Hydrothermal-metasomatic systems as the most important factor for the formation of elements of the oil and gas-bearing complex in the Bazhenov-abalak sediments

Abstract

A model of the activity of hydrothermal-metasomatic systems confined to certain structural elements is proposed in the present article. The model is based on the analysis of a large volume of traditional studies: measurements of porosity coefficients, permeability, pyrolytic measurements - together with specific measurements: isotopic composition of carbonate rocks, temperature of homogenization of gas-liquid inclusions, studies of the composition of rocks with a scanning electron microscope, a description of petrographic thin sections. The model allows to generalize the results of the impact of hydrothermal-metasomatic systems on the reservoir properties of the rocks of the BazhenovAbalak complex: constructive – leaching processes and increasing reservoir properties, and destructive – massive mineral formation that fills the pore space, up to the formation of secondary seals.

Keywords

• west siberian plate
• hydrothermal activity
• bazhenov-abalak complex
• catagenesis
• metasomatism
• isotope studies
• gas-liquid inclusions