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博兴洼陷大芦湖油田沙三段中亚段二砂组异重流沉积特征
陈雁雁,林承焰,马存飞,任丽华,梁书义,王会丽,卞波
0
(1.中国石油大学(华东)地球科学与技术学院,山东青岛266580;2.山东省油藏地质重点实验室,山东青岛266580;3.胜利油田东胜精攻石油开发集团股份有限公司,山东东营257200;4.中国石化胜利油田分公司滨南采油厂,山东滨州256606)
摘要:
针对博兴洼陷大芦湖油田樊162和樊3区块沙三段中亚段二砂组沉积规律认识不清的问题,综合岩心、测井、 地震及分析化验等资料,对其沉积特征、沉积演化模式、沉积充填模式等进行系统研究。结果表明,研究区发育流 水成因的波状层理和爬升波纹层理,黑色碳质植物碎屑、红褐色泥砾和层状泥岩等陆源物质常见,逆-正粒序单元 成对出现,并发育层内冲刷面,为半深湖-深湖背景下的异重流沉积。异重流的发育主要受鲁西隆起北部三角洲影 响,是洪水沿三角洲前缘水道继续向前推进形成的。随洪水能量的变化,经历2期弱-强-弱的沉积演化过程,形成 上、下2期扇体,发育顶平底凸透镜状的沉积充填样式,且扇体顶部具有一套向物源减薄的无根细粒沉积。在综合 分析气候、地形、构造等条件的基础上,建立了内扇-中扇-外扇的异重流沉积模式。
关键词:  异重流  沉积特征  沉积演化  沉积模式  大芦湖油田
DOI:10.13673/j.cnki.cn37-1359/te.2019.04.005
基金项目:国家科技重大专项“低渗-致密油藏描述新方法与开发模式”(2017ZX05009-001),山东省自然科学基金项目“深湖相泥页岩纹层成因及其环境指示意义”(ZR2018BD014)。
Sedimentary characteristics of hyperpycnal flows in the 2nd sand group of middle Es3 Member in Daluhu Oilfield,Boxing Subsag
CHEN Yanyan,LIN Chengyan,MA Cunfei,REN Lihua,LIANG Shuyi,WANG Huili,BIAN Bo
(1.School of Geosciences,China University of Petroleum(East China),Qingdao City,Shandong Province,266580,China;2.Reservoir Geology Key Laboratory,Shandong Province,Qingdao City,Shandong Province,266580,China;3.Dongsheng Petroleum Development Stock Co.,Ltd.,Shengli Oilfield,Dongying City,Shandong Province,257200,China;4.Binnan Oil Production Plant,Shengli Oilfield Company,SINOPEC,Binzhou City,Shandong Province,256606,China)
Abstract:
No consensus has been reached on the depositional types in the 2nd sand group of middle Es3 Member in Fan162 and Fan3 Blocks of Daluhu Oilfield,Boxing Subsag. Based on cores,logging data,seismic data and analytical data,the sedimentary characteristics,sedimentary evolution and depositional model in the 2nd sand group of middle Es3 Member were systematically studied. The results show that hyperpycnal flows deposits in semideep-deep lake are regarded to mainly develop in the study area,and are characterized by:①wave cross-bedding and climbing ripples bedding formed by water flow;②a large amount of terrestrial material,such as black carbonaceous plant debris,reddish-brown mud boulder and layered mudstone;③a series of coarsening upward interval and fining upward interval always appear in pairs with inner erosion surface. The hyperpycnal flows are controlled by flood influx which transports sediments to the delta front in the Northern Luxi Uplift. Two-stage deposition caused by waxing and waning flows shows a depositional tendency from weak to strong and then to weak. The main body of hyperpycnal flow developed a lentoid filling model and the lofting facies subsided to form a set of rootless fine-grained sediments without homochronous channel in late deposition period. Based on comprehensive analysis of climate,topography,structure,etc.,the depositional model of“inner fan-middle fan-outer fan”was constructed.
Key words:  hyperpycnal flow  sedimentary characteristics  sedimentary evolution  depositional model  Daluhu Oilfield

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