Análise de métodos para interpretação de testes de mini-falloff (MFO)

Abstract

MFO tests consist of techniques in which a small volume of fluid is injected to create a small fracture in a short period of time, making it possible to record a pressure drop. An MFO test is capable of providing better results than an isolated test in a formation in which the fluid flow from the reservoir to the well is severely restricted by formation damage or very low permeability. The methodology used to compare the results of the interpretation of mini-falloff tests was made from the equations based on filtration model and flow porous media. The data analysis of the MFO test is performed in two parts. The analysis before fracture closure and after fracture closure. From these analyzes, it is possible to obtain reasonable estimates of the closure tension and the permeability of the formation when the pressure drop is recorded for long enough to reach the pseudo-radial flow.