Results 131 to 140 of about 231 (181)
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Salt Diapirism in Southern Iran
AAPG Bulletin, 1974Abstract More than 200 piercement salt plugs are present in southern Iran and in the Persian Gulf region. Recent investigations have shown the salt, the Hormuz Series, to be largely of Precambrian (late Proterozoic) age. The diapirs are famous for their tonguelike projections, known as “salt glaciers,” and for their associated igneous,
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Diapiric salt volume offshore Louisiana
Geophysics, 1971Abstract This short note reports that approximately 25,600 cubic miles of diapiric salt exists in offshore Louisiana to a water depth of 100 fathoms (Figure 1).
T. R. LaFehr, Alan T. Herring
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AN ADAPTIVE FINITE ELEMENT METHOD FOR MODELING SALT DIAPIRISM
Mathematical Models and Methods in Applied Sciences, 2006Various types of oil traps have been found to be associated with salt domes in subsurface geology. In this paper the diapiric rise of light salt layers through a denser overburden — the surrounding rocks — is modeled assuming that, in a geological time scale, salt and rocks layers behave like Newtonian fluids. A Lagrangian approach is adopted to track
MASSIMI, PAOLO +2 more
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Petroleum Geoscience, 2019
We use a 2D forward finite-element model to explore how a laterally continuous permeable bed impacts the geological evolution and the geomechanical properties of a salt basin. We show that a permeable bed tilted by rise of a salt diapir substantially increases pore pressure in sediments near the diapir through hydraulically connecting ...
Mahdi Heidari +3 more
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We use a 2D forward finite-element model to explore how a laterally continuous permeable bed impacts the geological evolution and the geomechanical properties of a salt basin. We show that a permeable bed tilted by rise of a salt diapir substantially increases pore pressure in sediments near the diapir through hydraulically connecting ...
Mahdi Heidari +3 more
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Classification of caprock associated with salt diapirs
2018Caprock assemblages associated with salt bodies typically consist of a vertically zoned sequence in ascending order: anhydrite directly above the salt body, a transitional gypsum zone, and occasionally a complex zone of limestone and/or dolomite. Caprock forms when the upper part of a rising diapir is exposed to a crossflow of NaCl-undersaturated water,
Piper Poe +5 more
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Drilling Close to Salt Diapirs in the North Sea
SPE Offshore Europe, 1993ABSTRACT In the period May 1991 to April 1992 Ranger Oil (U.K.) Ltd., drilled five separate wells close to salt diapir structures in the Central Graben area of the North Sea. Two different salt diapirs were appraised, one in block 23/27 and the other straddling blocks 29/2a and 22/27a.
K.P. Seymour +3 more
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The geometry of drag zones adjacent to salt diapirs
Journal of the Geological Society, 2000Drag zones are highly strained regions developed adjacent to the flanks of salt diapirs, and are produced when the sedimentary overburden is folded or rotated into steeply dipping attitudes sub-parallel to the diapiric walls. This case study focuses on a diapiric province on Cape Breton Island, Nova Scotia, where five Visean-age salt ...
G. I. ALSOP +3 more
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Physical modelling of North Sea salt diapirism
Geological Society, London, Petroleum Geology Conference Series, 1993Scaled analogue models provide a powerful tool for investigating progressive deformation. By varying experimental parameters it is possible to produce a wide variety of diapir morphologies and overburden responses. This paper describes the results of one of a series of experiments which investigates the geometry of overburden sediments around
P. J. WESTON, I. DAVISON, M. W. INSLEY
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New Classification of Caprock Associated with Salt Diapirs
2018Caprock assemblages associated with salt bodies typically consist of a vertically zoned sequence in ascending order: anhydrite directly above the salt body, a transitional gypsum zone, and occasionally a complex zone of limestone and/or dolomite. Caprock forms when the upper part of a rising diapir is exposed to a crossflow of NaCl-undersaturated water,
Piper Poe +5 more
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Molding of Salt Diapirs by Stiff Overburden
1995Abstract Although active diapirs must deform the overburdens they pierce, the shape of passive (downbuilt or syn-depositional) diapirs is formed or molded by their overburdens. Molding of salt diapirs is simplified here to profiles of diapirs entirely downbuilt in effectively rigid overburden.
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