At the 1:17 mark.
And since you insist on pictures instead of accepting spoken word:
A large kick (1) was recently taken on a well being horizontally drilled for unconventional gas production in
the Montney formation. The kick was caused by a fracturing operation being conducted on an adjacent
horizontal well. Fracture sand was circulated from the drilling wellbore, which was 670m from the wellbore
undergoing the fracturing operation.
To date, the BC Oil and Gas Commission (Commission) is aware of 18 fracture communication incidents in
B.C. and one in Western Alberta as follows:
• Five incidents of fracture stimulation resulting in communication with an adjacent well
• Three incidents of drilling into a hydraulic fracture formed during a previous stimulation
on an adjacent well and containing high pressure fluids.
• Ten incidents of fracture stimulations communicating into adjacent producing wells.
• One incident of fracture stimulation communication into an adjacent leg on the same
well for a multi-lateral well.
To date, all kicks taken during drilling were successfully controlled through conventional drilling safety
measures (e.g. circulation with kill mud and/or reduction of the invading fracture stimulation pressure through
controlled venting). Large kicks resulted in volumes up to 80m3 of fluids produced to surface. Invading fluids
have included water, carbon dioxide, nitrogen, sand, drilling mud, other stimulation fluids and small amounts
Fracture fluids introduced into producing wells result in suspended production, substantial remediation costs
and pose a potential safety hazard.
Incidents have occurred in horizontal wells with separation distances between well bores ranging from 50m