Emission Mitigation Efforts
Our exploration and development activities are supported by the natural gas gathering and compression assets of Antero Midstream and by third-party gathering and compression arrangements. Our relationship with Antero Midstream allows us to obtain the necessary gathering and compression capacity for our anticipated production, which limits flaring of salable quality natural gas.
To minimize flaring emissions during completion activities, Antero utilizes balanced drill outs. This technique limits the amount of gas that reaches the surface during completions. Since the amount of gas that reaches the surface is minimal, the amount of gas required to be flared is also minimal. The minimal gas that reaches the surface is not of a saleable quality, and is destructed by a flare with a control efficiency of at least 98%. Antero Resources’ flaring intensity (natural gas flared during drilling and completions, divided by natural gas produced) is de minimus at 0.0021%. We attribute this to the infrastructure we have in place to take the gas produced when the well is ready for production and our use of balanced drill outs.
Three Phases of Separation and Vapor Recovery:
Antero makes every effort to capture all of the natural gas it produces and accomplishes this goal by using multiple stages of separation, along with vapor recovery units and vapor recovery towers during peak production. This engineering control minimizes the amount of working, breathing, and flashing emissions generated from the storage tanks. Emissions from the storage tanks are captured by a vapor recovery system to be sent into the pipeline, burned in an enclosed combustion device with a control efficiency of at least 98%, or a combination of both.
Additional GHG Mitigation Efforts
- Operation of a burner management system with three stages of pressure control to optimize combustor efficiency. We utilize combustors that are certified by the manufacturer to meet EPA performance standards.
- Implementation and operation of three stages of pressure control on our storage tanks
- Use of low-pressure separators (green completion units) during initial well flowback operations to recover methane and send it down a sales
- This enables the recovery of salable product and reduces methane emissions during flowback operations.
- Pressure relief valves are tested and repaired or replaced as necessary, reducing the amount of methane that is accidently released.
- Periodic plugging and abandoning of certain older vertical wells that were acquired in conjunction with property acquisitions. Plugging and abandoning older, lower producing wells can reduce methane emissions.
- Transition from intermittent bleed to low-bleed and air-controlled pneumatics at all new production facilities. We installed air-controlled pneumatics on 12 pads in 2019 where purchased power was available.
Antero’s GHG/Methane Reduction team, comprised of company leaders across different functional groups, reviews, analyzes, and determines whether emerging methane detection and quantification technologies can be implemented, best management practices, and new reduction technologies applicable to our operations. The standing agenda includes a discussion and status update of previously identified opportunities, new and emerging mitigation opportunities to explore, an update on our reporting and volunteer commitments, and a discussion on climate-related risks.