石油钻采工艺2025，Vol.47Issue(6)：720-728,9.DOI:10.13639/j.odpt.202507012
鄂尔多斯盆地陇东地区长8致密油储层可动流体赋存与动用特征
Research on the distribution characteristics and utilization patterns of mobile fluids in Chang 8 tight oil reservoir,Longdong area,Ordos Basin
摘要
Abstract
Fluid mobility in tight reservoirs is an important indicator for assessing the potential and difficulty of reservoir development.To quantitatively analyze the distribution characteristics and utilization patterns of the fluid in the tight reservoir of Chang 8 oil layer in Longdong area of Ordos Basin,a combined method of water flooding experiments and nuclear magnetic resonance scanning was adopted to test the core samples from the reservoir and analyze the distribution patterns and utilization characteristics of the fluid in the pore throats with various scales.The results show that the reservoir pore throats in the study area are predominantly composed of micropore smaller than 0.1 μm and small pores ranging from 0.1 to 1 μm.The saturation of the mobile fluid is significantly affected by the pore throat structure.The samples dominated by micropores exhibit lower mobile fluid saturation.In the process of displacement,majority of the mobile oil is developed in the early and middle stages.As the injection pore volume increases,the displacement efficiency gradually decreases.Pore throats sized 0.1 to 1 μm are the main occurrence spaces of mobile fluids.With the improvement of reservoir physical properties,the proportion of micropores gradually decreases,but pore throats larger than 0.1 μm remain the main occurrence locations for mobile oil.This research provides theoretical support for the evaluation of Chang 8 tight oil reservoir and the optimization of waterflooding strategies in Longdong area of Ordos Basin.关键词
致密砂岩/长8储层/孔喉结构/可动流体/核磁共振/水驱效率/鄂尔多斯盆地Key words
tight sandstone/Chang 8 reservoir/pore throat structure/mobile fluid/nuclear magnetic resonance/waterflooding efficiency/Ordos Basin分类
能源科技引用本文复制引用
CHEN Kun,SHI Jianchao,WANG Di,XU Chuan,WANG Fang,FENG Yongjian,ZHANG Handan,DING Shuaiwei..鄂尔多斯盆地陇东地区长8致密油储层可动流体赋存与动用特征[J].石油钻采工艺,2025,47(6):720-728,9.基金项目
国家自然科学基金"数据与模型融合驱动的油藏CO2驱埋协同智能高效优化方法研究"(编号:52474044) （编号:52474044）
陕西省自然科学基础研究计划"数据-模型融合驱动粒子群算法的压裂水平井立体井网多维智能优化方法"(编号:2024JC-YBMS-328). （编号:2024JC-YBMS-328）
