Water - drive and nitrogen - drive experiments are performed to compare their displacement effects and study the displacing mechanism of ultra - low permeability reservoirs.

文中进行了水驱油和氮气驱油试验，以比较驱替效果，探究超低渗油藏的驱替机理。

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It has been proved by experiments that there's stress sensitivity in some low-permeability gas condensate reservoirs, and higher the connate water saturation, stronger the stress sensitivity.

实验已经证实一些低渗深层凝析气藏存在应力敏感性，共生水含量越高，对压力的敏感性越强。

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