摘要
塔里木盆地经历了基底形成阶段、克拉通盆地阶段和前陆盆地阶段的长期构造演化。盆地发育了２２个层序界面，其中有七个区域地层不整合面，即震旦、志留、泥盆、石炭、上二叠统－三叠、侏罗、第三系底部不整合，分别发育在克拉通盆地或其上前陆盆地或二者之间。这些不整合面为海平面相对变化与构造运动的共同产物。不整合面对油气聚集有重要意义：在不整合面上下形成大量圈闭；改造了储集条件；不整合面（及其上薄层砂岩）是油气长距离运移的有利通道。有关不整合油气藏的勘探在塔里木盆地具有较重要的现实意义。
The Tarim basin has undergone a long tectonic evolutionary history, the period of thebasement formation, the cratonic basin evolution and the foreland basin evolution. The basinhad developed twenty-two sequence boundaries, among which seven regional unconformitiesoccurred, that is, the bottom uncomformity of the Sinian, Silurian, Devonian, Carboniferous,(upper Permian-) Triassic, Jurassic and Tertiary respectively, occurring in or between the cra-tonic basin and its upper foreland basins, they had resulted from the relative change of sealevel, tectonism or their interaction. The unconformities had great influence on the oil and gasaccumulation: (1) formed a lot of traps on the upper and lower of them ; ( 2) modified thereservoir conditions and (3) constituted a farway passage for oil and gas long-range migration (together with its upper laminar sandstones) . The exploration for oil and gas pools related tothe unconformities has more important and real significance.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1995年第3期14-21,共8页
Acta Petrolei Sinica
关键词
塔里木盆地
不整合
油气聚集
地层
Tarim basin unconformity craton foreland basin sea level fluctuation
