江苏油田注水井套管软密封保护技术

H ermetic seal techno logy for water injection w ell
casing in Jiangsu O ilf ield

谢 军1 龙远强1 廉 冬1 白友国1 豆支冬2

X ie Jun, Long Yuanqiang, Lian Dong, e t al.

1. 江苏油田分公司试采一厂, 江苏江都225265; 2. 中原油田分公司采油五厂, 河南濮阳457001

( No. 1 Production Test P lant of Jiangsu
Oilfield Company, SINOPEC, Jiangdu 225265, China ),

A im ing at the ser ious corrosion o f the in jection w ell
cas ing, chem ical is used in som e certa in p lace of the tub ingcas
ing annu lus so as to fo rm an annu lar v iscoelastic sea l plug,
and a t the sam e tim e, the fitted aseptic and bac teric ide are
screened and then m ixed into the consequent casing protectiv e
flu id, wh ich can w ell pro tect the tub ing - casing annu lus.
Th is technology has the advantag es of sim ple operation, w ell
sea ling, long dura tion and m ulti- usag e( in cases o f cas ing
deform a tion w e lls). Th rough the field practice of 15 w e lls in 
Jiang su O ilfie ld, the success rate reached to 100%, wh ich
effectively reso lves the problem s of d ifficu lty o f an ti -
co rrosion in the process of w asted wa ter reinjection fo r tub ing
- casing space, decreases the corro sion speed of tub ing -
cas ing annulus and pro long s the usage o f the we ll casing