Modeling gives a chance to estimate the frequencies range and to make a choice of optimum parameters of the observation system for decision of formulated geological problem. Important stage which prevents field measurement is mathematical modeling of geoelectric structure of work site.
Also well-known formats of the data (Mackie, Rebocc, EDI, J, USF) are supported. ZondMT2duses simple and clear text format of data allowing to combine easily various systems of observation, including information on topography and other additional information. Convenient interface and variety of data visualization features allow to solve wide range of geological problems with maximum effectiveness. ZondMT2d represents ready solution for magnetotelluric soundings, and solves wide range of problems from mathematical modeling and sensitivity analysis to field data processing and interpretation. Comfortable control system allows to choose from the great number of equivalents results that will appear to be the best in geophysical and geological point of view.
Geophysical zond crack software#
While developing software special attention was paid to comfort and simplicity of its use, variety of visualization features and account of a priori data.ĭepending on the interpreter’s choice, software gives different variants of data interpretation algorithms. Thus, MT curves reflect change of resistivity vs depth.Ĭomfortable interface and wide possibilities of data presentation allow to solve given geological problem with maximum effectiveness. Investigating of distribution of resistivity with depth possible due to the phenomenon of skin-effect which defines the depth of electromagnetic field penetration vs frequency. This group of electroprospecting methods is based on studying of the natural variable electromagnetic field, allows to study distribution of the Earth conductivity on depths from the first meters to many tens and hundreds kilometers.
Geophysical zond crack series#
The inversion of ultrasonic data provides a series of elastic moduli that can be used to make a rough approximation of Poisson's ratio from the onboard data, which is a key physical property for interpreting geophysical observations in the oceanic lithosphere.ZondMT2d software is designed for two-dimensional interpretation of magnetotelluric (MT) data in MT, AudioМТ and RadioMT frequencies range The relatively high aspect ratio and hence high fluid flux at shallow depths are also consistent with the onboard resistivity data and present-day hydration processes inferred from the borehole fluid chemistry.
Geophysical zond crack crack#
We found a positive relationship between aspect ratio and hydrated fraction, suggesting a change in crack shape related to dissolution–precipitation processes during hydration. Application of the effective medium theory to onboard data, such as P-wave velocity and porosity, indicates that the average pore aspect ratio is mostly between 0.1 and 0.01, and crack density varies from 0.58 to 0.02. We assume that the difference between the solid matrix and measured onboard ultrasonic velocity is attributed to cracks with a spheroidal shape in the samples. First, we estimated the hydrated fraction from grain density to obtain the porosity-free matrix velocity, which indicated complete serpentinization at shallow depths and decreasing hydration at greater depths.
To assess the geometry of cracks in highly altered peridotites, we analyzed the ultrasonic velocity of serpentinized dunites and harzburgites collected by the Oman Drilling Project (Holes BA1B, 3A, and 4A).
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