Services for Oil and Gas Companies

Why do we offer CO2 capture and disposal:

• Environmental aspect (in the medium-term perspective – to meet the challenges of decarbonization; in the long-term perspective – to prolong the life cycle of hydrocarbon energy)
• Possibility of obtaining benefits (emission quotas, taxes and subsidies)
• Possibility of involving depleted deposits with low reservoir pressure
• Experience of CO2 utilization and production intensification in the USSR:

— Samara region: Radaevskoye field: 787.2 thousand tons of CO2 were pumped from 1984 to 1989 and additional oil production amounted to 218 thousand tons. The specific effect was 0.28 t/t. Kozlovskoye field: 110 thousand tons were pumped and the specific effect was 0.125 t/t, as of 01.01.1988

— Tatarstan: Yelabuga deposit: 58.3 thousand tons of CO2 were pumped

— Bashkortostan: In 1967, injection of CO2 in the form of carbonized water at the Tuymazinskoye field. The specific effect was 0.17 t/t. Sergeyevskoye field in 1984, the impact by July 1989 was 0.23 t/t. The injected volume amounted to 73.8 thousand tons.

CO2, when injected into the reservoir, actively dissolves in reservoir fluids, initializing the following processes:

• International experience in the use of CO2 confirms that oil saturated with CO2 increases in volume – the effect of «swelling», which causes an increase in saturation and an improvement in the relative permeability of oil.
• CO2 is a very good solvent and reduces viscosity as well as increases the mobility of oil and gas condensate.
• An increase in oil saturation at the bottom will cause a decrease in relative water permeability, forming a barrier to water.

The formula of the treatment composition is optimized depending on the physical and geological conditions of the well, the composition of fluids and the positive experience of the client in the use of chemical reagents in the target field:

• The use of solvents before injection of CO2 allows you to restore reservoir properties of the formation and clean the bottomhole zone to increase the radius of penetration of CO2.
• The use of methanol-containing reagents (if necessary) with reservoir water causes its evaporation, increasing the useful volume of gas reacting with oil and condensate.
• The use of surfactants reduces the interfacial tension at the oil-rock boundary, increasing the mobility of oil and condensate and improving the operational parameters of the formation.

Gaz Service Consulting LLC performs complex turnkey carbon dioxide injection projects, including the following stages:

• Laboratory studies
• Mathematical modeling of processing
• Delivery of the estimated volume of carbon dioxide to the well by road transport
• Injection of CO2 into the well