汤原断陷沉积演化及下第三系达连河组沉积相  

Sedimentary evolution of Tangyuan Rift and sedimentary facies of Dalianhe Formation of Eogene

作　　者：尚育秋[1] 钟延秋[1] 张立国[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2006年第6期30-33,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：以地震、测井、录井和岩心资料为基础,应用构造学、沉积学和地震地层学原理和方法,对汤原断陷的构造沉积演化和沉积相进行了研究。得出白垩系沉积时为断陷期,以滨浅湖-半深湖相沉积为主,到末期断陷整体抬升,白垩系遭受剥蚀。乌云组和新安村沉积时为强烈断陷期,以半深湖相沉积为主,并发育扇三角洲和湖底扇。达连河组沉积时期断陷持续拉张,断陷以半深湖和滨浅湖沉积为主,湖底扇和扇三角洲发育。宝一段沉积时期,断陷进入断坳转化阶段,半深湖相沉积为主。宝二段时期断陷遭受区域挤压,湖泊开始萎缩,断陷进入萎缩阶段,主要为滨浅湖沉积。上第三系早期湖泊急剧变浅,断陷进入消亡阶段。达连河组有利储层为扇三角洲砂体、滨浅湖滩坝砂体和湖底扇砂体。Based on seismic,well logging,borehole log and core data,applying principles and methods of tectonics,sedimentology and seismic stratigraphy,tectono-sedimentary evolution of Tangyuan Rift and sedimentary facies are studied.The result is that,as Cretaceous sedimentation period is rifting period,dominated by shore shallow lake-half deep lake sediments.At the end of the period,rift as a whole uplift and Cretaceous is denuded.Wuyun Formation and Xin'ancun sedimentation period is strong rifting period,dominated by half-deep lake facies sediments.And it develops fan delta and sublacustrine fan during this period.During the process of Dalianhe Formation depositing,fault depression continues extending,dominated by half-deep lake and shore-shallow lake sediments,developing to sublacustrine fan and fan delta.Rifting enters fault hollow transforming period in Bao Ι phrase sedimentary period,characterized by half-deep lake facies sediments.In Bao Ⅱ phrase,lakes begin shrinking so rifting enters shrinking stage,which is dominated by shore-shallow lake sediments.In early Tertiary,lakes begin rapidly to be shallow,following by rifting dying out.Favorable reservoirs are fan delta sandbody,shore-shallow beach sandbody and sublacustrine fan sandbody in Dalianhe Formation.

关 键 词：汤原断陷 断裂 沉积相 扇三角洲 

分 类 号：TE121.3[石油与天然气工程—油气勘探]