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- Title
基于γ-Al<sub>2</sub>O<sub>3</sub>载体的高孔隙率Ni-Mo催化剂制备及催 化特超稠油降黏效果评价.
- Authors
袁成东; 刘磊; Il’dar R., IL’YASOV; 丁保东; 曹畅; 周晓冬; Mikhail A., VARFOLOMEEV
- Abstract
The ultra-heavy oil in Tahe oilfield is currently produced by mixing light oil with ultra-heavy oil in wellbore to reduce viscosity. However, the high ratio of needed light oils and abnormal fluid production caused by uneven mixing lead to an inefficient production with high cost. Based on the characteristic of high asphaltene content in Tahe ultra-heavy oil, a high-porosity Ni-Mo catalyst based on γ-Al2O3 carrier was synthesized using 1, 3-propanediol, ammonium paramolybdate, and nickel nitrate as raw materials. Its catalytic effect on viscosity reduction was evaluated. The results showed that the trilobal γ-Al2O3 catalyst carrier had a cylindrical pore structure. The pore diameter was mainly 5—11 nm. The Ni-Mo catalyst could reduce the viscosity (50 ℃) of ultra-heavy oil from 28 200 mPa·s to 298 mPa·s. The viscosity reduction rate was 98.94%. In addition, it could reduce the density of ultra-heavy oil from 1.0070 g/mL to 0.8724 g/mL. Simultaneously, the content of saturated hydrocarbon increased significantly, while the content of resin and asphaltene decreased significantly. The catalytic ex-situ upgrading technology for viscosity reduction combined with reinjection of upgraded oil into wellbore could effectively reduce the viscosity of ultra-heavy oil. The catalytic ex-situ upgrading had a good effect, which could effectively save light oil consumption and improve the production efficiency.
- Subjects
CATALYST supports; CATALYSIS; ALKANES; POROSITY; RAW materials; MOLYBDENUM
- Publication
Oilfield Chemistry, 2023, Vol 40, Issue 3, p503
- ISSN
1000-4092
- Publication type
Article
- DOI
10.19346/j.cnki.1000-4092.2023.03.019