Changes

==Planning==

==Planning==

[[file:drill-stem-testing_fig1.png|300px|thumb|{{figure number|1}}Drill stem test tool string.]]

[[file:drill-stem-testing_fig1.png|200px|thumb|{{figure number|1}}Drill stem test tool string.]]

The key to successful testing depends upon planning and teamwork between the geoscientist and the engineer. Potential pay zones should be identified before drilling commences so that the drilling program can be designed to accommodate the test. If offset data are available, the magnitude of [[porosity]], permeability, and reservoir pressure should be identified. Knowledge of zonal mineralogy may prevent excessive damage by [[drilling fluid]]s and should be used in designing the mud program. The anticipated reservoir properties are used to design the test string and test times so that the best, most useable data can be obtained.

The key to successful testing depends upon planning and teamwork between the geoscientist and the engineer. Potential pay zones should be identified before drilling commences so that the drilling program can be designed to accommodate the test. If offset data are available, the magnitude of [[porosity]], permeability, and reservoir pressure should be identified. Knowledge of zonal mineralogy may prevent excessive damage by [[drilling fluid]]s and should be used in designing the mud program. The anticipated reservoir properties are used to design the test string and test times so that the best, most useable data can be obtained.