地震波衰减参数提取方法分析与应用-地球探测与信息技术专业论文.docxVIP

成都理工大学硕士学位论文 成都理工大学硕士学位论文 results of previous studies based on numerical simulations and the calculation of quantities of measured data analysis, to obtain wave absorbing the pulse transmission method (with the spectral ratio equivalent) and the parameters of seismic attribute analysis method in-depth study of these two methods of application conditions, factors and application of results. The theoretical study, the actual testing of rock samples and two 8 wells in the reservoir region attribute extraction scripts wave analysis, the bulk of research results obtained. Fruitful results of this integrated refining, come to understand the following points: wave absorption coefficient and reservoir properties of rock samples or variation between the understanding of: Q values of rock samples saturated by water saturated air than a large, full oil and saturated rock sample Q values are almost equal, with Q values that are difficult to identify the size of oil and water. rock Q value decreases with temperature, the increase of pressure, and vice versa. Time-frequency properties in the seismic wave analysis, the frequency attenuation gradient of K, the high frequency band width of the low frequency band width ratio Δw , Q value and so the structure and containing fluid with the reservoir, reservoir effective thickness, porosity and change . From 8 wells in the reservoir section of synthetic seismograms calculated wavelet analysis, recognized that: Three wells in Sichuan, the variation: the effective thickness of a large reservoir, porosity, high-capacity wells is small and Δw large value, K value is large. changes in the South China Sea five well pattern: the Q value is less than oil reservoir water level, the more oil content, Q value is smaller; Oil reservoir Δw is larger than the aquifer Δw , the more oil, the greater Δw , the more water , the less Δw . Different methods for constant velocity assumption understanding of adaptation: Pulse transmission method: In the lab