The Well / Aquifer Model (Initial Test Results)   -   19

6.0 ANALYSIS OF TEST RESULTS

6.1   Regression and Correlation Analysis

Considering the preceding theoretical discussion on well screen loss, the following fundamental parameters are significant:

(Q, Ap, V, E, H,, C)               (31)

where:

Q  = well discharge [L³/T]

Ap = percent of open area of screen [L^o]

V  = screen entrance velocity [L/T]

E  = well efficiency [L^o]

H = head loss across the screen [L]

= fraction of screen circumference open to flow [L^o]

C  = sand concentration of well discharge [L^o]

In the initial testing using the Santa Barbara and Silverado formations, sand concentrations measured in the well discharge was insignificant for all 25 tests. Because of this, the sand concentration parameter was eliminated from the regression and correlation analysis in this report. Also, the fraction of well screen open to flow () is considered as a separate data group and was not included in the subsequent analysis. Equation (31) now reduces to the fundamental parameters

f(Q, Ap, V, E, H)             (32)

From the variables in equation (32) it can be determined that a maximum combination of ten possible groupings will exist if the five basic variables are analyzed in groups of two:

where:

n = combination of variables (n = 5)

r = selection out of the n objects with no attention given to the order of arrangement (r = 2)

or

₅C₂ = 10

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