Waterflood Performance Predictive Calculations | Web Application
VenTex Software Corporation has developed an industry accepted,web based waterflood application
program dealing with the immiscible displacement of oil by water resulting in the prediction of oil recovery.
Waterflood prediction methods cover a wide and diverse range of techniques and as a consequence lead to
simple or comprehensive results and detail. The choice of methodology many times depends upon the degree
of detail required and is typically based upon the following five factors as a minimum consideration:
- The time available for the evaluation
- Volume and quality of data in hand
- Required minimum amount of detail necesarry to make a decision, i.e., at the start
of a flood or possible expansion of an existing flood
- Experience level of the evaluation member(s)
This application is not intended as a substitute of state of the art simulation
methods but rather as a quick way for the practicing engineer, geologist, operator
or other qualified user to predict the performance of oil recovery due to the injectivity
of water and to determine project viability. In other words, most of us involved
in day to day operations do not have the time and in many instances, the inclination
to become specialists in simulation techniques and processes when projects arise
a few times each year.
The calculations are based on the waterflood predictive methods recommended by various
researchers (Craig et al, Caudle & Witte and Welge) that consider the water displacement
mechanism including the existence of a saturation gradient behind the water bank ( movable oil ).
Layer analysis is initiated with data input consisting of rock and fluid properties usually
found and available in most production operation office environments. Relative permeability
data obtained from laboratory measurements from cores can be manually input or can be
empirically generated if saturation end points and rock wettability can be estimated.
Multiple layers with different rock and fluid properties can be analyzed independently or
as a summary analysis. Single multilayer five spot pattern or multiple pattern analyses
can be performed if so desired. The resulting layer calculations provide for injection
and oil production rates, cumulative oil recovery, injectivity and water production, WOR,
injectivity as a function of pore volume, all versus time. Results of all analyses and
graphs can be printed for permanent record documentation.