PACKER - A FORTRAN-77 CODE FOR COLLECTION, ANALYSIS, AND DISPLAY OF INTERVAL PRESSURE INJECTION TEST DATA

A FORTRAN 77 code is presented which gives the user a systematic appro ach to the collection, storage, and graphical display of results from pressure injection testing of wells and boreholes. Transmissivities ar e computed using three different formulations: a simple, standard meth od; one which accounts for unsaturated conditions and the use of one o r two packers; and a method which assumes that the majority of the tra nsmissivity is the result of a single, horizontal fracture. Results ma y be displayed graphically with depth along with the matrix values to detect significant secondary porosity. A methodology is presented for calibrating for head loss in the piping system to maximize the accurac y of computed results. The code takes flow-head loss data either inter actively, or from a database holding previous calibration data. The da ta then are fit with a best-fit polynomial, the order of which is sele cted by the user. The best fit of the head loss data may be viewed gra phically.A set of field collected pressure injection data is presented and analyzed using the code. The results demonstrate the influence th at both the computational formulation and the head loss calibration ma y have on computed results.