Mi impresión es que se trata de un software de simulación empleado para análisis de prospecciones petrolíferas. En este contexto, dentro de la terminología petrolífera, el término “sandface” equivaldría a “subsurface” (subsuelo, donde está el fondo de la perforación).


http://www.oilandgasjobsearch.com/oil-and-gas-jobs/productio...

Generate integrated well models from subsurface (sandface) to surface including vertical, surface flow and treatment facilities.

http://www.dspace.uce.edu.ec/bitstream/25000/1126/1/T-UCE-00...
MODELADO INTEGRAL DE ANÁLISIS NODAL SUBSUELO – SUPERFICIE – ECONÓMICO DE LOS POZOS DE LA ESTACIÓN NORTE 2 DEL CAMPO SACHA
Objetivo general: Realizar un Modelado Integral de Análisis Nodal Subsuelo-Superficie de los pozos de la Estación de Flujo Sacha Norte 2 utilizando las aplicaciones WellFloTM y ReOTM.

http://www.spe.org/glossary/wiki/doku.php/terms:sandface
Sandface
the downhole completion interface

http://iom.invensys.com/EN/pdfLibrary/Datasheet_SimSci_PIPEP...
PIPEPHASE
PIPEPHASE® simulation software rigorously models steady-state multi-phase flow in oil and gas networks and pipeline systems with the power and flexibility to model applications ranging from the sensitivity analysis of key parameters in a single well, to multi-year facilities planning studies for an entire field. PIPEPHASE covers the complete range of fluids encountered in the petroleum industry, including single phase, black oil, and compositional mixtures. The program may also be applied to single-component stream or CO2 injection networks.
UPSTREAM OPTIMIZATION SUITE
Invensys’ Upstream Optimization Suite (UOS) is a set of integrated, decision-support tools designed to provide sandface-to-surface facility asset management. UOS unites the needs of the oil and gas production industry, current software standards, and SimSci-Esscor’s technical expertise to deliver best-in-class solutions to real world problems.