The tie-in of Ca Ngu Vang to Bach Ho oil field and experience of marginal oil fields tie-in with existing large oil fields
Abstract
Vietsovpetro has successfully tied in several marginal off shore oil fi elds (eg. Ca Ngu Vang, Nam Rong Doi Moi, Gau Trang and Tho Trang) to Bach Ho and Rong oil fields, which have completed infrastructure for oil and gas processing and storage [1]. Oil production from these marginal fields are modest, expectedly about 1,000 - 3,500 tons/day (6,200 - 20,000 BOPD). Crude oil produced from these fields has a high wax content (19 - 27%), high viscosity, and high pour point (36oC). The average seabed temperature surrounding the production pipeline is expected to be around 22 - 28oC and can reachas low as 21.8oC. The transportation of crude from the marginal oil fields to larger oil fields through subsea pipelines therefore encounters many difficulties due to thermal hydraulic problem and wax deposition inside the pipelines [2 - 4].
This paper presents the tie-in of Ca Ngu Vang to Bach Ho oil field and experiences in transporting crude from the tie-in fields through subsea pipelines. These will be the basis for Petrovietnam in general and Vietsovpetro in particular to put the marginal fields into production by using existing processing and storage infrastructure.
References
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