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PETROMAKS2-Stort program petroleum

Energy Efficiency of Field Development: IOR, System Analysis and Risk Evaluation

Awarded: NOK 2.2 mill.

Project Number:

208526

Project Period:

2011 - 2013

Partner countries:

In this project we will develop system analysis methods, optimisation routines and algorithms to be implemented in computer programs for evaluation of oil and gas recovery methods, assessment of process efficiency, energy consumption, environmental impact and application risk associated with Improved Oil Recovery (IOR) methods. These system analysis methods use multi-objective optimisation WELMM (Water, Energy, Land, Materials, Manpower) approach to evaluate energy and primary resource consumption, to ass ess environmental impact of oil and gas field development scenarios. Multi criterion analysis and compromise programming methods take into account utilisation of primary resources, account for their availability and environmental constraints. Gas and Wate r-Alternating-Gas (WAG) injection is an efficient way to utilise produced associated gas and increase oil recovery in the same time. WAG is widely applied when required infrastructure for gas export is not in place or economically unfeasible due to small gas volumes. Decisions on gas injection implementation have to be taken at early phase of field development, when reservoir and fluid information is quite limited and uncertain. To date no analytical solutions exist to quickly estimate WAG injection poten tial. Multi-objective optimisation algorithms will allow finding more energy efficient reservoir exploitation strategies with higher oil recovery and lower water production for oil and gas fields consisting of several isolated formations or layers. A ris k and economic evaluation program with NPV analysis will be developed for assessment of field development scenarios and IOR methods. The approach will use a Decision Tree Analysis (DTA) in order to determine the risk adjusted discount rates for sequential decision periods and different field production periods and account for managements ability to adapt to newly arriving information, managerial operative and strategic flexibility.

Funding scheme:

PETROMAKS2-Stort program petroleum