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A method of extracting shale gas

A technology for shale gas and shale gas exploitation, which is applied in the fields of fluid exploitation, earthwork drilling, wellbore/well components, etc., can solve the problems of restricting shale gas development and lack of effective exploitation of shale gas, etc.

Active Publication Date: 2015-08-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, my country still lacks methods for effective exploitation of shale gas, especially the unknown pressure distribution characteristics and production prediction of shale reservoirs, which directly restricts the efficient and reasonable development of shale gas

Method used

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  • A method of extracting shale gas
  • A method of extracting shale gas
  • A method of extracting shale gas

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Experimental program
Comparison scheme
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Embodiment Construction

[0062] The invention is tested in several shale reservoir test areas such as the xx gas field in the Sichuan Basin, all of which have received remarkable development effects, and can be fully exploited in the xx gas field. Taking the xxx test area of ​​xx gas field as example below, further illustrate the present invention in conjunction with accompanying drawing.

[0063] The following describes the basic formation parameters of shale gas reservoirs in the xxx test area. According to the measurement and experimental results, it can be known that the effective porosity Φ is generally distributed between 3% and 7%, with an average of 5%; the matrix permeability k is generally distributed in 4.1×10 -19 ~8.5×10 -19 m 2 , with an average of 6.3×10 -19 m 2 ; The reservoir thickness h is about 10m, and the average pore diameter of the reservoir matrix is ​​d pore About 1×10 -8 m, the gas layer temperature T is 383K, and the average formation pressure p e is 10MPa, gas viscosi...

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Abstract

The invention discloses a shale gas exploiting method which includes that a fractured horizontal well is utilized, an artificial fracture is formed by aid of the perforation technology, the area and the drainage radius of a control zone of the fractured horizontal well are determined through experimental exploiting, the gas volume flow in a control zone of the facture is accurately evaluated, and an effective and reasonable developing and producing system is formed to exploit shale gas reservoirs. The shale gas exploiting method is strong in feasibility and high in reliability, can be used for effective exploiting of shale reservoirs with different pore medium dimensions and formation pressures, defines the pressure distribution characteristics of the shale reservoirs, and has high economic benefit.

Description

technical field [0001] The invention relates to a shale gas mining method, in particular to a shale gas mining method based on gas diffusion phenomenon and non-Darcy flow characteristics in shale reservoirs. Background technique [0002] With the increasing shortage of oil and gas resources and the consideration of energy security, shale gas, an unconventional natural gas resource that can effectively relieve the world's energy pressure, has become one of the hotspots in world energy research, and its development and utilization are increasingly Get the attention of countries all over the world. [0003] However, shale reservoirs have poor physical properties, extremely low permeability, high technical requirements for development, and great difficulty. The development of shale gas in the world is still in the early stage. The United States has built a large-scale shale gas production capacity, while the development of shale gas in my country has not yet started, and the sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26
Inventor 朱维耀宋洪庆于明旭吴鹏邓佳
Owner UNIV OF SCI & TECH BEIJING