Co Ltd «Specgeologorazvedka» is busy with geophysical research any difficulty, using shallow electrical exploration, prospecting seismology and geophysical survey o wells (logging).
In process of the survey the specialists of our organization use comprehensive approach in connection with resolution of geophysical methods with respect to physical properties of soil, what secures reliability and trustworthiness of obtained results.
For solving of geophysical problems modern electrical exploration equipment is used in our company: «ЭРП-1», devised by MES «Line» and Co Ltd «GEOSKAN-M», earthquake detection station «Diogen». Geophysical research of wells is carried out by well-logging set СКГ-2, which is equipped with the newest CAM equipment. Volume and kinds of geophysical survey depend on projecting phase, extent of study of the area and complexity of engineering-geological conditions. The structure of works is determined individually, the programme is drawn up according to the regulations.
Geophysical survey at site areas solves the following problems:
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Bedrock base top mapping;
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Determination of corrosion activity of soil;
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Determination of level, speed and direction of seepages of groundwater;
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Exposure and monitoring of dangerous geological processes (karstic, landslide processes, depressed zones, etc.)
Using of geophysics with drilling makes it possible to retrace stratum response in crosswell bay. Peculiarity of geophysical methods is possibility of their usage in out-of-the-way places, as well as receipt of a detail geologic-geophysical profile. Geophysical methods are used by Co Ltd «Specgeologorazvedka» for finding and prospecting of nonmetallics (sand, water, etc.) for the purpose of a cut in time and expenditure.
Geophysical survey of wells (logging), as a part of hydrogeological and engineering-geological works, solves such problems as a lithologic dismemberment of profile, detection of crumbling, karst gaps, detection of water-encroached and permeable ledges, determination of their effective height, estimation of capacitive and lithological properties of water-bearing rocks, study of relationship degree of water-bearing zones.
Logging survey is used to diagnose technical state and repair of wells. It can accompany drilling process for diagnosis of complications and prevention of emergency situations. Co Ltd «Specgeologorazvedka» geophysical crew employs the following kinds of geophysical survey in wells:
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natural gamma-ray logging
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electrologging
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caliper measurement
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resistivity measurement
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videologging, which makes it possible to delineate geological cross-section, water production intervals, status and design of wells without auxiliary interpretations and directly at the place of building and boring.
