Its simple user interface and workflow allows for fast training and self-learning for occasional users. Saphir NL is the industry standard PTA software, used by nearly all major IOC’s, NOC’s, Independents and Service Companies. The development of deconvolution in Saphir NL allows us to combine several of these shut-ins in time to provide information much deeper into the reservoir than would normally be feasible by a shut-in alone. Specific operations require specific processing, such as multirate gas tests, interference tests, multilayer tests, etc. The diagnostic plot of choice is the loglog plot where the pressure and the Bourdet derivative allow the identification of reservoir geometry and properties, these are then matched with models. The pressure response from these shut-ins can be used to provide information about the reservoir within the radius of investigation for radial flow or the area of investigation for more complex geometries. The data are captured during dedicated well test operations such as DSTs or production tests or during routine operational shut-ins by Permanent Downhole Gauges (PDG). Pressure Transient Analysis, or PTA, is, in most cases, about analyzing high frequency, high resolution shut-in data.
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