RMBAKER LLC employs industry standard geophysical methodologies as part of comprehensive subsurface testing and investigation studies. In October 2008 we began construction of a state-of-the-art borehole geophysical and well logging trailer. The start of borehole geophysical services is anticipated for February 2009. We specialize in the identification and characterization of sinkholes and sinkhole forming processes in Florida, however our state-of-the-art geophysical and data presentation capabilities can be extended to a variety of other applications. Feel free to contact Rob Baker at RMBAKER LLC to discuss your project needs, with no obligation. Our geophysical work products are integrated with advanced GPS and GIS techniques, for a world class field survey and map product. We also provide technical support for global mineral exploration programs and local mining operations. We provide a comprehensive research program to evaluate mineral, oil, and gas resources within a geographic information system. Our reports are informative but concise, with high quality CAD and graphics images to aid with the visualization of site characteristics. Our products are available in GIS friendly formats, depending on your specific project needs. |
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Borehole Geophysics - Well Logging (coming in Feb 2009)
- State-of-the-art well logging tools and hydraulic draw-works mounted within a 16 foot custom trailer
- Logging depth range of 0 to 4500 feet; well diameters from 4 inches to 58 inches
- Complete suite of geophysical logging tools from Robertson Geologging Ltd
- Video logging tools from Aries CCV Engineering; video to 4500 feet; VHS tape or DVD products
- Field printed logs in 600dpi grayscale using a Printrex 843 DL/G thermal printer
- Logs provided in PDF and LAS (WellCAD) format
- GPS positioning of well with sub-meter accuracy
Our services are offered 7 days a week, 24 hours a day, and on short notice!
We offer straightforward pricing with no surprises after the work is done-
Contact us for a verbal price quotation or formal bid.
Tools and logs available all the time:
- Normal 8/16/32/64" resistivities
- SP, SPR and natural gamma
- Dual induction (20" & 32" spacings) w/ natural gamma
- Fluid temperature w/ gradient and differential
- Fluid conductivity and gradient
- Caliper (3-arm, 4" to 58" well diameters)
- Full-waveform borehole compensated acoustic w/ VDL
- Cement bond log w/ VDL
- Acoustic televiewer-sonic reflection imaging
- Dual-view video inspection camera (4"+ well diameters)
- Impeller flowmeter
- Gas/fluid sampler (sealed chamber)
Tools and logs available for special projects:
- Optical televiewer (air filled or clear fluid boreholes)
- Water quality (fluid conductivity, dissolved oxygen, pH, redox potential, nitrates)
- Caliper (3-arm, smaller 3" borehole diameters)
- Guard Log (focused electric)
- Spectral gamma
- Magnetic susceptibility
- Induced polarization
- Gyroscopic verticality
- Lateral resistivity
- Microgravity
Ground Penetrating Radar (GPR)
- In-house: Mala Geosciences Ramac X3M radar system with 250 MHz and 500 MHz antennas
- Capability to rent: 100 MHz and 800 MHz antennas
- Rugged cart for rough terrain surveys on foot or towed by a 4-wheel ATV
- Sub-meter GPS positioning in real time during survey work
- GPR and GPS data integrated in a geographic information system (GIS) map product
Our forensic investigations are smaller scale studies performed at residential properties and small commercial sites. Field maps are hand drawn and rectified to a grid painted on the ground surface.
Larger property investigations and pre-development studies are normally performed by towing the GPR antenna behind a 4-whell ATV. A high resolution GPS antenna is mounted to the GPR cart for sub-meter accuracy in locating the transects. We collect GPS and GPR data simultanously, and then after corrections to the GPS data use a proprietary algorithm to merge the two datasets.
RMBAKER LLC GPR and GPS data manipulation routines enable extremely accurate mapping and modeling of geological and cultural features noted by the geophysical testing.
Electrical Resistivity Imaging (ERI)
- Iris Instruments, Inc. Syscal Kid Switch 24, or Syscal Pro Switch 96 (rented)
- Kid 24 electrode system with a maximum spacing of 5 meters (approx. 16 feet)
- Pro 96 electrode system with a maximum spacing of 5 meters (approx. 16 feet)
- Effective geoelectrical profiling to depths of 65 feet (Kid) or 200 feet (Pro)
- ERI and GPS data integrated in a geographic information system (GIS) map product
- 3D rendering of ERI bitmap images
The ERI image below shows a thin veneer of sands atop a thick sequence of limestone. The limestone was both soft/weathered and hard/competent, with confirmed deep vertical fracture systems.
2D ERI images can be mapped as earth slices in a 3D environment. In this case the ERI study investigated the continuity of a clayey confining unit shown by the "cooler" blue colors.
Geological Hazards Mapping
- Common geological and man-made hazards in Florida are: sinkholes, shrink-swell clays, peat and organic soils, naturally buried debris, construction debris, etc.
- We employ a combination of GIS datasets, visual reconnaisance and geophysical testing to identify and map geological hazards
- In-house geophysical methods include GPR, ERI and borehole geophysics (coming soon!); we can perform a wide range of tests using rented equipment, such as microgravity, electromagnetics, capacitively-coupled resistivity, etc.
- Soil borings and laboratory testing are an important part of suspected hazard identification and confirmation
- Geological hazards mapping is presented in a geographic information system (GIS) map product
Sinkhole Risk Assessments
- -under construction-
Report Reviews
- RMBAKER LLC offers second opinions of forensic study of sinkholes for insurance investigations.
- -under construction-
Consulting
- -under construction-