Original scientific paper

Computerized Tomography Reveals Aptian Rudist Species and Taphonomy

G.W Hughes
S. Siddiqui
R.K. Sadler

Abstract

Computerized tomographic (CT) scans of cored carbonates from the Lower Aptian Shu’aiba Formation reveal clearly defined rudist profiles. Formation MicroImager (FMI) logs from the equivalent cored wellbore also display images related to the rudist content. Various rudist species can be identified in the cores and provide a key to the identification of the CT and FMI rudist images. As certain rudist species preferentially occupied different environments during the Early Aptian deposition of the Shu’aiba Formation carbonates, their recognition in the cores, CT and FMI images can be used to assist determination of palaeoenvironments, lithofacies and reservoir facies. This new ability to identify rudist images in FMI logs in uncored development wells can be used to extend depositional facies models into uncored parts of the hydrocarbon reservoir models.

Keywords

Computerised tomography (CT); Formation MicroImager (FMI); Rudists; Lower Aptian; Shu’aiba; Shaybah; Saudi Arabia

Hrčak ID:

3686

URI

https://hrcak.srce.hr/3686

Publication date:

30.6.2004.

Visits: 2.077 *