Abstract：Aimed at edge refined division and interpretation of potential field, we propose in the paper a new edge detection approach based on difference derivative with cosine of pseudo total gradient. We first calculate derivatives of the mean of anomaly with difference method in sliding windows. Then we import a concept of pseudo total gradient, and take the cosine of angle between pseudo total gradient and observation plane as the filter output. In the process, the maximum features on the edge position are tightened for two times, and its maximum corresponds to the geological edge. Model tests show that this method is more stable, and can better identify geological edge plane than other methods. In a pilot application, this method detects 29 faults in Hulin Basin, Heilongjiang, from which 12 faults are consistent with the result of Euler deconvolution and 7 faults were proved in the previous research.
邰振华, 张凤旭, 刘国兴, 王彦国. 基于差分求导的伪总梯度余弦值法的位场边界检测[J]. 石油地球物理勘探, 2014, 49(4): 807-814.
Tai Zhenhua, Zhang Fengxu, Liu guoxing, Wang Yanguo. Potential field edge detection based on difference derivative with cosine of pseudo total gradient. OGP, 2014, 49(4): 807-814.
