Description job: FRACSEAL application
Type of fluids: OBM
Phase: 121/4” open hole
Potential problem: Loss circulation
A 1,200bbl mud was mixed and treated with 2ppb FRACSEAL fine. The 121/4” horizontal hole was drilled from 5,692ft to 5,770ft with dynamic loss of 150bph. Flow check, mud level dropped, POOH to 133/8” casing shoe at 4,375ft.
Mixed and pumped 100bbl FRACSEAL LCM pill #1 (172ppb total LCM concentration) with 10ppb FRACSEAL fine, 23ppb FRACSEAL medium, 18ppb FRACSEALcoarse through the circulating sub and soak into the formation. The well still had losses. Filled in annulus – no level. Mixed and pumped 200bbl FRACSEAL LCM pill #2 (173ppb total LCM concentration) with 11ppb FRACSEAL fine, 13ppb FRACSEAL medium, 23ppb FRACSEAL coarse through circulating sub. Had 75% returns while pumping LCM at 30spm (suspected first LCM Pill worked well). POOH to 133/8” shoe at 4,375ft and soak into the formation, well static.
Drilling then continued in the 121/4” hole to casing point with full returns.