APPLICATION OF HYDROCHLORIC ACID TREATMENT OF BOTTOM-HOLE ZONES OF WELLS

Abstract

One of the main tasks in the development of oil fields is to extract as much of the natural oil reserves from the earth's subsurface as possible. The increase in the ultimate oil recovery from the developed reservoirs and the enhancement of oil production rates are largely achieved through the widespread introduction of oil production intensification methods.

The need to apply various methods of impacting the wellbore zone is primarily due to the imperfections in drilling methods used to open productive formations. This is especially true for formations with poor reservoir properties and low formation pressure. The less the permeability of the wellbore zone deteriorates during drilling, the less the need arises to use wellbore treatment methods. These methods have been applied in nearly all gas condensate reservoirs in Kazakhstan, Russia, and CIS countries with carbonate reservoirs. The primary acid used in the acid treatment of reservoirs is hydrochloric acid (HCl). The article presents the features and criteria for the application of the hydrochloric acid treatment method in the wellbore zone.