Developing an oil reservoir: identify the critical data, realize quickly a first evaluation of the production profiles and of the reserves, estimate the impact of the remaining uncertainties

Synthesis

Develop an oil reservoir: identify and validate the essential data, realize quickly a first evaluation of the production profiles and of the reserves, estimate the impact of the uncertainties._________________________________________________ _____________________________ I. Introduction, the role and the responsibilities of the Reservoir engineer
II. Reminder of the physical and chemical laws used in the evaluation of the development of an oil reservoir.
– The laws governing flow of the fluids in a porous environment and in pipes (well and surface network).
– The reservoir fluids thermodynamic according to the pressure and to the temperature.
III. Critical analysis of the available data
– Static Model, Geology and Geophysics
– Petrophysical data
– Thermodynamic data
– Pressure data
– Well test
– Operational constraints
IV. Sensibility of the forecasts in the choices of the various parameters of calculation – Pressure of abandonment(relinquishment) of the reservoir
– Aquifer activity
– Production rate
– Surface Process
– Errors calculations and results sensitivity
– Economics and financial consequences of errors
V. Choice of the methods and of the tools
– The analytical methods and the determination of the relative importance of the diverse parameters of calculation
– When to use the digital models by knowing their limits
VI. Conclusions and recommendations

Language

Audience type

Planned duration

1 to 1.5 day depending on public and on the number of practical exercises

Support material

PowerPoint or PDF file, printedlecture note

Prerequisite

Knowledge in fluid mechanics, petroleum fluids thermodynamic and associated physic and mathematics corresponding to graduate students in Petroleum engineering.

Objectives

Give to the Reservoir engineers in the beginning of their career a critical approach on the available data without limiting themselves in their own technical domain, making them aware of the residual uncertainties and the way of integrating them into their evaluations, including for the economic aspect. Convince them to use the calculation methods adapted to the available information. The purpose is to improve the quality and the relevance of their forecasts as soon as possible in the studies of oil reservoirs development.

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