INTENSIFICATION OF OIL INFLOW FROM CARBONATE RESERVOIRS FOR THE CONDITIONS OF THE WESTERN SIBERIA FIELDS

Abstract

Relevance. The West Siberian region is currently one of the largest oil and gas provinces in Russia, but the problem of declining production is becoming more frequent there. This phenomenon is caused by various reasons, however the most frequent ones are such as lowering of formation permeability and productivity factor due to various complications of oil production in the bottomhole zone (bottomhole formation zone). As a result, it becomes necessary to carry out work to increase or restore the filtration-capacitance properties of the reservoir. The method of acid treatment of productive reservoirs, which contributes to the intensification of oil inflow into the well, has been actively used in the fields of Western Siberia. However, a significant part of the treatments does not give positive results. Improving the efficiency of acid treatments of wells is one of the main tasks of oil production today, which largely determines the relevance of this study. The purpose of this work is to analyze the degree of expediency of hydrochloric acid treatment in the field and determine the most appropriate method of treatment for carbonate reservoirs of the West Siberian field. Results. The principle of effect and peculiarities of the hydrochloric acid treatment for reservoirs of carbonate structure was studied. The choice and expediency of application of the technology in these conditions was substantiated.

Keywords

• geological and technical measures
• carbonate reservoir
• hydrochloric acid treatment under pressure
• hydrochloric acid solution
• inhibitor
• hydrochloric acid intensifier
• wells pressure testing