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The Study and Application on Methods of Elastic Impedance Inversion and Fluid Discrimination

Author: LuNa
Tutor: YinXingYao
School: China University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: Elastic Impedance Lithology parameters Parameter extraction Fluid identification
CLC: P631.443
Type: Master's thesis
Year: 2008
Downloads: 89
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Abstract


Wave impedance inversion in the poststack to use the seismic data of the full - angle superimposed of the , weaken the a the reflect the of the the sensitivity of of the reservoir characteristics of ; prestack AVO analysis of and inversion be able to to provide a a wealth of the lithology parameters , but to affected by the larger the the impact of of noise . The The elastic impedance inversion to overcome the a the the shortcomings of of the the two , not only retains the a prestack information - rich of the information , but also to affected by the noise the smaller . But , the elastic impedance is the a calculation to come out of the the amount of , the its the physical meaning of is does not clear-cut , and thus , it is need to to to carry out the the research of the rock the the physical properties parameters of the to extract in the the from the elastic impedance . The fluid identification is the the the reservoir prediction of the important the contents of , have the important the significance of of the the the research of the fluid factor method on the the fluid identification . The The The The of this article First of all expounded a the the basic theory of of the the of different elastic impedance equation of the , on the a variety of the the precision of of the elastic impedance equation carried out a contrast analysis of ; to in turn , the expounded the the the the the the basic theory of of and the key to technology inversion by by the elastic impedance ; Next, according to the the the characteristics of of the the actual seismic data of , separately in respect the extracted from the elastic impedance under the the the method of of the lithologic parameter in the two situations conducted a studied . (1) In the incident circumstances of of the Large Angle , , through pair of elastic impedance equation performing linear transform, can be from the impedance the body of the three elastic extracted directly longitudinal and transversal wave velocity and density ; after the in the it is on the parameters extraction equation to do that the proper transform , deduced the for a directly from elastic impedance in the extracted longitudinal, the the method of of the transverse wave impedance and density . ( 2 ) in the the the incident the case of of the small-angle , If the not be able to get the three angle superimposed data , through the to the a reasonable the approximate , simplify the the parameters for solving equations , is given a directly from the the the data body in the the of the the elastic impedance of the two angles to extract longitudinal , the transverse wave impedance or direct extraction of transverse wave the method of of the impedance . Thereafter, the As through the relationship between the the the different lithology parameters , and for the rest of calculate get other parameter . After the the get the a variety of lithology parameters , the , on the the fluid factor method to carried out the the analysis of research , combined with the the the analysis of of the information of wells to carried out the fluid identification . Based on the the the the fluid identification method analysis of by the AVO the reservoir of the can be a good of the to distinguish between the gas-bearing ; the method of Poisson impedance and based on the the the the fluid identification of method of of the Gassmann method In through the to select reasonable the parameters of , can be effectively to distinguish between different fluid . Finally, the the method of will be a variety of of the of this article the study in the the in the the the actual information of of the the the northeast region of Reclamation and the the Yongxin region carried out a Inspection and application . The application of the effect of show that the , the the The method is to in the the to discuss of the the in the Wen are the feasible and effective of the .

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration > > Seismic data processing and analysis methods
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