Page 62: of Offshore Engineer Magazine (Sep/Oct 2013)

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diffcult to determine, with One hundred percent

QuickCore wireline system accuracy, if those spaces of gas and liquids are cap- were flled with hydrocar- tured in storage cylinders by bons or water. Operators proprietary valves and are

Drilling then use the MDT test, but stacked above the core bar- there’s no true way to cor- rel. The core is only allowed relate how much reservoir to depressurize to a certain volume that ssample came level during the trip out. The from, because it was drawn confning pressure is pre- out of the reservoir near determined with the client the wellbore wall. From and that decision is based that, operators are forced to on a compromise between estimate how much came rig safety and core integrity out of that known volume preservation. Although the of core. They know that core is allowedto depressur- the liquids and the gases ize to some degree, all of the are from their sample, then subsequent liquids and gases they do backwards math in are retained and temperatures an attempt to understand and pressures are monitored

Fluids are captured in cylinders and stacked above the core barrel.

how much gas and liquid for the entire trip out of the came out. hole.

The QuickCapture coring platform Currently, clients are trying to mini- allows operators to better understand mize the damage due to the decom-

New technology

Operators often defne their coring exactly what they have in their deep- pression of the core by extending trip program not by what they want, but water reservoirs before making critical, time to as much as 48 hours from the rather by what they can afford. They fact-based, completion and production bottom of the well bore to surface. are constantly seeking to secure more decisions, because it refects the exact While this does not solve the problem core samples at a lower cost, allowing amount of hydrocarbons that came out of lost hydrocarbons, it is believed that them a better reservoir assessment. of an exact amount of core volume. it reduces the mini-frac effect. This a constant ? ow of solutions

CONNECT UNDER PRESSURE SERIESCONNECT UNDER PRESSURE SERIES

VOF VEP-HD VOF MULTI GRMULTI GR stucchi.it

ADV_Generica-Offshore Eng.indd 1 27/02/13 15:37 062_OE0913_D&C Corpro.indd 64 8/20/13 12:14 PM