JSC Samotlorneftegaz is one of Rosneft's key production enterprises in Western Siberia. It is developing the Samotlorskoye field. It was established in March 1999 as a result of reorganization of JSC Nizhnevartovskneftegaz.
The Samotlorskoye field is located in the Nizhnevartovsk district of the Khanty-Mansi Autonomous District-Yugra of the Tyumen Region,15-60 km to the north and northeast of Nizhnevartovsk. It is one of the largest oil fields in Russia and the world.
The main activities of JSC Samotlorneftegaz, which owns 9 license areas, are exploration and development of oil and gas fields, drilling of parametric, prospecting, exploration and production wells, production, preparation, processing, transportation and sale of hydrocarbon raw materials, development of oil and gas fields.
The area of a licensed site of Samotlor developed by Samotlorneftegaz is 2,516.9 square m. The field has 9,620 production and 4,890 injection wells equipped with the latest high-tech equipment. The length of oil pipelines is 5,911 km. An extensive network of hard-surfaced roads with a total length of 1,923 km is laid throughout the field.
The Samotlorskoye field was discovered in 1965; it was put into commercial development in 1969. Industrial oil and gas potential was found in 18 productive reservoirs associated with the Jurassic and Cretaceous systems, lying at depths from 1600 to 2500 meters. Initial production rate of wells is 47-1200—200 t/d.
In 1981, a first billion ton of oil was extracted at the field. In 1986, a second billion ton of oil was produced. The peak of oil production (about 150 million tons per year) was at the beginning of the 1980s; due to intensive production in these years, the reservoirs began to water out and oil production fell sharply. In 1996, 21.56 million tons of oil were produced. In the 21st century, due to the use of modern methods of oil production intensification, its production doubled. Over the years of the field's operation, over 20,899 wells were drilled, over 2.8 billion tons of oil was produced, more than 75% of the field's oil and gas production was taken away from it, and the reserve-to-production ratio is 47 years.