摘要
加拿大Athabasca油砂矿区KN区块白垩系McMurray组中段缺乏系统的沉积特征分析。根据研究区59口井的岩心、粒度、生物遗迹、测井及高分辨率三维地震等资料,分析其沉积特征,总结沉积模式。结果表明:研究区沉积物为泥砾、砂、砂泥互层和泥等,粒度中含过渡组分,发育各种河流和潮汐成因的沉积构造及自下而上递增的过渡相生物遗迹。McMurray组中段形成于海陆交互的河口湾体系内靠近陆地一侧,是受潮汐影响的曲流河沉积,发育河床底部滞留、点坝、废弃河道和泛滥平原等微相类型。河流是正韵律下部沉积时期的主要地质营力,形成以块状层理砂为主的下点坝,是优质储层分布的位置;在正韵律的中上部,潮汐作用显现,倾斜的非均质砂泥互层IHS形成于潮汐双向水流和曲流河侧积的共同作用。该结果为优质储层评价和开发布井提供指导。
In response to the lack of systematic sedimentary characteristics analysis of McMurray Formation middle member in KN Area,Athabasca oil sand mine,Canada.The sedimentary characteristics are analyzed with the core,grain size,biological remains,well logging in 59 wells and high resolution 3D seismic data,and the depositional model is summarized.The sediments in the study area include mud gravel,sand,sand and mud interbeds and mud.The grain size contains transition components,and the various fluvial and tidal sedimentary structures and the biological remains of transitional phase which increase from the bottom up develop.The comprehensive analysis of lithology,paleontology and geophysical signs indicates that McMurray Formation middle member deposited near the land side in the estuarine bay system with the interaction between sea and land,which is a tidal influenced meandering river.The main micro facies types include bed residence at the bottom,the point bar,the abandoned channel and the flood plain.The river is the main geological force in the lower positive rhythm sedimentary period,and the lower point bar,which is mainly composed of lumpy bedding sand and the location of the high quality reservoir distribution.The tidal action manifest in the upper part of positive rhythm.Incline heterogeneous sand and mud interbeds IHS in this area is formed with the interaction of tidal bidirectional flow and meandering river lateral accumulation.The results provide guidance for high quality reservoir evaluation and well location design.
作者
王海峰
宋来明
范廷恩
汤婧
张雨晴
解超
WANG Haifeng;SONG Laiming;FAN Tingen;TANG Jing;ZHANG Yuqing;XIE Chao(Research Institute Company Litimed,CNOOC,Beijing 100028,China)
出处
《东北石油大学学报》
CAS
北大核心
2019年第5期66-76,I0005,I0006,共13页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2016ZX05031-003)
