• 责任者：Shen Yinmin (Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Li Yue
• 刊名：Journal of Stratigraphy
• 出版年：2013
• 卷期：37(1)
• 关键词：层序地层学 ; sequence stratigraphy ; 岩性圈闭 ; lithologic traps ; 塔里木板块 ; Tarim Plate
• 页码：p.25-32
• 图表：illus., 18 refs.
• 分类号：1003
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

The Triassic sequences in Lunnan Oil Field, Tarim Block are typically of the continental basin within depression belt of craton. Lacustrine and delta sedimentary systems are significant of the oil-gas reservoirs. Division and correlation of the sequence stratigraphic units are key aspects for the outline of the lithological trap. The present study works out the sequence stratigraphic framework based on seismic and well-measurement data. Three regional as well as multiple local reservoir-cap associations are controlled by three sequences and eight system tracts respectively. Sequence, in which lowstand system tracts and transgressional system tracts from its lower part of the sequences compose of the the regional reservoir-cap associations; meanwhile, highstand system tracts formed by lacustrine and delta mudstones from the upper part are notable regional cap layer. Tectonic factor is considerable for the trap. System tracts composed of sandstone as well as surrounding mudstone are generally of the local reservoir-cap trap and catalogued to the lithological-type traps. Synthetic seismic forecast reservoir data is favorable for the outline of the lithological trap. We will pay more attention to the local reservoir-cap units of the transgressional system tracts formed during highstand episodes.