Changes

Much of the design phase of an EOR project is spent in the search for the combination of processes and injection schemes that will maximize oil recovery relative to the cost of implementing the particular process. Specifically, the phases in designing an EOR project include the following:

Much of the design phase of an EOR project is spent in the search for the combination of processes and injection schemes that will maximize oil recovery relative to the cost of implementing the particular process. Specifically, the phases in designing an EOR project include the following:

* Basic screening criteria<list list-type="bullet"><list-item>Oil viscosity</list-item><list-item>Remaining oil in place</list-item><list-item>Geology</list-item><list-item>Formation water salinity</list-item><list-item>Formation depth and temperature</list-item><list-item>Estimate of potential benefit</list-item><list-item>Cost</list-item>

# Basic screening criteria

* Lab tests<list list-type="bullet"><list-item>Fluid properties</list-item><list-item>Rock properties</list-item><list-item>Core floods</list-item><list-item>Chemistry of injection material</list-item>

#* Oil viscosity

* Volumetric calculations to determine cost benefit ratio

#* Remaining oil in place

* Detailed technical studies<list list-type="bullet"><list-item>Geological</list-item><list-item>Reservoir simulation</list-item><list-item>Economic projections</list-item>

#* Geology

* Field trials

#* Formation water salinity

#* Formation depth and temperature

#* Estimate of potential benefit

#* Cost

# Lab tests

#* Fluid properties

#* Rock properties

#* Core floods

#* Chemistry of injection material

# Volumetric calculations to determine cost benefit ratio

# Detailed technical studies

#* Geological

#* Reservoir simulation

#* Economic projections

# Field trials

It is possible to skip many of these steps by using reservoir engineering analogy when neighboring reservoirs that have undergone EOR have properties similar to the reservoir in question. In addition, field trials are often not attempted due to the length of time they require and the difficulty in selecting a portion of a reservoir to study that is representative of the reservoir as a whole.

It is possible to skip many of these steps by using reservoir engineering analogy when neighboring reservoirs that have undergone EOR have properties similar to the reservoir in question. In addition, field trials are often not attempted due to the length of time they require and the difficulty in selecting a portion of a reservoir to study that is representative of the reservoir as a whole.