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Earthquake Constrained Impedance Inversion And Applied Research

Posted on:2007-11-21Degree:MasterType:Thesis
Country:ChinaCandidate:D Y WangFull Text:PDF
GTID:2190360185481737Subject:Earth Exploration and Information Technology
Abstract/Summary:PDF Full Text Request
Regarding the oil field exploration, the results of seismic inversion play a more and more important role in the fine oil pool description and lateral in reservoir prediction. The technology can actually reflect underground rock layer lothological transitivity mop characteristic and respond indirectly the reservoir containing the fluid nature change characteristic, taking advantage of this can greatly raise the percentage of drilling hits. This article after elaborating several kinds of seismic restrain inversion method (ISIS simulation annealing inversion, constrained sparse spike inversion, multi parameter lothological seismic inversion) principle, key technologies, suitable condition and good and bad points, unifying the actual 3D seismic material of chongxi zone xiangxi group, has carried on the inversion method application, and has carried on the analysis contrast to each kind of inversion method practical application effect, finally has carried on the mop prediction in the impedance inversion foundation to the effective reservoir, get some production and cognition:The method of ISIS simulation annealing inversion is a seismic multi-trace inversion which bases on the fast simulate anneals method. In the progress of impedance inversion, by the seismic material primarily, carries on the inversion by the log information as the constraint condition, because uses the simulation annealing algorithm to seek the overall situation optimal solution, requests lowly to the initial model, suits the exploration degree low area. On the other hand, because this method resolution mainly relies on seismic material itself, Thus in oil-field development stage, if the seismic material itself resolution is not high, and then the inversion result is difficult to satisfy the reservoir fine description.The method of constrained sparse spike inversion supposes that the reflections coefficients of strata are sparse. A rapid trend-constrained pulse inversion calculation is adopted, using the seismic interpretation horizon and logging-constraint to control the trend and scope of wave impedance. The pulse calculation can obtain the wide-band result. The inversion result is faithful to seismic data, simultaneously; the constraint of logging and geology can replenish the component of low and high...
Keywords/Search Tags:impedance, reservoir, parameter, wavelet, initial model, inversion, porosity, effective thickness
PDF Full Text Request
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