Geophysics

Lab activity

Geophisical laboratory is used for education and for research in the framework of scientific and professional projects. The Laboratory for Geophysical Exploration is equipped with modern geophysical instruments and equipment used by various geophysical exploration methods such as magnetotellurics, seismic methods, electromagnetic and electric measurements, magnetic methods and measurements in shallow wells. The instruments are mainly in practical use in the field, while testing and calibration, upgrading and development of instruments and equipment are performed in the laboratory. The laboratory provides a number of measurements on samples: determination of density, electrical resistivity, etc. The latest software for processing and interpretation of geophysical data that are used in professional and scientific projects is available in the laboratory. Software testing and upgrading is continuously performed as well as development of our own software. The laboratory also consists of a workstation using the Petrel software (Schlumberger Ltd.) used for the interpretation of 3D seismic data in petroleum geology explorations. Interactive Petrophysics (Senergy Software) is used for analysis and interpretation of well logging data. The workstation is used by students during the creation of their final and graduation theses as well as by postgraduate students.

Head of the Lab: This email address is being protected from spambots. You need JavaScript enabled to view it., Asst. Prof.,PhD

Services

Geophysical measurements and data interpretation within the scope of hydrogeological exploration, engineering geology exploration, building materials deposits exploration, hydrocarbon reservoir exploration, geological structure explorations, environmental explorations and monitoring for the purpose of environmental protection, archaeological exploration using the available geophysical methods:

Electrical methods (electric tomography and sounding, spontaneous potential measurement)
Seismic refraction and reflection
Magnetotelluric method
Magnetic methods
Electromagnetic methods using moving transmitter
Georadar
Well logging to a depth of 500 m (electrical resistivity, spontaneous potential and natural radioactivity)

Analytical procedure and test method

Analitic procedure		Test method
Refractive research
Reflection seismic exploration (HRS method)
Seismic tomography
Geophysical exploration in boreholes
Geomagnetic research
Measurements of electrical resistivity rock
Deep measuring the electrical resistance of rocks magnetotelury method
Automatic measurement of resistance of rocks more electrode system
High-resolution contactless conductivity measurements rocks
Conductivity measuring by moving the transmitter method
Logging spontaneous potential, electrical resistivity and natural radioactivity
Electromagnetic research discontinuity in the underground
Measurements of gravity

