The asphaltum and oil seepage occur in outcrops generally as liquid crude oil, sometimes as dense oil, and rarely as solid asphaltum.

• 研究区野外沥青油苗主要存在液体原油、稠油和固体沥青三种产态,其中以固体沥青最为多见,其次为液体原油,稠油最少见。