Modeling Oligo-Miocence channel sands (Dezful Embayment, SW Iran): an integrated facies classification workflow

Autor:	Iradj Maddahi, Mehran Moradpour, Mostafa Heydari, Sajjad Esmaeilpour
Rok vydání:	2014
Předmět:	geography geography.geographical_feature_category Lithology Petrophysics Anticline Geology Management Monitoring Policy and Law Petroleum reservoir Industrial and Manufacturing Engineering Sedimentary depositional environment Geophysics Ridge Facies Petrology Geomorphology Communication channel
Zdroj:	Journal of Geophysics and Engineering. 11:045003
ISSN:	1742-2140 1742-2132
DOI:	10.1088/1742-2132/11/4/045003
Popis:	This study has been conducted on Mansuri onshore oilfield located in Dezful Embayment, south-west Iran. One of the hydrocarbon-bearing formations is a Oligo-Miocene Asmari formation?the most prolific Iranian reservoir rock. Like many other oilfields in the area, the trap in this field is deemed structural (anticline), formed during the collision of the Arabian plate with the Iranian plate and the folding of Neotethys deposits with a NW?SE trend. This study integrates three different quantitative studies from geology, geophysics and petrophysics disciplines to quantitate ?the qualitative study of seismic facies analysis based on trace shapes?and 3D multi-attribute clustering?. First, stratigraphic sequences and seismic detectable facies were derived at one well location using the available high resolution core facies analysis and depositional environment assessment reports. Paleo and petrophysical logs from other wells were subsequently used for the extrapolation of stratigraphic sequences interpreted at the first well. Utilizing lithology discrimination obtained by wire-line log interpretation, facies were extrapolated to all wells in the area. Seismic 3D attribute analysis and seismic facies classification established a 3D facies volume accordingly, which was finally calibrated to geological facies at well locations. The ultimate extracted facies-guided geobody shows that good reservoir-quality channel sands have accumulated with NW/SE elongation at the ridge of the structure. As a result, this type of geometry has created a stratigraphic/structural hydrocarbon trap in this oilfield. Moreover, seismic facies analysis shows that buried channels do not parallel the predominant Arabian plate-originated channels (with SW?NE trends) in SW Zagros and are locally swerved in this area.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d4b77148a1b8a276739deef09f80315c https://doi.org/10.1088/1742-2132/11/4/045003 Zobrazit plný text záznamu