Three-component Borehole Seismic Analysis And Application Of Polarization

Borehole seismic data recorded the P-wave and S-wave at the same time, the use of synthetic three-component separation can be longitudinal and transversal wave information; Borehole seismic data includes this information: P-wave velocity, shear velocity, as well as three wave imaging section and so on. The use of such information can improve the accuracy of structural interpretation; the use of P-wave and S-wave velocity ratio of research lithology; joint use of P-wave and converted-wave travel time, amplitude, frequency and other characteristics of gas reservoirs can be carried out to identify studies; the use of S-wave up-conversion of splitting cracks can be studied, the parameter extraction, such as cracks.Well the characteristics of seismic data:(1) connecting the surface seismic data and well data of the means (time-depth data, calibration reflector);(2) direct measurement for Reservoir;(3) high-resolution imaging;(4) full-wave field, multi-component high-frequency data records.These features of high-resolution seismic reservoir characterization in the methods and techniques has played a significant role, can be used to help solve a number of enhanced oil recovery in the question of realization of scientific and rational adjustment of the development program. Therefore wells in oil field development area of the earthquake has great potential applications.This thesis analyzed and studied the vertical well and the inclined three-component synthesis of VSP technology, the basic theory, including polarization analysis of theory, analysis of time-varying polarization theory and the theory of wave field synthesis separation; and its implementation in detail the formula derived for the three-component VSP wave field synthesis laid the foundation for the separation.The use of programming environment, the level of vertical wells completed synthesis processing module orientation polarization, vertical polarization component synthesis processing module, and the covariance matrix method processing module. Through theoretical and practical information on testing, has achieved good results. Analyzed the advantages and disadvantages of both approaches and practicalTo use the three-component synthesis of zero-offset VSP after the spread downlink extracted p-wave velocity and Q value of VSP up-going wave field and three-dimensional pre-stack records one-shot test to deal with anti-Q, through the analysis, abtained a certain conclusion and understanding.