库车盆地白垩纪沙漠沉积体系的层序地层格架

新疆塔里木北部库车盆地的白垩系,只发育下白垩统,为一套干旱红层地层.该套地层中,包括干盐湖及内陆萨布哈相泥岩、风成砂岩、间歇性河流砂砾岩和洪积扇砾岩等类型的地层,组成了一个较为典型的沙漠沉积体系.根据沙漠沉积体系的模式,针对露头剖面和钻井剖面进行了这种特殊沉积的层序地层学划分,在此基础上建立了层序地层格架.因而对红层沉积中的天然气储集层的时空展布和成因等得出了许多较为新颖的认识,具有较为重要的石油地质学意义.

Study on Sequence-Stratigraphic Framework of the Desert System for Early Cretaceous of the Kuqa Basin in Xinjiang

The Cretaceous strata in the Kuche Basin are marked by a set of arid red beds, which belong to the lower series of Cretaceous. Several types of sedimentary facies can be discerned in this strata: mudstones of the plaza and intra-continental sebkha, aeolian sandstones, sandy conglomerates of the intermittent river, sandy conglomerates of the pluvial fan etc. . These types of sedimentary facies constitute a typical desert system. Based on depositional model of the desert system, focused on outcrop sections, the preliminary divisions on sequence-stratigraphy are made on especial non-marine sedimentary stratigraph. On the basis, the sequence-stratigraphic framework for the lower Cretaceous of the Kuche Basin can be established. Therefore, the original results can be acquired concerning the space-time distributional features and cause of formation of the Cretaceous reservoirs, and thus this study means significantly for oil and natural gas exploration and development.