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TAPLIN
Corp.
 The geophysical experience available in TAPLIN ranges through
the full spectrum of geophysical science: acquisition, data processing,
interpretation, modeling, imaging, and a wide array of special
tools ranging from stratigraphic needs to complex structure. With oer forty five years of geophysical
experience in stratigraphic problems,
J. P. Lindsey, TAPLIN's geophysicist, has pioneered, developed,
and taught most of the reservoir stratigraphic interpretation
techniques in use today. Over 8000 geophysicists and geologists
have attended his seminars over a period of 15 years that exposed
these methods in theory and practice. He introduced the concept
of "wavelet processing", "true amplitude processing",
and the use of seismic modeling of geological regimes while employed
at three different corporations.
Services
Workstation
2D and 3D Seismic Interpretation
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data volumes from the data processor are imported into the
workstation environment and the process of identifying the
subsurface geology and ultimately prospective places to drill
are developed. This process starts with picking all obvious
faults and setting this framework in place for picking and
mapping reflection events of interest or prominence...
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Prospect
Generation
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analysis of the interpreted data for indications of hydrocarbon
accumulations employs several modern technologies. Amplitude
changes along of reflection events along interfaces often
indicate a change of the pore fill fluid. Gas is distinguished
from salt water and sometimes oil as well. This may be either
an increase or decrease in amplitude, depending on the petrophysics
of the rocks involved. |
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Geophysical
Consulting Services
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times, participants in a given exploration effort may not
be skilled in the technologies being employed. TAPLIN
acts for such partners as an adviser, attending partners meetings
and translating technological issues in more understandable
form for the clients benefit. |
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FEATURE
ARTICLE
MODELING HELPS INTERPRETATION IN AREAS WITH
SEVERE TIMING PROBLEMS
by J.P. Lindsey
excerpt reprinted by permission from Oil & Gas Journel
published Oct. 26, 1992, OGJ Special.
There are many parallels between exploring the subsurface using seismic reflections and looking at objects below the water's surface.
In the atmosphere, our vision involves only line-of-sight travel from the object to our eye. But when you look at a fish in a pond, water is added to the visual path. If the surface of the water is glassy smooth, we see the fish in its true form and shape, but its location is not where it appears. The apparent position shifts because the water's differing velocity for light propgation changes the direction of travel for that reflecting off the fish.
It gets worse. Suppose we drop a rock in our fish's pond. The surface ripples break the fish's image into pieces. If a brisk enough breeze comes up, we may even fail to recognize the object as a fish through the rough surface.
The same phenomonon is a geophysicist's dilemma. He must "look" at geologic targets (the fish) using sound (light) that travels through rocks whose velocities (refractive indices) differ. What he sees is then distorted to the extent that varying velocities obscure the sharpness of his seismic images.
The most offensive rocks are those closest to us - near the surface - just below the seismic source and receivers.
We acquire redundant seismic data and "process" several traces to get a more noise-free view of the subsurface. But this processing (addition of the redundant data) is ineffective if the reflections being added are not in time register. And that becomes the problem.
Read complete pdf of this Oil & Gas Journel, Oct. 26, 1992, OGJ Special article.
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