In the field of Petrophysics and Well Logging Applications. Literature research based on primary sources1. You could, for example, choose to focus on a specific petrophysical tool and its application(s). Alternatively, you could focus on a relevant scientific/technical problem in subsurface geology and how well log petrophysics can be used to solve/investigate that problem.
Primary sources are reports of original studies. This definition clearly excludes review papers, and these should not be the primary
source of literature/data for your paper. However, review papers can certainly be discussed and cited (for example, in the Introduction to cover previous work or in the Discussion to bring up points of comparison).
Abstract, Introduction, Body of the paper including Discussion and/or Conclusions, References
