61st EAGE Conference and Exhibition

Anisotropic poro-elasticity (APE) is a model for the evolution of fluid-saturated microcracked rock undergoing (pre-fracturing) deformation.

Versatile 3-component frequency EM systems operating at diffusion frequencies recently became available for use in slim mineral-exploration boreholes.

We introduce the single-borehole frequency-domain EM profiling method, in which a magnetic dipole transmitter (Tx), oriented along the borehole path, and a 3-component dipolar magnetic receiver (Rx) are moved together in the same borehole at a fixed separation.

For the interpretation of resistivity inversions in fractured granite, it is necessary to estimate the effect of the fractures on the inversion result.

Remote reference (RR) magnetotelluric (MT) measurements were carried out over Eastern Indian craton. All the data were processed with hybrid robust technique. A stitched section was prepared from 1-D MT inversion scheme using very fast simulated annealing (VFSA) technique which served as an input data for 2-D modelling. VFSA with splines bas been used for the 2-D inversion. 2-D subsurface conductivity model over the craton shows that the granitic crust is electrically homogenous with as high a resistivity as 30,000 ohm-m. Its depth extent is 38 km.

Geophysical data including CDP seismic (Marine Arctic Geological Expedition-MAGE, Sevmorneftegeofizika-SMNG, Murmansk, Sevoteam-joint venture Norwegian/Russian company), Wide Angle Deep Seismic Profiling-WADSP (Sevmorgeo,St .Petersburg, MAGE), refraction shooting (Institute of Physics Land, Moscow, Sevmorgeo) and gravity/magnetic (MAGE) have been intérpreted to study a Jeep geological structure of the Kola-Karin Monocline, located in the southwestem part of the Barerts Sea Shelf.

21st century envisages the increase in prospecting new oil and gas fields on the arctic shelf of Russia with special attention being paid to purposeful location of oil fields in internal (coastal) shelf not only of the Pechora sea but also of the southern parts of the Kara and Laptev seas.

The Sea of Okhotsk-Sakhalin Island area of Far East Russia is one of the world's most exciting petroleum exploration areas and offers unique opportunities for further major discoveries.

Explorationists have ever since been used to compare sedimentary basins and provinces. To this purpose they are used to build, upgrade and invoke "models" to export information and concepts from well-known basins into less defined areas. Working by analogy is a time-consuming process which needs experience, expertise, sensibility and is based on the "processing" of a large amount of "data" (and opinions) in various formats and from different sources.

Basin modelling aims to reconstruct the accumulation of hydrocarbons at basin scale, and at geological time scale, taking into account the effects of kinematics displacements, sedimentation, erosion, compaction, temperatures history, overpressures and fluids flows (water and hydrocarbons). Furthermoze, explorationists wish to address overpressure reconstruction in order to estimate the risks of drilling.