隙水化学作用引起的孔隙体积增大；
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