Deep reservoir engineering insight

With 25+ years of Reservoir Engineering experience, REpublic provides hands-on consulting in:
• Reservoir simulation (Petrel RE / Eclipse / tNavigator / Flow-ResInsight / Rubis / MoReS)
• Field development planning (FDP)
• Well and reservoir management (WRFM)
• Operational petroleum engineering
• Mature field re-development
• Gas, condensate and oil reservoirs
• Carbonates, chalk, sandstone, fractured reservoirs
• Miscible gas / CO2 / WAG flooding
• Technical screening of acquisition and divestment opportunities

Consultancy services

REpublic reservoir engineering was founded by Lex Rijkels in 2017. Lex provides advice and hands-on consulting himself, based on 12 years with Shell, 11 years with Maersk Oil and a variety of consulting projects. REpublic also has access to a network of world class reservoir engineers with 25+ years experience with major operators.

About us

CV Lex Rijkels

Head of reservoir engineering (2013-2017):
• Technical authority for Maersk’s Danish Business Unit, responsible for quality assurance of all reservoir engineering deliverables.
• Petrel RE focal point; workflows to deal with tilting fluid contacts, PVT gradients and hydraulic fractures. Implemented and supported experimental design in a number of studies.
• Subsurface lead for DBU’s master development plan. Developed maturation strategy for full portfolio until end of license with links to technology plan.

Project manager for Tyra SE development (2010-2013):
• Initiated and matured through FID a USD 800 mln CAPEX project to develop 50 MMboe from a new 4-legged wellhead platform and 12 horizontal infill wells in Tyra SE’s Chalk reservoir.
• The project was completed on time, on budget, without incidents in Q1 2017, realizing P50 base production and the identified upside in the Chalk.

Team leader Tyra and satellites (2006-2012):
• Leading an integrated team of 12 subsurface staff, combined operations and studies. Structured well and reservoir management into a process delivering campaigns of coil tubing PLTs, restimulations, clean-outs and surveillance. Delivered multiple integrated FDPs.

Principal reservoir engineer for Shell in Damascus, Syria (2001-2006):
• Team leader of two field teams responsible for managing production from 850 mln bbl STOIIP through 76 wells; reservoir engineer in four study teams.
• Matured and delivered infill field development of 28 wells in faulted, fluvial reservoir under waterflood, using geostatistics and > 5,000 stochastic simulation runs to design the well pattern and injection strategy.
• Analysis of first 4D onshore seismic survey in Shell
• Identified the first field evidence of sweet water IOR in one field flooded with river water

Shell’s technology centers in the Netherlands (1994-2001):
• Reservoir engineer in asset studies of multi-billion bbl fractured carbonate oil fields
• Reservoir engineering focal point for carbonate flow units (matrix) research projects
• Technology development programmes for fractured reservoir simulation


Technology Development

The capabilities of open source subsurface software continue to improve. With ResInsight’s Python API it is now possible to create geological models for simulation in Eclipse or OPM-Flow. Here is an example of the workflow. We have also developed a completely parametrised simulation template for green field evaluation. This allows uncertainty modelling of a field …