TY - JOUR
T1 - Subsurface methane leakage in unconventional shale gas reservoirs
T2 - A review of leakage pathways and current sealing techniques
AU - Yudhowijoyo, Azis
AU - Rafati, Roozbeh
AU - Sharifi Haddad, Amin
AU - Raja, Moiz Shahid
AU - Hamidi, Hossein
N1 - The authors would like to thank the School of Engineering at the University of Aberdeen for providing the required facilities to complete this study.
PY - 2018/6
Y1 - 2018/6
N2 - Shale gas extraction is seen to be a bridge fuel to the future due to lower GHG emissions compared to oil. However, it is also one of the most controversial topics due to the involvement of fracking in their production. Based on the analysis performed in this review we found that despite hydraulic fracture propagation being a possible conduit of methane leakage, the major cause of gas leakage is through leaking wells within the vicinity of fracturing sites. Remedial attempts have revealed promising yet inconsistent results, with no concrete method established for the methane leakage mitigation from shale gas wells.
AB - Shale gas extraction is seen to be a bridge fuel to the future due to lower GHG emissions compared to oil. However, it is also one of the most controversial topics due to the involvement of fracking in their production. Based on the analysis performed in this review we found that despite hydraulic fracture propagation being a possible conduit of methane leakage, the major cause of gas leakage is through leaking wells within the vicinity of fracturing sites. Remedial attempts have revealed promising yet inconsistent results, with no concrete method established for the methane leakage mitigation from shale gas wells.
KW - methane leakage
KW - shale gas
KW - greenhouse gas emission
KW - hydraulic fracturing
KW - aquifer contamination
KW - unconventional reservoirs
U2 - 10.1016/j.jngse.2018.04.013
DO - 10.1016/j.jngse.2018.04.013
M3 - Article
VL - 54
SP - 309
EP - 319
JO - Journal of Natural Gas Science & Engineering
JF - Journal of Natural Gas Science & Engineering
SN - 1875-5100
ER -