This paper presents case histories and field data that details the application of well test data to "calibrate" fracture models, understand fracture performance, and optimize treatment designs. The paper includes field results from gas reservoirs in the Rocky Mountains, West Texas and East Texas. In addition, the case histories illustrate the application of postfracture pressure buildup data to identify reasons for fracture treatment problems and confirm treatment success. The paper also includes a novel data set that illustrates fracture performance from a liquid CO_2 stimulation (no sand, no water) in West Texas. The case histories illustrate the improtance of integrating well test data with fracture treatment optimization, showing how this process can improve our ability to reliably make multi-million dollar decisions concerning proppant selection and fracture treatment size.
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