Modular dynamic test

Formation pressure data were obtained from repeat formation tester (RFT) or modular dynamic tester (MDT) measurements of numerous deep wells in the Central North Sea. These data were used as the primary pressure dataset as they are the most accurate pressure measurements possible down-hole. The MDT/RFT wireline tool takes a pressure reading within a permeable formation, by setting a seal at a precise depth determined by using an accompanying gamma ray tool for depth correlation. Drill stem test (DST), mudweight data and kick (influxes of pore fluids into the wellbore) information was also used where RFT or MDT data were not available or of very poor quality. A summary of the various approaches used to derive formation pressures is provided by Holm (1998). 

There were three successful Modular Formation Dynamics Tester (MDT) tests that provided two important pieces of information (1) evidence of hydrates through the reservoir response to pressure simulation and (2) geomechanical/geothermal measurements at pressure production interval. 

VI-12] SUZUTA, T., et al.. Steam-water natural circulation tests for integrated modular water reactor (IMR), Japan-US Seminar on Two-Phase Flow Dynamics (Paper presented at Int. Seminar, Nagahama, Japan, 2004). 

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