Issues of the journals for 2008 y.

The Use of Inclined Wells Data While Structural Modeling

(Novokreshchin A.V. )

The algorithm which uses horizon depth data obtained in inclined wells vs time-to-depth conversion is proposed. Two data error models - additive error model and location error model - are considered as case histories for two inclined wells drilled in different fields.......

  • 2008  № 2, pp. 65-72

The Use of First Fresnel Zone Radius in Seismic Exploration

(Zavalishin B.R. )

Wave information within the first Fresnel zone is sufficientfor the solution of an inverse problem. It means that migration velocity is also measurable with it. To make it feasible, the optical principle of imaging should be used. Absence of a smoothing effect, inevitable with multi-kilometer offsets is the main advantage of this approach. It promises more detailed images. The result, inaccessible to the usual method, is achievable due to the use of additional information in the form of a wave diffracted by the aperture.......

  • 2008  № 5, pp. 3-7

Seismic Reciprocity Justification for Layered Media. Part 3

(Denisov M.S. )

The expression allowing the computation of the geometrical spreading factor of a reflected and transmitted wave for the model of earth with locally-homogeneous layers with curved boundaries is studied, the effect of wave conversion is accounted for. The symmetrical properties of this expression prove that the seismic reciprocity principle holds true for the direct and reflected waves in layered earth andfor both the monotype and converted waves. The symmetrical properties of the reflection and transmission coefficients are studied for the monotype and converted waves.......

  • 2008  № 5, pp. 8-17

Selection of Low-Contrast Bodies in Geophysical Fields: Physical and Numerical Approaches

(Nikitin A.A. Zemtsova D.P. )

This paper is dedicated to selection of low-contrast bodies in geophysical fields. Basic attention is paid to the use of seismic attributes while structural modeling and oil saturation estimates. Adaptive energy filtration of seismic isochrones data is proposed for detailed low-contrast bodies identification, and two new seismic attributes to be used while wavelet conversion of the original seismic field - for reservoir rock saturation assessment. Numerical methods used while low-contrast bodies selection include attribute fields splitting by 2-D energy filtration into regional and local components, small anomalies detection against the background noise and integrated analysis of seismic and non-seismic attributes.......

  • 2008  № 5, pp. 18-26