| abstract |
The invention provides a lactic acid-like deblocking agent for deblocking heavy oil wells and its application. Wherein, by weight percentage, the plugging agent comprises: sorbitan tristearate, sorbitan oleic acid monoester polyoxyethylene ether, ethylene glycol tert-butyl ether, hydrochloric acid, polyvalent organic carboxylic acid, Fluoride salt, imidazoline corrosion inhibitor, drainage aid, clay stabilizer, iron ion stabilizer, antacid slag agent, water. The present invention also provides the application of the above-mentioned plug removing agent in the deep plug removing construction of heavy oil wells. The plug-relieving agent provided by the invention can realize effective deep plug-removal of the formation, relieve the operation pollution and organic and inorganic plugging of heavy oil wells, has remarkable effect, and can quickly restore the productivity of heavy oil wells. |