一、前言岩心中水饱和度的准确测定,对油田储量的计算起重要作用,它直接影响着油田的开发。进入八十年代以来,在压力密闭取心过程中,用酚酞作指示剂,其目的是测定岩心中水饱和度,但不能定量计算出浸入水量。利用在泥浆中加入少量的放射性氚水作示踪剂,是近代在石油开发方面摸索出的一种先进方法。它可以根据浸入岩心后的含氚泥浆,通过蒸馏的方法,将岩心中的水全部蒸出,然后用 LS-9800液闪仪测定蒸馏水中的氚浓度,即可算出泥浆水浸入岩心中的量。从岩心总的 I. INTRODUCTION The accurate determination of water saturation in the core plays an important role in the calculation of oil reserves, which directly affects the development of oil fields. Since the 1980s, phenolphthalein has been used as an indicator in pressure-tight coring to determine the water saturation in a core, but the amount of water infused can not be calculated quantitatively. The use of a small amount of radioactive tritiated water as a tracer in the mud is an advanced method developed in the field of petroleum development in the modern era. It can calculate the amount of muddy water immersed in the core based on the tritiated mud immersed in the core, by distilling all of the core water out of the core, and measuring the tritium concentration in the distilled water using a LS-9800 flasher . Overall from the core