Ultrasonic blockage removal technology and blockage removal device
An ultrasonic and plugging-removing technology, which is applied to cleaning equipment, wellbore/well parts, earthwork drilling and production, etc., can solve problems such as complex chemical plugging removal construction, secondary pollution of reservoirs, environmental pollution, etc., and is convenient for large-scale promotion , increase oil production, safe and reliable construction
Inactive Publication Date: 2015-06-17
牛连江
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Problems solved by technology
The current plugging removal method mainly injects chemical agents into the reservoir to remove paraffin deposition by using chemical reaction heat and high solubility, and has achieved certain results with field application. However, chemical plugging removal is complicated and costly. secondary pollution risk
also pollute the environment
Method used
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[0037] Specific examples: 4 wells were tested in 2012, and the artificial coil cable was used for the downhole test. In May 2014, an ultrasonic blockage removal vehicle was used to remove the blockage, and 5 wells were tested to remove the blockage. The situation is as follows:
[0038] 1. Test situation in 2012
[0039] 1.1. Production status of the test well before the test
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The invention relates to an ultrasonic blockage removal technology and a blockage removal device which are used for clearing blockages formed in an oil well during oil extraction. The device is mainly composed of a well testing truck, a transmission cable, a high-power ultrasonic electric signal transmitter and an ultrasonic electro-acoustic transducer. High-power pulse electric oscillation signals generated by the vehicle-mounted high-power ultrasonic transmitter on the ground are transmitted to the piezoelectric ceramic electro-acoustic transducer on an oil layer through the special transmission cable, then converted into ultrasonic waves through the electro-acoustic transducer, and injected into an oil bearing formation, so that the physical property and flow state of fluid in the oil layer are changed, the circulating condition and permeability of the bottom of the well and a near-well oil layer are improved, blockages are removed, scale prevention and removal are achieved, paraffin control is achieved, oil production capacity is improved, the viscosity of crude oil is reduced, and then permeability and recovery efficiency can be improved, injection rate is increased, and injection allocation is achieved.
Description
technical field [0001] The invention relates to an ultrasonic blocking removal process and a blocking removal device used for cleaning blockages formed in oil and water wells during oil production. Background technique [0002] During the production of oil and water wells, due to the constant changes in reservoir temperature, pressure, water content and other conditions, it is necessary to destroy the thermodynamic equilibrium state of the reservoir, so that the paraffin in the reservoir fluid is precipitated and precipitated from the crude oil, and the injection of water impurities and injection polymerization Some blockages are formed in the oil well, which hinder the flow of crude oil into the wellbore, reduce the porosity and permeability of the reservoir, and affect the production of the oil well and the recovery factor of the oil field. The current plugging removal method mainly injects chemical agents into the reservoir to remove paraffin deposits by using chemical re...
Claims
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IPC IPC(8): E21B37/00
CPCE21B37/00
Inventor 牛连江胡守连
Owner 牛连江
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