Paleohydrology of the Gulf of Mexico basin

Harrison, Wendy J.; Summa, Lori L.

doi:10.2475/ajs.291.2.109

Cited by 229 publications

(139 citation statements)

References 0 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…One common explanation found in the literature for this overpressure is disequilibrium compaction, in which sediment loading occurs at a faster rate than pore fluid can be expelled, thereby causing high pore fluid pressures because the fluid is also subject to the weight of the overburden [e.g., Harrison and Summa, 1991]. Many studies have, however, shown that mechanical compaction alone cannot explain the generation of overpressured zones [e.g., Kooi, 1997].…”

Section: One-dimensional Study Of Overpressure Generation In Sedimentmentioning

confidence: 99%

“…In subduction zones, fluid flow occurs in the accretionary wedge owing to pore space collapse due to mechanical shearing and loading of the subducting oceanic plate [Screaton et al, 1990] and by dehydration of minerals in the descending slab during prograde metamorphism [Peacock, 1990;Richard et al, 2007]. In extensional environments groundwater flow is induced within fault bounded continental rift basins by various mechanisms, seismogenic pumping [Sibson, 1994], compaction [Harrison and Summa, 1991], and density [Hanson, 1992], and topographic [Person and Garven, 1994] driven variations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A numerical model for coupled fluid flow and matrix deformation with applications to disequilibrium compaction and delta stability

Morency¹,

Huismans²,

Beaumont³

et al. 2007

J. Geophys. Res.

100

View full text Add to dashboard Cite

[1] A model is developed which couples fully saturated porous compaction to the viscous-plastic deformation of the skeleton matrix. The Darcy fluid flow during compaction is described by an advection-diffusion equation for the excess pressure with two source/sink terms that depend on the mechanical compressibility and viscous compaction of the pore space, the latter representing the effect of pressure solution. The incompressible deformation of the composite medium is described by a force balance equation and its rheology can be viscous, plastic, or viscoplastic (Bingham material). For the plastic and viscoplastic cases, the coupling between the compacting and plastically deforming parts of the system is through the Drucker-Prager frictional-plastic yield criterion modified by Terzaghi's principle, so that the yield strength depends on the effective dynamical pressure. The coupled system is solved using a two-dimensional (2-D) finite element method. Two problems are solved to demonstrate the behavior of our theory. The first considers compaction of a uniform sediment layer. The numerical results agree with the predictions of the nondimensional control parameters and previously published results. The second problem concerns 2-D kinematic progradation of deltaic sediments. Substratum and delta sediments have the same compaction properties and a Bingham rheology during deviatoric deformation, such that the delta undergoes linear postyield viscous flow. For certain depositional regimes, overpressure is generated. When pore pressures approach critical values, yielding occurs and the delta front fails and becomes unstable, spreading gravitationally under its own weight. The flow velocity is limited to geological rates by the Bingham viscosity. For the range of parameter values considered, pressure solution is the most effective mechanism for generating nearlithostatic fluid pressures that lead to initial failure, and it appears that mechanical compaction hardly contributes to the fluid overpressure at this stage.Citation: Morency, C., R. S. Huismans, C. Beaumont, and P. Fullsack (2007), A numerical model for coupled fluid flow and matrix deformation with applications to disequilibrium compaction and delta stability,

show abstract

Section: One-dimensional Study Of Overpressure Generation In Sedimentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A numerical model for coupled fluid flow and matrix deformation with applications to disequilibrium compaction and delta stability

Morency¹,

Huismans²,

Beaumont³

et al. 2007

J. Geophys. Res.

100

View full text Add to dashboard Cite

show abstract

“…Although the results shown here are for reservoir sandstones, they provide some insights regarding the effects of clay diagenesis in finer-grained lithologies, which would seemingly be even more susceptible to this mechanism of permeability reduction given their smaller pore sizes. Therefore, the effects reported here may also provide important petrophysicai models of clay diagenesis for evaluating subsurface rock properties used in sedimentary basin analysis of fluid pressure and migration (Harrison and Summa 1991;Hermanrud 1993;Bj0rkum and Nadeau 1996).…”

Section: Experimental Petrophysicsmentioning

confidence: 99%

An Experimental Study of the Effects of Diagenetic Clay Minerals on Reservoir Sands

Nadeau

1998

Clays and clay miner.

