Methane emission from natural gas seeps and mud volcanoes in Transylvania (Romania)

From 2015 to 2018, TGS conducted a comprehensive multiclient oil and gas seep hunting survey in the Gulf of Mexico. The basis for identifying seeps on the sea bottom was a high-resolution Multi-Beam Echo Sounder survey, mapping approximately 880,000 km2 of the sea bottom deeper than 750 m water depth, at a bathymetric resolution of 15 m and a backscatter resolution of 5 m. We have identified more than 5000 potential oil and/or gas seeps, and of those, we cored approximately 1500 for hydrocarbon geochemical analysis. The sea bottom features best related to hydrocarbon seepage in the GoM are high backscatter circular features with or without bathymetric expression, high backscatter features with “flow” appearance, mud volcanoes, pock marks, brine pools, “popcorn” texture, faults, and anticlinal crests. We also tracked gas plumes in the water column back to the sea bottom to provide an additional criterion for hydrocarbon seepage. Cores from sea bottom targets recovered liquid oil, tar, and gas hydrates. Oil extract and gas analyses of samples from most target types produced values substantially higher than background in oil and gas.

Download Full-text

Methane Emission from Mud Volcanoes

NATO Science Series - Mud Volcanoes, Geodynamics and Seismicity ◽

10.1007/1-4020-3204-8_12 ◽

2005 ◽

pp. 141-146 ◽

Cited By ~ 5

Author(s):

Giuseppe Etiope

Keyword(s):

Methane Emission ◽

Mud Volcanoes

Download Full-text

Comparing facility-level methane emission rate estimates at natural gas gathering and boosting stations

Elem Sci Anth ◽

10.1525/elementa.257 ◽

2017 ◽

Vol 5 ◽

Cited By ~ 15

Author(s):

Timothy L. Vaughn ◽

Clay S. Bell ◽

Tara I. Yacovitch ◽

Joseph R. Roscioli ◽

Scott C. Herndon ◽

...

Keyword(s):

Natural Gas ◽

Confidence Intervals ◽

Methane Emission ◽

Emission Rate ◽

National Study ◽

Aircraft Measurements ◽

Component Level ◽

Facility Level ◽

Unburned Fuel ◽

Methane Emission Rate

Coordinated dual-tracer, aircraft-based, and direct component-level measurements were made at midstream natural gas gathering and boosting stations in the Fayetteville shale (Arkansas, USA). On-site component-level measurements were combined with engineering estimates to generate comprehensive facility-level methane emission rate estimates (“study on-site estimates (SOE)”) comparable to tracer and aircraft measurements. Combustion slip (unburned fuel entrained in compressor engine exhaust), which was calculated based on 111 recent measurements of representative compressor engines, accounts for an estimated 75% of cumulative SOEs at gathering stations included in comparisons. Measured methane emissions from regenerator vents on glycol dehydrator units were substantially larger than predicted by modelling software; the contribution of dehydrator regenerator vents to the cumulative SOE would increase from 1% to 10% if based on direct measurements. Concurrent measurements at 14 normally-operating facilities show relative agreement between tracer and SOE, but indicate that tracer measurements estimate lower emissions (regression of tracer to SOE = 0.91 (95% CI = 0.83–0.99), R2 = 0.89). Tracer and SOE 95% confidence intervals overlap at 11/14 facilities. Contemporaneous measurements at six facilities suggest that aircraft measurements estimate higher emissions than SOE. Aircraft and study on-site estimate 95% confidence intervals overlap at 3/6 facilities. The average facility level emission rate (FLER) estimated by tracer measurements in this study is 17–73% higher than a prior national study by Marchese et al.

