Petrel fracture modeling

Create geologically consistent fracture models

Overview

Petrel™ fracture modeling provides full flexibility for both stochastic and geomechanical fracture characterization using either stochastic or deterministic methods. Fractures can be modeled as either discrete or implicit fractures or as a combination of both. Additionally, a geomechanics-based method models the perturbed stress field directly linked to the active faults, under applied tectonic stresses. The tectonic stresses through geological time can be obtained from an inversion using the fracture data and the fault model or, alternatively, can be imposed directly. This makes it possible to extract geometrical characteristics of potential natural fractures developed inside the perturbed stress field. Calibration is applied with observed fractures along wells to provide a calibrated computed density of the fractures.

Model naturally fractured reservoirs using a hybrid technique combining discrete and implicit fractures.

Visualize observed fracture data as tadpoles and rose diagrams together with other logs and calculate fracture intensity curves.

Use neural networks to combine different fracture drivers. This general trend property then guides the distribution of fractures.

Leverage the Petrel tools to perform a full fracture modeling workflow in an integrated environment.

Tectonic stress domain window for simulation result and comparison to input data and computed fractures.

Computed fracture density property and corresponding geomechanically driven fracture network.

Typical workflow for geomechanically based driver.

Applications

Computed fracture density property
Create grids with strike directions
Calculate fracture intensity curves

Benefits

Fracture models can be distributed and upscaled to 3D grids for simulation where advanced permeability upscaling options are available, including Oda and flow-based methods. The Petrel fracture modeling workflow enables full integration with the Eclipse industry-reference reservoir simulator and Intersect high-resolution reservoir simulator using multiple porosity models for advanced simulation of naturally fractured reservoirs.

$Petrel fracture modeling$

Grid with strike direction of potential fracture (red) and the associated fracture network (blue).

Features

Import, QC, and display fracture interpretations using the well section and stereonet windows
Use dip and azimuth interpretation from image log data, together with fault patches from ant tracking and other discrete fracture networks
Characterize fractures using either stochastic or deterministic methods
Represent fractures as either discrete planes or implicit properties or as a combination of both
Calibrate the interpretation to observed fracture data
Upscale the fracture network directly into the geocellular model
Upscale permeability based on the Oda method

Training