| CPC E21B 49/087 (2013.01) [E21B 47/18 (2013.01)] | 17 Claims |
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1. A method of performing a formation pressure test, comprising:
inserting a bottom hole assembly (“BHA”) into a wellbore from the earth's surface to a first location within the wellbore through a subterranean formation, wherein the BHA comprises:
a drill bit; and
a formation testing tool comprising a battery and a fluid powered generator, both of which are configured to power the formation testing tool during a formation pressure test;
performing an initial formation pressure test with the formation testing tool and powering the formation testing tool with the fluid powered generator during the entire initial test while fluid is circulating in the wellbore;
determining, using a processor, drawdown parameters for a drawdown phase of the formation pressure test using the parameters and the results of the initial formation pressure test, wherein the formation pressure test comprises the drawdown phase and a buildup phase;
performing at least a portion of the formation pressure test with the formation testing tool while powering the formation testing tool with the battery while the fluid powered generator is unavailable due to insufficient fluid circulation in the wellbore; and
determining, using the processor, at least one characteristic of the formation based on results of the initial formation pressure test and the formation pressure test.
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