Texoma Exploration

SEISMOELECTRIC EXPLORATION 

  To compliment traditional P-wave seismic reflection imaging or used as a stand-alone tool, seismoelectric (SE) responses are used as a hydrocarbon indicator for detection of electrically resistive fluids (freshwater, oil & gas) up to approximately 6000 ft. Using a pair of electrodes and a small explosive charge, SE techniques measures the voltage drop as the P-waves passes through the different interfaces.  The electrically resistive zones are logged in the field, allowing for near real time analysis of each shot.  SE can be used as a standalone hydrocarbon indicator, or be used in conjunction with more traditional seismic data, increasing the odds of finding and developing a productive well.  Another advantage of SE is small footprint required to collect data.  This makes it ideal for smaller leases that do not have enough acreage to perform seismic reflection surveys.        

HOW IT WORKS 

  When the body wave generated by the shotgun blast moves through electrical resistive fluids, the fluid moves relative to the rock formation.  Ions in the electrical resistive fluid are dragged away from their partners bound to the rock and the generated electrical disturbance travels to the surface near the speed of light and is detected by two antenna arrays setup at the surface.  A much reduced electrical field is generated in electrical conductive fluid (i.e. salt water).  Although used in the groundwater industry for the past two decades, seismoelectrical surveying is a relatively new method for the exploration of oil and gas at this time.    

SEISMIC REFLECTION

In the Fall of 2014, Texoma Exploration Group acquired industry leading 32 bit A/D wireless ISeis Sigma units to serve as our foundational backbone for current 2D & 3D acquisition operations. The flexibility of Sigma along with high production shooting via our XLR8 Accelerated Weight Drop mounted on an IHI-45 track unit, allows for an economically driven solution for the independent oil and gas producers.  The IHI-45 track unit allows TEG to hammer hard to reach source points without unnecessary clear-cutting of land, keeping surface damages low.  To further increase field production and lower overall acquistion costs, TEG invested in 10 Hz GS-One vertical geophones, which provide near equal sensitivities to 6x1 groupings.

PROCESSING

Unlike typical acquisition companies, Texoma Exploration Group employs several engineers and geophysicists that have the capability to process the acquired seismic reflection data.  TEG currently uses a seismic reflection processing package from Globe Claritas, which can handle both marine and land in 2D or 3D collection modes.  In-house data processing allows TEG to provide seismic services at extremely competitive rates.  Equally important, it provides a invaluable feed back loop for field acquisition and processing quality control. 

GETTING DEEPER

For deeper surveys, Texoma Exploration utilizes a LSR-315 vibroseis mounted on a 6x6 International Paystar.  The unit has a peak force of approximately 47,000 lbs and can employ sweeps ranging from 5hz to 120hz.  A combination of the accelerated weight drop and vibroseis can be used on the same survey to locate deeper targets while maintaining a low environmental impact.

GROUNDWATER EXPLORATION 

  Geo-electrical imaging is considered one of the most robust, but flexible in design and deployment, geophysical mapping methods for subsurface imaging in the upper 500 feet.  Electrical Resistivity Tomography (ERT) imaging takes advantage of the wide ranging electrical resistivity characteristics inherent with subsurface geology.  Induced Polarization (IP) is considered a supplemental measurement that enhances ERT interpretation and provide direct detection of shallow groudwater in certain conditions.  Texoma Exploration Group uses the Syscal Pro Meter, one of the most powerful and efficient resistivity meters built to date.     Seismoelectric (SE) sounding technique detects electrical signals generated by the passage of seismic waves through water bearing rocks and soils.  The potential quantity of the aquifer is estimated by semi-empirical relationships between signal bandwidth and amplitude and aquifer permeability.  Coupled with ERT, SE provides a powerful hydrogeological tool to prevent dry holes and maximize production value of a given aquifer.