摘要
不同性质流体的核磁共振试验研究是了解岩石弛豫机理的最基础工作。设计了轻油、稠油、水样等7个样品在不同极化时间下的核磁共振试验,展示了试验结果,并进行了纵向弛豫方程形式与完全极化时间研究。研究表明:轻油、水样的纵向弛豫方程呈指数弛豫形式,而高粘度原油的纵向弛豫方程是多指数等复杂形式。原油的粘度与完全极化最小时间是相关的,粘度越大,完全极化所需时间越小。水样的完全极化最小时间介于轻油与稠油的完全极化最小时间之间。
Rock physical experiments for comprehensive NMR properties were devised including light/heavy crude oil samples and water samples under different polarization times.NMR longitudinal relaxation equation,the fully polarization time and T2 distributions of these samples under different conditions were obtained.The longitudinal relaxation equation of the light crude oil sample and water sample in this example was the single exponential form,and the longitudinal relaxation equation of the high viscosity oil was the dual exponential form or the multi-exponential form or other complex form.The crude oil viscosity and the fully polarized time are related,the higher the crude oil viscosity is,the less the time is for full polarization.The smallest fully polarized time of water samples is less than the light crude oil samples and greater than the heavy crude oil samples.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2010年第3期80-83,107,共5页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2008ZX05005-006-09HZ)
关键词
岩石核磁共振弛豫特性
岩石物理试验
纵向弛豫时间T1
完全极化时间
横向驰豫时间T2分布
rock relaxation properties
nuclear magnetic resonance(NMR)
rock physical experiment
longitudinal relaxation time T1
fully polarization time
T2 distribution
