波阻抗反演中低频分量构建的经验与技巧

Experience and skill of constructing low frequency components in impedance inversion

1 西北大学地质学系,西安710069;2. 石油地球物理勘探局研究院,涿州072751

Department of Geology, Northwest University, Xi'an 710069

低频信息的构造是波阻抗反演中极为重要的技术环节,低频信息构造的准确与否,直接影响波阻抗反演结果的准确性。低频分量的构建要作好井资料本身的标准化、环境校正和深时转换等,还要以地质理论为指导,顺解释层位横向递推,特别要作好遇见断层、岩性突变等情况下的处理。针对不同的地质情况应当采用不同的构建方法。本文根据实践经验和生产中遇见的具体问题,提出了一套低频分量的构建方法与技巧。

The construction of low frequency information is an extremely important technical link in wave impedance inversion. The accuracy degree of low frequency information construction directly affects the impedance inversion results. To construct low frequency component, well data standardization, environment correction and depth time conversion need to be made. Moreover, horizontal recursion along the interpretation layer should be done with the guiding of geological theory. Different constructing mthods should be adopted according to different geologic circumstances such as fault and lithological mutation. This paper puts forward a set of low frequency component construction methods and techniques on the basis of the authors’ practical experiences.