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Research on the Online Injection Technology of the Activated Polymer in Offshore Oilfield

Author: LiuNing
Tutor: LiZhaoMin
School: China University of Petroleum
Course: Oil and Gas Field Development Project
Keywords: Offshore oilfield Activated polymer Flow design Indoor physical simulation test
CLC: TE53
Type: Master's thesis
Year: 2009
Downloads: 187
Quote: 1
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Abstract


According to the platform’s specialty of Shengli offshore oilfield, this paper choosed the activated polymer emusion as the oil-displacing agent. According to the performance test, this polymer has good dissolution and anti-salinity which is needed in offshore oilfield. According to the rheology experiment of the polymer solution, Newtonian fluid and Power-law fluid mode were used to describe the activated polymer solution. There is a limit shear rate in the polymer’s flow curve. The polymer solution acts as power-law fluid when the shear rate is lower than the limit shear rate. When the shear rate is higher than the limit shear rate, the polymer solution acts as Newtonian fluid. The polymer solution with different consistency of 2000mg/L, 3000mg/L, 4000mg/L and 5000mg/L have different limit shear rate of 365.7s-1、501.2s-1、531.5s-1 and 656.8s-1. The flowage mode is judged according to the shear rate in the pipeline.The polymer’s local flow head loss was tested by this paper. The polymer conduit flow model was analysed systematically based on the Newtonian fluid mechanics and non-newtonian fluid mechanics theory. The viscosity loss of the polymer was investigated and polymer injection equipments were optimised to ensure the smaller viscosity loss. According to the limited space of the platform, this paper designed an online injection process flow in offshore oilfield. This paper establelished indoor physical simulation device and proceeded on-line emulsion breaking and mixing test. According to the calculation results and test, the parameters of the process flow were optimized. The polymer solution’s viscosity with different consistency of 1000mg/L and 3000mg/L can reach 70.4% and 86.0% compared with the polymer solution which is agitated normally.

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CLC: > Industrial Technology > Oil and gas industry > Offshore oil and gas exploration and development > Offshore oil and gas exploration
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