A step change in modeling
Paradigm SKUA™ (Subsurface Knowledge Unified Approach) is a pure 3D method which
unifies all subsurface discrete models. SKUA embeds a native full 3D
description of the volume. The immediate advantage is that the need for
pillars disappears. Horizons and grids geometry are constructed
simultaneously in the 3D space using a technology call the "UVT
Transform™" based on the observation that horizons represent
geochronological surfaces. Working with a paleo-geographically 'correct'
mesh, geobodies, reservoir properties and other attributes can be correctly
modeled in their depositional state.
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SKUA geological grid showing modeling
of thin beds inside a flower structure
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Because of the underlying "UVT Transform" technology, SKUA is a step
change improvement in modeling. Many benchmarks have shown that SKUA
reduces modeling time by large amount of times.
Below is a table comparing pillar-based modeling time and SKUA modeling
time:
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Geological setting
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Pillar modeling time
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SKUA modeling time
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Compressive environment
Reverse faults
Large displacements
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3 days
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2 hours
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Extensive environment
51 faults
3 thin beds and 12 horizons
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Model is 4 models
2 months
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3 hours
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Highly compressive thrust
30 faults
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2 Weeks
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2 hours
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Better reservoir models
The construction of geological models that honor structural and
stratigraphic complexities lead to the construction of better reservoir
models, which enable better history matching, and enable better production
forecasts.
Requirements for flow simulators and geological modeling grids are
different and SKUA creates two types of grids which is not the case for
most modeling applications. Flow simulation grids created in SKUA are
corner point grids which can have faults represented as pillars or as stair
steps across mostly vertical pillars. The choice is left to the reservoir
engineer which technique will be used.
The Upscaling and LGR Module part of the SKUA suite will
allow up-scaling of a geological grid, created in the Structure and
Stratigraphy Module and populated with geological properties
(porosity, net-to-gross, etc.) using the Reservoir Properties
Module, in a flow simulation grid created in the Flow
Simulation Grid Module.