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Method and device for enhancing effect of unconventional oil and gas pulse resonance

An unconventional, oil and gas technology, used in vibration generating devices, earth-moving drilling, and production fluids, etc., can solve the problems of poor shale oil and gas fluidity, poor tight oil and gas effect, etc. rift effect

Pending Publication Date: 2020-04-21
龚大建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the embodiment of the present invention provides a method and device for unconventional oil and gas pulse resonance enhancement to solve the problem in the prior art due to the poor fluidity of shale oil and gas in tight reservoirs, the use of horizontal drilling and large-scale hydraulic pressure The problem that cracks are less effective in the development of tight oil and gas

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  • Method and device for enhancing effect of unconventional oil and gas pulse resonance
  • Method and device for enhancing effect of unconventional oil and gas pulse resonance
  • Method and device for enhancing effect of unconventional oil and gas pulse resonance

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Embodiment 1

[0031] An unconventional oil-gas pulse resonance enhancement device, such as Figure 1-4 As shown, it includes a plurality of wells set on the ground and casings 1 set in the wells. One horizontal well platform is generally equipped with 4-6 wells, and the outer wall of the casing 1 is fixedly attached to the well wall of the well. The casing 1 is provided with a striking mechanism for striking the inner wall of the casing 1 to send vibration waves into the shale, and the frequency at which the striking mechanism strikes the inner wall of the casing 1 is the same as the natural frequency of the shale. When developing shale gas in shale formations, the casing 1 can be tapped with a tapping mechanism to send vibration waves into the shale formations, thereby increasing the cracks and micro-cracks in the shale formations and increasing their penetration properties, so that its physical properties can be improved so that the shale gas in it can be exploited.

[0032] The casing 1...

Embodiment 2

[0043] A method for increasing the efficiency of unconventional oil-gas pulse resonance, comprising the following steps:

[0044] S1, first use the motor 31 to drive the cam to rotate so that the knock rod 23 knocks the casing 1, and during the knocking process, a vibration wave will be sent into the layer shale, and then the acceleration sensor 41 is used to receive the vibration wave signal reflex acceleration;

[0045] S2, changing the rotational speed of the motor 31 sequentially, so that the knocking rod 23 knocks the inner wall of the casing 1 at different knocking frequencies, and when the acceleration sensor 41 receives different knocking frequencies, the vibration wave signal reflects Acceleration, and then determine which tapping frequency has the largest reflection acceleration, so as to determine the natural frequency of the layer shale;

[0046] S3, determine the rotational speed of the motor 31 according to the tapping frequency when the reflection speed is the ...

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Abstract

The embodiment of the invention discloses a method and device for enhancing the effect of unconventional oil and gas pulse resonance, and belongs to the technical field of shale gas exploitation devices. The technical scheme is as follows: the device comprises a plurality of bored wells arranged on the ground and casings arranged in the bored wells, the outer walls of the casings are fixedly attached to well walls of the bored wells through well cementation cement, and each casing is internally provided with a knocking mechanism for knocking the inner wall of the casing so as to emit vibrationwaves into layer shale. The frequency of knocking the inner walls of the casings by the knocking mechanisms is the same as the natural frequency of a target layer, so that the problem that in the prior art, due to poor fluidity of shale oil and gas in a compact reservoir, the effect of utilizing horizontal drilling and large-scale hydraulic fracturing for compact oil and gas development is poor is solved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of shale gas exploitation devices, and in particular to a method and device for unconventional oil and gas pulse resonance enhancement. Background technique [0002] Shale gas is a kind of unconventional natural gas, which refers to the natural gas that mainly exists and is enriched in the adsorbed and free states in organic-rich shale and interlayers. [0003] Shale gas does not form traps similar to conventional oil and gas. It has the characteristics of self-generation and self-storage, weather-water interface, large-area low-abundance continuous accumulation, low porosity, and low permeability. There are locally enriched sweet spots, and generally no Natural production or low production, horizontal wells and large-scale hydraulic fracturing are required for economical production. The formation and enrichment of shale gas has its own unique characteristics, and it is often distr...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B28/00
CPCE21B43/26E21B28/00
Inventor 龚大建于晓荣
Owner 龚大建