Evaluation of Fugitive Methane Emission factor for Oil and Gas in India

摘要

Methane Emissions from the Oil and Gas Industry has been a major Environmental concern for over a long period of time. This work estimates the Methane emissions from the Oil and Gas industry in India. The work has used the guidelines of IPCC (Intergovernmental Panel for Climate Change) which has been a pioneer in bringing regulations relating to environmental concerns. The IPCC guidelines define a two level hierarchical structure for source categories related to the oil and gas industries. This project aims at estimating the Emissions of Methane from the Industry. For this proper activity data and methodology is required. National activity data in respect of oil and natural gas systems for the years 1990 to 2009 was collected. Methane emissions have been calculated for all the activities listed above. The methane emission factor used for calculating the emissions from the various activities are either used directly from the IPCC or they have been particularly calculated. For activities including oil refining, transportation and storage of oil, gas production, processing, transmission and other leakages default emission factors of Tier 1 Approach of IPCC have been considered.India specific methane emission factors have been evaluated for oil production and venting and flaring activities. This method is clearly defined in the IPCC under Tier 2 approach. The future scope of this work is also to formulate emission factor using Tier 2 Approach of IPCC guidelines for the country. For other ctivities for which some study has already been done and Tier 2 factors have already been calculated in this work, the next work is to implement Tier 3 approach of the IPCC guidelines for continuous monitoring of the emission of methane to the atmosphere.