Petroleum potential of Lena-Tunguska oil-gas-bearing province
Nowadays, an oil-gas complex at Eastern Siberia and the Far East is considered the most dynamically developing center of Russian petroleum industry. At that, a dif cult oil will become the main source of oil production increment in the years to come. Among the oil-bearing basins containing maximal number of dif cult oil reservoirs (including those with abnormal in-situ temperatures and pore pressures), there is Lana-Tunguska oil-gas-bearing province.This article brie y summarizes modern data on the oil potential of Lena-Tunguska province, as well as the results of authors' investigations related to oils of Chayanda, Upper-Viluchan, and Tas-Yuryakh elds located in Nepa-Botuoba oil-gas-bearing region, which is an utmost studied and promising part of Lena-Tunguska province. Authors show the following: the tested oils from Botuoba horizon of Chayanda eld are heavy, waxy, highly tarry, sulfur-bearing, methanoic; the Upper-Viluchan oils are heavy, medium-waxy and waxy, medium-tarry and tarry depending on berried horizon, sulfur-bearing, methanoic. A Botuoba horizon uid of Tas-Yuryakh gas-oil- condensate eld is considered an oil-gas-condensate mixture which is medium-waxy, medium tarry, medium- sulfurous, methanoic.