一、引言在管道中测量两相流体成分的含量及其流速己日益成为重要的技术。它在石油工业及核动力工业中有很重要的应用。测量的方法很多,有γ射线吸收、电导率、电容探测等方法。而用NMR方法测量两相流体含量及其流速能自动监测,是相当精确和实用的方法。在石油开采中,从油井开采出来的原油实际上都是油水混合物,有的还含有气体。从几个油井出来的油水混合物从各条管道汇 I. INTRODUCTION Measuring the content and flow rate of two-phase fluid in pipes has increasingly become an important technique. It has very important application in petroleum industry and nuclear power industry. Many measurement methods, there are γ-ray absorption, conductivity, capacitance detection and other methods. The NMR method to measure the two-phase fluid content and flow rate can be automatically monitored, is a very accurate and practical method. In the exploitation of oil, the crude oil extracted from the well is actually oil-water mixture, and some also contain gas. The oil-water mixture coming out of several wells merges from each pipe