Patent ID: 7519481
Filing Date: 2009-04-14
Classification: E21B

Abstract:
1. An accelerated method for selecting one or more compatible fluids for one or more metals exposed to the corrosive conditions present in an oil field environment, the method comprising: contacting one or more metal specimens comprising the one or more metals with one or more test fluids under stress testing conditions simulating downhole conditions and conducted over an accelerated period of time compared to NACE standard test guidelines, the stress testing conditions comprising a stress level effective to produce both elastic and plastic deformation of the one or more metal specimens, the one or more test fluids being representative of packer fluids or completion fluids commercially used under the corrosive conditions in the oil field environment; monitoring in real time one or more corrosion tendencies of the one or more metal specimens and producing simulated stress test data comprising pre-cracking parameters and/or cracking parameters for the one or more metal specimens; and, selecting fluids by matching the simulated stress test data with actual field conditions under which a completion fluid or frac fluid is compatible with one or more metals in an oil field environment.