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Integrated method of hydraulic jet radial drilling and fracturing

A technology of radial drilling and hydraulic jetting, which is used in the production of fluids, earthwork drilling, wellbore/well components, etc. It can solve the problems of poor connectivity of original pores, limited communication efficiency of branch holes, and strong reservoir heterogeneity. and other problems to achieve the effect of increasing the control area

Active Publication Date: 2017-02-15
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, if the reservoir structure is severely damaged, the heterogeneity of the reservoir will be strong, and the connectivity of the original pores will become poor. Due to the small radial pores, the vertical communication efficiency will be low, which will greatly limit the communication efficiency of the branch pores.

Method used

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  • Integrated method of hydraulic jet radial drilling and fracturing
  • Integrated method of hydraulic jet radial drilling and fracturing
  • Integrated method of hydraulic jet radial drilling and fracturing

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Embodiment Construction

[0025] The present invention proposes an integrated method of hydraulic jet radial drilling and fracturing in oil and gas reservoirs, and forms a supporting construction scheme, which provides an effective technical means for oil and gas, especially unconventional oil and gas reservoir exploitation, and overcomes the The shortcomings of conventional hydraulic fracturing that cannot form stable long fractures and the low communication rate of radial drilling are of great significance for the industrial exploitation of unconventional oil and gas reservoirs. The specific embodiment of the present invention will now be described with reference to the accompanying drawings.

[0026] Unconventional oil and gas reservoirs are low-permeability reservoirs, characterized by low permeability, low porosity, and strong heterogeneity. It worked. The patent of the present invention requires that when developing unconventional oil and gas reservoirs, according to factors such as geological c...

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Abstract

The invention relates to a hydraulic jet radial drilling and fracturing integrating method. According to the working principle, a plurality of radial holes of a certain length are drilled with a vertical or horizontal shaft in a reservoir as a center, fracturing is carried out in the radial holes, and a network composed of cracks of different sizes is formed finally. The hydraulic jet radial drilling and fracturing integrating method can greatly increase controlled reserves of a single shaft, hydraulic fracturing can form the complete crack network in the reservoir under induction of the radial holes, the crack network can largely increase movement speed of fluid in the reservoir, industrial capacity is formed, and accordingly the purpose of largely improving the yield of the single shaft is achieved.

Description

technical field [0001] The invention relates to the field of oil and natural gas exploitation, and is a new type of high-efficiency oil and natural gas development technology means, especially capable of forming a "highway network" type large-scale reservoir in unconventional oil and gas reservoirs (such as reservoir gas and shale gas) with natural fractures. Scale crack network. Background technique [0002] With the rapid growth of my country's economy, my country's energy demand has grown rapidly. In 2013, my country's foreign dependence on oil and natural gas reached 58.1% and 31.6%, respectively, and China has become the third largest natural gas consumer in the world. Unconventional oil and gas resources, such as tight gas, shale gas, reservoir gas, tight oil and other unconventional oil and gas, are an important supplement to conventional oil and gas resources. The new favorite in the oil market. Research shows that China is rich in unconventional oil and gas resour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/11E21B43/17
Inventor 李根生黄中伟田守嶒王海柱付宣李敬彬
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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