Low abundance of pr 1 ene suggests high maturity of oils from Lunnan area, which are also supported by the fact that the n alkanoic acids are much more than di n alkanoic acids in yields of asphatenes by RICO.

• 沥青质热解产物中姥鲛-1-烯的相对含量较低,RICO产物中一元脂肪酸远高于二元脂肪酸,指示该区原油具有较高的成熟度。