Open AccessHydrocarbon generation potential of residual kerogens in high-over matured shale rocks and its contribution to shale gas reserves
Author(s) -
Jin Xu,
Zhifu Wei,
Qian Deng,
Bin Cheng,
Oluwabamise Lekan Faboya,
Zewen Liao
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/360/1/012045
Subject(s) - kerogen , oil shale , source rock , geology , hydrocarbon , pyrolysis , methane , maturity (psychological) , geochemistry , natural gas , residual , shale gas , oil shale gas , mineralogy , shale oil , structural basin , paleontology , chemistry , developmental psychology , psychology , organic chemistry , algorithm , computer science
A low matured shale rock from Lucaogou Formation in the Santanghu Basin was thermally simulated using semi-open system pyrolysis experiment in attempt to evaluate its late gas generation potential. The Rock-Eval results showed that the residual kerogen in the high-over matured shale rocks still possess some hydrocarbon generation potential. The amount of the pyrolyzable hydrocarbons (S2) generated from the residual kerogen ranged from 0.57 to 1.02 mg HC/g rock. The S2 and hydrogen index (HI) values began to diminish at EasyR o > 1.45%. About 1 m 3 /t rock of methane was estimated from Lucaogou Formation at high-over maturity stage. This indicates that the hydrocarbon generation potential of residual kerogens in the high-over matured shale rocks have a significant contribution to shale gas reserves.