The method of processing bottom-hole zone of the well

 

(57) Abstract:

The invention relates to the oil industry and can find application in the perforation, reperforation and other works associated with the treatment of bottom-hole zone of the well. Provides a more effective cleaning perforations. The inventive when processing bottom-hole zone wells are perforated wells, implosive effects and develop well. When implosive effects simultaneously produce one perforation perforation holes with the volume of the powder gases is insufficient to fill the implosion of the camera. At the same time shield the distribution of the powder gases in the implosion chamber for directing these gases, to a greater extent on the formation of the perforations. When this implosion effect is produced without the formation of a reverse shock wave.

The invention relates to the oil industry and can find application in the perforation, reperforation and other works associated with the treatment of bottom-hole zone of the well.

There is a method of bottom-hole zone of the well, including perforation of the well and implosive effect (Patent RF 2114984, CL E specialsa not completely. Closest to the invention to the technical essence is a method of processing bottom-hole zone of the well, including perforation of the well, implosive effects and development wells (RF Patent 2075593, CL E 21 In 43/117, published. 1997 - prototype).

The known method provides simultaneous perforation and the implosion of pollution perforations, however, the powder gases from the perforation partially penetrate into implosion chamber and reduce the effect implosion. In the cleaning of the perforations is insufficient. The invention solves the problem of increasing the efficiency of cleaning the perforations.

The task is solved in that in the method of processing bottom-hole zone of the well, including perforation of the well, implosive effects and develop well, according to the invention when the implosion effect simultaneously produce one perforation perforation holes with shielding distribution of the powder gases in the implosion chamber. Features of the invention are:

1) perforation of the well.

2) implosion effect;

3) development wells;

4) when the implosion effect simultaneous perforatio the camera.

Signs 1-3 are common with the prototype, signs 4-5 are the salient features of the invention.

The essence of the invention.

When perforation with simultaneous implosion of the inner cavity of the punch connected with the implosion of the camera. Powder gases from the cumulative perforating charges in addition to useful work on education perforations do negative work, reduce the effectiveness of implosion impact, partially filling implosion chamber. With a large number of shaped charges implosion chamber is filled completely, and implosive effect disappears. As a result, the efficiency of the method decreases dramatically. In the proposed method solves the problem of increasing the efficiency of cleaning the perforations. The problem is solved in the following way.

When processing bottom-hole zone of the well, including perforation of the well, implosive effects and develop well, with implosive effects simultaneously produce one perforation perforation holes with shielding distribution of the powder gases in the implosion chamber. Perforation of one sprocket holes are provided for the measures. This effect is formed perforation hole and almost fully implemented implosion effect. In addition, the shielding distribution of the powder gases from the shaped charge in eplosion the camera contributes to the direction of the gases to a greater extent on the formation of the perforations and to a lesser extent filling implosion chamber. Shielding distribution of the powder gases in the implosion chamber it is possible to achieve different design solutions. The most simple are hosted at the entrance to the implosion chamber perforated partitions, partitions in the form of a labyrinth, a partition with a small hole, etc. shielding delays the receipt of the powder gases in the implosion chamber, thereby facilitating their access to the well. After that, downhole fluid with dirt fills implosion virtually without formation of a reverse shock wave, contributing in a normal situation, the return of contamination in the perforations of the well.

The proposed method is useful for cleaning perforations made in advance of the usual perforation. Furthermore, the method may be itself the th zone of the production well depth 1680 m, discover oil layer thickness of 3 m Current well production rate is 4 tons/day. In the productive interval of the formation the well perforined 15 holes. For work gather the layout of underground equipment, consisting of a punch cumulative type and implosion of the camera. The hammer drill is equipped with 1 cumulative charge ZPK-105 C. the mass of the shaped charge is 23, the Outer diameter of the punch - 105 mm shaped charge provides depth drilled holes not less than 600 mm Implosion chamber is a pump-compressor pipe with a diameter of 73 mm, length 8 mm and an internal volume of 0.02 m3. The body punch connected with the drill pipe through the coupling with the partition wall having a hole diameter of 8 meters Layout of underground equipment placed on the borehole bottom. Trigger shaped charge and the simultaneous opening of the implosion chamber. The well is completed. After processing, the flow rate is equal to 7 tonnes. The application of the proposed method will allow you to punch well increase their productivity.

The method of processing bottom-hole zone of the well, including perforation of the well, implosive effects and development wells is participation with the volume of the powder gases insufficient to fill the implosion of the camera, and simultaneously shield the distribution of the powder gases in the implosion chamber for directing these gases, to a greater extent on the formation of the perforations, while the implosion effect is produced without the formation of a reverse shock wave.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: according to accelerated variant, perforation of well-adjacent bed zone is performed by cased cumulative perforator. Adjustable pulse gas-dynamic bed fracturing is performed through apertures of perforator. It is provided with subsequent operation in given time of delay of main and additional gunpowder chambers. Thermal gas-chemical effect on well-adjacent zone of bed is provided for in given delay time of thermal gas-chemical chamber with charges. Implosion treatment is performed in given delay time of implosion chamber. Treatment is set by volume of implosion chamber and size of pass cross-section of flow aperture and/or group of apertures, connecting inner volumes of chambers.

EFFECT: higher efficiency.

12 cl, 3 dwg

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