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在油田开发中,储集层的水淹过程反映地质结构的特点和开采方式对多油层油藏储量开采的综合影响。对大的多油层油藏来说,实际上在整个开发期间都在陆续钻井。在研究新完钻井剖面上储集层水淹状况的时侯,地球物理测井是一个主要的信息来源。在油田注水开发过程中多采用淡水或低矿化度水。在这种情况下,就地层的电阻率和某些中子特性而言,水淹层和油层没有很大差别,从而给测井资料的解释带来很大的困难。针对这个问题,近十几年来国内外发展了碳/氧比测井、介电测井等新技术。本文综合苏联有关文献,介绍一种利用侵入带的动态特性区分油层和水淹层的方法。
In oilfield development, the process of flooding in the reservoir reflects the characteristics of the geological structure and the comprehensive impact of the mining mode on the reserve exploitation of multi-reservoir reservoirs. For large multi-reservoir reservoirs, drilling is in fact continued throughout the development. Geophysical logging is a major source of information when studying the status of reservoir flooding at a new drilling section. In the process of oilfield waterflooding, freshwater or low salinity water is often used. In this case, there is not much difference between the water-flooded layer and the oil layer in terms of the resistivity of the formation and some neutron characteristics, which brings great difficulties to the interpretation of well logging data. In response to this problem, over the past decade domestic and foreign developed carbon / oxygen ratio logging, dielectric logging and other new technologies. Based on the Soviet literature, this paper presents a method of distinguishing between oil and water flooded zones using the dynamic characteristics of invaded zones.