
基本信息:
- 专利标题: 含CO2油气井用泡沫缓蚀剂
- 专利标题(英):Foam inhibitor for CO2-containing oil-gas well
- 申请号:CN201710804316.X 申请日:2017-09-08
- 公开(公告)号:CN107384355A 公开(公告)日:2017-11-24
- 发明人: 刘大伟 , 魏臣兴 , 刘全稳 , 刘艳艳 , 胡罡 , 马明 , 蔡俊男
- 申请人: 广东石油化工学院
- 申请人地址: 广东省茂名市官渡二路139号大院
- 专利权人: 广东石油化工学院
- 当前专利权人: 广东石油化工学院
- 当前专利权人地址: 广东省茂名市官渡二路139号大院
- 代理机构: 茂名市穗海专利事务所
- 代理人: 李好琚
- 主分类号: C09K8/54
- IPC分类号: C09K8/54
The invention discloses a foam inhibitor for a CO2-containing oil-gas well which is used for preventing CO2 from corroding oil-gas-well pipe columns in the processes of water discharge of a CO2 drilling stratum, CO2 injection for improving the oil-gas recovery ratio and CO2 heat exchange (hot dry rock or geothermal exploitation). The foam inhibitor comprises the following components: 100 ml of deionized water, 1-2 ml of an acid foaming agent, 0.05-0.1 g of an acid-resistant foam stabilizer, 0.025-0.05 g of a corrosion inhibition main agent and 0.02-0.05 g of a corrosion inhibition auxiliary agent, wherein the acid foaming agent is a mixture of fatty alkyldime thylamine oxides, ammonium sulfate lauric acid and glycerol; the acid-resistant foam stabilizer is a mixture of xanthan gum and dodecyl dimethyl benzyl ammonium chloride; the corrosion inhibition main agent is a mixture of quaternary ammonium bis-imidazoline, isopropanol, aminoethyl acid, diglycolamine, potassium iodide and ethyl alcohol; and the corrosion inhibition auxiliary agent is thiourea. The foam inhibitor is strong in applicability, good in water solubility and high in inhibition rate.