Method for detecting setting effect of packer in salt-cavern gas storage

A detection method and a packer technology, which are applied in the direction of measuring the increase and decrease rate of the fluid, and using the liquid/vacuum degree to measure the liquid tightness, etc., can solve the problem of not meeting the requirements of long-term safe operation of the underground gas storage in salt caverns, etc. problem, to achieve the effect of cost-effective and cheap

Active Publication Date: 2018-06-29
CHINASALT JINTAN
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the detection method of packer setting effect commonly used in the oil and gas industr

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
  • Method for detecting setting effect of packer in salt-cavern gas storage
  • Method for detecting setting effect of packer in salt-cavern gas storage
  • Method for detecting setting effect of packer in salt-cavern gas storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039]Example: After the injection-production casing 1 is run in and the well is washed, nitrogen is injected into the annulus 3, and the brine is pressed to 6 m below the set position of the packer 4 at 901.20 m, that is, 907.20 m. After the sealing pressure is 25MPa and the pressure is maintained for 30min, the setting of the packer 4 is completed, and then nitrogen is continuously injected into the annulus 3 for pressurization. The upper limit pressure of the salt cavern gas storage in this example is 17MPa. About 1.7MPa, so the wellhead pressure in the annular space 3 should reach 17MPa. After 2 hours, the gas-liquid interface detection equipment 5 is lowered into the injection-production casing 1 to detect the packer between the injection-production casing 1 and the production casing 2 The depth of gas-liquid interface 6 under 4 is 907.16m. At this time, the wellhead pressure of injection-production casing 1 is 0.2MPa, and the wellhead pressure of annular space 3 is 17MPa....

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 relates to a method for detecting a setting effect of a packer in a salt-cavern gas storage. The method comprises the following steps: 1) washing a well after tripping in an injection-production casing; 2) injecting nitrogen into an annulus between the injection-production casing and a production casing, pressurizing brine in the annulus to below a packer setting position; 3) after setting the packer, continuing to inject nitrogen into the annulus to pressurize so that an annulus pressure of the packer at least is 1.1 times greater than an upper limit pressure of the salt-caverngas storage; 4) tripping in a gas-liquid interface inspection device in the injection-production casing, and detecting a gas-liquid interface below the packer between the injection-production casing and the production casing; 5) detecting and recording the depth of the gas-liquid interface, the wellhead pressure of the injection-production casing and the annulus pressure; and 6) judging the setting effect of the packer according to change situations of the gas-liquid interface below the packer, the wellhead pressure of the injection-production casing and the annulus wellhead pressure. The method is strong in practicability, simple to operate, high in airtightness detection precision, and helpful for effectively verifying the setting effect of the packer, so as to prolong the life of the salt-cavern underground gas storage and ensure safe and effective operation of the same.

Description

technical field [0001] The invention relates to a detection method for the setting effect of a packer of a salt cavern gas storage. Background technique [0002] Salt cavern underground gas storage technology is a new type of natural gas storage technology. It reaches the salt layer or salt dome by drilling, and uses artificial water dissolution to form a cave storage space in the salt layer or salt dome to store natural gas. . Compared with surface gas storage technology, salt cavern underground gas storage has the advantages of small footprint, large storage capacity, and high safety performance. It has also begun to be used as a peak-shaving gas storage on a large scale in China, and has a good prospect. However, the airtightness of the salt cavern underground gas storage directly affects the service life and operation safety of the gas storage, and the setting effect of the packer plays an important role in the airtightness. If the setting effect of the packer in the s...

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
IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 任晓云陈留平徐孜俊马旭强赵云松
Owner CHINASALT JINTAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap