Commissioner Dana Murphy in January provided updates on the latest developments in the Oklahoma Corporation Commission’s (OCC) earthquake response measures.
“As I’ve said before, it’s very important for everyone to be kept informed and understand what’s being done,” said Murphy. “At the same time, it should be stressed that additions or changes are possible at any time. We know far more now than we did three years ago, but there is obviously much more to be learned.”
- The OCC’s “yellow light” permitting program now extends the area of seismicity review for any proposed disposal well to those:
- proposed within three miles of a seismically active fault
- proposed within three miles of a stressed fault, even in the absence of seismicity
- proposed within six miles of an earthquake “swarm”
- A new rule has been proposed to require disposal well operators to notify the OCC at the start of a disposal well’s initial injection
- New rules have gone into effect increasing from monthly to daily the required recording of well pressure and volume from disposal wells that dispose into the Arbuckle formation
- Under the new rules, Mechanical Integrity Tests for wells disposing of volumes of 20,000 barrels a day or more have increased from once every five years to every year, or more often if so directed by the OCC
- For those wells injecting into the Arbuckle formation, any question regarding the well’s actual depth must be addressed using modern technology to determine true depth, and if there is any issue with depth, the well is directed to be shut-in and cannot be restarted until the issue is addressed and permission for restart received from the oil and gas division
- The OCC is beginning a joint project with the Oklahoma Secretary of Energy and Environment that will provide essential reservoir and other data on the Arbuckle formation.
- Recent staff changes within the OCC’s Oil and Gas Conservation Division will allow key staffers to devote their entire work day to the issue of seismicity
- The OCC is an active participant on Governor Mary Fallin’s Coordinating Council on Seismic Activity
Murphy also noted that these ongoing measures do not constitute the OCC’s final plan for seismic activity.
“What we are doing now is the result of an open, flexible process based on sound scientific data, and driven by the utmost necessity to address this issue,” she said. “Above all, that process must and will continue.”