Page 253 - Hydrocarbon Exploration and Production Second Edition

240 Production Testing and Bottom Hole Pressure Testing

Figure 10.11 Gauge cable and clamp being installed beside tubing (photograph copyright
H. Crumpton).

test string
open hole
section inflatable
packer
reservoir

perforated inflatable
joint packer
plug
Open hole DST Cased hole DST
Figure 10.12 Drill stem testing (DST).

prevented by the upper packer, and a good seal is required to ensure safety.
Therefore the openhole DST can only be run where the openhole section is in
gauge. The safe length of the openhole test section would be determined by the
strength of the casing shoe. If several intervals are to be tested independently, then a