Published June 2013
The definition of collectors’ pore volume in conjunction with Garadagh underground gas holder expansio
R.R. JafarovGaradagh gas-condensate field with bank was explored and put in the commercial development in 1955. VII horizon gas-condensate pool of Garadagh field southern wing turned out to be the connected tectonically and lithologically screened structural trap. The pool is screened with tectonic faults in the eastern part and anticline folds. In the western part of the fold, where the VII horizon collectors are fully replaced with clays, the pool is screened lithologically. The VII horizon pool started to be explored with high rates and during 9 years were extracted 80 % of gas reserves. At the same time the exploration of oil banks was conducted in low rates and the oil development in pointed out period composed only 5 % from total reserves. After the VII horizon gas-condensate pool depletion, the underground gas holder creation planned. With this aim in 1980-1992 Soyuzburgas drilled 50 wells and since 1986 gas injection started. It is necessary to note, that during the development of gas and oil parts of the pool the liquid (oil and water) penetration into gas zone were occurred. Due to this reason pore volume of VII horizon collectors decreased. With the aim of collectors pore volume quantitative assessment the works on current gas-water contour definition were carried out and VII horizon effective gas saturated thickness map was made, and on the basis of it the collectors pore volumes were calculated within current gas content contour. The calculation results show, that the collectors initial pore volume decreased for 44.6 % in comparison with its current value. Thereby, it is necessary to apply conducted research works and calculations in accomplishment of Garadagh underground gas holder. In enhancement on the basis of required volume it will be possible
