The oil or gas preservation conditions are good.Only oil or gas of S 2, 3 oil layer was preserved in general concentration subarea, it can stop the destruction of oxidization and degradation.

• 西斜坡区萨二、三油层油气在纵向上只有保存在一般浓缩亚区才能阻止氧化和菌解作用的破坏；