摘要
东营凹陷永北地区砂砾岩油藏储量丰富,然而由于储层非均质性强、沉积期次划分和砂体分布样式研究不够精细,影响了该区油藏评价与开发。综合运用岩心、测录井、地震等方法,建立研究区沙四上亚段砂砾岩储层构型的分级方案,总结了构型单元类型及其特征,井震综合刻画了4~5级构型单元的空间分布样式。其中8砂组主要发育近岸水下扇舌状体构型单元,辫状沟道砂砾岩整体呈退积式交错叠置分布;7砂组主要发育扇三角洲朵叶体,水下分流河道呈进积式冲刷切割与叠置分布。研究成果可为同类型地区的油藏评价与开发生产提供重要指导。
The glutenite reservoir in Yongbei area of Dongying depression has abundant oil reserves. However, because of strong reservoir heterogeneity and rough study on division of sedimentary periods and sand distribution pattern, reservoir evaluation and development in this area are significantly affected. The comprehensive methods of core, logging, and seismic were used to establish a classification scheme of the upper Es4 glutenite reservoir architecture. The types and characteristics of architecture units were summarized, and the spatial distribution patterns of level 4~5 architecture units were depicted. It is suggested that tongue-like glutenite bodies of nearshore subaqueous fan developed in 8 sand group, in which the braided gully glutenite distribute in retrogradation and staggered superposition. While the fan delta lobes develope in 7 sand group, in which the subaqueous distributary channel presents progressive erosion cutting and superposition distribution. The study results can provide important guiding significance for the reservoir evaluation and development of the similar areas.
作者
孔省吾
于正军
宋璠
王正伟
KONG Xing-wu;YU Zheng-jun;SONG Fan;WANG Zheng-wei(Geophysical Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257022,China;School of Geosciences,China University of Petroleum(East China),Qingdao 266580,China)
出处
《科学技术与工程》
北大核心
2021年第10期3978-3985,共8页
Science Technology and Engineering
基金
国家自然科学基金(41702158)
国家科技重大专项(2017ZX05009002)。
关键词
近岸水下扇
砂砾岩
储层构型
构型界面
东营凹陷
nearshore subaqueous fan
glutenite
reservoir architecture
architecture interface
Dongying Sag
