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

Microwave step-down in-situ heating method for mining oil shale

A microwave heating, stepped technology, applied in the production of fluids, earthwork drilling, wellbore/well components, etc., can solve problems such as overheating, engineering problems, wellbore material failure, etc., to achieve high efficiency, improve efficiency, and meet temperature resistance. effect of demand

Active Publication Date: 2020-08-28
SOUTHWEST PETROLEUM UNIV
View PDF16 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, in the area of ​​microwave radiation, that is, the area close to the wellbore, there will be overheating, and the temperature will be too high, which will make the wellbore material fail, causing serious engineering problems

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
  • Microwave step-down in-situ heating method for mining oil shale
  • Microwave step-down in-situ heating method for mining oil shale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for in-situ heating and exploitation of oil shale by microwave step-down, comprising the following steps:

[0032] (1) A microwave heating well is set on the oil shale ore layer, and the microwave heating well is located at the center of the oil and gas outlet fracture;

[0033] (2) Set the upper limit value of the temperature sensor to 700°C, turn on the microwave source through the control room, the power of the microwave source is 800W, and continuously radiate the formation for 45 days. When the monitoring temperature reaches 680°C, reduce the power to 700W at this time , continue to radiate for 29 days, and the monitoring temperature reaches 678°C; at this time, reduce the power to 500W, and continue to radiate for 140 days, when the monitoring temperature reaches 679°C; at this time, reduce the power to 350W, continue to radiate the formation for 126 days, and then monitor The temperature reaches 656° C. (see Table 1 for specific steps).

[0034] Assumin...

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

A microwave step-down in-situ heating method for mining oil shale includes the following steps: (1) setting a microwave heating well on an oil shale ore layer, wherein the microwave heating well is located at the center of an oil and gas export crack; and (2) after a temperature sensor monitors that the temperature of the microwave heating well reaches the upper limit, reducing the microwave powerin a stepwise manner so as to radiately heat the oil shale ore layer, so that the generated oil and gas are exported through the oil and gas export crack. The method adopts the heating mode of step-down type microwave heating for oil shale, not only takes advantage of the easy control of microwave power, but also is a high-efficiency heating method with higher efficiency than an intermittent microwave heating mode.

Description

technical field [0001] The invention relates to the technical field of in-situ oil shale exploitation, in particular to a microwave step-down in-situ heating extraction method for oil shale. Background technique [0002] Oil shale is a kind of unconventional oil and gas resources. The organic kerogen contained in it needs to be converted into gas-liquid hydrocarbons by heating, which can be used as a substitute for conventional crude oil. The in-situ mining of oil shale can overcome the environmental pollution caused by open-pit mining and the problems of narrow mining range. Microwave heating has been proposed as an in-situ oil shale mining method due to its high heating efficiency, selective heating, and volumetric heating. [0003] At present, in the theory and technology of in-situ mining of oil shale by microwave heating, most of them assume that microwave heating of oil shale formation is continuous heating with constant power, and little attention is paid to the infl...

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 Applications(China)
IPC IPC(8): E21B43/24
CPCE21B43/24E21B43/2401
Inventor 杨兆中朱静怡李小刚王浩贾敏
Owner SOUTHWEST PETROLEUM UNIV
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com