SU1019073A1 - Method of working hole bottom zone of injection well - Google Patents

Abstract

METHOD OF TREATING THE PRIZEC HCrfil BOTTOM WELL AREA, which is locked in a pervodichesky start-up (zhraviki on a napiv, characterized by the fact that, due to the increase in efficiency of the cleaning of the eaipivic maturity, is given to the application of a borehole at the expense of the efficiency of leaching of the effluent from the layer before the application, after the discharge of the well at the expense of the efficiency of leaching of the effluent from the source before the application, after the injection of the well at the expense of 1h and

Description

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The invention relates to the oil producing industry, in particular to methods for processing the bottomhole zone of injection wells, aimed at improving the injectivity.

The known method provides for an increase in the intake rate of an injection well due to the injection of water into the well with a frequency equal to its own frequency of oscillations of a fluid stop in a well. by intermittently interrupting the fluid flow fl.

The disadvantage of this method is low injectivity of the well due to insufficient cleaning of its bottom hole zone.

A known method of treating the bottomhole zone of the injection well, which is in a periodic start-up of the well, has been drunk before the appearance of clean water 2 ..

The disadvantage of this method is the extremely low injectivity of the injection well due to insufficient washing out of the silting material.

The aim of the invention is to increase the injectivity of the well by increasing the efficiency of washing the silting material.

This goal is achieved by 1, which, according to the method of processing the bottomhole zone of the injection well, consisting in periodic start-up of the well at the bottom of the well, is pumped epectro e (1-flow water) before the start of the well.

Example 1, Modeling reservoir is being prepared. For this, glass tubes with a diameter of 21 mm and a length of 3–3 mm are filled with quartz sand, 0, O63-O, 5 mm in size. One end of the tube is silenced with a stopper with a tap, and the other end with a mesh with a cell size of 0.063 mm. Activated sludge, formed by clogging (clogging) of the pores of the formation with suspended particles, is simulated with calcium clay. For this, a 1% suspension of clay is prepared and passed through a formation model. For comparative tests, "tubes are taken, the flow rate of the distipirovanny water through which up to the colmatage is 60 ml / min with a drop of 2.2 m of water column. The clogging of the pores of the model with clay particles was carried out until the flow rate decreased by 10 times. At the same time, 3.2–3.6 g of clay is deposited in the tubes.

Activated water is obtained in a laboratory electropicizer consisting of a copper anode and a cathode, as well as in an electropisor with platinum electrodes. The distance between the electrodes is 1-2 cm. The water treatment (1 L) is carried out at a current of 1 A, time 15 s.Replektaty comparative tests of the known and proposed methods are given in table. one.

Table

In all experiments, the volume of the spout fluid, i.e. flowing in the opposite direction to the flow of the clay suspension corresponds to 400 mp, 50

As can be seen from the table, 1 when using the proposed method, the mass of the eluted particles is on average 75% larger than with the known method. ,

The minimum contact time of the activated water with particles of sludge in the reservoir.

the required dp of the aaipivative material loosening and the possibility of washing it out of the divers are established by installing a control structure1 of the mechanical and rheological parameters of their concentrated slurry slurry

Table 2 shows the kinetics of changes in the parameters of cycnetcHR and ip in activated water.

From the resulting particles, the peptaation of particles in the act of active air is completed in the first two hours, since the value of the stresses of the sovig and the pressure of the viscosity is stabilized and. 25 remain constant.

PRI m er 2. Processing podkakaka-. Well Well 4231 Yuzharpanneft. In the control process without treatment, it was set to be adjusted (according to the content of water in the zo-poured water, which received material).

table 2

that it is necessary to pump 1 O5 m of activated water into the bottomhole zone. Activated water is obtained directly when it is pumped into a special electrolyzer; it is set to 1H1H | on the bypass guideline. %

The efficiency of the method was evaluated in comparison with the known, the results of the extraction of the silting material are given in Table. 3

T a b c and c a 3

Claims (1)

METHOD OF TREATING A BOTTOM ZONE OF A SHOULDER WELL, which consists in periodically starting a well at a spout, characterized in that, with a chain to increase the injectivity of the well by increasing the efficiency of washing out the silt material, electrically activated water is pumped into the well before being spilled. 10190'73