莫里青断陷双阳组一段沉积体系分析  

Analysis on the depositional system of the first segment of Shuangyang formation in Moliqing fault depression

作　　者：刘建[1] 聂婉[1] 刘媛媛[1] 宋阳林 王蒙[1] 

机构地区：[1]长江大学地球科学学院,湖北武汉430100

出　　处：《油气藏评价与开发》2014年第3期1-7,共7页Petroleum Reservoir Evaluation and Development

摘　　要：在高分辨率层序地层学理论指导的基础上,综合应用钻井、岩心、测井和地震资料,建立该区双一段层序地层格架,实现了莫里青断陷双一段地质统层,并对层序格架内沉积相类型和沉积体系分布与演化进行了分析。研究认为,双一段为一个长期基准面上升半旋回,划分为MSC1和MSC2两个中期层序,其中将MSC2进一步划分为SSC1、SSC2、SSC3三个短期层序。莫里青双一段沉积体系分布与演化受构造活动强度变化和基准面变化的共同影响,莫里青断陷的西南部、东南部、东北部缓坡带主要发育扇三角洲沉积体系,西北部陡坡带发育湖底扇沉积体系,其它地区发育湖泊沉积体系。Based on the theoretical guidance of high resolution sequence stratigraphy, the sequence stratigraphy framework of the first segment of Shuangyang formation was established to achieve geological zonation by drilling, core, well logging and seismic da-ta. And then the types of sedimentary facies and the distribution and evolution of the sedimentary system in the sequence stratigra-phy framework were analyzed. The study showed that the first segment of Shuangyang formation in the uprising periods of the long-term base-level cycle was divided into two middle sequences, MSC1 and MSC2. MSC2 was further divided into three short sequenc-es of SSC1, SSC2 and SSC3. Because that the distribution and evolution of the first segment of Shuangyang formation in the Moliq-ing fault depression were influenced by the change of the intensity of tectonic activity and datum, the fan delta depositional systems were manly developed in the southwest, the southeast and the northeast gentle slope region, the sub-lacustrine fan depositional sys-tems were developed in the northwest actic region, and the lacustrine depositional systems were developed in the other areas.

关 键 词：莫里青断陷 双一段 高分辨率层序地层学 沉积体系 扇三角洲 湖底扇 

分 类 号：TE121.3[石油与天然气工程—油气勘探]