METHOD OF SEISMIC EXPLORATION Russian patent published in 2018 - IPC G01V1/00 G01V1/28 G01V1/30 

FIELD: geophysics.

SUBSTANCE: invention relates to the geophysics and can be used in seismic surveys. Claimed is the seismic survey method, which is based on the oscillations repeated excitation, the seismic records recording, the records conversion into the media images and the differential source records or generated from such records images formation. According to the claimed method, it is proposed to carry out each subsequent excitation and registration of oscillations after the previous one with an interval of time that is in an order of magnitude shorter than the anomalous object formation time. Then, from the registered wave fields or generated from them images, form a difference after equalizing the maximum intensity of wave fields or images adjacent in time and by the difference wave field or difference image judge on the change in the anomalous object properties, its size and location in space. At that, in one of the method modifications, forming the total wave field or image by summing the difference wave fields or images, obtained by adjacent in time wave fields or images subtraction. In the another method modification, simultaneously recording the oscillations inside the medium and in the near-surface zone and, before the wave fields subtraction, their equalization is carried out by recorded inside the medium seismic records. In the another method modification, from each of the registered wave fields subtracting the wave field formed by mathematical modeling using a model of the medium that does not contain the anomalous object. Obtained in this way the differential wave fields are summed up among themselves and on the total wave field, or on the obtained from it medium image, selecting the anomalous object and judging on its properties change with time. To implement the method into production, it is proposed to use the existing seismic records standard interpretative processing packages.

EFFECT: increase in the anomalous objects selection reliability, whose properties, spatial position and size are quickly changing in time.

4 cl