Impact of arid surface mega-cracks on hydrocarbon reservoir properties

Journal article
(Original article)


Publication Details

Author(s): Antrett P, Vackiner AA, Kukla P, Klitzsch N, Stollhofen H
Journal: Aapg Bulletin
Publisher: American Association of Petroleum Geologists
Publication year: 2012
Volume: 96
Pages range: 1279-1299
ISSN: 0149-1423
Language: English


Abstract


The megacrack pattern of the ephemeral north Panamint dry

lake, California,United States, is characterized by variably sized

polygons with diameters ranging from hundreds of meters to

meters. The evolution and subsurface extent of this polygonal

pattern and a probable tectonic link are examined by ground

resistivity measurements and surface mapping. Crack development

is initiated by the shrinking of clays caused by changes

in water content near the surface. For crack evolution, the

following processes are proposed: Cavities develop at approximately

1-m (∼3-ft) depth during a subsurface phase, followed

by the collapse of the overburden into the existing cavities to

form the surface cracks. Cracks are filled by wind-blown sand

and dried-out lake sediments from collapsing crack walls. Following

burial, differences in competence between crack-fill

and surrounding playa-lake sediments provide zones of structural

weakness that might channelize stress release and faulting.

Ground resistivity measurements confirmed the extent

of the cracks to a depth of more than 3 m (>9 ft). The megacrack

pattern is compared to a Rotliegende (Upper Permian)

tight gas field, located in the southern Permian Basin of

northwestern Germany, situated in a comparable geologic

setting. There, a multidirectional polygonal pattern is recorded

on horizon slices of three-dimensional seismic data

and compares well to our observations from the Panamint

Valley. The Rotliegende pattern is associated with low-offset faults, which are proposed to be responsible for subtle reservoir

compartmentalization.



FAU Authors / FAU Editors

Stollhofen, Harald Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


External institutions
Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen


How to cite

APA:
Antrett, P., Vackiner, A.A., Kukla, P., Klitzsch, N., & Stollhofen, H. (2012). Impact of arid surface mega-cracks on hydrocarbon reservoir properties. Aapg Bulletin, 96, 1279-1299. https://dx.doi.org/10.1306/11211111069

MLA:
Antrett, Philipp, et al. "Impact of arid surface mega-cracks on hydrocarbon reservoir properties." Aapg Bulletin 96 (2012): 1279-1299.

BibTeX: 

Last updated on 2018-09-08 at 16:08