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Method for supersonic wave-microwave combined treatment on three-compound combination flooding mixed scale

A ternary composite and synergistic treatment technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as increased crude oil workload, oil layer damage, adverse effects, etc. Eco-friendly, easy-to-remove, easy-to-use effects

Inactive Publication Date: 2016-11-02
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, chemical agents will have adverse effects on the environment and easily cause damage to the oil layer, which not only increases the workload of post-processing of crude oil, but also is incompatible with the current global call for green environmental protection

Method used

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  • Method for supersonic wave-microwave combined treatment on three-compound combination flooding mixed scale
  • Method for supersonic wave-microwave combined treatment on three-compound combination flooding mixed scale
  • Method for supersonic wave-microwave combined treatment on three-compound combination flooding mixed scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0022] like figure 1 As shown, this method of using ultrasonic and microwave synergistic treatment of mixed scale of ASP flooding is that the oilfield produced fluid first enters the ultrasonic descaling device through the metering room (or before a certain process node with serious scaling), and the temperature At 20-60°C, use ultrasonic waves to remove and prevent scale, the ultrasonic frequency is 40-59 kHz, the ultrasonic intensity is 70%-100%, and the action time is 15 minutes; then microwave is used to accelerate the sedimentation of scale at the sewage settling tank Speed, the microwave power is 400-1000 W, and the microwave time is 3 minutes; then the oilfield produced fluid after microwave treatment is settled and continues to enter the next process node.

Embodiment 1

[0025] Take control example 1 to simulate ternary production fluid, and measure its ion content at room temperature of 20°C without the action of ultrasonic waves and microwaves.

[0026] If the combination of ultrasonic and microwave is not used, the scale-forming ions in the solution will gradually decrease and form scale, which will affect the normal production of the oil field. When changing different ultrasonic and microwave action conditions, measure the concentration of scale-forming ions in the solution. The higher the concentration, the more effective the combined effect of ultrasonic-microwave, reducing the chance of scaling.

Embodiment 2

[0028] Take control example 1 to simulate ternary production fluid, and let it act on it at room temperature 20°C, ultrasonic frequency 40kHz, ultrasonic intensity 70%, for 15 minutes; then measure the content of each ion after microwave 400W, microwave time 3 minutes.

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Abstract

The invention relates to a method for supersonic wave-microwave combined treatment on three-compound combination flooding mixed scale. The method comprises simulating a three-compound combination flooding scale forming system with pH of 10.8 through a sodium silicate solution system prepared from stratum mineralized water, wherein the three-compound combination flooding scale forming system has a Ca<2+> concentration of 45mg / L, a Mg<2+> concentration of 15mg / L, a Ba<2+> concentration of 40mg / L, an Al<3+> concentration of 10mg / L and a Si<4+> concentration of 1200mg / L, metering the three-compound combination flooding forming system or oil field produced liquid in a metering room, feeding the three-compound combination flooding forming system or oil field produced liquid into a supersonic wave descaling instrument, carrying out supersonic wave descaling at a temperature of 20-60 DEG C at ultrasonic frequency of 40-59kHz at ultrasonic intensity of 70-100% for 15min, accelerating a scale settlement speed in a sewage settlement pot through microwave under conditions of microwave power of 400-1000W and microwave treatment time of 3min. The method substantially improves scale removal and prevention effects and produces loose scale which has poor chemical stability and can be removed easily.

Description

technical field [0001] The invention relates to the technical field of scale removal and anti-scaling of three-element compound flooding, in particular to a method for synergistically treating mixed scales of three-element compound flooding by using ultrasonic waves and microwaves. Background technique [0002] ASP flooding is a flooding system composed of alkali (Alkali), surfactant (Surfactant) and polymer (Polymer) in an appropriate proportion, referred to as ASP. [0003] Due to the introduction of alkali in the ASP flooding, the alkali reacts with calcium and magnesium ions in the formation water to form scale; in addition, the alkali reacts with the feldspar, kaolin and montmorillonite in the formation components, and the silicon and aluminum contained in them react to form scales. Transferred into the solution, silicon-alumina scale crystals can be formed under appropriate conditions, resulting in serious scaling of the displacement agent ternary fluid in the reservoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/02
CPCC02F1/302C02F1/36C02F5/02
Inventor 隋欣王宝辉吴红军聂春紅苑丹丹李庆云
Owner NORTHEAST GASOLINEEUM UNIV
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