波阻抗反演中低频分量的构造方法

The construction method of low frequent component in seisimic inversion

根据生产中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问题，认为低频分量的构造不仅要做好测井资料本身的标准化、环境校正和深时转换等工作，还要依据地质理论为指导顺解释层位横向递推，特别是遇见断层、岩性突变要正确处理；针对不同地质情况应当采用不同的构造方法。提出了在复杂地质条件下利用声波测井资料递推、构造低频分量时的方法和技巧。”即要确保地震资料与测井资料的最佳匹配，测井资料的标准化处理，选择构造平缓方向构造低频分量和进行反演，选择岩性横向稳定的层位作为起始层位，精细解释层位和确定低频分量横向内插和外推的权函数等。

Constructing low frequent information correctly or not will directly affect the accuracy of inversion result. The construction of low frequent component will not only do well-log standardization, environment correction and depth to time change well, but also make recursive low frequent component on horizontal orientation along the seismic interpretation layer according to geological theory. When facing fault, lithological mutation or other special geological circumstances, different constructing methods must be adopted. The methods and skills to construct low frequent component are advanced. These are how to make well--log match the seisimic data and standardize well information, selecting plain layer to construct low frequent component and make inversion,selecting stable lithological layer as start layer of inversion, interpreting layer accurate and defining inside and outside weight function correctly.