Organic carbon distribution in the Kuonamka formation (Cambrian series of Siberian Platform)

Source rock characteristics such as Organic Carbon content and distribution play the key role in petroleum potential prediction. One of the main source rocks of Siberian platform is Lower and Middle Cambrian Kuonamka Formation. The paper is a review of geological, geochemical exploration maturity on Kuonamka source rock including organic carbon distribution. Traditionally, these parameters are presented in the form of averaged organic carbon content maps of over the source rock. In case of the lack of analytical data or the high level of organic matter maturity, the alternative is to construct a set of organic-rich deposits thickness maps with fixed ranges of total organic carbon. The aim is to form the organic-rich deposits distribution schemes for Kuonamka formation using all available geological and geophysical information, paleogeography reconstruction as well as common theoretical models of organic matter deposition. The reconstruction was performed based on the analysis of direct measurement data (sections of 22 outcrops and 11 wells) and the results of interpretation of radioactive logging (13 wells). Received schemes and corresponding quantitative models may be used as a basement for hydrocarbon generation volume and dynamics and subsequent estimation of hydrocarbon resources in Lena-Tunguska and Leno-Viluy petroleum regions