Warta Geologi, Vol. 45, No. 1, March 2019, pp. 1–5

Application of sand percentage to evaluate fault seal
risk

Robert Shoup^1,*, John Jong², Franz L
Kessler³

¹ Subsurface Consultants & Associates, USA

² JX Nippon Oil and Gas Exploration (Malaysia)
Ltd, Malaysia

3 Goldbach Geoconsultants O&G and Lithium Exploration,
Germany

*Corresponding author email address: rcs@clasticman.com

Abstract:
In hydrocarbon exploration, establishing Allan Sections, calculating Shale
Smear Factor and Shale Gouge Ratios are the few commonly applied methods for
assessing fault seal risk. In this paper, an alternative approach is introduced
to evaluate seal risk at the prospect scale by overlaying a sand percent map
over the prospect structure map to help quantify seal risk along the fault
trace. This approach effectively integrates all G&G data readily accessible
to an interpreter during a prospect maturation process to narrow the seal risk
uncertainty.

Keywords:
Allan Sections, fault seal, sand percent, Shale Smear Factor, Shale Gouge
Ratios

ISSN
0126–5539; e-ISSN 2682-7549

DOI :
https://doi.org/10.7186/wg451201901