RU2293177C1 - Method for outfitting a filter well - Google Patents

Abstract

FIELD: technology for extracting product from well.

SUBSTANCE: in accordance to method, product and auxiliary wells are drilled. Wells are outfitted with filtration columns, extracting and forcing equipment with blocking means. In accordance to invention extracting equipment is provided with blocking means. Upper extracted bed is isolated from lower productive bed. With extraction of productive bed, extracting and forcing equipment is lowered respectively into product and auxiliary wells.

EFFECT: increased formation extraction efficiency.

2 dwg

Description

The invention relates to techniques and technology for producing a product from a well, namely, producing a fluid, and can be used to develop mineral deposits by underground leaching.

There is a method of filter well equipment [1], which consists in opening a producing formation of producing well equipment, drilling auxiliary wells, hydraulic washing of the formation by pumping liquid under pressure and pumping gravel.

The known method is intended for the construction of exploratory wells primarily for water supply.

The disadvantage of this method is the need for high power consumption of pumping equipment to ensure hydraulic washing of the formation by pumping liquid of a high pressure carrier simultaneously over the entire power of the opened productive horizon.

In addition, the use of the method in multilayer reservoirs of production products is not effective due to the uncertain location of eroded caverns and channels relative to each productive interval.

There is also a method of filtering well equipment, which consists in drilling production and auxiliary wells with pumping and injection equipment with blocking means [2].

The known method is intended for the extraction of methane from a multilayer coal deposit.

The objective of the present invention is to increase the efficiency of field development by ensuring the full operation of the reservoir.

This problem is solved by the fact that the pumping and injection equipment, as the level of the reservoir is triggered, is lowered respectively into the production and auxiliary wells.

In addition, the pumping equipment is equipped with a blocking means.

The invention is illustrated in figures 1 and 2.

The method is implemented as follows. Drilling production 1 and auxiliary 2 wells. Spend geophysical work. Install the filter columns 3, 4. Spend the filling of gravel packing.

After washing the well, pumping equipment 5 with blocking means 6 is installed in production well 1 and injection equipment 8 in auxiliary wells 2 directly above the producing formation.

Through the injection equipment 7 auxiliary wells 2 produce the leaching reagents, and through the pumping equipment 5 of the producing well 1 is the selection of productive solution.

In this case, as the level of the reservoir is triggered, which may be indicated by a decrease in the concentration of the reservoir, injection and pumping equipment are lowered into the wells, and blocking means separate the upper worked from the lower reservoir.

The descent of the discharge and pumping equipment with the simultaneous supply of leaching reagents and pumping of the productive solution is continued until the level of the reservoir is fully activated.

The technical result is an increase in the efficiency of field development due to the complete actuation of the reservoir.

An example of the method

The construction of production and auxiliary wells in section No. 1 with a depth of 200 m.

The sequence of technological operations is as follows:

- drilling a production well with a diameter of 300 m;

- drilling auxiliary wells with a diameter of 200 m;

- conducting geophysical surveys, establishing the roof and sole of the reservoir;

- launching production casing ⌀ 90/18 mm with casing filters ⌀ 118 mm;

- flushing wells;

- filling gravel packing;

- washing with airlift;

- equipping wells with pumping and injection equipment equipped with blocking means;

- installation of pumping and discharge equipment directly above the reservoir. The supply of leaching reagents through the discharge equipment with the simultaneous selection of the productive solution;

- descent of pumping and injection equipment into the wells as the level of the reservoir is triggered.

Information sources

1. USSR author's certificate No. 170976, B 21 B 43/08, 01/30/92.

2. RF patent No. 2228435, E 12 V 43/04, 05/10/2004.

Claims (1)

A method of filtering well equipment, which consists in drilling production and auxiliary wells, equipping with filter columns, pumping and injection equipment with blocking means, characterized in that the pumping equipment is equipped with blocking means, disconnecting the upper worked formation from the lower producing formation and as the level of the producing formation responds pumping and injection equipment is lowered respectively into production and auxiliary wells.

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