OIL AND GAS WELLS PRODUCTION STIMULATION
OUR TECHNOLOGIES
Technologies of Thermical influence on the reservoir
The main goal of these technologies is to increase the production rate by thermobaric effect on reservoirs and fluids.
The technology consists in the injection of mixtures of chemicals to the downhole area. The injected mixtures of chemicals react with each other downhole and inside the formation. As a result of the chemical reaction a huge amount of gas is emited. Due to this thepressure & temperature in the treated area are significantly increased.
Depending on the composition of the reaction mixtures, the result of the treatment is the creation of a network of new fractures in the productive formation which increases the permeability of the near-wellbore area, and also thermal effect on the formation fluid – oil or gas condensate – with the conversion of heavy hydrocarbon molecules in gas or gasoline molecules. Because of physical effect which is created in the formation (the -fractures) this technology is comparable to hydro fracturing.
These technologies are appliedin wells with low-permeability reservoirs, and / or high-viscosity oil, as well as in case of formation of gas condensate in the areas of depression cones.
Technologies for isolation of formation water inflow
The main goal of these technologies is to stop or decrease the water inflow from the formation to the well, and decrease the expenses on the treatment of extracted oil for its transportation.
The mixture of chemicals is designed based on specific condition of each well and can be based on mineral blockers, polymers, or hydrophobizators.
Acid Treatment Technology
For acidizing, most of the well services companies use Hydrochloric Acid, what implies in several cases many adverse effects, such as oil bituminization, reservoir skeleton’s destruction, impossibility of far formation area’s treatment due to the high reaction rate, etc.
We created a new acid solution based on a mixture of organic acids & phosphoric acid which has not the above mentioned negative effects, and has the following advantages:
- The higher reaction time of this solution increases the radius of treatment in the productive formation.
- Our acid solution is applicable for both carbonate and sand formations. In formations with clay, it doesn’t make any clay hydration, and doesn’t reduce the permeability of the productive formation.
- In comparison to Hydrochloric Acid, our acid solution has lower corrosive effects on metallic surface of casing and tubing.
Temporary Well Killing Technology
ESPROENKO has introduced a new technology for temporary well killing. In this technology, a high density solution is injected to the well. This solution at temperature & pressure of wellbore, will turn to a strong homogenous jelly structure which is stable and long lasting in well conditions. The viscosity of jelly is high enough to prevent the penetration of the killing fluid in the formation. Killing the well by this method is very fast and the whole process will take only few hours.
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