Published December 2009
On the heat-energy potential of Jurassic deposits on the platform slope of skiff plate within Terek-Caspian foredeep
I.I.NuraliyevOn the last ten years our conception considerable has detailed in the geological structure and oil-gas potential of the Jurassic deposits on the platform slope of skiff plate within Terek-Caspian foredeep. The drilled deep wells on the south-east part of the platform slope of Skit plate in areas komsomdskaya, kochubeyevskaya are discovered in the middle Jurassic deposits play’s natural gas and high potential geothermal field with abnormal layer pressure and temperature, for example, area Torumovskaya well № 15 in middle Jurassic deposits in case opening shtutser mouth of well yilld of well geothermal water consist of-6828 m3/day, pm = 8.1-8.8 MPa, temperature-171 °C and layer pressure-73,5 MPa, beside on depth 5400 m layer t = 194°C. The thickness of middle Jurassic deposits within platform slope are changed 0,00-850 m. There deposits most quite pinching out in the South direction from Prekum trough to Terek-Sulach foredeep near town Kizilyar. Middle Jurassic deposits quite have been obsovered in the regional geophisic investigations and facies- paleogeographic reconstruction interpretations on the Central part of Terek-Sulak foredeep. Upper Jurassic deposits are lying down here to crystalline basement. Upper Jurassic deposits are presented on this place by halogenic formation. Middle Jurassic deposits are redused and bat-bayoss beds are denudated by malm transqration from west to south-east direction within folding board to Skif plate. Considerable part of Middle Jurassic deposits remains from denudation and are developed on the platform slope and presented by couse qraned fragmental rocks with high porosity and premobility. The named deposits are lying down titon halogen formation with thickness 1000-1200 m, which are presented by halite, silvinite mineral paragenesis. They may be are plays reliable screen rocks for middle Jurassic recervirs. The margine of orogen and platform slope is characterized by active tectonic situation and geodynomic stress condition zone. The tectonic and rifting processes just herein are taking plased are reflected on the platform slope of Skif plate, that’s why thay characterized by abnormal layer’s parameters in middle Jurassic reservirs. It is determinated oil-gas and geothermal potential not only middle Jurassic reservirs and cretaceous deposits as well.
