發(fā)布時間：2018-10-26 09:05

【摘要】：目的為了解決油田采出水的腐蝕問題,制備一種復(fù)合緩蝕劑,并研究環(huán)境因素對緩蝕性能的影響規(guī)律,為油田采出水的科學(xué)防腐提供理論上的依據(jù)。方法采用含磷咪唑啉季銨鹽和鎢酸鈉復(fù)配了一種綠色的油田采出水處理復(fù)合緩蝕劑,用動態(tài)失重法對復(fù)合緩蝕劑的緩蝕性能進(jìn)行了評價,并系統(tǒng)地研究了介質(zhì)的溫度、pH值、礦化度及流速對緩蝕性能的影響。結(jié)果油田采出水的溫度為55℃、pH值=7.0、流速為2.5 m/s和礦化度為36 g/L時,復(fù)合緩蝕劑的最佳投加質(zhì)量濃度為60 mg/L。該條件下Q235鋼的腐蝕速率為0.0269 mm/a,能夠滿足油田采出水回注的標(biāo)準(zhǔn)要求。腐蝕速率隨著緩蝕劑質(zhì)量濃度的增加而減小,隨著采出水溫度的升高而增大。采出水的礦化度為32 g/L時,對腐蝕速率的影響最大。采出水的流速為1.2~3.0 m/s和采出水的pH值接近于中性時,其對腐蝕速率的影響較小。結(jié)論復(fù)合緩蝕劑是一種環(huán)境友好型油田采出水處理緩蝕劑,緩蝕性能優(yōu)良。
[Abstract]:Objective in order to solve the corrosion problem of oilfield produced water, to prepare a compound corrosion inhibitor, and to study the influence of environmental factors on corrosion inhibition performance, to provide a theoretical basis for scientific anticorrosion of oilfield produced water. Methods A green compound corrosion inhibitor for oilfield produced water treatment was prepared by using phosphor imidazoline quaternary ammonium salt and sodium tungstate. The corrosion inhibition performance of the compound inhibitor was evaluated by dynamic weightlessness method, and the temperature and pH value of the medium were systematically studied. Effects of salinity and flow rate on corrosion inhibition performance. Results under the conditions of 55 鈩，

本文編號：2295233