层序地层格架下岩性-地层油气藏成藏与分布--以南苏门答腊盆地北部为例

Formation and distribution of litho-stratigraphic reservoirs inside sequence stratigraphic framework,north of South Sumatra Basin

南苏门答腊盆地是在欧亚、印度洋-澳大利亚、太平洋三大板块交汇处发育起来的新生代弧后裂谷沉积盆地,经历了一次完整的海进—海退旋回,发育冲积扇、河流、三角洲、浅海碳酸盐岩等多种沉积体系。应用层序地层学理论和研究方法,厘定南苏门答腊盆地北部新生代层序地层格架,分析层序地层格架与成藏要素之间的关系。地层层序发育演化的规律性与旋回性控制了烃源岩、疏导体系以及储集层、盖层发育的位置和组合方式。岩性-地层油气藏在层序中的分布与烃源岩成烃演化、储集层展布、生储盖组合型式及疏导体系等地质条件密切相关,是有规律的,是可以预测的。南苏门答腊盆地北部发育3大类8亚类岩性-地层油气藏,构成盆地油气储量接替的重要勘探领域。

South Sumatra Basin is a Cenozoic back-arc rifted depositional basin developed at the joining point of Eurasian-Asian,Indian-Australian and Pacific plates.It experienced an integral cycle of transgression-regression,resulting in multiple depositional systems including alluvial apron,river,delta and shallow-sea carbonate.The sequence stratigraphic theories and research methods were used to define the sequence stratigraphic framework of Cenozoic formations in the north of South Sumatra Basin and to analyze th...