Methodology of VSP data processing
Vertical seismic profiling is a powerful and widely implemented method of seismic exploration. It suggests a lot of opportunities for detailed reservoir study including velocities and anisotropy estimation, direct impulse shape registration, timedepth correlation, multi-wave analysis and imaging. These advantages of the VSP method are well known but often they become severely spoiled as a result of inappropriate processing techniques. In this paper we establish a number of general principles of VSP data processing and particularly for accurate wave field decomposition that ensures the high quality and reliability of acquired results of processing and interpretation. Examples of real VSP data processing are also presented to illustrate the application of the proposed techniques.
VSP data processing based on 1D-3D model of medium.
The conceptual VSP-oriented 1D-3D model is presented as convenient base of VSP processing and interpretation. The results of processing confirm the efficiency of technology in various applications.
Optical rotatory dispersion and absolute configuration—III
Abstract Optical rotatory dispersion measurements on pyrrolidine, piperidine, and tetrahydro-isoquinoline alkaloids indicate that the absolute configuration of the α-asymmetric center may be assigned directly from the dispersion curve, provided either that the nitrogen atom is not protonated, or that the compound contains a chromophore absorbing above 200 mμ.