塔里木盆地志留系非构造圈闭类型及有利勘探区预测

Types of Nonstructural Traps and Prediction of Favorable Exploration Areas of Silurian in Tarim Basin

通过对塔里木盆地志留纪地层沉积特征的剖析,结合志留纪沉积前古地貌研究和沉积体系研究,分析了地层超覆圈闭、地层不整合遮挡圈闭、岩性上倾尖灭、侧向相变以及火成岩圈闭等4种非构造圈闭主要类型及其形成条件。在层序地层、沉积体系展布和油气成藏条件综合研究的基础上,结合非构造圈闭的形成条件,明确了塔里木盆地志留系有利储集体展布,指出有利的勘探区带主要是围绕满加尔坳陷和阿瓦提坳陷为主。

Through analysis on sedimentary of sequence, combining with study of palaeogeomorphology and depositional systems, formation conditions and the types of non -structural traps are analyzed, they can be classified into stratigraphic overlap trap, stratigraphic unconformity trap, updip pinchout trap and igneous traps. On the basis of comprehensive research on the sequence stratigraphy, the distribution of depositional systems and hydrocarbon accumulation conditions, favorable reservoir distribution of Silurian in Tarim Basin have been defined, and the favorable exploration area has been focused on the depression, such as Manjiaer and Awat rift.