The invention discloses
ellipse expansion imaging method and device of seismic
data processing under the condition of a true ground surface, belonging to the technical field of reflection seismic
data processing in
seismic exploration. The method comprises the following steps of calculating a position coordinate of a reflection point and a position coordinate of an
exposure point of a normal line of the reflection point on an offset line according to a position coordinate of a
shot point, a position coordinate of a
receiver point, a position coordinate of a
virtual image point and a position coordinate of a preset imaging position point; calculating a position coordinate of the corrected
shot point and a position coordinate of the corrected
receiver point according to a preset datum plane, a linear equation of the offset line and a position coordinate of the preset imaging position point; calculating travelling times between the
shot point and a corrected shot point, the
receiver point and the corrected receiver point as well as the
exposure point and the preset imaging position point according to speeds of media of the position coordinate of the shot point, the position coordinate of the receiver point, the position coordinate of the
exposure point, the position coordinate of the corrected shot point, the position coordinate of the corrected receiver point, the preset imaging position point and the preset datum plane, and obtaining a zero-offset time section by carrying out
ellipse expansion tangental interference and superposition according to the travelling times.