摘要
采自聂拉木—格尔木剖面三叠-侏罗系海相碳酸岩所作的一系列地质和地球化学分析表明,东巧地区的浊积灰岩是好的油气源岩。抽提物含量高于4000ppm,HI347,C_(有机)1.75％,T_(max)433℃,R°1.09％,H/C(原子比)1.08。这种浊积灰岩的有机质具有多种组分:无定形(77％),壳质组(7％),镜质组(15％),惰质组(1％),并发现油气形成及运移具多阶段性,这可能与火山及热液作用有关。
Samples collected from the Nyanamud-Golmud section of T-J marine carbonate rocks have been analyzed by a series of geological and geochemical methhods. The results show that the turbidity linestone in the Dongchao area is a good oil-gas source rock, as indicated by the following data: extract amount >4000ppm, HI 347, Corg. 1.75%, Tmax 433℃, Ro 1.09% and H/C (atomic) 1.08. Organic matter contained in this rock is diverse in composition: amorphous solid (77%), exinite (7%), vitrinite (15%) and inertinite (1%). It is also found that the formation and migration of oil and gas are of multi-stage. This may be associated with multi-episode volcanism and hydrothermal activity.
出处
《地球化学》
CAS
CSCD
北大核心
1990年第1期59-63,T001,共6页
Geochimica
