| DU Qing-zhen,XIE Gang,JIANG Wei-qi,YAN Xuan-qi,ZHU Ke-hua,WEI Ai-jun.Research and Application of High-temperature Corrosion and Scale Inhibitors for Oil Recovery[J],44(12):56-61,74 |
| Research and Application of High-temperature Corrosion and Scale Inhibitors for Oil Recovery |
| Received:October 28, 2015 Revised:December 20, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.12.009 |
| KeyWord:oil well corrosion scaling corrosion inhibition scale inhibition pump detection period |
| Author | Institution |
| DU Qing-zhen |
Production Engineering Research Institute of Huabei Oilfield Company, Renqiu , China |
| XIE Gang |
Production Engineering Research Institute of Huabei Oilfield Company, Renqiu , China |
| JIANG Wei-qi |
Production Engineering Research Institute of Huabei Oilfield Company, Renqiu , China |
| YAN Xuan-qi |
Production Engineering Research Institute of Huabei Oilfield Company, Renqiu , China |
| ZHU Ke-hua |
The Second Oil Production Facility of Huabei Oilfield Company, Bazhou , China |
| WEI Ai-jun |
Production Engineering Research Institute of Huabei Oilfield Company, Renqiu , China |
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| Abstract: |
| Objective To solve the problem of corrosion and scaling affecting the normal production in the high temperature oil well during the oilfield production by chemical corrosion technology. Methods The weight loss test and the capacity analysis experiment were carried out and the on-site analyses of water quality and scale samples were performed. The effects of different kinds of corrosion and scale inhibitors on the corrosion efficiency and scale efficiency were studied by orthogonal test at different additive amounts and different temperatures. Results Based on clarifying the causes of the corrosion and scaling of oil well, the HZG series of corrosion and scale inhibitors were developed composed of imidazoline derivatives and organic phosphonic acid salt with supplement of high temperature-resistant fluorocarbon imidazoline. The inhibition effect on scale and corrosion was great, the corrosion inhibition rate was above 90% and the scaling inhibition rate was above 95% , effectively alleviating the corrosion and scaling problem of well bore under the high temperature oil reservoir (greater than 100 ℃) , and the on-site applications achieved good effects in the testing of 10 wells, the average decreased rate of calcium ions reached 82% , the calcium ion concentration was also increased significantly, the average pump detection period extended 2. 2 times. Conclusion Addition of components of fluorocarbon Imidazoline could effectively improve the heat resistance of corrosion and scale inhibitors. On-site usage of HZG series of corrosion and scale inhibitors obtained great inhibition effect on corrosion and scale, and solved the corrosion and scale problems of the high temperature oil well. |
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