|
Hydrocarbon exploration and production
have long been a user and driver
of sophisticated numerical algorithms
and hardware. Advances in algorithms
and processing play an essential
role in finding new resource. As
production in existing fields peak,
continued progress in both exploration
and development is necessary to
provide additional resources. As
the cost of exploration and production
is high, even incremental advances
in algorithms and computational
speed can pay for themselves many
times over.
In hydrocarbon exploration advanced
computation plays an essential role
in seismic imaging, interpretation,
and modeling. Seismic imaging is
difficult in areas with extreme
lateral and vertical variations
in seismic wave velocities. An example
is sub-salt imaging, which, though
challenging has resulted in significant
discoveries in recent years. Currently,
most imaging algorithms rely on
compressional waves (P) and use
only part of the amplitude information
to resolve sub-surface variations.
The next generation of algorithms
will likely use shear (S) waves
and converted phases recorded from
a wide variety of acquisition geometries.
The ultimate goal is to use all
available information from the seismic
trace. A second area of computational
challenges lies in modeling and
interpretation of the processed
images. The goal of the interpretation
is to create a geologic model and
infer the presence of hydrocarbons.
Currently, interpretation often
requires considerable human oversight.
It may be possible to automate much
of this process with automated interpretation
and prospect generation.
Development and production of hydrocarbons
requires detailed knowledge of reservoirs
and fluid/gas content. Resolution
of geological properties is high
near existing wells but sparse elsewhere.
Statistical estimates guided by
high-resolution seismic are often
used but require multiples models
to assess possible errors. Reservoir
modeling requires tracking of a
multiple-component system (e.g.
water, oil, and gas) through a complex
media. Typically, reservoir models
use a relatively large cell size
relative to the existing geologic
knowledge due to computational bottlenecks.
Finer-grained modeling may lead
to more accurate results but will
require considerable more computational
power.
|