石油实验地质Issue(6)：767-772,779,7.DOI:10.11781/sysydz201406767
致密油储层可动流体饱和度计算方法--以合水地区长7致密油储层为例
A method of determining movable fluid saturation of tight oil reservoirs:A case study of tight oil reservoirs in seventh member of Yanchang Formation in Heshui area
摘要
Abstract
The movable fluid saturation is one of the key factors in tight oil evaluation, and can be tested accu⁃rately by nuclear magnetic resonance ( NMR) technology. The high cost and long cycle prohibited the widespread use of NMR technology to determine movable fluid saturation. The testing principles of NMR, constant⁃speed mercury injection and high⁃pressure mercury injection indicated that the relaxation time distributions, constant⁃speed mercury injection curves and high⁃pressure mercury injection curves are the reflections of pore structures and have the ingenerate consistency. The movable fluid saturations and total mercury saturations of the same sam⁃ples were tested by NMR and constant⁃speed mercury injection respectively. Correlation between the movable fluid saturation and the total mercury saturation was closely strong. The movable fluid saturation can be calculated from total mercury saturation. Considering the similarity between total mercury saturation of constant⁃speed mer⁃cury injection and mercury saturation at 7.0 MPa of high⁃pressure mercury injection, a method to determine mov⁃able fluid saturation of tight oil reservoirs was proposed based on high⁃pressure mercury injection data. The calcu⁃lation results indicated that the tight oil reservoirs, with high movable fluid saturation, are mainly type⁃Ⅲ and type⁃Ⅳ reservoirs, followed by type⁃Ⅱreservoir.关键词
可动流体饱和度/孔隙结构/核磁共振/恒速压汞/高压压汞/致密油/合水地区Key words
movable fluid saturation/pore structure/NMR/constant-speed mercury injection/high-pressure mercury injection/tight oil/Heshui area分类
能源科技引用本文复制引用
喻建,杨孝,李斌,刘小静,田建锋..致密油储层可动流体饱和度计算方法--以合水地区长7致密油储层为例[J].石油实验地质,2014,(6):767-772,779,7.基金项目
国家自然科学基金项目（41202105）资助。 （）
