Hydrodynamic activity and tilted oil-water contacts in the North Sea

Dennis, H.; Baillie, John; Holt, Torleif; Wessel-Berg, Dag

doi:10.1016/s0928-8937(00)80016-8

Cited by 45 publications

(69 citation statements)

References 8 publications

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“…and hydrodynamic studies in the UK, Norwegian and Danish sectors of the Central Graben (Dennis et al, 2000;Moss et al, 2003;Surlyk et al, 2003;Dennis et al, 2005). These studies showed the existence of dynamic basin-wide aquifer conditions with flow directed towards the Step Graben and northern part of the Dutch Central Graben.…”

Section: Pressure Distribution and Fluid Dynamics In Cenozoic North Smentioning

confidence: 98%

Pressure and fluid dynamic characterisation of the Dutch subsurface

Verweij

Simmelink

Underschultz

et al. 2012

Netherlands Journal of Geosciences

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This paper presents and discusses the distribution of fluid and leak-off pressure data from the subsurface of onshore and offshore Netherlands in relation to causes of formation fluid overpressure and the permeability framework. The observed fluid pressure conditions demonstrate a clear regional difference between the southern and the north and north-eastern part of the study area. In the southern area, formation fluid pressures are close to normal and well below measured leak-off pressures. In the north, formation fluids are overpressured and may locally even approach the measured leak-off pressures. The regional differences in fluid overpressure can, in large part, be explained by differences in geologic framework and burial history. In the south, relatively low rates of sedimentary loading and the presence of relatively permeable sedimentary units have led to the currently observed normally pressured conditions. In the northern area, relatively rapid Neogene sediment loading plays an important role in explaining the observed overpressure distributions in Cenozoic mudstones, Cretaceous Chalk and Rijnland groups, and probably also in Jurassic units. The permeability framework of the northern and north-eastern area is significantly affected by Zechstein and Triassic salt deposits and structures. These units are characterised by very low permeability and severely restrict fluid flow and pressure dissipation. This has created hydraulically restricted compartments with high overpressures (for example overpressures exceeding 30 MPa in the Lower Germanic Trias Group in the Terschelling Basin and Dutch Central Graben).

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Section: Pressure Distribution and Fluid Dynamics In Cenozoic North Smentioning

confidence: 98%

Pressure and fluid dynamic characterisation of the Dutch subsurface

Verweij

Simmelink

Underschultz

et al. 2012

Netherlands Journal of Geosciences

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“…This is an unusual and interesting case, because the debate can be tracked within public domain literature. The PWC variation has previously been explained by simple hydrodynamic tilting (Dennis et al 2000(Dennis et al , 2005; fault sealing (e.g. Hempton et al 2005); or a combination of similar mechanisms (e.g.…”

Section: Detection and Monitoring Of Compartmentalizationmentioning

confidence: 99%

“…Dennis et al 2000Dennis et al , 2005. Such contact variations could easily be misinterpreted as evidence for compartmentalization.…”

Section: Detection and Monitoring Of Compartmentalizationmentioning

confidence: 99%

Reservoir compartmentalization: an introduction

Jolley

Fisher

Ainsworth

2010

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Reservoir Compartmentalization -the segregation of a petroleum accumulation into a number of individual fluid/pressure compartments -occurs when flow is prevented across 'sealed' boundaries in the reservoir. These boundaries are caused by a variety of geological and fluid dynamic factors, but there are two basic types: 'static seals' that are completely sealed and capable of withholding (trapping) petroleum columns over geological time; and 'dynamic seals' that are low to very low permeability flow baffles that reduce petroleum crossflow to infinitesimally slow rates. The latter allow fluids and pressures to equilibrate across a boundary over geological time-scales, but act as seals over production time-scales, because they prevent crossflow at normal production rates -such that fluid contacts, saturations and pressures progressively segregate into 'dynamic' compartments.

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“…In contrast with "hydraulic" models HSIM does not postulate the constancy of the hydraulic head between the anticline bed and OWC-GWC. Therefore, one can expect that HSIM will predict curved interfaces closer to physical and multiphase models of Dennis et al (2000). HSIM has been widely used for demarcation of fresh and saline water zones in sea water intrusion affected coastal aquifers (Bear 1972;Strack 1989), in assessments of fully saturated areas in earth works (Cedergreen 1989), and in other mathematically similar problems (Pelce 1988).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, HAT were investigated in laboratory experiments with sand boxes filled by glass beads (Dennis et al 2000). A light immiscible phase was injected near the crest of the zigzag-shaped water conduits, which model anticlines.…”

Section: Introductionmentioning

confidence: 99%

Analytical solution to 2D problem for an anticline-diverted brine flow with a floating hydrocarbon trap

Kacimov

2007

Transp Porous Med

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Explicit rigorous solution to a steady-state J. Bear (Dynamics of Fluids in Porous Media. Elsevier, New York, 1972) problem of brine flow in an anticline homogeneous isotropic rock with a gas cap under the anticline crest is obtained by the methods of complex analysis. The stagnant hydrocarbon volume is separated from the subjacent moving brine by a sharp interface, which is a free boundary "hanging" in the formation with the loci of the anticline roof-attachment and roof-detachment points, as well as of an inflexion point, a priori unknown. Mathematically, a conformal mapping of the complex potential strip and integral representation of the Hilbert problem for the inversed complex Darcian velocity are used to obtain the physical coordinate, complex velocity and complex potential as functions of an auxiliary variable. The interfaces are plotted for various incident brine flow rates, angles of dipping anticline flanks and gas pressure. For a gas trap comparisons with the interface calculated by the Dupuit-Forchheimer approximation are carried out.

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Hydrodynamic activity and tilted oil-water contacts in the North Sea

Cited by 45 publications

References 8 publications

Pressure and fluid dynamic characterisation of the Dutch subsurface

Pressure and fluid dynamic characterisation of the Dutch subsurface

Reservoir compartmentalization: an introduction

Analytical solution to 2D problem for an anticline-diverted brine flow with a floating hydrocarbon trap

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