Summary

This job was executed over two periods, while 1 treatment was did not give us a 100% seal. The second treatment was redesigned to continuously inject chemicals throughout the entire pressurization cycle to ensure that active sealant was always covering the leak point. As it was inconclusive from earlier diagnostic and treatment, the treatment was set up for two possible leak point, the first at75’ the second at 146’.

Due to ballooning both leak points were designed to have chemical both above and below as annulus flow is in the negative direction as the leak allows fluid to escape . Nitrogen was again used to displace the annulus to gas while taking returns at the B annulus. The 9-5/8’ was pressurized with nitrogen to 2000pisg with slight communicatio to the 13-3/8’ casing. Pressure rate build up was 20psig per hour into B and annular returns were inconsistent and gas circulated with only minimal fluid returns. The annulus was then loaded and pressurized to 3070psig with 7,4 bbls SEALMAKER VCRS treatment set up in 4 sequences spotting the lead at 166’ of 20’ below the lowest leak point. Initial leak off rate was 20psig/min to 1910psig. 1,5 bbls additional chemical was pumped and the pressure and the pressure was raised to 2880psig, pressure leak off had been slowed to 10psig. Nitrogen was then set to feed to achieve a low pressure set at 1500psig, Setting was achieved at 1524psig with an estimated 1-2ft3 gas consumed.

The well remained stable over night with no pressure build-up into B annulus. The gas cushion was bled off and additional chemical was injected as the system pressure was raised incrementally to 3000psig over 4 hours. The well was shut in at 2997psig for 15 hours with zero pressure loss and zero communication into B annulus. The wing valve were then closed and equipment rigged down and demobilized.