珠江口盆地下第三系烃源岩有机岩石学特征及生烃潜力

本文主要应用透射光、反射白光和荧光相结合的综合光学法对珠江口盆地下第三系烃源岩的有机显微组份进行了煤岩学鉴定及荧光参数的测试，并采用了透射电子显微镜（ＴＥＭ）新技术对镜质组份中的超微组份进行研究。通过热解模拟剖析了不同显微组份组合烃源岩的生烃潜力。（１）发现了本区显微组份的独有特征，即镜质组本体中镶嵌有丰富的壳质和腐泥组份，并命名为壳镜组，同时结合无定形的细分，划分了壳镜组的亚组份。（２）在高倍透射电子显微镜下对镜质组中的超微类脂体进行了划分定量。（３）盆地烃源岩共划分了三种类型、七个显微组份组合，其中Ａ２，Ｂ１是主要给合，其次是Ｂ２，明确了壳镜组和超微类脂体是主要生烃母质。（４）研究了不同显微组份组合的生烃潜力，壳镜组具有单位有机碳生烃潜力高的特点，肯定了盆地的含油远景。

Organic Petrography and Hydrocarbon Potential of Paleogene Source Rocks in The Pearl River Mouth Basin

tential of different assemblages of macerals was studied. The hydrocarbon potential per unit orgyi ccar-bon of the exino}itrinites is high which proves the oil and gas prospect in the PRM B.Coal petrographjcal identification and fluorescence testing for organic macerals of Paleogene sour cerrocks in the Pearl River Mouth Basin( PRMB) were carried out by using com prehersive microscopymethod of combining transmitted light, reflected light and fluorescent light. The new technology ofTransmitted Electronic Microscope( TEM)was also applied to study ultramicroliptinites invitrinites. Py-rolysis simulation was used to evaluate the hydrocarbon potential of source rocks with different composi-dons of organic macerals.(1),A unique feature of macerals in the studied area was discovered, i. e. richexinites and sapropellinites are endedded in the vitrinite, and a new name, exino-vitrinite was given forthis kind of maceral. The exino-vitrinite was further divided into submacerals through integrating finerdivision of the amorphous;(2),Ultramicroliptinites were identified and quantitated under the highfoklT EM;(3),The source rocks were classified into three types and seven assemblages of organic ma corals,Among them the assenblages of A₂ and Bi are the primary ones, Bz the secondary. The exino-vitrinitesand ultramicroliptinites are the main hydrocarbon generating matter in the basin.(4),Hydrocarbon po