山东潍北凹陷古近系孔店组一段特征及沉积演化  

Characteristics and sedimentary evolution of the Member 1 of Paleogene Kongdian Formation of Weibei Sag in Shandong Province

作　　者：陈世悦[1] 王玲[1] 周清波 白静波[2] 李文涛[3] 孙廷彬[1] 韩敏[3] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油勘探开发研究院,北京100083 [3]中国石化胜利油田地质院,山东东营257061

出　　处：《古地理学报》2012年第5期553-564,共12页Journal of Palaeogeography：Chinese Edition

摘　　要：综合运用岩心、钻井、测井及地震资料,对潍北凹陷古近系孔一段的地层特征及沉积演化进行研究。结果表明:潍北凹陷孔店组一段可以划分为3个亚段、11个砂层组。在西部鄌郚—葛沟断裂和东部昌邑—大店断裂控制下,地层东西向发育稳定,仅在北部洼陷带地层显著加厚;在北部古城—潍河口断层控制下,地层向南部超覆,地层由北向南变薄。潍北凹陷孔店组一段主要发育扇三角洲相和湖泊相,南部斜坡带发育小范围三角洲相。孔一下亚段,物源供给充足,北部洼陷带、瓦城断阶带和灶户断鼻带发育大规模的扇三角洲相;孔一中亚段,湖盆水体变浅,物源供给减少,北部洼陷带、瓦城断阶带和灶户断鼻带继承性发育扇三角洲相,但分布范围变小;孔一上亚段,湖盆水体最浅,物源供给少,全区发育滨浅湖亚相,仅在央斜4井区和昌11井区发育小范围的扇三角洲相沉积。Based on the comprehensive analysis of cores, drilling well, logging and seismic data, the stratigraphic characteristics and sedimentary evolution in the Member 1 of Paleogene Kongdian Forma- tion in Weibei Sag was analyzed. This study suggests that the Member 1 of Kongdian Formation was divid- ed into 3 sub-members, containing 11 sand sets. Controlled by Tangwu-Gegou fault in the west and Changyi-Dadian fault in the east, the strata developed stably in the east and west, only in the northern sub-sag belt strata became thicker. Controlled by Gucheng-Weihekou fault in the northern Weibei Sag,the strata overlapped towards the south and thinned generally from north to south. Fan delta facies and la- custrine facies mainly developed in Member 1 of Kongdian Formation in Weibei Sag, and delta developed in small scale in the southern slope belt. During the development of the lower submember of Member 1 of Kongdian Formation, sediment supply was abundant, which formed the large-scale fan-deltas in northern sub-sag belt, Wacheng fault-step belt and Zaohu fault-nose belt. During the development of the middle submember of Member 1 of Kongdian Formation, the depth of water became shallower and sediment supply decreased, fan-deltas inherited the development in northern sub-sag belt, Wacheng fault-step belt and Zaohu fault-nose belt, which distributed in small scale. During the development of the upper submember of Member 1 of Kongdian Formation, the depth of water became the shallowest, the whole area developed shore-shallow lacustrine facies, and only small-scale fan-deltas developed in Wells Yangxie 4 and Chang 11.

关 键 词：山东省 潍北凹陷 古近系 孔店组一段 扇三角洲 沉积演化 

分 类 号：P512[天文地球—地质学]