The Arlanskoye field is the largest in terms of oil reserves, located in the north-west of Bashkiria within the Volga-Ural oil and gas province .
| Arlan oil field | |
|---|---|
| A country |
|
| Region | Bashkortostan |
| Opening year | 1955 year |
| Status | in the final stages of development |
| Subsoil user | Bashneft |
It is located on the territory of the Krasnokamsky , Kaltasinsky and Dyurtyulinsky regions of the republic and partially on the territory of Udmurtia . Includes Arlan, Novohazinskaya, Nikolo-Berezovskaya and Vyatka squares.
It was discovered in November 1955 and put into production in 1958. By 2010, the field had produced 500 million tons of oil, and 9.8 thousand wells were drilled. The first discovery is well No. 3, drilled by a team of oil explorators under the direction of master Sakhapov, located near the village of Ashit (15 km from Neftekamsk)
Geology
The length of more than 100 km, with a width of up to 25 km, is confined to a vast anticlinal fold with gently sloping wings. Oil-bearing sandstones of the Visean tier of the Lower Carboniferous age, carbonate reservoirs of the Kashiro-Podolsk productive stratum of Middle Carboniferous. The main reserves are concentrated in sandstones of the terrigenous sequence of the Lower Carboniferous (75% of the initial reserves) at a depth of 1400-1450 m.
The group’s initial oil reserves are estimated at 1.2 billion tons.
Development Technology
During development, waterflooding is used. The main method of operating production wells is mechanized. The total well stock is about 8 thousand units. Oil is produced with a high water content (93%). At the peak, production at the field reached 12 million tons per year.
Oil Characteristics
Oils are dense (840–894 kg / m 3 ), viscous (up to 30 mPa × s), sour (up to 3%), and low gas saturation (up to 18 m 3 gas per 1 ton of oil).
It is operated by the oil and gas production departments of the OGPD Arlanneft, the OGPU Chekmagushneft of Bashneft- Dobycha LLC and the OGPD-1 of Belkamneft OJSC.
Literature
- Gazprom Neftekhim Salavat. Encyclopedia. Ufa ed. Bashkir Encyclopedia, 2013.
- Geological structure and development of the Arlan oil field. Ufa 1997.