摘要
准噶尔盆地三叠系是否发育有效烃源岩一直具有不确定性。为解决这种不确定性提供参考,以盆地南缘地区三叠系暗色泥岩为例,通过进行有机地球化学分析,研究了有机质的丰度、类型和成熟度,并初步评价了其生烃潜力。结果表明,三叠系暗色泥岩有机质丰度达到了中等到好烃源岩标准;有机质来源以高等植物为主,类型为III型,也有少量II型有机质样品;有机质热演化进入成熟演化阶段,凹陷区和冲断带下盘可达到高过成熟演化;因此,三叠系是潜在的烃(特别是气)源岩,这在今后的油气勘探中值得加以重视。
Whether the effective Triassic hydrocarbon source rocks are developed in the Junggar Basin is debatable. This problem was discussed in this paper by organic geochemical studies based on a case study in the southern Junggar Basin. Abun- dance, type and maturity of organic matter were studied, which, in turn, leads to a discussion on the hydrocarbon generation potential. The results show that the organic matter abundance has reached the standard of middle to high quality source rocks. The organic matters are mainly derived from higher plants, and the kerogen is mainly typelII with some type II. The organic matters are predominantly mature, and can be highly to over mature in the depression and footwalls of the thrust faults. Thus, the Triassic mudstones are favorable for hydrocarbon （gas in particular） generation. This should be noted in the future petroleum exploration.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第2期43-53,共11页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
准噶尔盆地南缘
三叠系
烃源岩生烃潜力
有机地球化学
the southern Junggar Basin
Triassic
source rocks hydrocarbon generation potential
organic geochemistry