Small and medium sized equipment

Name inventory	Tech.characteristics	Application	Image
Terraloc Mk 6 Seismograph	Operating frequency 2-4000 Hz, 21-bit digitizer, dynamic range 126 dB.	Seismic explorations in hydrogeological, geotechnical, environmental and other surveys.
Borehole Geophone BHG-2	Three 14 Hz geophones in X, Y and Z orientation, with compass and servo-mechanism for automatic orientation of horizontal geophones.	Borehole geophysical measurements in hydrogeological, geotechnical, environmental and other surveys.
SARIS - Scintrex Automated Resistivity Imaging System	Output power 100 W, maximum output voltage 500 V, input resolution 0.15 μV, input voltage range ±40 V.	Electrical sounding, profiling and 2D and 3D tomography explorations in hydrogeological, geotechnical, environmental and other surveys.
TERRAMETER SAS 1000	Output power 100 W, maximum output voltage 400 V, input resolution ±30 nV, automatic input voltage range ±250 mV, ±10 V, ±400 V.	Electrical sounding, profiling and high-resolution 2D and 3D resistivity explorations in hydrogeological, geotechnical, environmental and other surveys.
ABEM ES10-64C	10 x 64 channels standard configuration, 12 V DC power supply via Terrameter SAS 1000.	Electrical sounding, profiling and high-resolution 2D and 3D resistivity explorations in hydrogeological, geotechnical, environmental and other surveys via Terrameter SAS 1000.
OHMMAPPER TR1	Operating frequency 16.5 kHz, maximum transmitter output voltage 1000V AC at current levels of 16 mA.	High-resolution subsurface resistivity profiling and imaging in hydrogeological, geotechnical, environmental and other surveys.
EM34-3XL Electromagnetic System	Range of conductivity 0-10, 100, 1000 mS/m; measurement precision ±2%; intercoil spacing 10, 20 or 40 m; operating frequencies 6.4, 1.6 or 0.4 kHz.	Electromagnetic surveys in hydrogeological, geotechnical, environmental and other surveys.
GSM-18 PROTON PRECESSION MAGNETOMETER	Resolution 0.1 gamma, measurement precision 0.2 nT, data range 20000-100000 nT, input power 12V at 700 mA.	Magnetic measurements for discovering magnetic rocks, magnetic building materials (diabase, andesite, basalt) and other magnetic objects in geotechnical, environmental and other surveys.
PROSPEKTOR 410 GRAVIMETER	Data range 3500-6000 mGal, fine skale range 100 mGal, precision 0.01 mGal.	Gravimetrijska istraživanja u okviru naftnogeoloških istraživanja i mikrogravimetrijska istraživanja u okviru geotehničkih, inženjerskogeoloških, hidrogeoloških, istraživanja okoliša i drugih istraživanja.
Well logging equipment, Robertson Geologging	Maximum depth 500 m.	Well logging measurements in hydrogeological, geotechnical, environmental and other surveys.
GPR RAMAC X3M	Number of samples/trace 128-8192; 100, 250 and 500 MHz shielded antennas.	Shallow subsurface measurements in hydrogeological, geotechnical, environmental and other surveys.
STRATAGEM EH4 MagnetoTelluric System	Frequency range 11.7 Hz-100 kHz, BF6 magnetic field coils, transmitter antenna 400 Am2.	Deep subsurface imaging in hydrogeological, geotechnical, environmental and other surveys.
Seizmograf DMT X One	Broj kanala: 2x50 Frekvencijsko područje: 0 Hz do 0.8xNyquist Dinamički raspon: do 132 dB Razlučivost uzorkovanja : 32 bitni analogno-digitalni pretvarač signala Prilagodljivost sustava: SNAP tehnologija	Primjena: Seizmička istraživanja u okviru geotehničkih, inženjerskogeoloških, hidrogeoloških, istraživanja okoliša i drugih istraživanja.
Protonski magnetometar GEM GSM-19T	Osjetljivost – 0.15 nT @ 1 Hz Razlučivost – 0.01 nT Preciznost mjerenja – +/- 0.2 nT Dinamički raspon – 20,000 to 120,000 nT Gradijent polja – preko 7,000 nT/m Korak uzorkovanja – 60+, 5, 4, 3, 2, 1, 0.5 sec Radni temepraturni raspon – -40 to +50 °C	Primjena: Istraživanja magnetičnih stijena i geoloških modela u kojima se pojavljuju. Istraživanja magnetičnih građevinskih materijala (dijabazi, andeziti, bazalti) i istraživanja u okviru geotehničkih, inženjerskogeoloških, istraživanja okoliša i drugih istraživanja.

Teaching in the laboratory

Teaching in the laboratory in 2016/2017 (Students scientifice research)	Name and surname of student	Thesis title
*BSc thesis*	Martina Perutina	Synthetic seismograms determination using Interactive Petrophysics software
Diplomski radovi / MSc thesis	Valerije Makarun	Seismic interpretation of Katarina gas field using the Petrel 2014 software platform
	Alan Turk	Application of seismic attributes in evaluation of reservoir characteristics in the Katarina gas field
	Ivana Žanić	Magnetotelluric exploration in the area of Apatovac

Projects in the laboratory

Projects in the laboratory in 2016/2017
Scientific research (including University support)	Expert projects
Exploration of deep carbonate aquifers using the magnetotelluric method	Geofizička istraživanja magnetometrijom na području prokopa Korana − Kupa - trasa nasipa
Seismic exploration of the Earth's crust and upper mantle structure	Vodoistražni radovi na području Marčane − Ližnjan - geofizika II. dio