View full text Add to dashboard Cite

Abstract--Despite substantial scientific research efforts, accurate determination of the petrophysical effects of clay minerals on reservoir sands remains problematic. Diagenetic clays such as smectite and illite are of particular interest because of the pronounced effects these clays can have on reservoir quality. Here, results are reported from an experimental study based on the hydrothermal growth of smectite in synthetic sands. The sands contained quartz, dolomite and kaolinite, and were reacted at 175-200 ~ for 19-45 d. The hydrothermal reaction can be written as follows:dolomite + kaolinite + quartz --* smectite + calcite + C02 X-ray diffraction (XRD), electron microprobe (EMP) and electron diffraction (ED) analysis show that the synthetic Mg-rich smectite formed is saponite, with a cation exchange capacity (CEC) of about 100 meq/ 100 g. After reaction, brine permeability reductions of up to 98% were observed from the growth of less than 5% smectite. Scanning electron microscopy (SEM) observations of critical-point-dried reacted samples show that the clay behaves as a pervasive microporous cement with a complex pore-bridging texture affecting most of the available pore space. Morphologically, the clay is similar to naturally occurring diagenetic smectite from Gulf Coast sandstone reservoirs. The delicate clay texture collapses during airdrying and forms pore-lining masses. This phenomenon is similar to that observed for air-dried reservoir samples which contain dispersed diagenetic clays. An air-dried sample, then resaturated with brine, showed a marked increase in permeability. This increase is associated with the irreversible collapse of the clay texture. The experimental results indicate that the growth of diagenetic clay can severely reduce formation permeability, even at very low clay contents. The results also demonstrate the utility of hydrothermal experimental petrophysics for investigating the effects of diagenesis on rock properties.

show abstract

“…Cer tain types and many specific cases of hydrocarbon (oil, gas) accumulations around the world have been attributed to the effect of basinal groundwater flow (Harrison and Summa, 1991;Verwij, 2003). According to the hydraulic theory of petroleum migration (Tóth 1980), hydrocarbons can be mobilized in mature source rocks or carrier beds by groundwater flow and advected by its systems toward discharge areas in several different forms such as bubbles, globules, stringers, ionic solution, emulsion, and micelles.…”

Section: Transport and Accumulationmentioning

confidence: 99%

The theory of basinal gravity flow of groundwater and its impacts on hydrology in Japan

Töth

2010

Journal of Groundwater Hydrology

View full text Add to dashboard Cite

Gravity-driven groundwater flow at the scale of drainage basins (basinal flow) is influenced by topography, which controls the water-table position and shape, and geological framework. The theory of groundwater flow systems was developed in the 1960＇s, in an effort to reconcile field observation with the theory of fluid potential, supported by mathematical analysis. Groundwater flow systems have a hierarchical structure comprising local, intermediate, and regional flow regimes; each having recharge, through-flow, and discharge zones. The presence of high-or low-permeability layers at depth can cause conspicuous spatial distribution of discharge or recharge areas on the surface. Owing to the insitu interaction of groundwater and the surrounding environment, and the transport and accumulation processes, groundwater is considered a geologic agent. The concept of gravity-driven flow systems has provided a unifying theoretical background for understanding a diverse range of physical, chemical, and ecological phenomena. This article presents a brief over view of the theor y of gravity-driven groundwater flow and its roles as a geologic agent, and also describes how the theory was introduced to and adopted by groundwater hydrologists in Japan.

show abstract

Paleohydrology of the Gulf of Mexico basin

Cited by 229 publications

References 0 publications

A numerical model for coupled fluid flow and matrix deformation with applications to disequilibrium compaction and delta stability

A numerical model for coupled fluid flow and matrix deformation with applications to disequilibrium compaction and delta stability

An Experimental Study of the Effects of Diagenetic Clay Minerals on Reservoir Sands

The theory of basinal gravity flow of groundwater and its impacts on hydrology in Japan

Contact Info

Product

Resources

About