Geology, geography and global energy
Scientific and Technical Journal
OPTIMAL GEOLOGICAL AND GEOPHYSICAL RESEARCHES IN STRUCTURAL WELLS IN ORDER TO INCREASE EXPLORATION EFFICIENCY UNDER SALT AND DOME TECTONICS
2014. №3, pp. 25-28
Alekseev Andrey G. - C.Sc. in Geology and Mineralogy Head of the Geological Department, JSC В«LUKOIL-NizhnevolzhskneftВ», 1 Admiralteyskaya st., Astrakhan, 414000, Russian Federation, Andrej.Alexeev@lukoil.com
Andreev Leonid A. - Geologist of 1 category, JSC В«LUKOIL-NizhnevolzhskneftВ», 1 Admiralteyskaya st., Astrakhan, 414000, Russian Federation, Leonid.Andreev@lukoil.com
The problem with the definition of the roof of salt is a standard problem in conducting exploration under salt-dome tectonics, particularly in the Caspian Basin. Indeed, the high accuracy in determining the roof salt, especially in the slope of the salt dome is very high. Within the Central Astrakhan arch on the southern Caspian depression board highlighted areas where seismic data method does not allow one to determine the characteristics of deep geological structure as the parts of the section, and post-salt complex. These areas are areas of poor quality tracking subsalt reflections under salt domes, the zone of anomalous development of wave-interference of various types, areas of salt domes with high saturation inside-salt reflections on seismic characteristics similar to the subsalt. The basis of the interpretation of seismic data in such areas is to determine the material composition of sediments forming slots cut in the time of the possible registration of subsalt reflections. This article discusses the optimal complex geological and geophysical studies carried out in the structural conditions of the wells in salt-dome tectonics, allowing combined with seismic and VSP methods to solve problems correctly structural construction.
Key words: соляно-купольная тектоника, миграция, глубинно-скоростная модель, скорость распространения волны, структурная скважина, структурное построение, анизотропия, кроссдипольный акустический каротаж, пластовая наклонометрия, волна Лэмба-Стоунли, salt and dome t
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