Chemical bleaching indicates episodes of fluid flow in deformation bands in sandstone

Parry, William; Chan, Marjorie A.; Beitler, Brenda

doi:10.1306/09090303034

Cited by 95 publications

(73 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mandl et al 1977;Bernabe & Brace 1990). This provides a way for fluids to enter the deformation band, and the entrance of reducing fluids at this stage offers an explanation of the bleaching of deformation bands (Parry et al 2004). A similar mechanism may explain cementation within low-porosity cataclastic deformation bands (Fowles & Burley 1994;Labaume & Moretti 2001;Parnell et al 2004;Sample et al 2006).…”

Section: The Effect Of Dissolution and Cementationmentioning

confidence: 88%

See 1 more Smart Citation

Deformation bands in sandstone: a review

Fossen

Schultz

Shipton

et al. 2007

JGS

602

344

View full text Add to dashboard Cite

Deformation bands are the most common strain localization feature found in deformed porous sandstones and sediments, including Quaternary deposits, soft gravity slides and tectonically affected sandstones in hydrocarbon reservoirs and aquifers. They occur as various types of tabular deformation zones where grain reorganization occurs by grain sliding, rotation and/or fracture during overall dilation, shearing, and/or compaction. Deformation bands with a component of shear are most common and typically accommodate shear offsets of millimetres to centimetres. They can occur as single structures or cluster zones, and are the main deformation element of fault damage zones in porous rocks. Factors such as porosity, mineralogy, grain size and shape, lithification, state of stress and burial depth control the type of deformation band formed. Of the different types, phyllosilicate bands and most notably cataclastic deformation bands show the largest reduction in permeability, and thus have the greatest potential to influence fluid flow. Disaggregation bands, where non-cataclastic, granular flow is the dominant mechanism, show little influence on fluid flow unless assisted by chemical compaction or cementation.

show abstract

Section: The Effect Of Dissolution and Cementationmentioning

confidence: 88%

“…However, there are other cases where deformation bands appear to be conduits for fluids (e.g. Parry et al 2004;Sample et al 2006). The influence of deformation bands on fluid flow depends on their internal permeability relative to the surrounding rock.…”

Section: Petrophysical Propertiesmentioning

confidence: 99%

Deformation bands in sandstone: a review

Fossen

Schultz

Shipton

et al. 2007

JGS

602

344

View full text Add to dashboard Cite

show abstract

“…Strongly reducing conditions may also lead to the formation of pyrite or magnetite from early hematite within reservoir sandstones (e.g. Burley 1984;Kilgore and Elmore 1989;Parry et al 2004). Many authors consider HC as most likely reducing agents (Surdam et al 1993;Garden et al 2001;Parry et al 2004).…”

Section: Mesodiagenesismentioning

confidence: 99%

“…Burley 1984;Kilgore and Elmore 1989;Parry et al 2004). Many authors consider HC as most likely reducing agents (Surdam et al 1993;Garden et al 2001;Parry et al 2004). Other possibilities to remove hematite from red beds include iron reduction by organic acids or hydrogen sulphide, pH decrease by influx of CO 2 , or microbial Fe-removal at temperatures below 120°C (e.g.…”

Section: Mesodiagenesismentioning

confidence: 99%

Contrasting red bed diagenesis: the southern and northern margin of the Central European Basin

Schöner

Gaupp

2005

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

show abstract

“…This has variously been attributed to bleaching by buoyant hydrocarbons and methane rich brine (Beitler et al, 2003(Beitler et al, , 2005Chan et al, 2000;Garden et al, 2001;Parry et al, 2004Parry et al, , 2009) and by dense CO 2 -charged brine containing methane or sulfide reductants (Loope et al, 2010(Loope et al, , 2011Potter-McIntyre et al, 2013;Wigley et al, 2012, Figure 6. (A) Bleached basal sandstones of the Entrada Sandstone hosting CO 2 charged fluids.…”

Section: Co2w55 Core Stratigraphymentioning

confidence: 99%

Scientific drilling and downhole fluid sampling of a natural CO<sub>2</sub> reservoir, Green River, Utah

et al. 2013

View full text Add to dashboard Cite

Abstract. A scientific borehole, CO2W55, was drilled into an onshore anticline, near the town of Green River, Utah for the purposes of studying a series of natural CO2 reservoirs. The objective of this research project is to recover core and fluids from natural CO2 accumulations in order to study and understand the long-term consequences of exposure of supercritical CO2, CO2-gas and CO2-charged fluids on geological materials. This will improve our ability to predict the security of future geological CO2 storage sites and the behaviour of CO2 during migration through the overburden. The Green River anticline is thought to contain supercritical reservoirs of CO2 in Permian sandstone and Mississippian-Pennsylvanian carbonate and evaporite formations at depths > 800 m. Migration of CO2 and CO2-charged brine from these deep formations, through the damage zone of two major normal faults in the overburden, feeds a stacked series of shallow reservoirs in Jurassic sandstones from 500 m depth to near surface. The drill-hole was spudded into the footwall of the Little Grand Wash normal fault at the apex of the Green River anticline, near the site of Crystal Geyser, a CO2-driven cold water geyser. The hole was drilled using a CS4002 Truck Mounted Core Drill to a total depth of 322 m and DOSECC’s hybrid coring system was used to continuously recover core. CO2-charged fluids were first encountered at ~ 35 m depth, in the basal sandstones of the Entrada Sandstone, which is open to surface, the fluids being effectively sealed by thin siltstone layers within the sandstone unit. The well penetrated a ~ 17 m thick fault zone within the Carmel Formation, the footwall damage zone of which hosted CO2-charged fluids in open fractures. CO2-rich fluids were encountered throughout the thickness of the Navajo Sandstone. The originally red sandstone and siltstone units, where they are in contact with the CO2-charged fluids, have been bleached by dissolution of hematite grain coatings. Fluid samples were collected from the Navajo Sandstone at formation pressures using a positive displacement wireline sampler, and fluid CO2 content and pH were measured at surface using high pressure apparatus. The results from the fluid sampling show that the Navajo Sandstone is being fed by active inflow of CO2-saturated brines through the fault damage zone; that these brines mix with meteoric fluid flowing laterally into the fault zone; and that the downhole fluid sampling whilst drilling successfully captures this dynamic process.

show abstract

Chemical bleaching indicates episodes of fluid flow in deformation bands in sandstone

Cited by 95 publications

References 30 publications

Deformation bands in sandstone: a review

Deformation bands in sandstone: a review

Contrasting red bed diagenesis: the southern and northern margin of the Central European Basin

Scientific drilling and downhole fluid sampling of a natural CO<sub>2</sub> reservoir, Green River, Utah

Contact Info

Product

Resources

About

Chemical bleaching indicates episodes of fluid flow in deformation bands in sandstone

Cited by 95 publications

References 30 publications

Deformation bands in sandstone: a review

Deformation bands in sandstone: a review

Contrasting red bed diagenesis: the southern and northern margin of the Central European Basin

Scientific drilling and downhole fluid sampling of a natural CO&lt;sub&gt;2&lt;/sub&gt; reservoir, Green River, Utah

Contact Info

Product

Resources

About

Scientific drilling and downhole fluid sampling of a natural CO<sub>2</sub> reservoir, Green River, Utah