New Tools and Approaches in Reservoir Quality Prediction

By: Dave Cantrell



Instructor

Dr Dave L. Cantrell
(Cantrell GeoLogic and Stanford University, USA)

Duration

30-31 January 2023:
9:00AM - 1:00PM CET
4 hours/day

Disciplines

Geology - Carbonate Geology

Level

Foundation

Language

English

EurGeol

4 CPD points



Keywords

CARBONATES CASE STUDY DIAGENESIS INTEGRATION INTERPRETATION LITHOLOGY PERMEABILITY RESERVOIR CHARACTERIZATION SEQUENCE STRATIGRAPHY THIN SECTION


Course Format

The EAGE Interactive Online Short Courses bring carefully selected courses of experienced instructors from industry and academia online to give participants the possibility to follow the latest education in geoscience and engineering remotely. The courses are designed to be easily digested over the course of two or three days. Participants will have the possibility to interact live with the instructor and ask questions.

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Course Description

Diagenesis includes all chemical, physical and biological changes, modifications or transformations undergone by a sediment after its deposition and during and after its lithification (AGI Glossary of Geology), exclusive of metamorphism. Carbonate rocks and sediments are especially susceptible to post-depositional modifications because of the high chemical reactivity of carbonate minerals; these carbonate minerals react quickly with natural waters in order to bring the water into equilibrium with the host carbonate sediments and rocks (Moore 1989). These rock-water interactions can have a dramatic effect on the original (depositional) reservoir quality framework of a sediment, and can either create, modify, or completely destroy reservoir quality. Given that these alterations can occur at any time during the history of the sediment, understanding and predicting carbonate diagenesis and its impact on reservoir quality can be a very challenging - and at times frustrating! - process. While the full gamut of carbonate diagenetic processes is extensive, a simplified list of the most commonly encountered processes includes: cementation, dissolution, dolomitization, compaction (including pressure solution and stylolitization), fracturing, and the in situ growth of other minerals in the sediment. These processes can be considered within a context of diagenetic environments, including the marine environment, the mixing zone, the meteoric environment, and the burial environment. A consideration of the typical conditions, processes and products for each of these diagenetic environments provides a method for both understanding and predicting carbonate diagenesis. The relationship between reservoir quality and diagenesis is complex and variable, and at times the various diagenetic processes work in complementary and overlapping ways. For example, movement of undersaturated water through a sediment may partially dissolve the sediment to create or enhance porosity; as dissolution continues, however, waters may become saturated to the point where they cement porosity in adjacent sediments, to produce a tightly cemented carbonate rock with abundant moldic porosity but little permeability. Likewise dolomitization may occlude, redistribute, create or enhance porosity, based on a number of different factors. This workshop provides an in-depth overview of the nature and extent of common diagenetic alterations in carbonates and their impact on reservoir quality; it then uses a series of case studies to illustrate how the principles described in this workshop can be applied to understand and predict reservoir quality in several outcrop and subsurface examples.



Course Objectives

Upon completion of the course, participants will be able to:

identify common diagenetic products in carbonate rocks and sediments 

• understand the processes that gave rise to these products 

• predict the likely location and effect of diagenesis in the subsurface 

• appreciate the role that diagenesis plays in producing final reservoir quality



Course Outline

The following steps in seismic data processing will be discussed:

Introduction 

Diagenesis in Carbonate Rocks and Sediments – what is it, and why should you care? 

Aspects of Diagenesis: Recognition of Processes and Products 

• Cementation 

• Dissolution 

• Dolomitization 

• Compaction and Pressure Solution 

• Fracturing and Others 

Organizing Principles 

Diagenesis in Time and Space - the Importance of Diagenetic Environments 

Implications for Reservoir Quality 

Case History #1: Dolomitization in Middle Eastern Carbonate Rocks 

Case History #2: Introduction to Karst Systems and Reservoirs 

Case History #3: An Introduction to Microporosity in Middle Eastern 

Carbonate Rocks 

Conclusions



Participants' Profile

The course is designed for geoscientists and engineers looking to enhance their understanding of and ability to predict carbonate diagenesis.



Prerequisites

Some knowledge of carbonates and the main challenges of reservoir quality prediction and modeling in carbonates would be helpful.



About the Instructor

Dave L. Cantrell

Dave L. Cantrell has over 35 years of worldwide geologic industrial and academic experience. He graduated from the University of Tennessee with an MSc in Geology in 1982, and from the University of Manchester with a PhD in Geology in 2004. Dave began his industry career in 1982 with Exxon where he conducted numerous reservoir characterization and geological modeling studies on reservoirs in the Middle East; the Permian, Powder River, Williston, and Gulf of Mexico Basins of the USA; and the Maracaibo and Barinas Basins of Venezuela; among others. After moving to Saudi Arabia in 1997, he conducted studies on several large carbonate fields there, and lead geologic R&D for Saudi Aramco from 2000- 2008; he also served as a professor and Associate Director for the College of Petroleum Engineering & Geosciences at King Fahd Petroleum & Minerals (KFUPM) from 2015-2017. He is an AAPG Certified Petroleum Geologist, a Fellow of the Geological Society of London, and an adjunct professor at Stanford University; he has published over 40 articles in peer-reviewed journals, and holds one patent.





EAGE supports its members and the Geoscience community in general by offering a 35% discount on the regular prices for our Interactive online short courses during these difficult times.

Registration Fees

Registered and Paid Until 8 January  2024 From 25 January 2024
Education Package1 Credit1 Credit
EAGE Member Price € 145 € 195
Non-Member Price € 240 € 290
*Non-Member price for this product does include EAGE Membership




Cancellation and Changes Policy

Registration fees will be refunded as follows:
  • Cancellation received before 10 March 2023: Refund will be processed after the event had ended. Amount will minus an administration fee of € 35 per person.
  • Cancellation received on or after 10 March 2023: No refund will be made. 
  • Transferring of your registration to another participant will cost  € 35, as administration fee, plus any differences in delegate types, where applicable (for instance when changing a registration from a member to a non-member). 
  • For an overview of all EAGE Registration Terms and Conditions please click here to download.