电法勘探中异常响应特征的增强算法及其实现

摘要

In the electrical exploration, the abnormal response of the geological body may have some problems such as weak signal, not evident feature or fuzzy contour. These affect the correctness and accuracy of the geological inter-pretation. In this paper, solving the first or secondary derivative to the abnormal response contour along the direction of the gradient direction and using gradient operator or Laplace operator are applied to enhance the feature of abnor-mal response. The result of numerical forward modeling shows that this algorithm can make the abnormal center of the abnormal response contour more definite, the range of contour clearer, it proves that these methods have a positive effect on the correctness and accuracy of geological interpretation.%　　地球物理电法勘探中所获得的地下地质异常体的异常响应有时存在信号不强、特征不明显或范围轮廓模糊不清，影响了地质解释与判读的正确性和精确度。通过对异常响应等值线图沿梯度带变化剧烈的方向求一次导数、二次导数及执行梯度算子和拉普拉斯算子来增强异常响应特征，能使异常响应等值线图的异常中心更加明确，异常响应范围边缘更加清晰，这对地质解释与判读的正确性和精确度有积极作用。