| Popis: |
With the introduction of a new LWD tool, it has now become possible to acquire formation pressure and mobility data during short breaks in the drilling process. Formation pore pressure and near wellbore mobility are key parameters for reservoir description. Traditionally, these data have been acquired with wireline formation testers, upon reaching section or well TD. In high angle wells, this is a time-consuming operation, as the tools have to be conveyed by drill-pipe. Providing this type of formation evaluation data with an LWD tool allows for a continuous approach to data evaluation and decision making and represents a significant opportunity for safe and cost-efficient wellbore construction. The paper will briefly review the design and operation of a new formation pressure while drilling tool which is capable of performing optimized repeat pressure tests in less than one minute. The paper will use case histories from different operating areas to demonstrate the applicability of this formation tester to conventional applications, such as the determination of formation pressure, fluid contacts, reservoir connectivity, and near-wellbore mobility; and novel real-time applications, such as mud weight management, safe selection of casing point, calibration of pore pressure predictions, selection of wireline sampling points, reservoir monitoring, geo-steering, and obtaining data in high risk wells. |
