Building of the deep 3d temperature model of the Hengill geothermal area (Iceland) from the ground electromagnetic data

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

The indirect electromagnetic geothermometer is applied to determine three-dimensional temperature model of the Hengill geothermal area up to the depth of 20km. Testing of the temperature model has shown that the accuracy of the temperature forecast at this depth is about 28,5%. The analysis of the temperature distribution in the Hengill area has shown that the background temperature consists of twp layers: from 0 up to 5km with temperatures below 200 °C and from 5 km to 20 km with temperatures in the range 200-400 °C. The background temperature pattern of the crust consisting is supposedly from gabbro a network of high temperature and low resistivity channels is indicated which like a «blood circulation» system cover the study area at the depths 10-15 km and root at depths larger than 20 km.......

  • 2014  № 2, pp. 61-69

Paleotemperature modeling to assess petroleum potential of the Lower Cretaceous sediments Nurol megatrough

(Osipova E.N. )

On the basis of paleotectonic reconstructions and paleotemperature modeling sections 39 deep wells of Nyurolsky megadepression mapped hotspots generation and an assessment of the distribution of the relative weight of the initial geological resources Bazhenov oils. Proposed priority of geological exploration for the identification of productive facilities in the lower Cretaceous sediments.......

  • 2014  № 2, pp. 70-74

Land seismic of new technological level

(Cherepovskiy A.V. )

Oil and gas companies put more and more attention to small-size and complex traps of hydrocarbons and to non-traditional reservoirs. Correspondingly, explorationists have to solve more and more complex tasks beyond structural imaging. To define the types of reservoirs and estimate their oil and gas saturation, 3D seismic of new technological level is to be applied. The latter is efficient only as an integrated technology incorporating the following aspects: 1) application of single sources and single receivers; 2) excitation and recording of broadband seismic signal; 3) high density (dense sampling of the wavefield); 4) full azimuths, 5) high-productivity field operations, 6) high-precision positioning of source and receiver points.......

  • 2014  № 2, pp. 75-83

Anisotropic Gaussian beam imaging of multicomponent walk-away VSP data

(Protasov M.I. Borodin I.V. )

The approach to true amplitude seismic imaging in anisotropic media for walk-away Vertical Seismic Profile (VSP) multi component data is presented. In the article the generalization of the imaging procedure for anisotropic media is discussed. The basis of the algorithm is Gaussian beams in anisotropic media. The use of anisotropic Gaussian beams allows taking into account anisotropy of the background model. The recovered true amplitude function is scattering potential. The algorithm provides possibility to recover structural disruptions (faults etc.) in the near borehole area. Choice to use Gaussian beams gives possibility to avoid imaging artifacts that are connected to limited aperture. The use of several components allows avoiding artifacts associated with the converted seismic waves. The efficiency of the method is demonstrated on data obtained for realistic models of the medium.......

  • 2014  № 2, pp. 20-25