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Study on Processing Method of MREx Logging Data

Author: LiZhongXin
Tutor: SunJianMeng
School: China University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: MREx NMR logging Data processing Singular Value Decomposition Fluid properties analysis
CLC: P631.84
Type: Master's thesis
Year: 2011
Downloads: 104
Quote: 0
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Abstract


NMR logging technology is one of the last century, the world logging industry in the 1990s the major technological advances, and provides a new solution for the complex reservoir exploration and development. MREx NMR logging of the introduction of advanced NMR logging tools. Launch faster because of the instrument, the hardware and software are not perfect, and geological conditions are applicable to the processing and interpretation software with larger differences in our actual reasons some of the problems encountered in the data processing and interpretation. If these problems are not resolved, it will greatly affect the application of the technology in China. Nuclear magnetic logging data and application examples research at home and abroad on the basis of in-depth study of the basic theory of NMR logging, the entire process of MREx NMR Logging Data processing and one of the key technologies. Analyzed the data extraction and the original echo string generated, of MREx instrument detection characteristics, observation mode, data recording format, clear data acquisition and storage details, original records information extraction. NMR data echo of MREx generate a series of key technologies, including phase correction, echo superimposed, a combination of the standard group, time-depth conversion study and master the original signal from the time domain to the depth domain echo train signal processing technology . Echo train inversion of NMR logging echo string of T 2 spectral inversion of the mathematical model and the singular value decomposition method. An improved method using singular value decomposition inversion T 2 spectrum, to meet the needs of the on-site data processing. Reservoir parameters calculated using NMR data processing calculated porosity, permeability, and other basic reservoir parameters and variable T 2 cutoff value and DMR, SMR technology to improve the parameters strike accuracy. Fluid qualitative analysis and quantitative calculated combining the characteristics of a typical oil and gas water layer, shift spectrum, the difference spectrum of the principle of law and the applicable conditions. Quantitative calculation 2 spectral information from the the echo string of information processing and T handle two fronts. Quantitative calculation based on the echo string processing to take advantage of the dual-TW logging data the echo string of poor, based on the T 2 spectral information processing the double TE information diffusion analysis, including the use of multi-G · TE information diffusion analysis and the multi G · TE T 2 spectrum joint inversion of the three methods. Which will be fast simulated annealing algorithm for echo string of poor two-phase search, and get better results. Verified on the basis of the above research work, through the processing and analysis of methods for instance well.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Underground geophysical > Collation , interpretation of measurement results
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