Method for treating oil-producing layer and oil well equipment for implementing the method

Abstract

The group of inventions is intended for exerting wave influence on a productive formation during oil well operations. The method consists in that a process fluid is pumped through a delivery line (10) and into a formation, flowing via the central tube (8) of a packer (3) to a hydrodynamic generator (5), wherein a portion of the fluid flows via the generator with a resonator-converter (6) to the inlet of a device (4) for generating hydraulic pulses, and then passes via the mixing chamber of a jet pump (2) to the wellhead. A control system (15,16) sets a pressure / flow pumping mode which is within a range in which the vibrations of the generator and the fluid are harmonised in the well-formation system. Following a period of overbalance generation, a command from the control system initiates the necessary change in the pressure-flow parameters in the delivery line (10) and in the discharge line (9), in order to activate the jet pump (2). The overbalance mode is replaced by a mode of underbalance in the formation, which produces a backflow of fluid into the well from the formation. The fluid that flows from the formation enters the hydraulic device (4), continues via the packer (3) to the jet pump (2) and to the discharge line (9). All the while, fluctuations in the ongoing filtration characteristics of the formation environment are monitored and the regulating range of the pressure-flow characteristics of the fluid flow is adjusted with signal control being carried out by automated sensors.

Description

technical field [0001] The present invention relates to the oil and gas extraction industry and can be used in the process of enhancing oil well productivity and adjusting fluid profile and acceleration in the following situations, namely: the reservoir permeability is insufficient, and the oil well has not been fully utilized after drilling, so In cases where the voids and channels of the reservoir are volumetrically polluted by various types of residue and tar deposits. Background technique [0002] Known methods of treating oil formations are the injection of various process fluids-solvents and mineral reservoir formation converters into the formation, used as these process liquid-solvents and mineral reservoir formation converters are based on various chemical agents Solution (patent No. 2055983, Russian Federation, International Patent Classification No. E21B43 / 27, application date: on July 5th, 93, open date: March 10th, 96; Patent No. 2173383, Russian Federation, Inte...

AI Technical Summary

Problems solved by technology

However, it is not efficient enough to form new fractures and add new filter channels to cover all the crevices and volumes of the oil layer, especially in the case of decreased permeability and heterogeneous oil layers.

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