A Review of Static Formation Temperature Test Evaluation Methods

Abstract

Five methods for estimating static formation temperatures are tested using eight different data sets. Each method differs by using linear, cylindrical or rectangular source solutions to the thermal diffusion equation. Analysis carried out using both linear and non-linear least-squares regression to correlate temperature build up and time. The calculated formation temperatures are compared with reported values of true formation temperatures and methods are evaluated. The comparison shows that the Brennand method is the lead choice of the five methods tested. This is in agreement with recommendations by Sarmiento (2011) and Horne (2016). This method is easy to implement and requires less shut-in time.