摘要
鄂尔多斯盆地由于构造发育不连续导致形成了不同的沉积体系类型和沉积相序,小河长6油藏投产时间较长,亟需对长6油藏进行精细描述,小层划分与对比是精细油藏评价工作中最关键的步骤。通过小河油田分布特征及其横向变化,划分对比区,运用沉积旋回分级法,纵向上,按旋回级次,由大到小逐级对比,通过骨架井网的反复对比,确认对比标准层和对比原则。确立了三个标志层和两个辅助标志层,将小河油田自下而上划分为5段沉积旋回序列,对比结果旨在为鄂尔多斯盆地小河油田油藏中小层划分提供重要参考。
The Xiaohe area of the Ordos Basin,characterized by discontinuous structural development,has nurtured diversified depositional systems and sedimentary sequences.Given the long-term production history of the Chang-6 reservoir,conducting detailed reservoir description is of great importance.Based on the geological distribution characteristics and lateral variations of the Xiaohe oilfield,this study delineates the comparison areas and adopts the sedimentary cycle classification method to conduct gradual comparisons from large to small cycles in the vertical direction.Through repeated comparisons and validations using the skeleton well network,comparison standard layers and principles are established.Ultimately,Three marker horizons and two auxiliary marker horizons have been identified.the Xiaohe oilfield is subdivided into five sedimentary cycle sequences from bottom to top,providing significant reference for the subdivision of small layers within the Chang-6 reservoir of the Xiaohe oilfield in the Ordos Basin.
作者
李微
张东阁
蔡佳美
谢永龙
白保平
蒋茜
LI Wei;ZHANG Dong ge;CAI Jia mei;XIE Yong long;BAI Bao ping;JIANG Xi(Hebei Xiong'an Youxin Energy Technical Service Co.,Ltd.,Xiong'an,Hebei 071700,China;Changqing Industry Group Co.,Ltd.of CNPC Changqing Oilfield Company,Xi'an,Shaanxi 710018,China)
出处
《内蒙古石油化工》
2025年第7期120-124,共5页
Inner Mongolia Petrochemical Industry
关键词
小层精细对比
长6油藏
地层划分
标志层
沉积旋回分级法
detailed small-layer comparison
Chang-6 reservoir
stratigraphic subdivision
marker horizon
sedimentary cycle classification method
