TITLE:
Simplifying the Integration of Petrophysics and Rock-Physics to Identify Hydrocarbon Bearing Rocks on Seismic
AUTHORS:
Arfan Ali, Erick Alvarez
KEYWORDS:
Petrophysics-Rock Physics Integration, Rock Physics Model, Quantitative Interpretation, Simplified Workflow, Seismic to Well Tie
JOURNAL NAME:
International Journal of Geosciences,
Vol.13 No.10,
October
31,
2022
ABSTRACT: A considerable effort has
been made in the literature for quality assurance (QA) and quality checking
(QC) of the petrophysical log data for computation of reservoir rock property
parameters. Well log data plays an integral role
in building a rock physics model for quantitative interpretation (QI) work.
A poor-quality rock physics model may lead to significant financial and HSSE
implications by drilling wells in undesired locations. Historically, a variety
of techniques have been used including histograms and cross plots for reviewing
the feasibility of petrophysical logs for QI work. However, no attempt has ever
been made to introduce a simplified workflow. This paper serves two-fold. It
provides a simplified step by step approach for building a petrophysics/rock
physics model. A case study has been presented to compare the synthetic
seismogram generated from the simplified workflow with the actual seismic trace
at well locations. Secondly, the paper shows how a few key cross plots and rock
property parameters provide adequate information to validate petrophysical
data, distinguish overburden and reservoir sections, and to help identify
fluids and saturation trends within the reservoir sands. In the mentioned case
study, the robustness of the simplified rock physics model has helped seismic
data to successfully distinguish hydrocarbon bearing reservoir sands from
non-reservoir shales.