| Autor: |
Jiahao Chao, Liang Zhang, Rong Feng, Zhiyuan Wang, Sudan Xu, Chong Zhang, Shaoran Ren |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Petroleum Research, Vol 5, Iss 4, Pp 315-325 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2096-2495 |
| DOI: |
10.1016/j.ptlrs.2020.07.003 |
| Popis: |
When both of the scaling and hydrate risks occur in deep-water wells or subsea pipelines at the same time, the compatibility between scale and hydrate inhibitors should be paid more attention to for the risk prevention. In this paper, a new deep-water gas field found in the South China Sea is taken as a reference of project background to investigate the compatibility between scale inhibitors and hydrate inhibitors experimentally. Firstly a preliminary qualification evaluation of scale inhibitors was carried out, in which the static scale inhibition efficiency, the scale induction time, and the minimum effective concentrations of the selected scale inhibitors were tested. Then the effect of commonly used thermodynamic hydrate inhibitor MEG (Mono Ethylene Glycol) on the anti-scaling performance of scale inhibitors was evaluated. MEG-resisted scale inhibitors were further optimized. Finally, an extended discussion on the compatibility of scale inhibition with hydrate inhibition was conducted. The experimental results showed that the scale inhibitors HPMA and MA/AA were recommended with the best working concentration of 30 ppm. The high-concentration inhibitors (30 wt%) can coexist with the same volume of pure MEG for more than 12–14 h at room condition and 60 °C without any precipitation. The anti-scale efficiency of inhibitor with 30 ppm concentration is still up to 90% even at the presence of 20 wt% MEG (after 2–4 h at 95 °C). Hence, in deep-water wellbore, compatible scale and hydrate inhibitors can be injected together using one chemical pipeline. Besides, it is also found that the polymer scale inhibitors generally have good compatibility with MEG. It deserves further studies and can be regarded as one direction for scale inhibitor improvement in the future. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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