a head pressure of 4 6 kg cm2 based on this we asked the production area of activo cerro azul belonging to poza rica altamira a portable separator installed to measure the volume of gas and liquid before closing the well with the well closed and using slickline the well was calibrated with a printing block of 2 5 16 going down u201c free u201d to 1060 m subsequently the accessory u201c collar stop u201d was descended and anchored at 960 m two pressure and temperature high resolution probes were programmed and the device of downhole shut in was assembled with check valve and the two probes connected to their respective battery the trial period took place after starting the pneumatic gas injection pumping producing gas and liquid toward liquids dam and subsequently carry it to portable separator for measurement once the probe was retrieved and pressure information obtained we proceeded to perform the analysis fig3 shows the total time spent on the test of pressure variation pressure trend pressure increase curve and decrease curve the buildup test shows a trend fairly good almost perfect without distortion or abnormalities during development this is because the downhole shut in was effective and there was no leakage through the seals and the interior of the check valve calibrated to u2153 of downhole pressure the.