将古生物中的孢粉热变指数、沉积有机质类型和井中油气化探技术中的酸解烃甲烷/重烃值,通过两种不同学科、不同研究方法有机地结合起来,共同对松辽盆地南部DB-6井的晚白垩世烃源岩类型进行油气评价。据孢粉热变指数和有机质类型的分析研究认为:明水组、四方台组、嫩江组二段和青山口组成熟好,有机质类型也好,有利于生油;嫩江组四―五段成熟好,但有机质类型较差,较利于生气;姚家组成熟度高,有机质类型也差,较利于生气。据井中油气化探资料,应用酸解烃的甲烷/重烃值,对烃源岩类型和生烃性质判别,其结论与孢粉颜色指数和有机质类型所得结论大致相同,嫩江组二段及青山口组为较好的烃源岩。

Using two different kinds of methods, i.e thermal alteration index of spore & po llen in palaeontology, orgnic type and the ratio of methane heavy hydrocarbon in  acis decomposed gas of in-well chemical exploration, the souce rocks of Cretac eous System in well DB-6 which locates at the southerm part of Songliao basin a re evaluated. According to the study of spore & pollen, the souce rocks of Mings hui formation, Sifangtai formation, Nenjiang formation and Qingshankou formation  are mature and have good organic type for oil generating. The 4~5 mbmbers of Ne njiang formation are mature with relatively bad orgnic type, and it is of gas ge nerating tendency. Yaojia formation are high mature with bad organic type, and i t is of gas generating tendency. According to the data of in-well chamical expl oration, the types of souce rock are judged by the ratio of methane to heavy hyd rocarbon in acid decomposed gas, and the results are the same as that from therm al alteration index of spore & pollen and organic type, i.e. the source rocks in  2 member of Nenjiang formation and Qingshankou formation are of relatively high  quality.