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- Title
Prediction of brittle mineral index by using P-wave and S-wave velocity method.
- Authors
Bao Xiang-sheng; Tan Ying; Wu Xiao-qi; Zheng Hong-jun
- Abstract
Brittleness index is an important parameter to select shale gas sweet spot.In view of the poor adaptability of Rickman method,which is widely used to predict brittle mineral index based on elastic parameters,a P-wave and S-wave velocity method for prediction is proposed.The brittle mineral index prediction method is derived based on the Wyllie equation,in which some elastic parameters,such as clay minerals and brittle minerals,are needed to be considered.This method only needs to consider the parameters of P-wave and S-wave in predicting brittle mineral index,which is simple and has a clear physical basis and clear geological meaning.The application in Well S in a certain area of Sichuan Basin shows that this method has higher prediction accuracy than the Rickman method.Therefore,the P-wave and S-wave velocity method can effectively guide the prediction of the brittle mineral index in the study area.
- Subjects
MINERALS; ELASTICITY; SHALE gas; PREDICTION models; P-waves (Seismology); THEORY of wave motion
- Publication
Natural Gas Geoscience, 2018, Vol 29, Issue 2, p9
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2017.12.003