A study of perforation fluids for secondary opening of productive formations at the Bovanenkovo oil and gas condensate field

Abstract

When leaving the drilling of gas wells at the fields of Western Siberia, various methods and technologies are employed for their development, such as the secondary opening of productive formations. While undertaking the secondary opening, it is essential to maintain the reservoir properties of the bottomhole formation zone. Liquids for perforation work must be employed for this purpose. Simultaneously, it is recommended to use salt-based perforating liquids treated with CMC-700 and sulfacell, on a hydrocarbon basis (diesel fuel and gas condensate) and on acidic compositions with a high permeability recovery coefficient for carrying out perforation work at equilibrium and depression. After conducting laboratory experiments, we have selected perforating liquids with a permeability recovery coefficient of over 96 % and perforating liquids based on acid compositions with a permeability recovery coefficient of over 180 %.