Optimization of thermal steam treatment technology applied to Strelovskoye field using aquathermolysis catalysts

This study investigates the impact of process conditions, specifically temperature, pressure, and duration, on the composition and properties of high-viscosity oil extracted from the Strelovskoye field in the Samara region. The focus is on catalytic aquathermolysis and its potential for upgrading heavy oil. Laboratory simulations of the thermal steam treatment (TST) process were conducted with and without a catalyst, varying the time intervals (24-96 h) and treatment temperatures (250 and 300 degrees C).The synthesized iron-based catalyst precursor's efficiency in improving the quality of high-viscosity oil was evaluated using various physico-chemical research methods. The analysis revealed notable changes in the gas composition of the aquathermolysis products. Hydrogen sulfide content decreased, carbon dioxide content increased, and normal alkanes showed higher levels. Remarkably, the dynamic viscosity of the oil significantly decreased after TST at 250 degrees C, reaching a sixfold reduction compared to the initial sample. Similarly, TST at 300 degrees C resulted in an eightfold reduction compared to the initial sample and nearly a 4.5-fold reduction compared to the control sample after 96 h of treatment. Additionally, gas chromatography-mass spectrometry (GC-MS) data indicated intensified cracking reactions of CC bonds, leading to the formation of lighter products. These findings highlight the potential advantages of catalytic aquathermolysis in the upgrading of heavy oil, underscoring its ability to modify the composition and properties of high-viscosity oil extracted from the Strelovskoye field.

Automated summary

This study investigates the impact of process conditions on the composition and properties of high-viscosity oil extracted from the Strelovskoye field. It found that catalytic aquathermolysis has the potential for upgrading heavy oil and modifying its composition and properties.