| LI Jing-quan,SHI Li-hua,YANG Bin,KANG Jie.Harm of Hydrogen Sulfide and the Ways of Control in Oilfield Produced Water[J],45(2):65-72,78 |
| Harm of Hydrogen Sulfide and the Ways of Control in Oilfield Produced Water |
| Received:November 23, 2015 Revised:February 20, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.02.010 |
| KeyWord:oilfield produced water hydrogen sulfide sulfate reducing bacteria corrosion polymer degradation bacterial inhibition |
| Author | Institution |
| LI Jing-quan |
No. 1 Production Plant, Henan Oilfield, Nanyang , China |
| SHI Li-hua |
No. 1 Production Plant, Henan Oilfield, Nanyang , China |
| YANG Bin |
No. 1 Production Plant, Henan Oilfield, Nanyang , China |
| KANG Jie |
No. 1 Production Plant, Henan Oilfield, Nanyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The continuous increase of hydrogen sulfide (H2S) caused by the reproduction of sulfate reducing bacteria in the surface system is a troublesome issue commonly faced by those oilfields carrying out re-injection of produced water. This article gave a sketch of the harm of H2S and the common ways of removal in oilfields, and emphatically introduced three practical examples in the practice of Henan Oilfield. First, a common 2-stage aeration process, with an air-water ratio(v / v) of 1 : 2, was used in the treatment of the water for polymer preparation. The residual H2S was less than 1 mg/ L. Second, in another system, for the purpose of slowing corrosion, the common 1-stage aeration was used with a corrosion inhibiting bactericide to control corrosion. At an air-water ratio(v / v) of 1 : 7 to 1 : 10, the content of H2S was reduced from 50 ~60 mg/ L to 5 ~10 mg/ L, and the corrosion rate was reduced from 1 mm/ a to 0. 2 mm/ a when the 25 mg/ L inhibiting bactericide was added. Third, a new developed technique of solid catalyzed aeration, along with addition of a bacterial inhibitor, was applied to comprehensively remove the H2S and prevent it from reproduction in the water for polymer preparation. The thickness of H2S decreased from 25 mg/ L to 0. 5 mg/ L even when the air-water ratio(v/ v)was lowered to 1 : 1, and the increase of H2 S along the flow was less than 0. 5 mg / L with adding of a bacterial inhibitor. As a new sulfide removing technique, solid catalyzed aeration has many advantages over traditional aeration, such as lower air demand, more rapid and more complete removal of H2 S, etc. In systems where H2 S must be strictly limited, the combination of solid catalyzed aeration and bacterial inhibitor is more feasible than other common methods both technically and economically. |
| Close |
|
|
|