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Application Of Seismic Inversion Technology In Boxing-Chunhua Area

Posted on:2010-08-20Degree:MasterType:Thesis
Country:ChinaCandidate:Q LinFull Text:PDF
GTID:2120360272487993Subject:Earth Exploration and Information Technology
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Logging constrained inversion is used to describe the hidden reservoir lithology effective geophysical technology, its applications have become more and more mature. Through extensive literature research, the paper did in-depth analysis of the basic principles of the technology, methods classification and operational processes. For the western Boxing region of Dongying depression - purification of Sha4 Member reservoir lithology related geological features, and combined with information on the situation, bound to carry out the study area reflect the logging, and application of the technology analysis. Paper to set out the key issues, including two aspects: First, logging constrained inversion of the relevant theories and methods; Second, the technology development in the reservoir area lithology examples of inversion analysis.First of all, carried out the technology of seismic inversion and a great deal of literature research, summarized the relevant progress in the field and then briefly introduced several major inversion methods that been used widely at present. Constrained inversion for logging, discussed the key techniques of the method in detail form the pre-processing of logging data, geological interpretation of seismic data, wavelet extraction, synthetic seismogram, David Wells calibration, the initial model of acoustic impedance inversion, and optimization parameters.Boxing - Purification is located in the western region of Dongying Depression, Lithologic reservoirs is the most important reservoir type of the area. The purpose layer of inversion is Sha4 Chu under, this layer has the extensive development of sandbody Beach dam, and it is compatible with the lack of seismic inversion technology. Through the results of previous studies related to seismic inversion study of the regional profile, making full use of regional geological studies, seismic, drilling, logging, oil and various test data, and associated pre-processing. On this basis, to carry out Boxing-Chunhua of Sha4 chun Si Member in the under logging constrained inversion.Logging data analysis and processing results showed that acoustic velocity and other types of commonly used logging data correspond with the actual lithology is not satisfactory in the area of Boxing - Purification, it can not distinguish reservoir well. Logging constrained inversion carried forward the essence of the traditional wave impedance inversion technique. Add the other logging data in the sound waves curve., which can reflect the lithology ,such as GR, use the reconstructed sound wave curve to do the inversion, it improved the ability to portray in the seismic inversion of Boxing - Purification of Sha4 Chun Member sand beach under dam reservoir sand body significantly.The paper integrated presentation of methods of logging constrained inversion theory and key technology, on this basis, put in into use in the Boxing - Purification of Sha4 Chun Member sand beach under dam and reservoir sandstone layer achieved significant results.
Keywords/Search Tags:Logging constrained inversion, Boxing-Chunhua Area, Wave impedance, Curve Reconstruction, Inversion effect
PDF Full Text Request
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