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Device and method for removing deep blockage of loose sandstone through directional low-frequency sound waves

A low-frequency sound wave and blocking removal technology, which is applied in vibration generating devices, earth-moving drilling, wellbore/well components, etc., can solve the problems of difficult directional propagation of sound waves, long wavelength, obvious diffraction effect, etc., to solve the blockage of mud and sand particles , easy operation, wide application prospects

Pending Publication Date: 2022-07-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Due to the long wavelength of low-frequency sound waves, the diffraction effect is obvious, and it is difficult to achieve directional propagation of sound waves using different sound sources

Method used

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  • Device and method for removing deep blockage of loose sandstone through directional low-frequency sound waves
  • Device and method for removing deep blockage of loose sandstone through directional low-frequency sound waves
  • Device and method for removing deep blockage of loose sandstone through directional low-frequency sound waves

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0041] like figure 1 A directional low-frequency sound wave generating device shown includes a wellhead control device and a downhole directional low-frequency sound wave generating device, the wellhead control device and the downhole directional low-frequency sound wave generating device are connected by armored cables 4, and the wellhead control device includes a ground control instrument 1. And the ground sensor 2, the ground controller 1 is used to adjust the operating frequency and power, and is transmitted to the downhole low frequency generating device through the armored cable 4, so that the sound wave sent by the downhole low frequency generating device resonates with the blocking mud sand 12 of the far well reservoir; The dow...

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Abstract

The invention discloses a directional low-frequency sound wave plug removal device and an application method.The plug removal device comprises a wellhead control device and an underground directional low-frequency sound wave generation device, and the wellhead control device comprises a ground control instrument and a ground sensor; the underground directional low-frequency sound wave generating device comprises an instrument connector, a magnetic positioning instrument, a test sensor, a low-frequency electric signal generating device, a power amplifier and a sound wave transducer; the implementation method comprises the following steps: 1, selecting a blockage removal well and an adjacent well; 2, determining the setting depth of the device; 3, equipment installation; 4, adjusting parameters; 5, starting the directional low-frequency sound wave plug removal device; 6, starting the directional low-frequency sound wave plug removal device of the adjacent well; and 7, detecting the yield of the construction well. The directional function is achieved for low-frequency sound waves, the problems that in the past, the low-frequency sound waves are long in transmission distance but small in energy intensity are solved, the sound wave action intensity between construction wells is increased through a multi-wave interference method, and the purposes of relieving unconsolidated sandstone far-well reservoir mud and sand blockage and improving the recovery efficiency are achieved.

Description

technical field [0001] The invention belongs to the technical field of reservoir stimulation and stimulation, and in particular relates to a device and a method for releasing deep blockage of loose sandstone by directional low-frequency sound waves. Background technique [0002] With the continuous deepening of oil and natural gas development in my country, unconventional oil and gas reservoirs such as loose sandstone and low permeability have become an important potential for the development of the oil industry. Among them, in the development process of unconsolidated sandstone gas reservoirs, the problem of mud sand plugging in the deep wells of the reservoir has the greatest impact on the gas field production. So far, the use of physical, chemical and biological methods for decontamination and blockage removal, fracture creation, and permeability enhancement can only have a certain effect on the wellbore and the area near the wellbore, but it is very effective for mud san...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/00E21B28/00
CPCE21B37/00E21B28/00Y02A90/30
Inventor 王富华张志豪王路一孙泽壮张卫东时贤葛永召
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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