摘要
以鄂尔多斯盆地北部煤系伊24井及其周围地区煤系为对象,重点研究煤的不同显微组分特征及生烃能力。结果显示:该地区烃源岩族组成中以高含量的沥青质、中含量的非烃和芳烃、低含量的饱和烃为特征,总体上属于气源岩;有机质类型属腐殖型。煤的镜下鉴定以基质镜质组为特征,可观察到大量孢子体、角质体,但树脂体少见,且未发现藻类体。镜质组生烃潜力是壳质组的1/4,是惰质组的2.5倍,是主要的生烃组分,形成于弱还原环境。延安组主体进入低成熟阶段(R moax=0.50%～0.70%),山西组—太原组主体进入中—高成熟阶段(R moax=1.40%～1.80%)。伊24井延安组未进入主要的排烃期,山西组—太原组则进入了主要的排烃期,曾经发生了大量的排烃作用,是附近地区重要的气源岩。
The coal bearing series in the northern Ordos basin are studied to indicate the characteristics and hydrocarbon potential of different macerals.The rock samples are indicated to be gas sourcerocks that contain high level of bitumen,medium level of non-hydrocarbon and low level of saturated hydrocarbon.Macrosporinite and cutinite are observed in large quantity and less resinite and noalginate are observed under microscope,which indicates that the coal belongs to vitrinite,which was formed in weak reductive environment.Sample study shows the main body of the Yan'an Formation is in the stage of low maturity(Romax =0.50%-0.70%),and the main body formation in Shanxi-Taiyuan is in the stage of medium-high maturity(Romax =1.40%-1.80%).The well Yi-24 in Yan'an Formation is not yet in its main hydrocarbon discharging period.The latter has discharged large quantity of hydrocarbon and is the most important gas source rock in the nearby region.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2011年第S1期91-97,共7页
Journal of Jilin University：Earth Science Edition
基金
国家"973"计划项目(2006CB202202)
国家自然科学基金项目(40972106
40772095)
中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金项目(SKLCRSM09KFB01)
