At Williams, we’re proud of our role in bringing clean natural gas to communities across the country. And, we’re making a difference in the overall reduction of carbon dioxide emissions.
Each year, Williams prepares and submits an annual greenhouse gas inventory to EPA for the company’s midstream gathering, natural gas processing, and interstate transmission and storage operations. Combusted, vented, and fugitive greenhouse gas emissions are tracked and reported by Williams to EPA.
Carbon dioxide and methane are the predominant greenhouse gases in our inventory. Carbon dioxide comprises 88.2% of the inventory and is mainly generated from the combustion of natural gas, which provides the power to move natural gas through our system. We move natural gas from the wellhead to market and our job is to move it as efficiently as possible. We install new engines, turbines, and other internal and external combustion equipment across the enterprise to expand operations and improve operational performance and efficiency. We also use optical gas imaging (OGI) cameras utilizing thermal and infrared technology to detect and repair equipment leaks, and to ensure safe working environments. These measures collectively result in decreased fuel consumption and lower greenhouse gas emissions.
Methane emissions make up 11.7% of Williams’ carbon footprint. We implement measures to manage and reduce methane emissions such as perform leak detection and repair events, replace compressor rod packing, replace wet seal compressors with dry seal compressors, track and report blowdowns, and route methane emissions to flare where technically and economically feasible. Williams recognizes the importance of identifying and using best management practices to further reduce emissions of methane and other greenhouse gases at these and other Williams facilities.
Over the past five years, we have reduced our methane emissions from gas processing plants and transmission compressor stations by more than 50%. Over the same period, the throughput through these facilities increased 20%.