Chemical regulator for stratified waterflooding in water injection well and stratified water amount regulating construction method
A technology of conditioner and water injection well, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of layered water injection limitation and high construction cost, and achieves small injection volume, low cost, and convenient blockage removal. Effect
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Embodiment 1
[0016] Embodiment 1: use 15% of 100# high-pressure polyethylene, 55% of oxidized bitumen, 18% of 58# paraffin, and all the other are mineral spirits. A chemical regulator with a particle size of 0.5-1.0mm and a softening point of 158°C is made.
Embodiment 2
[0017] Example 2: A certain oilfield uses chemical regulators to carry out water diversion operations on J367 well. The water injection section of this well has 7 layers 26 meters thick, 260 perforation holes, the average temperature of the oil layer is 137°C, and the normal water injection pressure is 27MPa. Chemical Modulator in Example 1. The design injection pressure is 30MPa, and the design injection chemical regulator is 2600kg. Use clear water containing 0.1% sodium dodecylbenzenesulfonate surfactant as the carrier fluid, the concentration is 120kg / m 3 , when 1800kg of chemical regulator is injected, the wellhead pressure rises from 30MPa to 33MPa, and the normal water injection production is transferred after the replacement of clean water. The comparison of layered water absorption before and after construction is shown in Table 1 below:
[0018] Compared
[0019] It can be seen from the above table that the relative water absorption of the 4 sublayers in...
Embodiment 3
[0020] Embodiment 3: use 10% of 100# high-pressure polyethylene, 45% of oxidized bitumen, 18% of 58# paraffin, and all the other are mineral spirits. A chemical regulator with a particle size of 0.8-1.2mm and a softening point of 110°C is made.
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