In shale reservoirs, anisotropy cannot be ignored. However, in conventional well logging measurements, shale anisotropic parameters cannot be measured directly. We build a deep neural network to estimate the nonlinear relationship between the well log curves and the anisotropic parameters. In the composition of the training set, we use the results calculated from the anisotropic self-consistent approximation + differential effective medium model (SCA + DEM) model based on equivalent medium theory and Chapman model based on wave-induced exchange of fluids between pores and cracks. We hope to get a neural network that describe both the complex composition of shale and the fluid effects. Finally, the trained neural network is applied to a field data example. The results show that the anisotropic parameters estimated by the neural network agree well with the real values.


Article metrics loading...

Loading full text...

Full text loading...


  1. YouN, LiY E, ChengA.
    [2019] Shale anisotropy model building based on deep neural networks [M]. SEG Technical Program Expanded Abstracts. Society of Exploration Geophysicists, 2019: 2663–2667.
    [Google Scholar]
  2. HornbyB E, SchwartzL M, HudsonJ A
    . [1994] Anisotropic effective-medium modeling of the elastic properties of shales[J]. Geophysics, 59(10): 1570–1583.
    [Google Scholar]
  3. BrownR J, KorringaJ.
    [1975] On the dependence of elastic properties of a porous rock on the compressibility of the pore fluid. Geophysics, 40(4): 608–616.
    [Google Scholar]
  4. ChapmanM.
    [2003] Frequency-dependent anisotropy due to meso-scale fractures in the presence of equant porosity. Geophysical Prospecting, 51(5), 369–379.
    [Google Scholar]
  5. ThomsenL.
    [1986] Weak elastic anisotropy. Geophysics, 51(10): 1954–1966.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error