The ratio of number of production to injection wells for a regular Seven-Spot pattern is .............. (rounded off to one decimal place).
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Solution and Explanation
In a regular Seven-Spot pattern used in waterflooding/EOR, there are 6 injection wells surrounding 1 central producer. Alternatively, it may be inverted (6 producers around 1 injector). Step 2: Effective ratio.
Regardless of the arrangement, the pattern always represents 1 well of one type surrounded by 6 wells of the other type. The pattern is repeated such that the areal coverage yields a ratio of: \[ \frac{\text{Number of producers}}{\text{Number of injectors}} = 1. \] Step 3: Rounded value.
Hence, the ratio is exactly \(1.0\). Final Answer: \[ \boxed{1.0} \]
Top Questions on Reservoir and channel routing
For a hydrocarbon reservoir, the following parameters are used in the general material balance equation (MBE):
\[ \begin{aligned} N & = \text{Initial (original) oil in place, stb} \\ G & = \text{Initial volume of gas cap, scf} \\ m & = \text{Ratio of initial volume of gas cap to volume of oil initial in place, rb/rb} \\ S_{wi} & = \text{Initial water saturation} \\ S_{oi} & = \text{Initial oil saturation} \\ B_{oi} & = \text{Initial oil formation volume factor, rb/stb} \\ B_{gi} & = \text{Initial gas formation volume factor, rb/scf} \end{aligned} \]
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