河北地质大学学报2025，Vol.48Issue(5)：57-66,10.DOI:10.13937/j.cnki.hbdzdxxb.2025.05.007
鄂尔多斯盆地元东地区富县组低渗油藏剩余油分布主控因素研究
Study on the Main Controlling Factors of Remaining Oil Distribution in Low-Permeability Reservoirs of the Fuxian Formation,Yuandong Area,Ordos Basin
刘卫东 1谭成仟 1刘心如 1王福龙 1郭怡妮 1祝雨芬1
作者信息
- 1. 西安石油大学 地球科学与工程学院,陕西 西安 710065||西安石油大学 陕西省油气成藏地质学重点实验室,陕西 西安 710065
- 折叠
摘要
Abstract
The Yuandong Fuxian Formation reservoir in the Ordos Basin represents a typical low-to ultra-low permeability reservoir with strong heterogeneity.Currently in the high-water-cut stage of late development,it exhibits significantly reduced recovery efficiency,necessitating urgent research on remaining oil distribution patterns.This study integrated core analysis,thin-section identification,scanning electron microscopy(SEM),and petrophysical testing.Using Petrel software,we constructed structural,sedimentary microfacies,and property models for the primary oil-bearing layer J1f2 member of the Fuxian Formation.tNavigator-based numerical simulation achieved less than 10%errors in both volumetric matching and historical production curve matching,clarifying remaining oil distribution characteristics and controlling factors.Research results indicate:remaining oil distribution is primarily controlled by dual structural-lithologic trapping,manifesting as isolated potato-shaped blocks near reservoir margins;high-density flow barriers/baffles in the western section create laterally confined enrichment zones adjacent to these discontinuities;significant permeability contrasts form thief zones,concentrating remaining oil in banded patterns along both flanks of high-permeability streaks;and injection-production imbalance within specific well patterns results in localized remaining oil retention due to poor sweep efficiency.These findings offer crucial insights for efficient development of low-permeability reservoirs and targeted remaining oil recovery.关键词
鄂尔多斯盆地/富县组/低渗油藏/剩余油分布/地质建模/数值模拟Key words
Ordos Basin/Fuxian Formation/low-permeability reservoir/remaining oil distribution/geological modeling/numerical simulation分类
天文与地球科学引用本文复制引用
刘卫东,谭成仟,刘心如,王福龙,郭怡妮,祝雨芬..鄂尔多斯盆地元东地区富县组低渗油藏剩余油分布主控因素研究[J].河北地质大学学报,2025,48(5):57-66,10.
