@misc{10481/78490,
year = {2022},
month = {11},
url = {https://hdl.handle.net/10481/78490},
abstract = {Bioturbation can influence petrophysical properties (e.g., porosity, permeability)
of sedimentary rocks and, in consequence, reservoir quality. The impact can be
positive, negative, or neutral, requiring detailed ichnological analysis.
Ophiomorpha, a branched cylindrical burrow with diagnostic peloidal wall,
may be present in bioturbated reservoirs that exhibit properties of both superpermeability
and reduced porosity/permeability. However, no mechanistic
understanding of how Ophiomorpha positively or negatively impacts
petrophysical properties has yet been established. This study presents highresolution
X-ray microtomographic analysis of how the features of
Ophiomorpha (i.e., peloidal wall vs. burrow fill) influence porosity distribution
in deep-water deposits (Neogene Tabernas Basin, SE Spain). The results show
that the peloidal burrow wall exhibits the lowest porosity (up to six orders of
magnitude lower than burrow fill or host sediment), while surrounding sediment
shows variable values. Abrupt porosity changes within the fill material likely
relate to burrow-associated diagenesis. A refined understanding of the features
of Ophiomorpha and their associated porosity distribution help to constrain
understanding of their diverse impacts on reservoir properties.},
organization = {MCIN/AEI	PID 2019-104625RB100},
organization = {FEDER/Junta de Andalucia-Consejeria de Economia y Conocimiento/Projects	P18RT-4074	
B-RNM-072-UGR18	
A-RNM-368-UGR20	
PPJIA2021-07},
organization = {Junta de Andalucia	RNM-178},
organization = {Universidad de Granada	UCE-2016-05	
University of Granada},
organization = {Humboldt Postdoctoral Fellowship},
organization = {Ministry of Science and Innovation, Spain (MICINN)	IJC 2019038866-I},
publisher = {Frontiers},
keywords = {Bioturbation},
keywords = {Petrophysical properties},
keywords = {Micro-CT},
keywords = {Reservoir quality},
keywords = {Diagenesis},
title = {The puzzling influence of Ophiomorpha (trace fossil) on reservoir porosity: X-ray microtomography analysis},
doi = {10.3389/feart.2022.1010729},
author = {Míguez Salas, Olmo and Cabrera Ortiz, José and Dorador Rodríguez, Javier and Rodríguez Tovar, Francisco J.},
}