Вторичные изменения карбонатных пород Непско-Ботуобинской антеклизы юга Сибирской платформы и их влияние на коллекторские свойства продуктивных горизонтов

Abstract

Nepa-Botuoba anteclise is one of the most promising territories in Eastern Siberia, within which more than a half of the hydrocarbon resources are connected with carbonate reservoirs. One of the main tasks in the development of oil and gas resources in this region is associated with the forecast of the localization of reservoir rocks, which is largely determined by the degree of knowledge of the post-sedimentation proc-esses which have occurred. The article is dedicated to the influence of secondary processes on the capacitive and filtration properties of productive carbonate rocks of the Nepa-Botuoba anteclise. One of the wells drilled within its northeastern section has been taken as an example. The features of each of the post-sedimentation processes manifestation which took place were examined in detail and their influence on the filtration-capacitive properties of rocks of various lithotypes was assessed for all carbonate horizons penetrated by the well. The results of the research will help to increase the reliability of the forecast for the localization of carbonate rocks with improved capacitive and filtration properties, and therefore increase the efficiency of development of oil and gas resources in the considered region