05-01b Reservoir geology and Log analysis

Objectives of reservoir geology

What does the Reservoir Geologist have to work with?

What is the Reservoir Geologist’s role?

From source to reservoir

Source rock types, maturation  and migration.

Main types of traps

Reservoir rocks

Depositional parameters controlling petrophysics

Reservoir properties: definition of the porosity,

porosity vs.  depth,

net-pay,

permeability,

capillary pressure,

water  saturation,

pore geometry.

Pressure vs. depth and overpressures.

Fracture porosity.

Water distribution.

Porosity vs. permeability relationships

Quiz

Fluid distribution

Wetting and non-wetting fluids

Capillary pressure, pressure vs. depth, fluid contacts

Reservoir geometry

Example from a deltaic environment

Sedimentology, impact on reservoir characteristics

Quiz

Oil and gas in place evaluation

Principles of mapping and contouring reservoir parameters  Hydrocarbons in place evaluation

Reserves concept

Quiz

Logging tools

SP,

gamma ray,

neutron porosity tool,

bulk density tool, sonic log and electrical resistivity tools

Examples (analysis to be carried out by the students)

Quiz

Log analysis theory and practice

Practical applications will allow the student to work with  the Rock model, lithology identification on porosity tools,  shaliness, effective porosity, Rw determination,  hydrocarbons effect and Sw computations, both non shaly  and shaly formations

Examples (analysis to be carried out by the students)

Quiz