石油地球物理勘探2025，Vol.60Issue(5)：1188-1202,15.DOI:10.13810/j.cnki.issn.1000-7210.20250151
基于弹-电联合岩石物理模型定量预测致密油储层流体饱和度
Quantitative prediction of fluid saturation in tight oil reservoirs based on a joint elastic-electric rock physics model
摘要
Abstract
Tight oil is a typical unconventional hydrocarbon resource,characterized by low porosity,complex mineral composition,high clay content,and difficulty in distinguishing between oil and water.At present,the evaluation of tight oil reservoirs relying on acoustic wave data and elastic properties is insufficient for accurately identifying oil-water distributions.In contrast,the combination with electrical properties can better directly re-flect them.In this study,the tight oil reservoir in the Qing Ⅱ section of Songliao Basin was selected as the tar-get.A set of 11 rock cores was collected for ultrasonic measurements and fluid sensitivity analysis of elastic pa-rameters.Well-log data from the study area were used to investigate the relationships between the elastic and electrical properties with respect to porosity and clay content.Subsequently,the elastic and electrical rock physics models with the same microstructures were constructed by using the differential effective medium(DEM)theory and the squirt flow model.The effects of porosity,clay content,and water saturation on elastic wave ve-locities and electrical conductivity were further analyzed.Finally,a 3D joint rock physics template for tight oil reservoirs was established by integrating the elastic and electrical responses of the rock.The template was cali-brated and adjusted by using the well-log data and applied to the actual tight oil reservoirs to predict porosity,clay content,and oil saturation.It is demonstrated that the constructed acoustic-electric joint rock physics model of tight oil with both fluid and structural heterogeneity can effectively interpret the acoustic and electrical data of tight oil rocks and predict the oil-water saturation of the reservoir.关键词
致密油储层/油水识别/岩石物理模型/弹―电联合特性/泥质含量Key words
tight oil reservoir/oil-water discrimination/rock physics model/joint elastic-electrical property/clay content分类
天文与地球科学引用本文复制引用
张婷,赵文智,巴晶,庞孟强,卞从胜,江青春..基于弹-电联合岩石物理模型定量预测致密油储层流体饱和度[J].石油地球物理勘探,2025,60(5):1188-1202,15.基金项目
本项研究受国家自然科学基金项目"页岩油储层多尺度岩石物理模型及参数预测方法研究"(42174161)和国家青年基金项目"非均质碳酸盐岩跨尺度数字岩心多重结构表征及波响应特征分析"(42504119)联合资助. （42174161）
