Carbon Intensity of United States Natural Gas Supply.
米国天然ガス供給の炭素強度 (AI 翻訳)
Zhihao Zhang, Jeff S. Rutherford, James Littlefield, Farah Ramadan, Mohamed Ali Saafi, Bo Ren, M. Y. Jabbar, Dimitri M. Saad, Philippine M. Burdeau, M. Masnadi, Adam R. Brandt
🤖 gxceed AI 要約
日本語
米国の100万以上の坑井から生産される天然ガスのライフサイクルGHG排出量を推計。最新の航空機観測データを統合し、メタン漏洩を高精度で捕捉。全GHG排出量は7.19億トンCO2eqで、EPA推計の2倍以上。平均炭素強度は15.99 gCO2eq/MJ。メタン漏洩・ベントが上流炭素強度の61%を占める。
English
This study estimates lifecycle GHG emissions from US natural gas supply using data from one million wells covering 91% of 2023 production. It integrates aerial measurements to capture methane superemitters. Total emissions are 719 MMT CO2eq, over twice EPA estimates. Average carbon intensity is 15.99 gCO2eq/MJ, with methane fugitives and venting accounting for 61% of upstream CI.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
米国産天然ガスは日本のLNG調達源の一つ。本研究成果は、調達先の炭素強度評価に活用可能であり、日本企業のScope3排出量算定や投資家向け開示（SSBJなど）に影響を与える可能性がある。
In the global GX context
This paper provides the most comprehensive estimate of US natural gas carbon intensity to date, revealing emissions more than double EPA figures. It underscores the importance of direct measurement for methane accounting, relevant to global disclosure frameworks like ISSB and CSRD, and to transition finance assessments of gas value chains.
👥 読者別の含意
🔬研究者:Offers a state-of-the-art method for life cycle GHG estimation integrating aerial data, relevant for methane accounting research.
🏢実務担当者:Provides carbon intensity benchmarks for LNG buyers and gas producers to assess supply chain emissions and inform reduction targets.
🏛政策担当者:Highlights the gap between inventory-based and measurement-based emissions, supporting stronger regulation of methane leaks.
📄 Abstract（原文）
Understanding greenhouse gas (GHG) emissions from natural gas systems is essential for transitioning to a low-carbon economy. This work estimates well-through-transmission GHG emissions of the US natural gas from one million wells covering 91% production in 2023. A high-resolution US oil and gas production area map is developed to harmonize spatial and tabular data from the oil and natural gas (O&NG) supply chain. We systematically integrate latest aerial campaign measurement into natural gas life cycle GHG emission estimates, capturing methane fugitives with better characterization of superemitter events. More than ten public and commercial data sets are integrated with an engineering-based unit process life cycle assessment (LCA) model. The estimated total GHG emissions from the US gas sector are 719 MMT CO2eq, more than twice the estimates of the US Environmental Protection Agency. The average well-through-transmission carbon intensity (CI) for US natural gas is 15.99 [15.14, 16.90] gCO2eq/MJ, with an upstream (exploration through processing) CI of 12.27 [11.84, 12.68] gCO2eq/MJ and a midstream (transmission) CI of 3.72 [3.30, 4.22] gCO2eq/MJ (bracketed values indicate uncertainty ranges). Methane fugitive and venting account for 61% and 21% of the upstream CI, an order of magnitude higher than flaring contributions (2.1%). Reducing methane fugitive and venting loss rates by 75% would reduce the upstream CI by half.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1021/acs.est.5c14196first seen 2026-05-05 22:05:15
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