Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method and device for producing hydrates by combining pressure reduction and hydraulic fracturing technology

A hydraulic fracturing and hydrate technology, which is applied in the fields of mining fluids, earth drilling, underground mining, etc., can solve the problems of unformed natural gas hydrates, etc., and achieve control of mining speed and changes in reservoir permeability, low mining costs, The effect of mature technology

Active Publication Date: 2016-02-24
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, an economical and effective large-scale commercial exploitation of natural gas hydrate has not been formed, and it is difficult to achieve real commercial exploitation by using only one mining method in the known methods. The advantages of different methods must be combined to learn from each other. In order to achieve the purpose of economical, efficient and safe commercial exploitation of natural gas hydrate reservoirs, and benefit mankind

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method and device for producing hydrates by combining pressure reduction and hydraulic fracturing technology
  • A method and device for producing hydrates by combining pressure reduction and hydraulic fracturing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] as attached figure 1 As shown, first, a production well 12 is constructed above the underlying sediment layer 1 of the gas hydrate, so that it runs through the gas hydrate reservoir 2, the overlying sediment layer 11 of the gas hydrate, and the seawater layer 13. In the production well 12 The sand filter device 17 and the reservoir in-situ gas-liquid separator 8 are arranged at the lower gas pumping part, and the flow valve 9 is arranged on the reservoir in-situ gas-liquid separator 8. At the same time, the fixed casing parts and the well wall of the production well 12 are arranged. The isolation equipment 10 is arranged in the wellbore of the production well 12 to arrange the dual wellbore casing string 14 for liquid injection / gas pumping and other functions, and the hydraulic pressure is set in the second section of the natural gas hydrate reservoir of the double wellbore casing string 14. Fracturing and perforating equipment, including a fracturing booster 5 and a je...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and a device for exploiting natural gas hydrate combined with depressurization and hydraulic fracturing technology. Through the design of double wellbore casing strings, the outer wellbore string is used to depressurize the natural gas hydrate in the reservoir, and the bottom of the inner wellbore string is used to detect and monitor the reservoir conditions. It is necessary to inject fracturing fluid into the reservoir for manual hydraulic fracturing operations to improve the permeability of the reservoir, ensure smooth fluid circulation channels and smooth gas production under pressure reduction. The method includes the following steps: constructing production wells, arranging double wellbore casing strings and related production and monitoring equipment; reducing pressure and decomposing natural gas hydrate; monitoring reservoir information and guaranteeing reservoir permeability by hydraulic fracturing technology ; gas and water collection output. The invention combines the advantages of depressurization method and hydraulic fracturing technology, and can grasp and feed back the change information of the reservoir in time while exploiting natural gas hydrate resources, so as to achieve economical, efficient and safe recovery of natural gas hydrate reservoirs. commercial mining purposes.

Description

technical field [0001] The invention relates to the exploitation technology of natural gas hydrate, in particular to a natural gas hydrate exploitation method and device combining depressurization and hydraulic fracturing technology. Background technique [0002] The problem of insufficient energy supply in my country has become increasingly prominent, and with the sustained and rapid development of the national economy, the degree of dependence on foreign oil and natural gas resources will continue to increase for a long period of time, and the regular fluctuations in international energy market prices As well as the challenges faced by energy transportation security, they will have a huge impact on the development of my country's national economy. Therefore, it is of great practical demand and strategic significance to explore other new clean alternative energy sources, ensure my country's future energy supply and energy security, and ensure the healthy development of my co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B43/295E21B43/26E21B43/40E21B49/00
CPCE21B41/0099
Inventor 李小森阮徐可黄宁生李刚张郁陈朝阳颜克凤
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products