Issues of the journals for 2008 y.

Lithological Rock Units Identification and Reservoirs Detection Within the Terrigenous Section Based on Well-Logging Data

(Arkhipova I.Yu. Borisonik O.V. Mikolayevsky E.Yu. )

While developing geological and geophysical model of an oil field and calculating its oil reserve, the important task is lithology determination and reservoir allocation in a well. This paper discusses problems of making lithology matrix containing boundary values of geophysical parameters, which describe various lithology types of reservoir rocks. A new computer technique of lithology determination and reservoir allocation using lithology matrix and layer models of rock resistivity obtained with well logging is described.......

  • 2008  № 4, pp. 33-43

GPS Support of Exploration Activities: Problems and Prospects

(Prikhoda A.G. )

The condition and prospects of use of global navigation satellite systems GLONASS (Russia) and GPS (USA) as a basis for creation of a spatial information geological-geophysicalfield as well as the basic requirements to satellite technology of navigation-geodetic maintenance have been discussed. The great attention has been given to questions of metrological supports of the satellite equipment for definition of location and systems of coordinates used at geological-geophysical researches.......

  • 2008  № 4, pp. 44-51

Adaptive High-Frequency Measurements in Geoelectric Surveying

(Bezruk I.A. )

Industrial electromagnetic noise prevents electrical surveys from their wide use while oil and gas exploration. New approach towards coherent noise elimination from adaptive ТЕМ/IP precision signal using “series mode reduction ” is proposed. The proposed technique helps to suppress coherent noise 100+ times without desired signal distortion.......

  • 2008  № 4, pp. 52-54

Indirect Temperature Assessment in the Geothermal Zone by Electromagnetic Data

(Spichak V.V. Zakharova O.K. )

The use of a new method of indirect temperature estimation in the earth based on the electromagnetic (EM) data collected at the surface (so called “indirect EM geothermometer”) allows extrapolation of the temperatures measured in the drilled wells to the depths exceeding the depths of drilled wells 2-3 times. In doing so, the relative error of extrapolation to a depth twice as large as the well depth is 5 - 6%, and in case of its threefold excess the error is around 20%. This result makes it possible to improve significantly the deepness of geothermal research based on the available temperature well logs without extra drilling costs. The practical application of new approach provides the following facilities: (1) more exact temperature estimation in the depth extrapolation mode; (2) remote temperature estimates in the boreholes in areas characterized by extreme conditions for routinely used geothermometers; (3) involve into practical usage the geothermal reservoirs located at depths 3 - 8km actually inaccessible for drilling.......

  • 2008  № 4, pp. 55-62

Small-Scale Faults Detection

(Sidorov V.K. Tarantin M.V. Voyevodkin V.L. )

Three techniques for small-amplitude discontinuities detection are considered. The direct method used multiple drilling data, one used acoustic log data and one used large-scale gravity survey data. Gravity gradient on relief is introduced. It permits relation analysis between gravity field and surface features in the scope of the effect of small-amplitude discontinuities on this relation.......

  • 2008  № 4, pp. 63-67