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水淹层测井技术,是20世纪50年代发展起来的一种测井工艺,是探测注水开发油田含水率高低、预测地下剩余油的重要技术。经过半个世纪的发展,水淹层测井技术已经形成了多个技术系列,成为为高含水油田开发中后期剩余油挖潜提供依据的重要手段。常见的水淹层测井技术有自然电位测井、激发极化电位测井、电阻率和介电测井、核测井以及复电阻率测井等。但测井出现复杂的响应特征而形成储层多解性,使得水淹层识别困难。本文对水淹层的识别方法进行了分析,对水淹层解释的困难因素、解释思路及流程进行探讨。
Waterlogging logging technology is a well logging technology developed in the 1950s. It is an important technique to detect the water cut in oilfields and predict the residual oil in the ground. After half a century of development, a number of technology series have been formed in the logging technology of water-flooded layers and become an important means for tapping the remaining oil in the mid- and late-stage development of high-water-cut oil fields. Common water-flooded logging techniques include natural potential logging, induced polarization logging, resistivity and dielectric logging, nuclear logging, and complex resistivity logging. However, the complex response characteristics of the logging result in the formation of multi-solution reservoir, making it difficult to identify the flooded layer. This paper analyzes the method of identifying waterflooded layer, and discusses the difficult factors, explanation and process of waterflooded layer interpretation.