FN Archimer Export Format
PT J
TI Dynamics of fault-fluid-hydrate system around a shale-cored anticline in deepwater Nigeria
BT 
AF SULTAN, Nabil
   RIBOULOT, Vincent
   KER, Stephan
   MARSSET, Bruno
   GELI, Louis
   TARY, Jean-Baptiste
   KLINGELHOEFER, Frauke
   VOISSET, Michel
   LANFUMEY, Valentine
   COLLIAT, Jean-Louis
   ADAMY, Jerome
   GRIMAUD, S.
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:1;8:1;9:1;10:2;11:3;12:2;
FF 1:PDG-REM-GM-LES;2:PDG-REM-GM-LES;3:PDG-REM-GM-LGG;4:PDG-REM-GM-LGG;5:PDG-REM-GM;6:PDG-REM-GM-LGG;7:PDG-REM-GM-LGG;8:PDG-REM-GM-CTD;9:PDG-REM-GM-LES;10:;11:;12:;
C1 IFREMER, Dept Geosci Marines, F-29280 Plouzane, France.
   Total, F-64018 Pau, France.
   Total, F-92078 Paris, La Defense, France.
C2 IFREMER, FRANCE
   TOTAL, FRANCE
   TOTAL, FRANCE
SI BREST
SE PDG-REM-GM-LES
   PDG-REM-GM-LGG
   PDG-REM-GM
   PDG-REM-GM-CTD
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 3.021
TC 25
UR https://archimer.ifremer.fr/doc/00060/17106/14624.pdf
LA English
DT Article
AB Gas hydrates were recovered by coring at the eastern border of a shale-cored anticline in the eastern Niger Delta. To characterize the link between faults and fluid release and to identify the role of fluid flow in the gas hydrate dynamics, three piezometers were deployed for periods ranging from 387 to 435 days. Two of them were deployed along a major fault linked to a shallow hydrocarbon reservoir while the third monitored the fluid pressure in a pockmark aligned above the same major fault. In addition, 10 ocean-bottom seismometers (OBS) were deployed for around 60 days. The piezometers simultaneously registered a prolonged fluid flow event lasting 90 days. During this time, OBS measurements record several episodic fluid release events. By combining and analyzing existing and newly acquired data, we show that the fluid-fault system operates according to the following three stages: (1) upward pore fluid migration through existing conduits and free gas circulation within several shallow sandy layers intersecting the major fault, (2) gas accumulation and pore pressure increases within sandy-silty layers, and (3) hydrofracturing and fluid pressure dissipation through sporadic degassing events, causing pore fluid circulation through shallow sandy layers and drawing overlying seawater into the sediment. This paper clearly demonstrates how an integrated approach based on seafloor observations, in situ measurements, and monitoring is essential for understanding fault-fluid-hydrate systems.
PY 2011
PD DEC
SO Journal Of Geophysical Research-solid Earth
SN 0148-0227
PU Amer Geophysical Union
VL 116
IS B12110
UT 000298787000001
DI 10.1029/2011JB008218
ID 17106
ER

EF