South Caspian Basin 1
The onshore Turkmenistan portion of the South Caspian Basin includes the Cheleken Peninsula and coastal areas to the north and south. The offshore region includes the eastern portion of Apsheron-Pre-Balkhan anticlinal trend and the Chikishlyar-Okarem zone Turkmenian structural terrace see Figure 6-2 . Oil seeps and dozens of mud volcanoes are found in Turkmenistan Figure 7-31 . At least two giant fields have been found in the Turkmenistan portion of the South Caspian Basin Cheleken and...
Region I Apsheron Peninsula
Oil- and gas-bearing zones in the Apsheron Peninsula are mainly of Middle Pliocene Productive Series , Upper Pliocene Apsheronian Stage , and Miocene Diatom Suite, Chokrak Formation ages. The main oil- and gas-bearing and productive interval here is the Productive Series, which is subdivided into two divisions. The Upper Productive Series i.e., the upper division includes the following suites from top to bottom Surakhany, Sabunchi, Balakhany, and Pereryv the first break in deposition . The...
Theoretical and Empirical Equations Relating Porosity Permeability and Surface
In a reservoir modeled by a bundle of capillary tubes, the rate of flow q is given by the Hagen-Poiseuille equation where q is the volumetric flowrate, cm sec N is the number of capillaries rc is the capillary radius, cm Ap is the differential pressure across the capillaries, dyne cm2 is the fluid viscosity, poises, and Lc is the length of capillaries, cm. The Darcy equation for rate of flow q is where q is the volumetric rate of flow, cm sec k is the permeability, darcys A is the total...
Azerbaijan Portion the ApsheronPreBalkhan Trend
The situation changed following the discovery of the Gyuneshli Oil Field when the Kaspmorneftegazprom Production Association obtained modern floating deep-water drilling rigs. Subsequently, detailed CDP surveys were conducted on the structures discovered in the region, and the Azeri and Chyragh structures were delineated. Most of the large structures, however, were studied only by the wide-spaced seismic surveys, and the broad band of offshore area immediately adjacent to the Neft Dashlary...
Environments of Deposition
One of the most important aspects in reservoir characterization is an understanding of depositional environments in the area under study. Depositional environments and facies relationships, diagenesis and catagenesis strongly affect the size, shape, pore-space geometry, porosity, permeability, and location of clastic deposits. The main oil- and gas-bearing region in Azerbaijan and the South Caspian Basin is the western portion of Apsheron-Pre-Balkhan anticlinal trend Figure 7-1 and the main...
Modeling Of Sedimentary Sequences Based On Welllogging Data
For the purpose of classification and detailed correlation of the stratigraphic sections in the oil and gas fields of the South Caspian Basin it was found expedient to subdivide and model the section as a stratigraphic sequence of different lithologic units Buryakovsky and Dzhafarov, 1984a . Lithologically, the Productive Series represents a rather monotonous succession of sands, silts and shales, with the sand-silt to shale ratio of about 1 1. The thickness of the Productive Series offshore...
Lithostratigraphic Framework
Past environmental conditions and the lithology within the g osynclinal regions are responsible for physical and chemical properties of sedimentary rocks. Post-depositional alteration diagenetic and epigenetic of sediments is dependent upon a great number of factors. Discovery of commercial oil and gas accumulations, and reserve evaluation, require the investigation of both reservoir and caprock properties. This is especially important for young sedimentary basins, which are characterized by...