Integrated adaptive technology of kinematic inversion as applied to seismic data acquired in a heterogeneous near-surface sedimentary section

UDK: 550.834
DOI: 10.24887/0028-2448-2017-8-58-63
Key words: near-surface, velocity-depth model, kinematic inversion, seismic exploration accuracy
Authors: Yu.N. Dolgikh, V.I. Kuznetsov (NOVATEK TRC LLC, RF, Tyumen), S.K. Turenko (Tyumen Industrial University, RF, Tyumen)

Geophysical research is one of the main sources of oil and gas exploration data. Meanwhile, seismic exploration is the basis for creation of geological and, in particular, geometrical field models, their structural framework. The accuracy and reliability of seismic imaging controls the efficiency of prospecting and exploratory operations in oil and gas industry as a whole. Complication of oil and gas exploration objectives, harder conditions of field development, competitive oil market have placed increased demands to the efficiency of geophysical research.

In view of long-lasting intense field development in the West Siberia, reserves and resource-base additions there are possible mainly through search and discovery of low-relief (10-15 m) and small-size (2-5 km) prospective targets. For reliable detection and study of such targets, the RMS-error of structural imaging should not exceed 5 m. This value is to be considered a currently required level of seismic exploration accuracy. The conventional seismic studies are not capable to provide such high accuracy of the velocity-depth modeling. The most state-of-the-art approach to creation of the velocity-depth models is to perform kinematic inversion of seismic data, which converts seismic wave field parameters to geometric and velocity parameters of the features found in a geological cross-section. At present, there exist different individual solutions, elaborated to one extent or another, and separate kinematic-inversion elements capable to produce the currently required accuracy level of final velocity-depth models, but they do not solve the problem of integration, synergy and coordination between different stages, methods and levels of geophysical research.

It is necessary to develop and apply a specialized integrated technology for acquisition, processing and interpretation of geophysical data, with both technical & methodological aspects of acquiring the initial information and processing & interpretation methodic procedures, as well as methods of parameter and final velocity-depth model accuracy assessment. Further seismic-research efficiency improvement is possible through integration of the available separate solutions into one integrated adaptive technology of seismic data kinematic inversion.


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