The way to influence the bottomhole formation zone

 

The invention relates to the field of oil and can be used for stimulation of oil to producing wells. How is the impact on the bottomhole formation zone and the borehole bottom alternating pulses of discharge and pressure. Discharge pressure from the well bottom zone of the cavity is pre-installed and purged in the well tubing column, equipped with a pulse generator. In the arrangement of the pulse generator includes a packer, a valve, indicating the bottom-hole zone of the well from the ring annular space, and a valve informing the bottom-hole zone of the well with the cavity of the tubing string. Ring annulus is separated from the bottom zone of the well packer of the pulse generator. The pulse discharge is performed by the discharge pressure from the well bottom zone of the hollow tubing of the column. Produce the offset tubing of the column down to close the valve, indicating the bottom-hole zone of the well from the ring annular space, and then opening the valve, indicating the bottom-hole zone of the well with the cavity of the tubing string. Pressure pulses downhole resinol columns to close the valve, informing the bottom-hole zone of the well with the hollow tubing of the column, and the valve is open, indicating the bottom-hole zone of the well from the ring annular space. Simplified technology impacts on the bottomhole formation zone. 3 Il.

The invention relates to methods of treatment of productive formations, for example, for the stimulation of oil to producing wells.

Known methods involving the generation of pressure pulses in the well or on the surface and transfer them through the bottom hole in the reservoir [1, 2, 3]. In all cases, to obtain pulses applied pump or compressor equipment.

Closest to the claimed method is processing bottom-hole formation zone that includes multiple depression-repressione impact, which is performed by axial movement of the pipe string by creating a series of direct and reverse hammer without respitrace well. The method involves the installation in the borehole and emptying of the pump-compressor columns with a mechanism for creating a depression-repressional exposure (pulse generator), which switch serial buchsteiner cylinder with conical grooves and rows of Windows and installed within the cylinder, three piston with radial holes. In addition, in the exposure process requires constant monitoring of the combination of Windows and radial holes.

The technical task of the invention is to simplify the technology impact on the bottomhole formation zone and the simplification used for interference.

The problem is solved in that when exposed to the bottomhole formation zone of alternating pulses of discharge and pressure being exerted by the discharge pressure from the well bottom zone of the cavity is pre-installed and purged in the well tubing column, equipped with a pulse generator, a lineup which includes the packer, the valve, indicating the bottom-hole zone of the well with the hollow tubing of the column, and the valve, indicating the bottom-hole zone of the well from the ring annular space, and pulse pressure on the borehole bottom of the fluid-filled circular annulus, separated from the bottom zone of the well packer of the pulse generator, the pulse discharge, performed by the discharge pressure from the well bottom zone of the hollow tubing of the column produced by the offset mentioned tubing columns down d then valve informing the bottom-hole zone of the well with the cavity of the tubing string. When this pressure pulses to the borehole bottom of the fluid-filled circular annulus produce prapadyeta mentioned tubing of the column to close the valve, indicating the bottom-hole zone of the well with the hollow tubing of the column, and the valve is open, indicating the bottom-hole zone of the well from the ring annular space.

The invention is illustrated by drawings, where Fig.1 schematically shows well prepared for the surge effects on the bottomhole zone of the formation; Fig.2 and 3 - position valves upon receipt of the pulse discharge and pulse pressure.

To impact the bottom-hole formation zone of alternating pulses of discharge and pressure of the well 1 is equipped tubing column 2 with the pulse generator. In the layout generator includes a packer 3, a valve 4 for the message of the bottomhole zone 5 wells 1 with the hollow tubing of the column 2 and the valve 6 for the message of the bottomhole zone 5 with the annular annular space 7.

Tubing column can be equipped with a Shoe 8 for the support on the bottom or anchor the hollow tubing of the column tube and the annular space, can be performed by analogy with the valve site layout of the formation tester (IPT) containing egalitarian and intake valves [5], or any other design that meets these requirements.

Tubing column 2 is installed in the well is dry or blown after installation.

To obtain pulse discharge tubing column unload. At offset columns down first closes the valve 6, indicating the bottom-hole zone of the well from the ring annular space, and then opens the valve 4, indicating the bottom-hole zone of the well with the hollow tubing of the column 2. Is the discharge pressure of the bottom zone 5 wells in the tubing of the column (Fig.2).

After that, the column is lifted (load) first closes the valve 4, and then opens the valve 6. Fluid from the annular annulus 7 is supplied under pressure in the bottomhole zone of the borehole, generating it the pressure pulse (Fig.3).

After equalization of pressure in the annular space and at the bottom of manipulation of the tubing column is repeated, generating bottom-hole zone of the well the next pulse discharge and pressure.

the Viy at him, resulting in improved reservoir properties of the formation and the mobility of the formation fluid.

Sources of information

1. USSR author's certificate No. 184208, IPC E 21 B, 1966.

2. USSR author's certificate No. 1538590, MKI6E 21 IN 43/00, 1997.

3. RF patent №2151280, MKI7E 21 IN 43/25,1999.

4. USSR author's certificate No. 1739699, MKI6E 21 IN 43/25,1995.

5. Shakirov A. F. Logging, testing, perforation, and the torpedoing of the wells. - M.: Nedra, 1987, S. 48-49, Fig. 21.

Claims

The way to influence bottom-hole formation zone of alternating pulses of discharge and pressure being exerted by the discharge pressure from the well bottom zone of the cavity is pre-installed and purged in the well tubing column, equipped with a pulse generator, a layout which includes a packer, a valve, indicating the bottom-hole zone of the well with the hollow tubing of the column, and the valve, indicating the bottom-hole zone of the well from the ring annular space, and pulse pressure on the borehole bottom of the fluid-filled circular annulus, separated from the bottom zone of the well packer of the pulse generator, characterized in that asarnoj columns, produce the offset mentioned tubing of the column down to close the valve, indicating the bottom-hole zone of the well from the ring annular space, and then opening the valve, indicating the bottom-hole zone of the well with the hollow tubing of the column and the pressure pulses to the borehole bottom of the fluid-filled circular annulus produce prapadyeta mentioned tubing of the column to close the valve, indicating the bottom-hole zone of the well with the hollow tubing of the column, and the valve is open, indicating the bottom-hole zone of the well from the ring annular space.

 

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