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The biphasic media research based on the improved BISQ mechanism

Author: PengChuanZheng
Tutor: LiCaiMing
School: Chengdu University of Technology
Course: Solid Earth Physics
Keywords: Two-Phase Media Reformed BISQ Forward Reverse
CLC: P631.4
Type: Master's thesis
Year: 2007
Downloads: 201
Quote: 1
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Abstract


The double-phase medium theory considered fully the medium structure, the fluid and the gas special nature, the partial characteristic and the overall effect relations, can describe the actual stratal configuration and the stratum nature accurately. It can meet the actual needs of more and more complex oil gas preserve exploration naturally.The BISQ mechanism has considered in fully the most main two mobile forms of Biot flowing and spraying flowing in multi-hole medium. Simultaneously containing these two flow mechanics mechanism, the BISQ equation and improved BISQ are able real to reflect the seismic wave and the sound wave dissemination rule accurately. Although the BISQ model is finer than the double-phase medium description, the BISQ model formula is complex and not to be advantageous for the actual description because the equation contained the reaction jet length etc. The improved BISQ model is not only simple, but also convenient for computation while containing the reaction jet mechanism other then reaction jet length components and so on. Father more, the computed result also maintained with the BISQ model consistently.By using separately the three kinds of model of reformed BISQ model, the BISQ model and the Biot model carried on the wave field simulation and compared with the analogue result, the validity and the feasibility of the improved BISQ model is verified.Based on the non-saturated multi-hole BISQ model and the application of non-linearity simulation annealing algorithm carried on the inversion to the reservoir natural parameter, the inversion of porosity, the penetration coefficient and degree of saturation was carried out by using a group of stochastic noise theory bound wave to simulate actual observation data. The result indicated that the inversion precision of non-linear simulation annealing algorithm is high based on the non-saturated BISQ model and has the strong anti-chirp disturbance performance. It also proves the inversion method in the reservoir parameter forecast and the inversion to be valid. It will be apply to the oil gas reservoir static description, the dynamic monitor development, the seismic fundamental research and the practical application.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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