Novel integration technique for improving recovery ratio of thick oil with high thickness and low yield
A recovery factor and heavy oil technology, applied in the fields of fluid extraction, earthwork drilling, drilling composition, etc., can solve the problems of lower crude oil quality, consumption of thin oil resources, hindering industrial development, etc., and achieve high applicability, Enhanced oil recovery and the effect of technological progress
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[0026] Example
[0027] Test site: Forty oil wells in an oil field in Xinjiang; the average viscosity of the original oil sample is 90,000 mPa·s at 50°C.
[0028] A set of comparisons: using conventional thin oil blending and viscosity reduction technology, 16 tons of thin oil per day, 37 tons of mixed liquid production, 21 tons of formation liquid, of which 18 tons of oil production, 6 tons of water production, and the viscosity of the wellhead liquid production at 50℃ is 900mPa ·S;
[0029] Using self-made heavy oil dispersion drag reducer, injection of 1% A and B 0.125% aqueous solution, daily injection volume of 6 tons, mixed liquid production of 37 tons, formation liquid production of 31 tons, of which 22.86 tons of oil production, 8.14 formation water production Tons, the viscosity of the wellhead production fluid is 150mPa·s at 50℃, the viscosity reduction rate is greater than 99%, and the daily saving of thin oil is 16 tons.
[0030] The second group of control: using convent...
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