河北地质大学学报2026，Vol.49Issue(1)：32-42,11.DOI:10.13937/j.cnki.hbdzdxxb.2026.01.004
基于成因机制的鄂尔多斯盆地白266井区长2段低阻油层多参数流体识别方法
Multi-Parameter Fluid Identification Method for Low-Resistivity Oil Layers of Chang 2 Member in Bai 266 Well Block of Ordos Basin Based on Genetic Mechanism
摘要
Abstract
In the Chang 2 Member of Block Bai 266 in the Huaqing Area of Ordos Basin,the extensive development of low-resistivity oil zones has resulted in high difficulty and low accuracy in fluid identification.To address this issue,based on analytical techniques including scanning electron microscopy(SEM)and X-ray diffraction(XRD),combined with data from well testing,core analysis,and formation water analysis,this study conducts an in-depth analysis of the genetic mechanisms of low-resistivity oil zones and establishes a multi-parameter comprehensive identification methodology.First,a basic classification of reservoir fluids was performed using an acoustic time difference versus resistivity cross-plot.Next,an apparent resistivity increase ratio chart was applied to eliminate interference from lithology and salinity.Then,an invasion factor was used to quantify the radial resistivity difference between oil and water layers.Finally,the hydrocarbon-bearing potential of the reservoir was verified using the acoustic time difference and resistivity curve overlay method.Well testing validation shows that this method achieves a fluid identification accuracy of 92.9％,effectively addressing the challenge of identifying low-resistivity oil zones in the study area.It provides a reliable technical reference for reservoir fluid identification in this region and other areas with similar geological conditions.关键词
低阻油层/流体识别/视电阻增大率/华庆地区/鄂尔多斯盆地Key words
low-resistivity oil zone/fluid identification/apparent resistivity increase rate/Huaqing area/Ordos Basin分类
天文与地球科学引用本文复制引用
邵梦萍,魏钦廉,陈亮,鲍延鑫,谭成仟..基于成因机制的鄂尔多斯盆地白266井区长2段低阻油层多参数流体识别方法[J].河北地质大学学报,2026,49(1):32-42,11.基金项目
国家科技重大专项(2016ZX05056) （2016ZX05056）
