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Oil & Gas Training
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ECLIPSE Simulation of Naturally Fractured Reservoirs

This course is designed for reservoir engineers involved in the evaluation and management of naturally fractured reservoirs (NFRs). In particular, it is intended for reservoir engineers who perform activities related to understanding NFR behavior and who use numerical simulation models for history matching and prediction.

The course encourages a collaborative approach to NFR modeling using various subsurface disciplines and applications. The course covers basic and advanced numerical simulation aspects including fracture modeling concepts. It also promotes an understanding of the activities that precede building a numerical model, such as, generating and upscaling a discrete fracture network (DFN).

You build a fractured reservoir model from scratch in Petrel. This exercise will help you to better understand the role that petrophysics, structural geology, and geomechanics concepts play in creating the dynamic simulation model that you will be using.

Several methods exist for modeling NFR dynamic behavior. The method used depends on the objective of the numerical simulation. The dual porosity concept is commonly used in hydrology and the oil and gas industry to represent flow in fractured media. In this course, you learn about the background, concepts, and assumptions of the dual porosity model. In the exercises, you run numerical well test cases and compare the results against dual porosity and equivalent single porosity models.

The NFR recovery mechanisms are discussed mainly in the context of the dual porosity model. In addition, you learn about advanced modeling options including the extension to multi-porosity models. Following this section is a discussion on dynamic calibration and history matching applications in NFRs. The course concludes with a discussion and exercises on applying dual porosity extensions to model coal bed methane (CBM) and shale gas reservoirs.

Day 1

Fundamentals of Naturally Fractured Reservoirs

  • Introduction to naturally fractured reservoirs
  • Definitions and classification of fractures and fractured reservoirs
  • Fracture properties
  • Characterization of fractured reservoirs

This module is an introduction, with definitions that are related to naturally fractured reservoirs. It is not intended to cover the full theory of naturally fractured reservoirs. This module equips you with the basic information and terminologies used in the in the training.

Fractured reservoir modelling

  • Overview of fractured reservoir modelling
  • Fracture network generation
  • Discrete fracture network upscaling
  • Fracture model calibration

This module is an introduction to fracture modeling for reservoir engineers. The principles of fracture modeling encourage a multi-disciplinary collaborative approach when you model and simulate fractured reservoirs.

Day 2

Numerical simulation of flow in fractured reservoirs

  • Types of numerical simulation models for fractured media
  • Flow equations for single porosity models
  • Flow equations for dual porosity models
  • Dual porosity implementation in ECLIPSE
  • Facilities to model partially fractured reservoirs
  • Petrel RE interface to define DP / DPDP simulation cases

This module discusses the theory behind numerical simulation models that you use to predict flow in fractured reservoirs. There are several numerical simulation approaches available, based on your modeling objectives and the type of fractured reservoir.

Day 3

Recovery mechanisms in fractured reservoirs

  • Expansion
  • Viscous displacement
  • Spontaneous imbibition
  • Gravity drainage / imbibition
  • Molecular diffusion
  • Relevant ECLIPSE keywords

This module shows you how to extend single-phase flow equations to multi-phase flow. You will learn about capillary, gravity, and viscous-driven flow in fractured reservoirs. You will develop an understanding of why the interactions between fractures and rock during gas or water injection is critical when you estimate recoveries. You also learn about common recovery mechanisms in fractured reservoirs, such as expansion, viscous displacement, spontaneous imbibition, gas gravity drainage, and diffusion.

Day 4

Advanced options for naturally fractured reservoir simulation

  • Integrated capillary pressure option
  • Multi-porosity option
  • Triple porosity
  • The conductive faults model in ECLIPSE 300

This module presents some advanced options that help you improve accuracy and flexibility when you model naturally fractured reservoirs.

Day 5

Calibration and history matching of fractured reservoir models

  • Dynamic calibration of fracture data
  • History matching with preserved geological consistency
  • Examples of cross-correlations of fracture properties

This module reviews the calibration steps necessary to match production logging and well testing results. It discusses the general history matching problem of naturally fractured reservoirs and presents a collaborative approach to obtain consistent history matching models.

Unconventional reservoirs

  • Coal Bed Methane reservoir models
  • Shale gas
  • Hydraulic fractures

This module presents some advanced options that help you improve accuracy and flexibility when you model naturally fractured reservoirs.

Learning activity mix

Reservoir engineers with experience in ECLIPSE who are interested in learning numerical simulation of fractured reservoirs using ECLIPSE simulators

Fundamentals of Naturally Fractured Reservoirs

Fractured reservoir modelling

Numerical simulation of flow in fractured reservoirs

Well Testing in Naturally Fractured Reservoirs 

Recovery mechanisms in fractured reservoirs

Advanced options for naturally fractured reservoir simulation

Calibration and history matching of fractured reservoir models

Unconventional reservoirs

Experience with ECLIPSE single porosity simulations

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