SU916742A1 - Methode of consolidating hole bottom adjoining zone - Google Patents

Description

The invention relates to oil production and can be used for attaching the prize. worn zone sand-producing wells.

There is a method of attaching the well bottom-hole zone using synthetic resins hardening in the presence of acids {1].

This method of attachment can be used with a limited range of reservoir temperatures, the use of synthetic resins reduces the subsequent permeability of the bottomhole zone.

There is a method of attaching a well bottom-hole zone, which includes injection of a carbide resin curable with hydrochloric acid into the bottom-hole zone, and its foaming, the well being filled with sand with granulated magnesium for foaming, and then carbamide resin and hydrochloric acid are pumped through it. The result of the interaction of hydrochloric acid with magnesium is an exothermic reaction with evolution of hydrogen, creating additional porosity due to foaming of the resin (2].

The disadvantage of this method is its complexity, duration at time 15

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change it and use it only on non-water wells, since magnesium interacts with water.

The purpose of the invention is to reduce the time of the mounting process in flooded wells.

This goal is achieved by the fact that in the well-known method of securing the well bottom-hole zone, which involves injection of a carbamide resin hardened with hydrochloric acid into the bottom zone, and its foaming> the foaming of the resin is performed by burning a powder in the well.

The method performs as follows.

A carbamide resin is injected into the bottomhole formation zone. The well column is filled with hydrochloric acid of 10% concentration. In the sump wells lower powder charge, for example, ADS-5. The charge is activated. After combustion of the charge in the reservoir ye columns. forcing hydrochloric acid solution.

As a result of the treatment, the heat released during the combustion of the powder charge promotes the rapid setting of the urea resin, the gases released during the combustion of the powder

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foamed resin and create when it is polymerized with hot hydrochloric acid porous mass.

The use of the proposed method in comparison with the known provides the following advantages: $

_; the necessity of pumping a mixture of sand with granulated magnesium into the bottomhole zone is possible? the bottomhole zone of the flooded wells can be fixed.

PRI me R. In the bottomhole formation zone is pumped 600 kg of carbamide resin? the well string is filled with 3 m ^ 10% hydrochloric acid.

The BPA-3 pressure accumulator is lowered into the sump of the well, and the burner is activated; then, after the charge has burned, the hydrochloric acid solution is forced into the formation from the column to solidify the urea resin.

The positive effect of the application of the proposed method is to reduce the time of polymerization of the resin due to the heat generated by the heat during the combustion of the BPA-5? saving materials by eliminating the operation of sand and granulated magnesium in the bottomhole zone and ensuring the possibility of fixing the bottomhole zone of watered wells.

Claims (1)

Claim A method of attaching a well bottomhole zone, including injection of a carbamide resin curable with hydrochloric acid into the bottomhole zone, and its foaming, which is characterized by the fact that, in order to reduce the time of the attachment process in watered wells, foaming of the resin is performed by burning a powder charge in the well.