摘要
为查明黄洛区域延长组中下油层组沉积砂体的物源方向,在岩心、野外露头及分析化验资料研究的基础上,分析古水流方向,总结轻、重矿物和岩屑类型的平面展布特征,探讨研究区延长组中下油层组的古水流方向及物源方向。结果表明:鄂尔多斯盆地三叠系延长组中下油层组岩石类型主要为岩屑长石砂岩,其沉积时期古水流以南—北和东南—西北方向为主,轻、重矿物及岩屑分析显示的物源方向一致,即研究区的北部地区,由于地处沉积坳陷中心位置,具有明显的混源区物源特征,整体物源主要来自南部和东北部。该研究对分析研究区的砂体展布规律、有利区判断及下一步勘探开发具有指导意义。
Huangluo area is a key area for oil and gas exploration.In order to find out the source direction of the sandbody in the middle and lower reservoirs of this area in Yanchang formation,ancient water flow direction and source direction are analyzed in detail based on a large number of cores,outcrops and analytical data.The results show that the rock types in the middle and lower reservoirs of the late Triassic Yanchang formation in the Ordos basin are mainly lithic arkose sandstones,and the paleo-current directions are south-to-north and southeast-to northwest at that time.The source direction is also analyzed by heavy mineral,light mineral,and lithic fragments.The northern part of the study area is located at the center of the sedimentary depression,and has more than one sources.The south and northeast direction are two major sediment resources of the interval.These are of great significance to the analysis of the sand body distribution in the study area,favorable area estimate and the exploration and development of the lower interval.
出处
《东北石油大学学报》
CAS
北大核心
2017年第4期12-23,共12页
Journal of Northeast Petroleum University
基金
延长油田股份有限公司项目(ycsy2014ky-B-09)
关键词
轻矿物组合
重矿物组合
物源分析
延长组
中下油层
鄂尔多斯盆地东南部
light minerals distributions
heavy minerals distributions
provenance analysis
Yanchang formation
middle and lower oil layer
southeast of Ordos basin
