首页>
外国专利>
Fremgangsmåte for innsamling og prosessering av NMR-signaler for bestemmelse av fluidegenskaper i petroleumsreservoir med mer enn én fluidfase
Fremgangsmåte for innsamling og prosessering av NMR-signaler for bestemmelse av fluidegenskaper i petroleumsreservoir med mer enn én fluidfase
展开▼
机译:用于确定具有多于一种流体相的石油储层中流体性质的核磁共振信号的采集和处理方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method for determining intrinsic transverse relaxation time of a first mobile phase in a porous medium using nuclear magnetic resonance measurement sequences. The sequences are measured at first and second wait times. At least two different interecho spacing times are used for each wait time. The first and second wait time are selected to provide different magnetization recoveries of the first phase, and are selected to be longer than the longitudinal relaxation time of a second mobile phase. For the measurements made at the first interecho spacing time, components of signals in the measurements corresponding to the first phase are separated from components corresponding to the second mobile phase by determining differences between the signals measured at the first and at the second wait times. The step of separating is performed for each of the interecho spacing times. An apparent transverse relaxation time of the first mobile phase is calculated from the separated components for each one of the interecho spacing times. A relationship of the apparent transverse relaxation time with respect to the interecho spacing time is determined, and the intrinsic relaxation time is calculated from the relationship. Viscosity of the first mobile phase can be determined from the intrinsic relaxation time.
展开▼