Assessing and processing threedimensional photogrammetry, sedimentology, and geophysical data to build high-fidelity reservoir models based on carbonate outcrop analogues

Ahmad Ramdani, Pankaj Khanna, Gaurav Siddharth Gairola, Sherif Hanafy, Volker Vahrenkamp

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

Abstract

A three-dimensional (3-D) outcrop depositional facies investigation of carbonate reservoir analogues requires a comprehensive integration of outcrop with "behind-the-outcrop"geophysical data. This study proposes a comprehensive methodology to assess, process, and synthesize photogrammetry, sedimentology, ground-penetrating radar (GPR), and seismic data sets based on the outcrop depositional facies framework. The methodology was tested and applied to map the 3-D morphology of the stromatoporoid-coral buildups in the Upper Jurassic Hanifa Formation reservoir analogue at Wadi Birk, Saudi Arabia. Data sets acquired include 1.2 km2 drone imageries; measured sections; 8-km-long networks of two-dimensional (2-D) GPR, three grids of 3-D GPR (60 × 50 m; 50 × 20 m; 55 × 40 m); 640-m-long 2-D seismic profile; and a 50-m-long core.We constructed a digital outcrop model (DOM) from drone imageries and calibrated it with measured sections. We measured dielectric permittivity, acoustic velocity, and bulk density to assess the geophysical properties of the target facies. We used DOM-based GPR and seismic models to assess the geophysical responses and formulate processing flows that accentuate anomalies from the stromatoporoid-coral facies.We used the proposed methodology to measure the 3-D morphology of the stromatoporoid-coral buildups quantitatively. The buildups are 3-D pseudo-ellipsoidal with an average long and short axis length of ~36 and ~11 m, respectively. The average thickness of the buildups is ~2.6 m with ~N335E orientation. We used these statistical measurements to construct an outcrop-based porosity model of the Hanifa reservoir analogue that honors the observed 3-D morphology of the stromatoporoid-coral facies.

Original languageEnglish (US)
Pages (from-to)1975-2011
Number of pages37
JournalAAPG Bulletin
Volume106
Issue number10
DOIs
StatePublished - Oct 1 2022

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Geology
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)

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