СОВРЕМЕННЫЕ ПРЕДСТАВЛЕНИЯ ОБ ИСТОРИИ ГЕОЛОГИЧЕСКОГО РАЗВИТИЯ БАССЕЙНА ПРОДУКТИВНОЙ ТОЛЩИ НИЖНЕГО ПЛИОЦЕНА АЗЕРБАЙДЖАНА

Abstract

The deposits of the Producing Series (PS) for a long time considered to be the main reservoir on the land territory of Azerbaijan and the adjacent waters of the South Caspian Basin (SCB). But despite the fact that they are sufficiently long time are the object of study for geologists of different specialties and areas, however, are still a number of questions remains controversial. Based on existing evidence of geological and geophysical data, found that the sedimentary cover within the reach SCB - 30.0-32.0 km (Kerimov, 1996, Babaev, Hajiyev, 2006), with maximum values of its main tank - PS, within SCB not exceeds the apparent capacity of 4,500 to 6,000 m (Guliyev et al., 2003; Abdullaev, Gregory, Green, 2010). But some researchers believe that the deposit thickness PS within the deepest part of SCB reach 7000-8000 m (Mamedov, 2007, Alieva et al, 2008).The investigations were collected and analyzed in terms of significant primary geological and geophysical material, as well as a large number of literary sources and stock. Was collected and compiled a database based on the drilling parametric, shallow, structural-search, search-prospectig and exploration wells, including the value of the power of Quaternary, Akchagyl and Productive Series of the underlying sediments. Data were processed of wells drilled to more than 123 areas that have engulfed the area of land as Azerbaijan and the adjacent part of the Caspian Sea. Analysis of collected data allowed tracing the behavior of the power within this territory. On the collected materials were first constructed: Paleogeological map before Early Pliosene time, Map of Lower group PS and Map of Upper group PS for the land area of Azerbaijan and the Azerbaijan sector of the Caspian Sea.It was confirmed pre-existing opinion that the thickness of the bottom of the producing formation is not confined to a smaller area of distribution in comparison with the upper division, but also have significant differences in the values of their capacities, it should be noted that this is of apparent power that, is, without taking into account the angles of dip. Start the Productive Series characterized by increased cross-rises, which emanate from the axis of the Caucasian isthmus. As a result of these processes occurred almost complete draining of all the Kura Basin and the displacement of water paleobasin in the South Caspian bath (Hain, Shardanov,1952).At the same time they are in their profiles open up a new series of sandy formations Absheron facies Productive Series which were deposited at the beginning in such circumstances when the accumulation of sandy material occurred within a relatively small part of the territory of Azerbaijan – Absheron peninsula, Dzheyrankechmez depression, Lower Kura Basin and adjacent her area of modern Caspian Sea.Time for the upper section is characterized by a subsidence of the bottom paleobasin compensated and increasing the number of demolitions of terrigenous material in the sedimentation basin, where anticlinal uplift, affecting the conditions of sedimentation in the lower part, are beginning to acquire a more flattened shape. It was a time when paleobasin PS of the relatively small size of the reservoir at the beginning of the century began to expand PS, covering all large contiguous areas.Graphic material built by the author allows from a new angle to consider the geologic history of a century of Productive Series within the territory of Azerbaijan and the adjacent waters of the Caspian Sea and come to the following conclusions:- The processes of sedimentation over a century PS are characterized by a complicated character than previously thought;- The maximum deposit thickness without Productive Series dip angles cannot reach 6000 m.The research results will allow to adjust the location of burial for the more promising drilling wells for them within SCB. But it is also possible additionally to attract potential foreign investors interested in investing significant financial impacts to the oil industry of Azerbaijan. Key words: Productive Series, the South Caspian Basin (SCB), the depositional environment, the non-linearity of the structural plan, the power of productive strata