To problems of modelling for thermal Earth's field research

R.D.Mukhamedyarov

Institute of Aerospace Instrument-making

Lipatov st., 2, Kazan, 420075, Russia

The problems of modelling of processes on Earth surface and inside Earth are important both for theory and applications; it is connected with research of Earth thermal field. Long term experience of Institute of Aerospace Instrument-making in the fields of constructing and using radio-thermal imagers allows developing the unique method of processing thermo-imaging information of space- and aero- surveys in infrared thermal range - Mukhamedyarov's video-thermo-vision generalization method.

Video-thermo-vision survey is included in thermal prospecting methods composition which integrates physical methods of modelling and natural thermal Earth's field research. MVTGM is a geophysical method and has an essential differ from traditional aerospace methods which are widely applied in geological prospecting during many decades.

The essence of MVTGM technology is application consequence of the following conjectural lemma which is raised by R.Mukhamedyarov two decades ago: thermal radiation has memory about its origin; there is information in thermal energy radiated by the object about deep processes appeared in it.

Energetic system Earth-Space is unbalanced. The portion of sun energy is 99,98% in the Earth surface, depth - 0,02%. In traditional models is allowed that temperature regime is fully determined by ascend endogenous stream lower the neutral layer with power about the first tens meters. It seems to be that this obvious statement is wrong in geological scale of time. Energy exchange with Space affects deeper layers and is determined by geological structure of the environment, its dynamic and thermal properties of rocks. That is why volume models of the thermal radiation field in the depth which are built by layer generalization are strictly coordinated with multizone image of the Earth surface, meet with idea of dissipative structures in unbalanced open energetic systems, good tie up with models, received by other geophysical and geological methods. It is revealed some results.

Endogenous heat is passed through rocks by conductive thermal conduction, fluids convection and radiation.

Conductive thermal conduction is determined in minerals with electron conduction (gold, iron ore, polymetalls etc.) by diffusion of free electron, and in minerals which haven't electronic conductance - by vibration of lattice atoms.

Convective thermal conduction is determined by transfer of thermal energy by elastic vibrations. Vibrations are passed to adjacent molecule and energy of thermal movement is passed from the one layer to another gradually that characterize small value of fluids thermal conductivity.

Radio thermal radiation passing through inner parts of our planet by Mukhamedyarov's lemma remembers information about trochlear-break structure of rocks, as will further shown. By MVTGM technology trochlear location can be decrypted by conductive-contact thermal conductivity and break zones location (permeability zones) by convective - molecular thermal conductivity.

Thermal conductivity increases with grow of rocks density and depends on degree of gas water and oil satiation and this changing structure with penetration depth can be tracked and shown.

In connection with that video thermal imagers created by the "IAKP" and in the other countries have differ spatial, spectral and radiometric resolutions and were set on differ bearers (satellites, planes and dirigibles), so by successive increasing of altitudes natural generalization happens.

Consolidation of natural generalization properties and MVTGM allows extending sphere of offered services on two degree and enveloping all offers of geological prospecting and anthropogenic tasks on all continents and regions of the globe.

MVTGM algorithms aim on exposure and mapping the following new oil-gas-search factors; in this:

-            generalization of thermal field IR is directed to on selective reflection of block - morphostrtureљ construction (geodynamic blocks and boundary brakes) by structure floors;

-            equipotential thermometry is directed to exposure inner thermodynamic heterogeneityљ of block morphostructures;

-            linearization (synthesizing of three-four IR zones, improvement of spatial resolution and the following equipotential thermometry) is directed to separation of compression, tension, softening, decompaction zones of rocks with better collecting properties, which have zones of fluidflow with structural and non-structural types.

It is proved by experienced works of "IAKP" with MVTGM application, that remote IR-range (7,5÷13,5 mcm) allows to probe deep structure of thermodynamic field; consequentlyљ geophysical effect of remote probing is realized. The final results of IR thermal videoimages are:

-        New informational indicates: prognostic assessment, new laws;

-        Geothermal anomalies: rather and - contouring both in plan and section;

-        geodynamic anomalies: compression, tension zones, which influence on filter parametersљ - contouring both in plan and section;

-        anomalies of water saturation massif;

-        fluid-permeable zones, fluidizing breaks, , water exchange, groundwater load sites, non-amplitude zones of rocks desintegration;

-        direction of convective thermo-flows - descending, ascending;

-        not only open but deep structures - generally it is block and linear morphostructure, mapping of micro- amplitude block-breaking structures, new deformations of big radius of curvature, local deformations, breaks, flexures, which determines conditions of migration and cumulation of fluids in productive sedimentary complexes; detalization ofљ raising morphology by perspective horizons of sedimentary cover; neo-tectonic activity of structures;

-        geodynamic connections of blocks;

-        rocks, which differ by thermal conductivity, heat capacity, thermal inertia;

-        changeability of filter-collecting properties of horizon;

-        oil-gas-perspective thermodynamic situations on search areas; compiling of multilevel sections of thermodynamic field of slabby complex to help constructing ofљ three-dimensional geo-migratory models of fluid pools and deposits (fluid-geodynamic 3D model); seismology design, support-parametric and search boring based on preliminary fluid-geodynamic models; substantiation of borehole location on deposits;

-        geological engineering heterogeneity;

-        thermal regime of oil development and industrial equipment;

-        revealing of leaks in oil gas piplines, heating mains, water conduit; control for interior using.

Without replacement of traditional geophysics methods and contact geothermometry videothermovision generalization shown geological environment in the new angle and reveal some unknown features. By correlation to price and available to geological research data this method has not analogues.

On the stage of regional tectonic research it must forestall or accompany geophysical research by geotraverses and included in the complex of interpretation works at reconsideration of old geologic-geophysics data.

On the stage of average and large scale works it must forestall expensive field work. Objects of research can be hydrocarbon materials, fresh and mineral waters, infiltration uranium deposits, structure which control diamond, rock salt deposits, ores and other useful fossils, sites for creation of underground storage of gas in Russian Federation, CIS and foreign countries.

On the stage of local engineer-geological research the method is necessary as one of the components of science base for planning and monitoring of campaigns for using geological environment for industry.