论文部分内容阅读
目前通行的热成熟理论认为,生成大量石油(能被生产、收集并用作燃料或原料的油和气)的生油层,其温度不得低于200°F,埋深一般要求10000ft左右。然而,天然的地质证据往往表明,石油产生于几百英尺深的地层内,较之热成熟理论所要求的温度低得多,深度也浅得多。而且,目前已知至少有一些甲烷(如沼气)可由未成熟的生油岩生成,这些通常称之为生物气。因此,大多数石油的生成可能服从旧的生物成因论,
The currently popular theory of thermo-maturation argues that a formation that generates large amounts of oil (oil and gas that can be produced, collected, and used as fuel or feedstock) must have a temperature not lower than 200 ° F and a typical depth of about 10,000 feet. However, natural geological evidence often indicates that oil is produced in formations hundreds of feet deep, at a much lower depth and at a much shallower depth than the thermal maturation theory requires. Moreover, it is currently known that at least some methane, such as biogas, can be generated from immature oil-derived rocks, commonly referred to as biogas. Therefore, most petroleum generation may obey the old theory of biogenesis,