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Recent ProjectsThis is where we'll announce a few of the recent projects we have completed. This list contains some of the more 'interesting' projects with a link to a brief description about the project. If you've visited us before and want to know what's changed, take a look here first. Sometimes it takes a while for information to become "de-classified", so we are usually a year or so behind. These pictures can be freely downloaded, but they may not be used commercially unless permission is obtained from Geo-Marine Technology. Date Type Location 2004 Trinidad Surveys Trinidad 10/03 Louisiana Shelf Hazard Survey GOM 03/03 Shipwreck Survey GOM 10/00 Pipeline Burial Depth San Francisco 10/00 Pipeline decommissioning Offshore Santa Barbara, CA 10/00 Drill-site Investigations Mississippi Canyon - GOM 10/00 Lease Block Survey High Island South (Texas) - GOM 08/00 Artificial Reef Mapping Offshore Texas - Artificial Reefs
Descriptions of surveys
2004 was a very busy year for Geo-Marine Technology. The entire year
was spent on a number of projects located off the east coast of Trinidad and in
the Columbus Basin. These projects included pipeline pre-lay assessments,
anchoring surveys, seabed Louisiana Shelf Lease Block Hazard Survey This particular block is known for a seemingly random pulse of petrogenic
gases tha During a recent pipeline survey, we came across a small This project took about two weeks to complete. It consisted of
interpretation for a five-block area on the Texas-Louisiana Shelf.
Interpretation included: echosounder, magnetometer, side scan sonar, subbottom
This very interesting project involved taking subbottom profiler data
acquired using Edgetech's GeoStar
system, loading the data into Seismic Micro
Technologies Kingdom Suite seismic data analysis software, applying various
filters and transforms and measuring the depth of burial of an 8" pipeline
crossing San Francisco Bay.
Offshore Santa Barbara California This project had a two-fold in scope. A pipeline was due to be
decommissioned so its' position had to be determined and the thickness of
surficial unconsolidated sediment had to be mapped for future planned
activities. Subbottom profiler and side scan sonar data were collected
using the Geo The subbottom profiler data were examined and filtered using Seismic Micro Technologies Kingdom Suite seismic data analysis software at a workstation. This project took a little over a day to complete.
High Island South (Texas) - GOM This project was a standard lease block hazards investigation in the Gulf of
Mexico.
Offshore Texas - Artificial Reefs
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clearances for rig moves and drilling hazard evaluations. Much of the
survey data were acquired by 
t migrate up fault planes. These pulses of overpressured gases
occur at intervals of 6 to 8 months and have created numerous
drilling hazards. This study measured the shallow gas reservoir
sizes as a baseline for further investigation. Mapping was complicated by
the stacking of overpressure zones, one atop another.
shipwreck (45'
fishing trawler) in the Gulf of Mexico in about 230 feet of water. What is
extremely interesting is the level of detail produced by the 100 kilohertz side
scan sonar. This image shows the acoustic shadow of the A-Frame, the
superstructure shadow and a faint line that extends some 600 feet that is
probably an anchor cable. The ship itself is the white-colored image
and the shadow is the black region above the ship. 
profiler,
and 2-second migrated seismic data. The area is known for petrogenic gas
hazards that have troubled drillers numerous times over the years. Much of
the interpretation centered around identification and mapping of "bright
spots"; some horizontal locations had as many as five vertical levels. This figure
depicts bright spots (red) in the vicinity of a large gas plume. An
interesting correlation between gas plumes and seafloor mud volcanoes appears in the survey area, particularly where the gas plumes reached up to
near the seabed. 
This picture illustrates the final results of one of the pipeline crossings
where the top of the pipeline could be identified by the peak of the parabolic
diffraction. This system worked exceedingly well and the resolution is in
the order of inches. The timing lines are at one foot intervals in this
figure. The pipeline was crossed nearly 500 times along its length.
The pipeline was located on all but about 25 of the crossings. The data
took about 2 weeks to interpret, but almost all of this time was for software
development and procedural development. The biggest hurdle to overcome was
in converting the digitally logged 
This
project consisted of site analyses on a number of planned drill locations in
Mississippi Canyon OCS Area, Gulf of Mexico. These sites lie in adjacent
lease blocks that Geo-Marine Technology performed the initial 'Hazard Survey'
interpretation in 1999. The area is known for numerous
potential hazards such as shallow water-flow, overpressured gas accumulations,
faulting, shallow salt movement and slumping as well as possible chemosynthetic
communities. Subbottom profiler,
echosounder, and 5.0-second high resolution seismic data were analyzed in
detail. The seismic data were analyzed using Seismic Micro
Technologies 
The survey equipment
consisted of an echosounder, a side scan sonar, a magnetometer, a subbottom
profiler, and a 48-channel digital seismic system. Lease block survey
analysis is the 'bread and butter' for Geo-Marine Technology. Since 1997, we
have interpreted data from over 350 lease block in the Gulf of Mexico. The
surveys range from very shallow water lease blocks near shore to deep water
blocks near the Sigsbee Escarpment. Typical turn-around time for a
standard hazard survey interpretation is four to five days, sometimes a bit
longer depending on the
complexity of the data. Lease block hazard surveys are a requirement by
the MMS for new leases. At Geo-Marine Technology, we pride ourselves in
exceeding the requirements for reporting from the MMS (NTL 98-20). 
The