Rosnedra confirms tech-scheme for developing Achimov horizons
SALEKHARD. July 26 (Interfax) - The Western Siberian oil and gas section of the Subsurface Resources Agency's (Rosnedra) Central Commission for developing hydrocarbon deposits has confirmed a single technological scheme for developing the Achimov horizons in the Urengoi region (Yamal-Nenets Autonomous District), section chief Alexei Marchenko told Interfax.
"Urengoi region is split into eleven licensed sections, but at the lower strata it is one deposit, which is why the need arose for a single technological scheme," Marchenko said.
This scheme has been being worked on since 2007 by the scientific design and production complex TyumenNIIgprogaz (a Gazprom subsidiary) at the behest of eight resource developers that hold licenses to Urengoi region sections. The scheme lays out the timeframe for putting licensed sections into production and technical bases for deposit development.
The Urengoi region covers 12,500 square meters. Achimov gas-horizon reserves are estimated at 3 trillion cubic meters, condensate deposits at 1 billion tonnes, oil reserves at 2.5 billion tonnes.
"Sixty percent of these reserves are located in sections licensed to Gazprom Dobycha Urengoi, Arktikgaz, and Rospan International," Marchenko said.
In particular, Gazprom Dobycha Urengoi LLC holds the Urengoisky and Severo-Samburgsky sections; OJSC Arktikgaz ( a SeverEnergia LLC subsidiary, the controlling stake in which is held by a joint venture between independent gas producer NOVATEK and Gazprom Neft ) has Samburgsky and Yevo-Yakhinsky; and CJSC Rospan Internationa (a TNK-BP subsidiary) has Vostochno-Urengoisky and Novo-Urengoisky.
Additionally, Urengoi Gas Company LLC (belonging to VTB ) holds licenses to the Ust-Yamsoveisky section; oil company Severneft LLC - Zapadno-Yaroyakhinsky; NOVATEK-Tarkosaleneftegas LLC) - Olimpiysky; NOVATEK-Yurkharovneftegas LLC - Zapadno-Urengoisky; CJSC GeoResurs (acquired by TNK-BP and joined to Rospan International) - Resursny.
The Cenomanian hydrocarbon horizons are located at a depth of 1,100-1,700 meters, the Valanginian at 1,700-3,200 meters, and the Achimov at around 4,000 meters. The latter horizons are much more geologically complicated compared to the former two, under very high pressure of more than 600 atmospheres and weighed down by heavy paraffins.