The table below summarizes key qualifications, skills and attributes each director brings to our board. The lack of a mark for a particular item does not mean the director does not possess that qualification or skill. However, a mark indicates a specific area of focus or expertise that the director brings to our board.
Emission Reduction Strategies
See the GHG Emissions Management section for additional details on other key emission management technologies.
Key to reducing: General CO2 emissions
Regenerative land management practices capture carbon and store it in the soil. In addition to removing carbon dioxide from the atmosphere, soil carbon sequestration is a nature-based solution that promotes improved soil health, cleaner surface water through improved watersheds and increases biodiversity due to grassland health. See the Emissions Management Committee highlight for more information on a collaboration with Grassroots Carbon, a company that specializes in soil sequestration of atmospheric carbon using regenerative agricultural practices.
Bitcoin Computer Mining Centers
Key to reducing: Flaring
Bitcoin mining utilizes stranded gas production to generate electricity to power the energy intensive computing necessary to produce bitcoin. This results in a beneficial use for gas that might alternatively have been flared, thus reducing overall flaring in our Bakken Asset.
Pneumatic Controllers, Emission-less Controllers and Pumps
Key to reducing: Process Emissions
Pneumatic controllers regulate different process conditions, such as pressure, temperature or fluid levels in tanks or vessels. Low-bleed or intermittent-bleed, gas-driven pneumatic controllers emit less gas than high-bleed pneumatic controllers. Pneumatic-driven pumps are used in a variety of applications but are frequently used for chemical injection needs. Using air instead of gas-powered pneumatic devices to operate pneumatic controllers and pumps also reduces GHG emissions by minimizing process emissions of methane and VOCs discharged when the pneumatic device actuates. Electric/mechanical driven, solar-powered controllers may be used in non-emergency service control applications when grid electricity is not feasible. The application is dependent upon specific service and power needs for the drive mechanisms. Our active program of installing or replacing instrument gas operated pneumatic controllers has resulted in the elimination of high-bleed pneumatic controllers in our U.S. assets.
Weighted Thief Hatches with High-performance Gaskets
Key to reducing: Fugitive Emissions
Adequately weighting thief hatches reduces the likelihood that vapors will escape from inside storage tanks. Gasket materials that hold up to the elements also reduce the likelihood of tank emissions. When designing facilities, Marathon Oil considers thief hatch weight and gasket material and selects products that reduce the likelihood of emissions from thief hatches. Using the data captured through LDAR, we’ve been installing and/or upgrading to the latest lower-leak thief hatch models in new facilities across our assets where data indicates it is warranted.
Infrared Cameras for Leak Detection
Key to reducing: Fugitive Emissions
Infrared camera inspections detect temperature differences that can indicate equipment gas leaks. We routinely survey pneumatic controllers and pumps for incorrect operation, exceeding federal requirements. In addition, we voluntarily utilized flyovers in our Permian acreage and performed additional OGI surveys targeting tanks in the Eagle Ford to further identify and correct fugitive emissions from leaks. We repair leaking equipment as soon as practicable, often on the same day the leak is found. Infrared camera monitoring, along with maintenance and operating practices, helps us minimize air emissions from company facilities. Training for infrared camera operators includes certification on thermal contrast, gas plume motion, camera distance limitations and camera adjustments for varying environmental conditions. All four U.S. business units use infrared cameras to detect leaks at new facilities. The scope and frequency of our leak detection programs are driven by regulatory requirements and risks such as facility size and production throughput. In addition to repairing leaks, we use the data obtained through LDAR to apply technological solutions and make strategic investments to prevent leaks.
Natural Gas Liquids (NGL) Removal Units
Key to reducing: Flaring and volatile organic compound emissions
These units reduce volumes of gas flared by condensing NGLs from the gas stream that would otherwise be flared due to either a lack of gas connection or gas takeaway capacity constraints. NGLs are condensed from the gas stream to a liquid, which is then transported via truck for sale.
Audio, Visual and Olfactory (AVO) Inspections
Key to reducing: Fugitive emissions
AVO inspectors use their senses of hearing, sight and smell to help determine if a facility is operating normally. A trained inspector can detect gas leaks. To mitigate the risks associated with gas leaks, qualified individuals conduct routine AVO inspections of our production locations. A program to survey, prioritize, address and verify is applied with regulations dictating the frequency of inspections. Field employees are trained to perform AVO inspections for possible leaks as a part of their overall competency training. New employees must demonstrate competency in safety and operating requirements before conducting field work without the supervision of more experienced employees.
Vapor Recovery Units (VRU) and Vapor Recovery Towers (VRT)
Key to reducing: Low Pressure Flaring
A VRU recovers vapors in crude oil or condensate tanks. A VRT is a tall pressure vessel installed between the production separators and liquid storage tanks to capture pressurized gas that would otherwise be sent to the tanks.
Reduced Emissions Completions (REC)
Key to reducing: Venting/Flaring
This practice captures gas produced during well completions and workovers following hydraulic fracturing. Portable equipment is brought on site to separate the gas from the solids and liquids produced during flowback. The gas can then be delivered to the sales pipeline or routed to a control device instead of being vented. RECs reduce methane, volatile organic compounds (VOC) and hazardous air pollutants (HAP) emissions during well cleanup. Routing gas to a sales line can eliminate or significantly reduce the need for flaring during flowback operations. Marathon Oil uses 100% reduced emissions completions in our U.S. operations.
Reduced Diesel Use
Key to reducing: Combustion
Replacing diesel generators with natural gas-fired generators reduces emissions. The majority of our active drilling rigs are dual-fuel, which reduces our consumption of diesel and improves air quality. We are currently reviewing equipment availability to continue piloting for fracturing needs.
Reducing Emissions from Liquids Unloading
Key to reducing: Venting
Artificial lift is a production technology that is used to remove the buildup of liquids that can impede the flow of natural gas through the well. We use several methods to further minimize emissions associated with unloading liquids from the well. While many factors contribute to the decision to use various forms of artificial lift, including the rate at which liquids accumulate in the wellbore, use of artificial lift can limit the need to manually unload a well. We typically rely on artificial lift methods where economic and feasible. In cases where manual unloading is required, we monitor 100% of manual unloading operations to minimize emissions from the process.
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