Petroleum Science >2013, Issue 1: 134-138 DOI: https://doi.org/10.1007/s12182-013-0260-y
Study of asphaltene deposition from Tahe crude oil Open Access
文章信息
China University of Petroleum, Beijing 102249, China; Key Laboratory of Shale Gas Exploration, Ministry of Land and Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China;China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China; Northwest Oilfield Branch Engineering and Technology Institute of Sinopec, Urumchi 830011, China;Northwest Oilfield Branch Engineering and Technology Institute of Sinopec, Urumchi 830011, China;China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China
文章摘要
the Tahe Oilfield, Xinjiang, China. This study has investigated the influences of crude oil compositions,
temperature and pressure on asphaltene deposition. The asphaltene deposition trend of crude oil was
studied by saturates, aromatics, resins and asphaltenes (SARA) method, and the turbidity method was
applied for the first time to determine the onset of asphaltene flocculation. The results show that the
asphaltene deposition trend of crude oil by the turbidity method was in accordance with that by the SARA
method. The asphaltene solubility in crude oil decreased with decreasing temperature and the amount
of asphaltene deposits of T739 crude oil (from well T739, Tahe Oilfield) had a maximum value at 60°C. From the PVT results, the bubble point pressure of TH10403CX crude oil (from well H10403CX,
Tahe Oilfield) at different temperatures can be obtained and the depth at which the maximum asphaltene
flocculation would occur in boreholes can be calculated. The crude oil PVT results showed that at 50, 90
and 130° C, the bubble point pressure of TH10403CX crude oil was 25.2, 26.4 and 27.0 MPa, respectively.
The depth above which asphaltene deposition inhibitors are required TH10403CX was determined to be
2,700 m.
关键词
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Onset of asphaltene flocculation, turbidity method, crude oil composition, temperature, bubble point pressure, borehole