一种求测井响应函数的新方法

A New Approach to Determination of Well Log Response Functions

李忠荣等．一种来测并响应函数的新方法．测井技术，１９９４，１８（３）：１６５～１７１本文介绍一种用变异函数确定测井响应函数的新方法。这种方法与通常所用数学模型或物理模型不同，它将测井曲线反映的地层参数的变化视为一个随机过程，确认地层参数变化具有的两重性，即随机性和相关性，用变异函数研究其变化特征，从而确定测井响应函数。由于它是以实际测井资料为基础进行处理和计算，其结果包含测井仪器系统自身特性、地层、井眼、泥浆、侵入等一切实际存在的环境因素的综合影响，因而响应函数具有更大的准确性和实用性。此外，这种方法不受测井种类的限制，电法、声波、放射性等各种测井资料都可以用这种方法求得各自相应的响应函数。

A new approach to determination of well log response functions using variogram is given in this paper. It is different from some traditional mathematical or physical models. Variation of the formation parameters which are involved in log curves can be viewed as a random process, and its variation has two characters: randomness and correlation. By using variogram to describe its variation, well log response functions can be derived. Since this method is based on field log information, the results include such effects as the characteristics of logging system, formation, well-hole, mud, invasion and other environmental factors. So the response functions are more accurate and more practical. In addition, this approach is not restricted to any kind of well logs. It can be used for electric log, radioactivity log, acoustic log and so on.