• journal_title：The Leading Edge
• Contributor：Eduardo Trinchero ; Luis Vernengo ; Joaquín Cardoso
• Publisher：Society of Exploration Geophysicists
• Date：2013-04-01
• Format：text/html
• Language：en
• Identifier：10.1190/tle32040386.1
• journal_abbrev：The Leading Edge
• issn：1070-485X
• volume：32
• issue：4
• firstpage：386
• section：Attributes

Conventional seismic attributes often provide satisfactory results, especially in the characterization of conventional reservoirs such as sandstones. This is not so evident with more compact, low-permeability, and apparently uniform reservoirs, which comprise substantial reserves in amounts unthinkable a few decades ago, and whose development seemed almost impossible until very recently. Unconventional reservoirs considered in this article are located in a predominantly Jurassic-Cretaceous rifted depositional basin. The basin shifted into an early sag phase during the late Jurassic and early Cretaceous, resulting in the accumulation of a thick series of carbonates and shales. Tithonian, Berriasian and Valanginian rocks compose the segment of the geologic column under consideration. The studied sedimentary sequence is a highly prolific oil-prone source rock, with total organic carbon (TOC) up to 8 wt% and amorphous organic matter (type I/II kerogen) deposited in a euxinic paleoenvironment which generated sulfur-rich oils.