Study on selection and direct inversion method of brittleness index for shale reservoir

• Published in: Acta geophysica Vol. 71; no. 2; pp. 757 - 768
• Main Authors: Qin, Ziyu, Wen, Xiaotao, Pan, Shulin, Chen, Jing-yi, Gou, Qiyong
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.04.2023; Springer Nature B.V
• Subjects: Algorithms; Boreholes; Brittleness; Earth and Environmental Science; Earth Sciences; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Organic matter; Porosity; Research Article - Applied Geophysics; Structural Geology; Amplitude variation with offset (AVO) inversion; Exact Zoeppritz equation; Brittleness index; Rock physics model; Limited-memory Broyden−Fletcher−Goldfarb−Shanno (L-BFGS) method

The brittleness index can be indirectly converted by elastic parameters which are obtain by pre-stack amplitude variation with offset inversion and extended to the whole work area. However, indirect conversion will bring cumulative errors. In order to improve the accuracy of obtaining the brittlenes...