IMPROVEMENT OF HYDROXYLIC ACID WELL PROCESSING APPLYING THE LATEST TECHNOLOGIES AND EQUIPMENT
The relevance the research is caused by the need to ensure uniform heating of the acid solution at the injection rates created by the units onto the thermoacid samples. A solution to this problem will improve the efficiency of acid and thermal acid treatments of highly drained wells with low reservoir pressure. The main aim of the research is to develop and propose a method of acid and thermoacid impulse, a methodology for its application and to create structures for underground and surface equipment of wells for implementation of the developed method.Objects. The volume of the solution poured into the tubing during thermo-acid treatment by the pulsing method depends on their length and inner diameter. Usually it is taken equal to 1,2-2 m3. If the filter or some its part turned out to be blocked with a sand plug in the well, scheduled for thermal acid treatment by the pulsing method, then they were preliminarily cleaned with a thief without opening the sump. A special perforated tip and a special filling head are used as well. Methods. Thermal acid (as well as acidic) treatment of a well by the pulsing method is carried out without the use of a pump unit, whichcan significantly reduce costs. Accelerating the movement of the acid solution, heating the entire volume to the desired temperature and creating pressure (due to the weight of the solution column) contribute to an increase in the depth of penetration and the effectiveness of the action of the acid on the formation.Results. The most suitable acid solution for thermoacid impulse is 15 % HCl, inhibited by unicol. Good results were obtained by introduction of the acid impulse method, which involves the use of a special tip, in which the nozzle channel is completely closed with a magnesium rod. As a result of the reaction, the magnesium rod dissolves in the acid solution, after which the latter rushes through the vacated choke channel and the perforated pipe into the filter, creating the so-called acid pulse, i. e. increase in the injection rate is achieved under the action of hydrostatic pressure.