摘要
胡尖山地区位于鄂尔多斯盆地陕北斜坡中北部,该地区侏罗统延安组是一套河流和湖泊为主的碎屑沉积。沉积相分布是油气成藏控制的重要条件,为了分析胡尖山地区延9储层的沉积相主要类型和分布特征,此次研究从工区内大量的取芯井岩芯观察与描述入手,以取芯井为基础,对取芯井段进行精细的沉积微相判识和标定,结合测井资料,确定它的沉积亚相为辫状河平原亚相。可划分为辫状河道,河道间沼泽,河漫湖泊等微相类型。沉积相分析是研究砂体分布的关键技术,沉积相确定的正确与否直接影响着对砂体分布规律的认识。
The Hu Jianshan area is located in the Erdos Basin North Shanxi fall Mid-north,the region Jurassic Yan'an is a group consisting mainly of rivers and lakes clastic deposition.Sedimentary facies distribution is an important condition for control of hydrocarbon accumulation.In order to analyse the types and distribution characteristic of Yan 9 main reservoir facies in Hu Jianshan areas,this research starts from a large number of coring wells observations and descriptions of the core in hand and is based on well core,then the coring wells section's fine microfacies indentification and calibration are done.At last in combination with,logging information,the depositional sub-phase of braided river plains subfacies is determined.It can be divided into brained river channel,between marsh land,alluvial lake micro-phase type.The sedimentary facies analysis is the key to the study on sand distribution.Understanding of the sand distribution is directly affected by the analysis of the sedimentary facies.
出处
《新疆石油天然气》
CAS
2008年第3期13-16,共4页
Xinjiang Oil & Gas
关键词
鄂尔多斯盆地
沉积相
延安组
辫状河
Ordos Basin
sedimentary facies
Yan'an formation
braided river
