摘要
综合岩心观察、测井、钻井和取样分析等资料,对委内瑞拉奥里诺科重油带内Carabobo油区M区块Morichal段油层组沉积类型及沉积演化特征在垂向和平面上的展布规律进行了研究。结果表明:研究区Morichal段油层组主要发育辫状河三角洲沉积体系,以辫状河三角洲平原亚相为主,进一步可以划分为辫状河道、心滩、溢岸\决口扇、泛滥平原等沉积微相。其中,辫状河道与心滩为主要发育的沉积微相,其骨架砂体是研究区内最有利的储集体,储层的展布形态主要受控于古地貌形态和沉积微相的展布。主河道沿南西—北东方向发育,溢岸\决口扇和泛滥平原微相仅在局部少量发育。
The vertical and plane distribution laws of the sedimentary types and sedimentary evolution of Morichal member in M block,Carabobo area of Orinoco heavy-oil belt, Venezuela are studied based on core observation, well logging, drilling and sampling analysisdata. The results showed that the braided river delta sedimentary system are mainly developed in Morichal member of the study area, thebraided river delta plain subfacies is mainly developed in the braided river delta sedimentary system,which can be further divided intofour microfacies of braided channel,diara, overflow crevasse splay and flood plain. Braided channel and diara are the main sedimentarymicrofacies, and their framework sand body is the most favorable reservoir in the study area. The distribution of the reservoir is mainlycontrolled by the ancient landform and the distribution of the sedimentary microfacies. The braided channel microfacies distributes mainlyalong the westsouth-eastnorth direction,and overflow crevasse splay and flood plain microfacies is only in local distribution.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2016年第1期45-52,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05032)
关键词
奥里诺科重油带
辫状河三角洲平原
岩相特征
沉积演化
委内瑞拉
Orinoco heavy oil-belt
braided delta plain
lithofacies characteristics
sedimentary evolution
Venezuela
作者简介
陈浩（1990-），男，硕士研究生，主要从事石油地质研究。E—mail：ehenl9613@petrochina．com．cn
