TN1045 : Planning validation of 3D seismic data acquisition on some syntethic geological model
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2021
Authors:
[Author], Amin Roshandel Kahoo[Supervisor]
Abstarct: Three-dimensional seismic operation perception is an important and practical tool for modeling and exploration of subsurface models of the earth. In designing a 3D seismic survey, the parameter selection must take into account a wide range of geophysical, operational and cost constraints. Today, because of the high cost of 3D seismic operations and also different limitations of seismic surveying, researchers have done a variety of studies on seismic survey modeling before the real operation. Seismic modeling for designing a seismic survey, especially at complex structures and areas, is being developed every day. Although operational limitations and survey with reasonable cost cause restrictions in choosing parameters and geometry of a survey, on the other hand, increases the necessity of modeling so that a proper model with appropriate parameters of a seismic survey could be designed. For seismic survey modeling, using available information such as the previous seismic survey data, well data and geological information the reliable velocity model is constructed. Also, the 3D seismic survey parameters are pre-designed using a conventional method. The velocity model, survey geometry, and geological information are used for seismic modeling. Illumination maps and flower plots produced by the model can be used to analyze the relationship between the geometry of the survey on the surface and the resulting image of the target horizon in terms of the number of hit points, the direction of the maximum propagation of waves and the resolution. Then, considering the technical and financial constraints and the desired image quality, the optimal parameters can be chosen. In this thesis, by constructing synthetic models from a variety of complex geological models using the ray-tracing method as a method with high accuracy and acceptable efficiency for 3D seismic survey modeling, the initial design of parameters for Geometry of acquisition is discussed. Then, by analyzing data obtained from wave propagation modeling with the help of illumination maps and flower maps that are available in Norsar software and this software is used in this thesis, the key parameters of geometry were collected Optimized. As a result, relatively full-coverage images are obtained in terms of the wave hitting the target laxyer.
Keywords:
#Keywords: Three-dimensional seismic planning #ray tracing #Seismic wave propagation modeling #illumination maps #Flower plots #velocity models Keeping place: Central Library of Shahrood University
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