Q. An exploratory well encountered three reservoir formations S1 (perfectly cemented), S2 (poorly cemented) and S3 (fractured). The Formation Factor (F) is governed by the equation 𝐹 = 𝑎𝜙−𝑚, where ‘𝜙’ is the porosity and ‘m’ is the cementation factor. The constant ‘a’, linked to tortuosity is assumed to be 1 for all the formations. The log-log plot between Formation Factor (F) and porosity (𝜙) is shown.
Which one of the following represents the correct match of the formations with their respective plots?
| (A) S1-P, S2-Q, S3-R | (B) S1-R, S2-P, S3-Q |
| (C) S1-P, S2-R, S3-Q | (D) S1-R, S2-Q, S3-P |
Ans: S1-R, S2-Q, S3-P
