Systems and methods for performing downhole formation testing operations

A method, comprising:

• deploying and setting a first downhole barrier of a downhole formation testing system within a wellbore at a first downhole location extending through a subterranean formation;
• deploying and setting a second downhole barrier of the downhole formation testing system within the wellbore at a second downhole location above the first downhole barrier, wherein the second downhole barrier comprises:
• a bore extending axially therethrough to enable fluids to flow therethrough;
• an upper sensor positioned on an upper side of the second downhole barrier;
• and
• a lower sensor positioned on a lower side of the second downhole barrier;
• deploying a downhole toolstring of a downhole formation testing system to a third downhole location within the wellbore above the first and second downhole barriers, wherein the downhole toolstring comprises a single packer positioned near a lower end of the downhole toolstring;
• setting the single packer within the wellbore to isolate first and second zones of interest of the subterranean formation in a lower portion of the wellbore below the single packer from an upper portion of the wellbore above the single packer;
• and
• after setting the single packer within the wellbore:
• using the downhole toolstring to perform downhole formation testing on a first fluid received from a first zone of interest by the downhole toolstring in a first interval of the wellbore between the first downhole barrier and the second downhole barrier based at least in part on the flow and/or volume rates of the first and second fluids detected by the first and second sensors of the second downhole barrier;
• and
• using the downhole toolstring to perform downhole formation testing on a second fluid received from a second zone of interest by the downhole toolstring in a second interval of the wellbore between the second downhole barrier and the single packer based at least in part on the flow and/or volume rates of the first and second fluids detected by the first and second sensors of the second downhole barrier.