Archive
The editorial board of the "MSTU Vestnik" journal supports the «Open Access» policy which enables users to have free and unlimited access to scientific articles (to read, download, copy, distribute) in case the author is indicated when further quoted.
Warning: file_get_contents(http://doi.crossref.org/servlet/getForwardLinks?usr=murmansk&pwd=4_mstu&doi=): failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in /var/www/old/sites/vestnik/php/find_ref.php on line 2
Definition of Layered Medium Parameters on Borehole Seismic Observation Data by the Inverse Dynamic Task Method
Abstract. The given paper deals with the problem of definition of the 1-D layered medium parameters from zero-offset VSP data. The solution of the problem has two steps: first, the acoustic parameters between the receivers are defined, then the impedance and absorption below the borehole bottom are forecasted. To solve the first problem the equalities have been obtained that correlate the wave spectra with the layered parameters. As soon as the number of equalities exceeds the number of unknown parameters the method of least squares is applied and the functional minimum is achieved with the help of conjugated gradients' method. The given work shows the principal opportunity to define the strata densities and velocities within the section between the receivers. In the second part the minimum meansquare non-coincidence between the medium reaction (that is determined after the first task solution) and the reflection coefficients for the set of non-elastic horizontal layers has been defined. The conjugated gradients' method is applied to achieve the numerical solution for both problems.
Printed reference: Blyas E.A., Sereda A.-V.I. Definition of Layered Medium Parameters on Borehole Seismic Observation Data by the Inverse Dynamic Task Method // Vestnik of MSTU. 1998. V. 1, No 1. P. -.
Electronic reference: Blyas E.A., Sereda A.-V.I. Definition of Layered Medium Parameters on Borehole Seismic Observation Data by the Inverse Dynamic Task Method // Vestnik of MSTU. 1998. V. 1, No 1. P. -. URL: http://vestnik.mstu.edu.ru/v01_1_n01/articles/11_blyas.zip.
