Condensate oil foam discharging agent applied to natural gas extraction

A technology of foam unloading agent and condensate oil, which is applied in the field of foam stabilizer, can solve the problems of reduced foaming ability and stability of foam unloading agent, and achieves the effects of good foam stability, strong foaming ability and reduced slip loss.

Active Publication Date: 2013-11-06
PETROCHINA CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more than ten kinds of foaming agents at home and abroad, which are suitable for different liquid-loaded gas reservoirs, but they are generally suitable for formations below 80°C and gas wells with low condensate oil content. As the oil content increases, the foaming abilit

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
  • Condensate oil foam discharging agent applied to natural gas extraction
  • Condensate oil foam discharging agent applied to natural gas extraction
  • Condensate oil foam discharging agent applied to natural gas extraction

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] Condensate oil foaming agent suitable for natural gas exploitation, the weight percentage of each component is: sodium petroleum sulfonate, 20%; 2-undecyl-N-hydroxyethyl-N-carboxymethyl imidazoline, 20% ; dodecyl sultaine fluorocarbon surfactant, 2%; nonionic polyacrylamide (8 million), 0.2%; water, 52.8%.

[0030] Preparation:

[0031] (1) At normal temperature and pressure, add 50% of the total weight of water to the reactor, then add foam stabilizer, non-ionic polyacrylamide, molecular weight 8 million, stir for 0.5 to 1 hour, then add the remaining 50% of water, Stir until uniform;

[0032] (2) Sodium petroleum sulfonate (anionic surfactant), 2-dodecyl-N-hydroxyethyl-N-carboxymethyl imidazoline (ampphoteric surfactant), dodecyl sulfobetaine Fluorocarbon (fluorocarbon surfactant) is added to the reaction kettle and fully stirred for 1 to 2 hours; a condensate oil foaming agent suitable for natural gas exploitation is obtained.

[0033] Compos...

Example Embodiment

[0037] Embodiment 2: the condensate oil foaming agent that is applicable to natural gas exploitation, each component weight percent is:

[0038]

[0039] Foaming agent preparation steps: the same as in Example 1.

[0040] Composition of water containing condensate:

[0041]

[0042] Pai Pai effect:

[0043]

Example Embodiment

[0044] Embodiment 3: the condensate oil foaming agent that is applicable to natural gas exploitation, each component weight percent is:

[0045]

[0046] Foaming agent preparation steps: the same as in Example 1.

[0047] Composition of water containing condensate:

[0048]

[0049] Pai Pai effect:

[0050]

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 condensate oil foam discharging agent applied to natural gas extraction. The condensate oil foam discharging agent is used for improving the extraction efficiency of natural gas rich in condensate oil. The condensate oil foam discharging agent comprises the following components in percentage by weight: 15 to 35 percent of anionic surfactant, 20 to 30 percent of amphoteric surfactant, 2 to 5 percent of fluorocarbon surfactant, 0.2 to 0.3 percent of foam stabilizer and the balance of water. A production process is simple, the condensate oil foam discharging agent is convenient to use, and can be used immediately after being added, the shelf life of the condensate oil foam discharging agent is as long as more than 6 months, and the market price of the condensate oil foam discharging agent is only 1/3 of that of a like imported product. The condensate oil foam discharging agent is powerful and special for resistance to condensate oil, and has a liquid carrying rate of over 90 percent, higher resistance to high salinity and higher high-temperature resistant capability. The product is proven by trial in the China national offshore oil corporation and the Changqing oilfield in China to have stable performance, and has broad application prospect, and the long-standing production interruption problems of well killing, dead well and the like caused by the accumulation of the condensate oil in the natural gas extraction can be solved.

Description

technical field [0001] The invention relates to the technical field of foam stabilizers, in particular to a condensate oil foaming agent suitable for natural gas exploitation. Background technique [0002] At present, the foam drainage gas recovery process has the advantages of less investment, low cost, quick effect, easy implementation and no influence on the normal production of gas wells, so it is widely used. In 1980, the Sichuan Gas Field conducted the first water-bearing gas well foam drainage gas recovery test, and the economic and social benefits were very significant. [0003] In the later stage of development of condensate gas wells, due to the large formation pressure drop and large ground exposure pressure difference, the fluid accumulation in the wellbore seriously affects the productivity and leads to high abandonment pressure and low ultimate recovery rate. Liquid drainage and gas recovery are necessary means for later development. Therefore, it is of great ...

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): C09K8/584
Inventor 洪鸿李强刘帮华田喜军胡均志刘小江王磊徐勇刘鹏李耀武浩张玉华丁峰宋渊娟燕永利
Owner PETROCHINA CO LTD
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