| CPC E21B 49/081 (2013.01) [E21B 47/06 (2013.01); E21B 49/088 (2013.01); E21B 49/0875 (2020.05)] | 9 Claims |
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1. A method for evaluating a subterranean formation comprising:
receiving fluid that flows from a reservoir in the formation and into a wellbore intersecting the formation, and to define received fluid;
collecting the received fluid in a sample tank that is coupled with a tubular string in the wellbore, and to define collected fluid;
deploying into the wellbore an end of a string of coiled tubing having a coupling;
lowering static head in the coiled tubing to create an underbalanced environment in the coiled tubing;
providing communication between the coiled tubing and the collected fluid inside the sample tank by engaging the coupling with a fitting coupled with the sample tank;
transporting an amount of the collected fluid to outside of the wellbore through the coiled tubing;
estimating a potential recovery of hydrocarbons from the formation by identifying a constituent of the collected fluid and a flowrate of the received fluid;
determining if a drill stem test is to be conducted based on estimating the potential recovery of hydrocarbons from the formation; and if it is determined to conduct the drill stem test, then performing a drill stem test in the wellbore that comprises,
placing within the wellbore a drill stem test string having a test sub with inlets that are in communication with the reservoir,
drawing fluid flowing from formation through the inlets and into the test sub,
directing the fluid from within the test sub to surface, and
analyzing the fluid on surface.
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