华北中、新元古界层序地层分析及其应用

以北京十三陵中、新元古界层序地层研究为主，综合燕山东段、太行山中北段和蓟县中、新元古界典型沉积层序特征，建立了华北中、新元古界标准层序地层剖面，并探讨了其沉积层序发育特征。在华北中、新元古界内识别出５个大层序（Ｍｅｇａｓｅｑｕｅｎｃｅ）和１９个层序（Ｓｅｑｕｅｎｃｅ），从成因的角度重新认识了华北中、晚元古代地层。中、晚元古代地层中普遍存在着沉积间断和地层缺失。对中、新元古界沉积层序级别和周期进行了研究。研究认为，中、晚元古代沉积层序周期比相同组别中、新生代沉积层序周期长。在层序地层研究基础上，对华北中、新元古界有利生油层、储集层和盖层的纵向分布进行了预测。高水位期形成的白云岩相带、古风化壳和沉积间断面是重要的储集层；对有利生、储、盖组合应注重其多旋回性的研究，众多不同规模和级别的沉积间断对原生油气藏起到破坏作用。此研究为华北中、新元古界生储盖层评价预测提供了新的依据。

TX SEQUENCE STRATIGRAPHY AND ITS APPLICATION IN OIL AND GAS EXPLORATION OF THE MESO AND NEO PROTEROZOIC IN NORTH CHINA

The stratigraphic profiles of the Meso proterozoic and Neo-proterozoic in north China are developed,and their properties of deposition sequences are discussed. The five megasequences and nineteen sequences are distinguished in the Meso and Neo-proterozoic in north China,and the stratum of Meso and Neo-proterozoic was recognized again in the point of genesis view. The result shows that hiatus and lost record are universally in existence. The period of Meso and Neo-proterozoic is longer than that of Meso and Neo-zoic era. Based on the study of sequence stratigraphy, the longitudinal distribution of favorable source-bed, container rock and cover has been forecasted.The dolomite facies tract formed during high systems tract, paleocrust of weathering and hiatus are important reservoir beds. The study should pay more attention to cyclicity for favorable assemblage of source bed, container rock and cover.The most of hiatuses with different orders and ranges destroyed the original oil and gas accumulation.