Abstract: The present invention is an improved apparatus and method for measuring downhole flowing and shut-in pressures to determine the condition of the reservoir and the potential of the well as a stimulation candidate. The tool string of the present invention is a novel combination of existing equipment that allows an electronic pressure gauge and shut-in tool to be run into the hole with coiled tubing. The present invention, in most cases, solves the potential problem of having to shut in or kill a flowing well prior to and after performing pressure testing, preventing lost production or potential well damage due to the killing operation. In addition, the present invention provides accuracy over current coiled tubing systems by reducing the effects of wellbore storage on pressure build-up testing.

Abstract: This invention provides a method for diagnosing formation damage mechanisms through the use of radially oriented core samples cut from the wellbore wall. Core samples are taken from the wellbore and analyzed under a number of different analytical methods. From the analysis of the cores the operator should be able to determine the type, extent, and severity of the formation damage, as well as the distance that damage extends out into the formation.