Oil & Gas Training
and Competency Development

Discipline Reservoir Engineering
LevelAdvanced
Duration5 Days
Delivery Mechanism Classroom
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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) and numerical well testing to confirm reservoir behavior and to reduce uncertainty.

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.

  • Agenda
  • Topics
  • Audience
  • Prerequisites
  • Agenda

    Day 1

    Module 1 Fundamentals of Naturally Fractured Reservoirs
    Lesson 1: Introduction to naturally fractured reservoirs
    Lesson 2: Definitions and classification of fractures and fractured reservoirs
    Lesson 3: Fracture properties
    Lesson 4: Characterization of fractured reservoirs

    Module 2 Fractured reservoir modelling
    Lesson 1: Overview of fractured reservoir modelling
    Exercise 1: use Petrel to analyse and model fractures
    Lesson 2: Fracture network generation
    Exercise 2: Generate a fracture network
    Lesson 3: Discrete fracture network upscaling
    Exercise 3: Upscale and calibrate DFNs

    Day 2

    Module 3: Well Testing in Naturally Fractured Reservoirs
    Lesson 1: Pressure response in non-fractured reservoirs
    Exercise 1: Standard well test interpretation to evaluate absolute permeability
    Lesson 2: Pressure response in Wells connected to a conductive fault / hydraulic fractures
    Exercise 2: Comparison of pressure response in radial and linear flow
    Lesson 3: The Warren and Root’s model for Flow in fractured reservoirs
    Lesson 4: Flow regimes and the diagnostic plot
    Exercise 3: fractured reservoir evaluation by well testing

    Module 4: Numerical simulation of flow in fractured reservoirs
    Lesson 1: Types of numerical simulation models for fractured media
    Lesson 2: Flow equations for single porosity models
    Lesson 3: Flow equations for dual porosity models
    Lesson 4: Dual porosity implementation in ECLIPSE
    Lesson 5: Facilities to model partially fractured reservoirs

    Exercise 1: Convert a single porosity case to dual porosity
    Lesson 6: Petrel RE interface to define DP / DPDP simulation cases
    Exercise 2: Compare pressure response in explicit fracture models
    Exercise 3: Compare pressure response in explicit fracture vs an equivalent dual porosity model

    Day 3

    Module 5: Recovery mechanisms in fractured reservoirs
    Lesson 1: Expansion
    Lesson 2: Viscous displacement
    Lesson 3: Spontaneous imbibition
    Lesson 4: Gravity drainage / imbibition
    Lesson 5: Molecular diffusion
    Lesson 6: Relevant ECLIPSE keywords
    Exercise 1: Viscous displacement sensitivity study
    Exercise 2: Compare spontaneous imbibition in explicit fractures and dual porosity models
    Exercise 3: Compare gas gravity drainage models
    Activate diffusion in a compositional dual porosity model

    Day 4

    Module 6: Advanced options for naturally fractured reservoir simulation
    Lesson 1: Integrated capillary pressure option
    Exercise 1: Activate the integrated capillary pressure option
    Lesson 2: Multi-porosity option
    Procedure 1: Activate the multi-porosity option in ECLIPSE 100
    Procedure 2: Activate the multi-porosity option in ECLIPSE 300
    Exercise 2: Activate the multi-porosity option for cases in Petrel.

    Lesson 3: Triple porosity
    Lesson 4: The conductive faults model in ECLIPSE 300
    Exercise 3: Define conductive faults in Petrel

    Day 5

    Module 7: Calibration and history matching of fractured reservoir models
    Lesson 1: Dynamic calibration of fracture data
    Procedure 1: Define a workflow in Petrel to report KH for all specified wells
    Procedure 2: import observed PLT data in Petrel
    Lesson 2: History matching with preserved geological consistency
    Exercise 1: Run a computer assisted history matching of a dual porosity case
    Exercise 2: Determine the influence of geological priors

    Module 8: Unconventional reservoirs
    Lesson 1: Coal Bed Methane reservoir models
    Exercise 1: Run simulation models for primary and enhanced CBM recovery using Petrel RE
    Exercise 2: Gas desorption and diffusion processes with instant and time-dependent sorption options
    Exercise 3: use the Palmer-Mansoori rock compaction model
    Lesson 2: Shale gas
    Exercise 4: Export a simulation case with multiple porosity for shale gas
    Exercise 5: Experiment with heterogeneous rock adsorption properties
    Lesson 3: Hydraulic fractures
    Exercise 6: Represent hydraulic fractures on Tartan grids
    Exercise 7: create hydraulic fractures using LGR

  • Topics

    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

  • Audience

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

  • Prerequisites

    Experience with ECLIPSE single porosity simulations

  • Prerequisites

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