测井技术2025，Vol.49Issue(4)：627-635,9.DOI:10.16489/j.issn.1004-1338.2025.04.014
基于核磁共振和微分电阻率测井的致密砂岩储层油水识别方法
The Method for Oil-Water Identification in Tight Sandstone Reservoirs Based on Nuclear Magnetic Resonance and Micro-Differential Resistivity Logging
摘要
Abstract
The tight oil reservoirs are characterized by low porosity and low permeability,which leads to significant errors in oil-water identification when using traditional resistivity models.This paper proposes an oil-water identification method based on nuclear magnetic resonance(NMR)logging and differential resistivity analysis to improve the identification accuracy in tight oil reservoirs.First,a differential resistivity oil-water identification model is established using the total differential Archie's equation to reduce the influence of lithology,pore structure,and other factors on resistivity calculations.Second,a bound water saturation calculation model is constructed based on the T2 distribution from NMR logging,and the T₂ cutoff value is used to optimize the reservoir fluid property evaluation.Finally,the method is applied to the Permian tight sandstone reservoir in the Junggar basin's eastern margin,and its effectiveness in tight oil reservoir identification is verified using actual logging data.The study shows that combining differential resistivity and NMR logging can significantly enhance the accuracy of oil-water identification in tight sandstone reservoirs,providing a reliable technical approach for tight oil and gas exploration.关键词
致密砂岩/核磁共振(NMR)测井/全微分电阻率/束缚水饱和度/油水识别Key words
tight sandstone/nuclear magnetic resonance(NMR)logging/fully differential resistivity/bound water saturation/oil-water identification分类
天文与地球科学引用本文复制引用
王成荣,曾青,林茂山,杨静,邹华宝,甘力雄,邓瑞..基于核磁共振和微分电阻率测井的致密砂岩储层油水识别方法[J].测井技术,2025,49(4):627-635,9.基金项目
中国石油天然气集团有限公司项目"地球物理井地立体探测方法与装备研发"(2023ZZ05-03) （2023ZZ05-03）
中国石油集团测井有限公司项目"快速测井装备研制与配套"(CNLC2022-4D) （CNLC2022-4D）
