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TECHNOLOGIES OF MULTIWAVE SEISMOLOGY OF CURVILINEAR AND STEEPLY INCLINED SEISMIC BOUNDARIES
Yu. A. Romanenko, V. P. Garin, M. L. Shemyakin, L. A. Iskandàrova
Inverse traveltime problem of seismic exploration for subhomogeneous model of an environment is being solved using the survey of multivariate investigated fragments (IF) of boundary with their positioning to given scan points (SP). The calculation of m coordinates of receiver point (RP), lengths of raypaths and wavelets traveltime in geophone position are made by known coordinates of SP and sources positions (SPos) of seismic energy by sweeping of q angles of radar incline and V velocities. From each of mn of radar beams (where n is CDPs order) on mn seismic traces are being read by ρ indications of train wave phase. Unlike known technologies the increase of IF image reliability of curvilinear and steeply inclined seismic boundaries are provided for removal of random errors, owing to the use of ρmn-measured vector of IF, and systematical errors are being eliminated by task of moveout equation. Histograms of global goal function Fρmn(q, V) are used in mono/ multiwave seismology for overview of totality of various types of secondary waves, coming from IF and q and V corrections. The development is covered by 5 patents of the RF.
Key words: CDP survey, multiwave seismology, inverse traveltime problem, curvilinear boundaries, steeply inclined boundaries.
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