Download Full-text

Global methane emission through mud volcanoes and its past and present impact on the Earth’s climate—a comment

International Journal of Earth Sciences ◽

10.1007/s00531-005-0480-5 ◽

2005 ◽

Vol 94 (3) ◽

pp. 490-492 ◽

Cited By ~ 12

Author(s):

Alexei V. Milkov ◽

Giuseppe Etiope

Keyword(s):

Methane Emission ◽

Mud Volcanoes ◽

Earth’S Climate

Download Full-text

Methane emission from the mud volcanoes of Sicily (Italy)

Geophysical Research Letters ◽

10.1029/2001gl014340 ◽

2002 ◽

Vol 29 (8) ◽

pp. 56-1-56-4 ◽

Cited By ~ 64

Author(s):

G. Etiope ◽

A. Caracausi ◽

R. Favara ◽

F. Italiano ◽

C. Baciu

Keyword(s):

Methane Emission ◽

Mud Volcanoes

Download Full-text

Venezuela in the Twentieth Century

Venezuela ◽

10.1093/wentk/9780199783298.003.0003 ◽

2015 ◽

Author(s):

Miguel Tinker Salas

Keyword(s):

Twentieth Century ◽

Natural Gas ◽

Indigenous People ◽

The Earth ◽

Viscous Substance ◽

Gas Seeps

When was oil discovered? Petroleum and natural gas seeps, produced by fissures in the earth, dot the landscape in various regions of eastern and western Venezuela. The indigenous people labeled these occurrences menes, and they used the viscous substance to weatherproof structures,...

Download Full-text

The extent of methane emission associated with the natural gas industry in southeastern Poland.

10.5194/egusphere-egu21-12214 ◽

2021 ◽

Author(s):

Paweł Jagoda ◽

Jarosław Nęcki ◽

Jakub Bartyzel ◽

Piotr Korbeń ◽

Michał Kud ◽

...

Keyword(s):

Natural Gas ◽

Methane Emission ◽

Oil And Gas ◽

Science Studies ◽

Oil And Gas Industry ◽

Detection Methods ◽

Current Phase ◽

Large Area ◽

Gas Wells ◽

Gas Industry

Goal of the CCAC project is to observe urban emission of natural gas over Canada and different countries in Europe. Our team was responsible for the Silesia and Sub-Carpathia regions in southern Poland. In this presentation we will focus on the methane emission measurements from gas pipelines, storages, gas wells as well as gathering and processing facilities, which was realized by our team in years 2018-2020.South eastern Poland is rather rural part of the country with rich history of oil and gas industry going back to the XVI-th century. Currently Carpathians and Carpathian Foredeep regions gas industry produces 1.35 BILLIONS of m3 [1]The measurements have been carried out since summer 2016 mainly with Micro-Portable Greenhouse Gas Analyzer &#8216;Los Gatos Research, MGGA-918&#8217; mounted on board of a car. We also had capability to deploy analyser in difficult terrain with its own power supply. During our measurements our team visited over 300 gas wells. We found that over half of these sites show elevated methane concentrations which can be attributed to either gas well itself or soil fractures around site. Transects paths were designed to follow pipelines. This allowed us to monitor possible leaks from the natural gas infrastructure. However there are numerous possible sources in close proximity of pipelines. We will discuss detection methods and variability study for dozens of transects. As of the 2017 only 9 gathering and processing facilities report release which states the emission of 1.8*106 m3 CH4 per year. One of the focus points of our project was to estimate how uncertain were methane emission from O&G in Poland which at current phase concludes methane emission of 7.5-40 kt CH4/yearDuring the presentation we will outline challenges in carrying out measurements with GPM, OTM 33a methods that were performed alongside large-area screening. We are developing oversized flow chamber method. Mobile structure is built in the shape of a dome. It has the radius of 3 meters which gives the chamber volume of 49 m3.This work was funded under the Climate and Clean Air Coalition (CCAC) Oil and Gas Methane Science Studies.[1]PSG, &#8222;Bilans zasob&#243;w z&#322;&#243;&#380; kopalin w Polsce wg stanu na 31 XII 2019 r,&#8221; PIG-PIB, Warsaw, 2020.&#160;

Download Full-text