A Method of Using Controllable Shock Wave to Put Gas Well into Production

A technology of shock wave and gas well, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc. It can solve the problems of reducing production efficiency, great difference in physical characteristics, increasing mining difficulty and mining cost, and avoiding pollution and damage, a large radius of action, and a wide range of transformation effects

Active Publication Date: 2021-11-30
西安诚科石油工程技术服务有限公司 +1
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Problems solved by technology

[0005] Because the controllable shock wave technology requires a strong pulse current, it usually occurs that after multiple pulse discharges, the power supply cannot continue to provide enough power, which increases the difficulty and cost of mining, and greatly reduces the mining efficiency. All previous efforts will be wasted due to the interruption of the impact
In addition, because natural gas reservoirs are generally rocks, and coalbed methane reservoirs are coal; the physical properties of rocks and coal are very different, resulting in the method for mining gas is not suitable for mining natural gas, so none of the prior art The precedent of using controllable shock wave to put gas well into production

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  • A Method of Using Controllable Shock Wave to Put Gas Well into Production
  • A Method of Using Controllable Shock Wave to Put Gas Well into Production
  • A Method of Using Controllable Shock Wave to Put Gas Well into Production

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0027] 1. Test the gas saturation of the reservoir

[0028] It is generally believed that the framework of the reservoir is incompressible, and the fluid in it is compressible. Under the action of the invasion pressure difference, the elastic fluid in the reservoir is compressed, and a certain volume is squeezed out to be filled by the mud filtrate to form an invasion zone, which can be calculated according to the following empirical formula:

[0029]

[0030] Among them, r is the invasion radius of the invasion zone, R is the outer boundary radius of the invasion zone pressure differen...

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Abstract

This application relates to a method for putting gas wells into production by using controllable shock waves. Rod and shatter, start the pusher and use the push rod to lower the shatter to the deepest working depth in the operation hole; start the energy converter of the shatter to release the shock wave, and after reaching the set number of impacts, lift the shatter to The second operation depth releases the shock wave to reach the set number of shocks; and so on; after the completion of the entire wellbore operation, the push rod and the shaker are pulled out, and the gas production string with drainage function is lowered to prepare for the subsequent drainage and gas production. Ensure the continuous production of gas wells.

Description

technical field [0001] The application relates to a method for putting gas wells into production by using controllable shock waves, which is applicable to the technical field of underground natural gas exploitation. Background technique [0002] Natural gas has the characteristics of low density, high buoyancy, small molecules, low viscosity, small adsorption capacity, and strong diffusion, so the percolation and diffusion through micropores are strong. This makes the sealing ability of the caprock play an important role in the accumulation, preservation and accumulation of natural gas. At the same time, the requirements of natural gas on the caprock are much stricter than those of oil. In my country's proven natural gas reservoirs, clastic rocks and carbonate rocks account for the vast majority, and are the focus of natural gas reservoir research. Clastic reservoirs have strong heterogeneity, complex pore structure, low primary porosity, mainly secondary pores, and unconve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B28/00E21B43/20
CPCE21B28/00E21B43/20E21B43/26
Inventor 李跃刚刘美娟上官丰收张硕
Owner 西安诚科石油工程技术服务有限公司
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