Gazpromneft-Angara, a subsidiary of Gazprom Neft, has obtained a consistent inflow of oil from the Ignyalinskoye field (Irkutsk Region) benefiting from a new approach to the seismic studies. Following the multi-stage hydraulic fracturing, the flow rate of the first horizontal well drilled in this area exceeded 120 tpd, enhancing the commercial prospects of the project.
Located within the licence block of the same name in the Katangsky District of the Irkutsk Region, the Ignyalinskoye oil and gas condensate field forms part of the Chonsky project. Development of the Company’s East Siberian assets is hampered by their complex geological structure and the extensive geography of hydrocarbon formations. The high quality of seismic data processing and interpretation is one of several factors that could help reduce uncertainty about the project.
In its search for new tools to improve production efficiency, Gazprom Neft teamed up with a technology partner, Schlumberger to build a new seismic model of the asset which would clearly show the geological structure of formations and identify the richest oil-bearing zones. The tests run on two pilot wells drilled within the Ignyalinsky licence block proved the model’s relevance.
“Development of the new seismic and geological model for the Ignyalinsky licence block came as yet another confirmation of the fact that innovation is the right tool to tap into hard-to-recover oil reserves. Successful cooperation with partners such as Schlumberger, which have unique experience and competencies in complex mineral deposits, will help us progress at a much faster pace, reduce our costs, and finally create a highly efficient model for developing our assets in Eastern Siberia.”
Gazprom Neft’s Chonsky project focuses on the development of three Eastern Siberian assets located on the border between the Irkutsk Region and the Republic of Sakha (Yakutia), namely the Ignyalinsky, Tympuchikansky and Vakunaysky licence blocks. The licences for deposits within these blocks are held by Gazpromneft-Angara. The Chonsky project licence blocks lie some 100 km away from the Eastern Siberia—Pacific Ocean oil pipeline (ESPO). The fields included in the Chonsky project have total booked reserves of over 1 bn tonnes of oil and some 300 bn cubic metres of natural gas.
The total area of the Ignyalinsky licence block is 2,153 sq km. As at 1 January 2018, the field’s recoverable C1+C2 reserves were estimated at 67.8 m tonnes of oil and 45.4 bn cubic metres of natural gas. In February 2018, the first batch of oil from the Ignyalinsky licence block was shipped to the ESPO, with full-scale production expected to start in 2024.