Geology, geography and global energy

Scientific and Technical Journal

Lithological and stratigraphic characteristics of the geological section of the South-western Pre-Caspian

2017. 1, pp. 13-29

Mukhasheva A.Kh. - Astrakhan State University, 1 Shaumyan sq., Astrakhan, 414000, Russian Federation,

Volga-Akhtubinsk region in size of the estimated opening inventories of free gas belongs to the category unique, on complexity of a structure to category of the hardly removable, characterized by unevenness thickness and collection properties, and possible availability of tectonic screens. The major factors complicating development of these inventories are: weak study of productive thickness of the complex structure of the Bashkir tier determining limited quantity of representative basic data for carrying out technological calculations; treshchinno-porovy type of a collector, the characterized extremely low permeability of a matrix of breed. By analogy with close located Volga-Akhtubinsk region it is necessary to expect development of zone and focal development of zones of high productivity. According to the available data the Volga-Akhtubinsk region can be referred to category unique on inventories and structure of fluid system. The approved inventories of a deposit of the Bashkir tier constitute about 1 trillion m of gas, condensate about 250 million tons. The component structure of a fluid differs in the high content of sour components. The Bashkir productive horizon is characterized by essential heterogeneity of a structure on the area and a section, low capacitor characteristics and indicators of permeability that significantly reduces effectiveness of conducting exploration works.

Key words: , , , , , lithology, stratigraphy, sedimentation, drilling, coving