Oil gas production increasing device and method based on liquid electric pulse shock wave injection increase and chemical agent injection increase

Abstract

The invention discloses an oil gas production increasing device and method based on combination of liquid electric pulse shock wave injection increase and chemical agent injection increase. The combination production increasing device is mainly composed of a well operating instrument 1, coiled tubing 2 and a liquid electric pulse shock wave emitter 3. According to the oil gas production increasingmethod, liquid electric pulse shock wave injection increase and chemical agent injection increase are combined for operation, shock wave operation is conducted on an oil gas well perforation sectionand rock strata nearby the oil gas well perforation section, perforation plugging objects are physically crushed, micro-cracks of the nearby rock strata are increased, and permeability is improved. Synchronously-injected chemical agents can be transmitted to the deeper rock strata under the effect of shock waves and meanwhile can better dissolve the viscous plugging objects under the disturbance effect of the shock waves, and permeability of the rock strata is improved. The operation steps are simple, the advantage of shock wave production increasing and chemical production increasing can be combined, the device and method are suitable for vertical and horizontal wells, the production increasing effect is remarkable, and the effective time of shock wave production increasing and chemical production increasing which are simplex in function effect is longer.

Description

technical field [0001] The invention belongs to the field of oil and gas exploitation technology, and more specifically relates to an oil and gas stimulation device and method based on the combination of hydraulic-electric pulse shock wave injection and chemical agent injection. Background technique [0002] During the production of oil and gas wells, non-permeable obstacles will be formed at the perforation of the pipeline, which will lead to a decrease in seepage capacity, thereby affecting production. Therefore, it is of great significance to carry out the research on oil well pipeline plugging removal and production increase technology to improve the production of oil and gas wells. [0003] At present, the existing plugging removal and production increase technologies can be divided into two categories: chemical plugging removal and physical plugging removal. Chemical plugging removal is mainly based on acidification, and the acidizing solution used also includes conve...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to propose an oil and gas stimulation device based on hydraulic pulse shock wave and chemical agent injection, aiming at solving the problem that existing oil and gas stimulation devices only use a single physical plugging or chemical solution. Technical problems caused by blockage and poor plugging removal effect

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