Detection of geological boundaries by 3D gravity inversion for density gradients in different directions

The spatial position and dip feature of the density boundary are significant to study fault tectonic frameworks. Edge detection methods generally attach importance horizontal boundary, but it is difficult determine expressly. A gradient inversion method was proposed based on corresponding relationship among gravity forward field, kernel matrix, model attributes. result this that value different from conventional inversion. It can directly display 3D distribution features integrated with results in directions. theoretical means not only identify also qualitatively faults. has been widely applied identification Songliao Basin. According joint results, strike be quantitatively identified, respectively, making up for shortcomings sparse poor lateral resolution existing seismic data.