Carbonate Reservoirs and Carbonate Sequence Stratigraphy


High Level Agenda



ï‚· Terrigenous clastic and carbonate systems



ï‚· The importance of organisms in carbonate systems



ï‚· What controls carbonate production and sedimentation



ï‚· The effect of water depth and sedimentation



ï‚· Variations in carbonate production and accretionary systems



ï‚· Carbonate deposition in both cool and warm areas



ï‚· Carbonate production rate variation within platforms



ï‚· The carbonate platform response to sea level rise



ï‚· Carbonate sequence stratigraphy



ï‚· The drowning of carbonate platforms



ï‚· Highstand shedding and re-deposition



ï‚· Carbonate depositional environments



ï‚· Pelagic carbonate deposition



ï‚· Basin margin carbonate deposition



ï‚· Reef and fore-reef slope carbonate deposition



ï‚· Bank margin carbonate deposition



ï‚· Shelf and middle shelf carbonate deposition



ï‚· Beach and tidal flat carbonate deposition



ï‚· Eolian carbonate deposition sub-aerial exposure and secondary process deposition



ï‚· Lacustrine carbonate deposition



ï‚· Carbonate petrography and diagenesis



ï‚· Depositional models for the Natih, Shuaiba and Buah carbonates of Oman and the UAE.




What are the Goals?



ï‚· Understand what are the different types of carbonate hydrocarbon reservoir and the different



palaeoenvironments in which they are deposited



ï‚· Be able to integrate sedimentary core, sidewall core and log data for carbonate facies



ï‚· Be able to recognize and interpret the petrography of the main carbonate reservoir types



ï‚· Be able to identify the main sequences on seismic



ï‚· Be able to integrate other geological data and then identify sequences and parasequences on



well logs



ï‚· Be conversant with the terms and definitions used in carbonate sequence and seismic



stratigraphy



ï‚· Be able to use sequence and seismic stratigraphytowards new play definition and as an aid in



play and prospect risking



ï‚· Understand the processes that control carbonate deposition



ï‚· Understand what controls porosity and therefore reservoir development in carbonate rocks



ï‚· Be able to conceptualize geological models for the deposition of the Natih, Shuaiba and Buah



hydrocarbon reservoirs



ï‚· Be able to understand the complex controls on the deposition of carbonate rocks and both



primary and secondary depositional environments




Module Outline



Module 1: An Introduction to Carbonate Reservoirs



ï‚· Terrigenous clastic versus carbonate systems



ï‚· Organisms that form carbonate reservoirs and their geological history



ï‚· Calcareous microfossils their presence in carbonates and use for age dating



ï‚· The different types of carbonates and the different types of carbonate rocks



ï‚· Electric log characteristics of carbonate rocks



ï‚· Stratigraphic Terminologies.



Lithostratigraphy – short duration physical event-range zones-surface well correlationsubsurface well correlation.



ï‚· Well correlation



Well correlation-How to correlate well logs- Lithostratigraphic correlation-chronostratigraphic



correlation-.




Module 2: Component and Classification of Carbonate Rocks



ï‚· Sedimentary Rocks.



ï‚· Carbonate Origin.



ï‚· Carbonate Rock Constituent.



ï‚· Classification of Carbonate Rocks



ï‚· Carbonate Diagensis



Cementation-Microbial Micritization-Neomorphism-Dissolution-Compaction



ï‚· Carbonate Porosity.



ï‚· Worldwide Carbonate Environments.



Areas of Modern Carbonate Production-Basins (Sedimentary-Hydrocarbon)-Marine



Sedimentation- Carbonate Shelves-Biogenic deposits-Silica productivitycarbonate productivity.




Module 3: Carbonate Depositional Environments



ï‚· Classification of Depositional Environments.



ï‚· Continental Margins Sedimentation.



ï‚· Carbonate Depositional Setting.



ï‚· Reef and fore-reef slope carbonate deposition



ï‚· Basins and Slope.



Pelagic Sediments- Turbidite and Debris flow.



ï‚· Platform Interior



Epeiric sea- lagoon or bay- tidal flats.



ï‚· Terrestrial.



ï‚· Platform Margin.



Reefs and organic buildups-Sand shoals.




Module 4: The Main Controls on Carbonate Deposition



ï‚· The importance of organisms in carbonate systems



ï‚· What controls carbonate production and sedimentation



ï‚· The effect of water depth and sedimentation



ï‚· Variations in carbonate production and accretionary systems



ï‚· Carbonate deposition in both cool and warm areas



ï‚· Carbonate production rate variation within platforms



ï‚· The carbonate platform response to sea level rise




Module 5: Types of Carbonate Platforms.



ï‚· Carbonate Ramps.



ï‚· Rimmed Carbonate Shelves.



ï‚· Non-Rimmed Carbonate Shelves.




Module 6: Carbonate Sequence Stratigraphy



ï‚· History of Sequence Stratigraphy.



ï‚· Sequence Stratigraphy Definitions.



ï‚· Basin Forming Processes



ï‚· Order of Cyclicity.



ï‚· Parasequence Sets



ï‚· Systems Tracts



ï‚· Controls in Carbonate Sedimentation.



ï‚· Organic and Inorganic Carbonate Production.



ï‚· Highstand Sheeding



ï‚· Carbonate Platform Drowning.



ï‚· Carbonate Plate Form Exposure.



ï‚· Carbonate Slope, Platform Classification.



ï‚· Sequence Stratigraphiy Models for CarbonatePlatform.



Ramps



Rimmed Shelves.



Escapment Margins.



Isolated Platforms.




Module 7: Carbonate Platforms Examples and Exercises