Sensitivity of Hydrocarbon Recovery by CO2 Injection to Production Constraints and Fluid Behavior

Autor: N. Kubus, Claire Barroux, D. Domitrović, Nicolas Maurand
Rok vydání: 2012
Předmět:
Zdroj: Energy Procedia. 23:408-425
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2012.06.075
Popis: The present renewed interest on CO2 EOR/EGR is led by an environmental concern. The consequence is that, today, we are urgently asked for considering the new CO2 EOR projects in association with CO2 storage. This implies an appropriate production well management allowing for delaying the CO2 breakthrough, while one has to keep a great concern on the safety issues related to the social acceptance, and to ensure a full economical viability of the CO2 injection projects. The picture becomes even more complex when it is planned to link various CO2 emission sites to various remote CO2 injection sites (typically already produced hydrocarbon reservoirs) through a large CO2 transportation infrastructure. In such a situation, it will be needed to harmonize in real time the rate fluctuations of the CO2 sources and the evolution of the CO2 sink injectivities (closely related to the reservoir pressure), while avoiding to meet the surface/transportation equipment limitations. The optimization of such a large system being not solvable rigorously, there is a particular interest towards methodologies allowing for a simplified reservoir modeling of the CO2 sinks (hydrocarbon field or aquifer). This point has been addressed in the work presented hereafter, which has been completed within the frame of the European ECCO project, aiming at providing a techno-economical tool for the CO2 value chain analysis. After a review of possible methods of reservoir conceptual modeling, the paper is presenting the approach followed for modeling reservoir CO2 EOR/EGR candidates in Central Europe. What is emphasized is the quantification of the impact of production constraints on hydrocarbon recovery and CO2 storage, in particular by means of an experimental design based tool. In addition, it is shown how some uncertainty on fluid miscible behavior can influence the hydrocarbon production.
Databáze: OpenAIRE