We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
川东石炭系低压气井解堵工艺研究与应用.
- Authors
叶颉枭; 张华礼; 李松; 王小红; 熊伟; 曾知昊
- Abstract
These are different degrees of wellbore blockage which affects productivity due to long time production in gas well of eastern Sichuan carboniferous formation. Perennial acidizing stimulation leads to the formation of large acid-corrosion channels around wellbore. The acid flowed away directly without any effect, resulting in poor acidification efficiency and short stable production period. The analysis shows that the blockages are mainly composed of iron oxide, carbonate. barium sulfate. silica, and lauryl alcohol polyether organics. The dissolution rate of the blockage removal acid solution to scale at formation temperature is up to 77.6% (15% HC1+1% corrosion inhibitor +2% iron stabilizer +3% surfactant). Specific blockage removal technologies are proposed for different blockage place, coiled tubing or tubing injection for tubing blockage removal. vacuum back position sand pumping process for casing blockage, the foam acidizing technology for formation plugging. Field tests were carried out in 6 wells, the effective rate was 100% which provides an effective technical means for blockage removal of low-pressure gas wells in this area and the same type.
- Subjects
SICHUAN Sheng (China); GAS wells; BARIUM sulfate; BARIUM carbonate; DODECANOL; ACID solutions; STEEL corrosion
- Publication
Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong, 2021, Vol 50, Issue 3, p71
- ISSN
1007-3426
- Publication type
Article
- DOI
10.3969/j.issn.1007-3426.2021.03.011