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- Title
大港油田卤水压井液结垢问题治理研究.
- Authors
尤秋彦; 宋晓莉; 薛子钰; 廖兴松; 樊松林
- Abstract
To solve the problem of salt brine scaling, three kinds of scale inhibitors WJ - 1, TJ - 302 and TS - 6 were used to modify the medium and high density brine and calcium brine. The formulation was prepared and applied to evaluate the scale inhibition performance of formation water and reinjection water in Dagang Oilfield. The test results show that the two modified formulas of calcium halide + 1 % - 3% WJ 1 + 0. 2% sodium dodecyl sulfate and salt brine + 1 % - 3% WJ - 1 + 1 % - 3% TS - 6 + 0. 2% sodium dodecyl sulfate can make the formation water of 7 000 mg /L NaHC03 and 500 mg /L Na2S04 free from scaling at 90 "C, the calcium retention rate reaches 90. 0%, and the recovery rate of formation permeability 89% . Therefore, the formula is suitable for the formation with high alkali and high salinity, which can solve the problem of scaling and plugging formation in brine well killing operation in Dagang Oilfield, and has certain guiding significance for other formations of the same nature.
- Publication
Natural Gas & Oil, 2020, Vol 38, Issue 5, p77
- ISSN
1006-5539
- Publication type
Article
- DOI
10.3969/j.issn.1006-5539.2020.05.013