摘要
南海北部陆架盆地渐新统煤系地层与油气有良好的亲缘关系。热模拟—气相色谱实验表明,煤岩有较好的生烃潜力,相当于Ⅱ_A型干酪根,而同层系泥岩的生烃潜力却大大低于煤岩。多方面论证,该区存在生油型及生气型两类煤岩。研究了Ⅰ—Ⅱ型煤岩,约占原始生烃量40%的烃类是在大量生烃阶段前(T_(max)<465℃)被排出,为珠江口盆地寻找煤成油田提供了依据。以产烃量(油、气)曲线、残烃曲线为依据,结合盆地数值模拟,编制了计算程序,获得了油气资源量。
In Oligocene,a s&t of coal measures deposited in shelf basins of the northern south China sea,which is well correlated with oil gas found there.Thermal simulation Pyro—GC exeperiment shows that the coals have hydrocarbon generation potential equal to Type Ⅱ_A kerogen and much higher than that of the shales at the same horizon.Several evidences have confirmed that there are 2 kinds of coals in the region ,that is oil—prone and gas—prone.In addition,geochemical study indicates that about 40% of primarily generated hydrocarbon was expelled before the peak of oil generation (T_(max)<465℃ ),which suggests potential existence of coal-originated oil field in Pearl River Mouth basin.
出处
《中国海上油气（地质）》
1990年第1期23-32,共10页
China Offshore Oil and Gas(Geology)
