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- Title
基于可变临界孔隙度Nur 模型的页岩 气层横波速度预测.
- Authors
彭骁; 谭茂金; 王跃祥; 谢冰; 周肖
- Abstract
Accurate shear wave logging velocity is a necessary parameter for pre-stack seismic attribute analysis and pre-stack seismic inversion. In the absence of dipole shear wave logging,it is necessary to use Krief,pride and other mathematical models to predict shear waves. In recent years,critical porosity has been well applied in calculating elastic model quantities of skeleton. Based on the critical porosity model,genetic algorithm(GA)is investigated to achieve a variable critical porosity through the borehole. The shear wave velocity is finally estimated by using the critical porosity and the GA-derived parameters. A case study shows that genetic algorithm can calculate the continuous critical variable porosity,and the predicted shear wave slowness is well consistent with DSI log. This method can be applied to tight sandstone reservoir.
- Subjects
SHEAR waves; SURFACE waves (Seismic waves); FRICTION velocity; GENETIC algorithms; MATHEMATICAL models; POROSITY
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 12, p1815
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2018.11.001