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A Method of Cooperatively Treating Mixed Scale of ASP Flooding Using Ultrasonic and Microwave

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 damage to oil layers, increased workload of crude oil, adverse effects, etc., to achieve easy The effect of removal, environmental protection technology and easy operation

Inactive Publication Date: 2018-12-25
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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  • A Method of Cooperatively Treating Mixed Scale of ASP Flooding Using Ultrasonic and Microwave
  • A Method of Cooperatively Treating Mixed Scale of ASP Flooding Using Ultrasonic and Microwave
  • A Method of Cooperatively Treating Mixed Scale of ASP Flooding Using Ultrasonic and Microwave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0022] Such as 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 present invention relates to a method for synergistically treating mixed scale of ASP flooding by using ultrasonic waves and microwaves. The method for synergistically treating mixed scale of ASP flooding by using ultrasonic waves and microwaves is a sodium silicate solution system prepared with stratum mineralized water Simulate the ASP flooding scaling system, the pH value is 10.8, the Ca2+ concentration in the ASP flooding scaling system is 45 mg / L, the Mg2+ concentration is 15 mg / L, the Ba2+ concentration is 40 mg / L, and the Al3+ concentration is 10 mg / L, and the Si4+ concentration is 1200 mg / L. The above-mentioned ASP flooding system or oilfield production fluid first enters the ultrasonic descaling device through the metering room. The frequency is 40‑59 kHz, and the ultrasonic intensity is 70%‑100%; then microwaves are used to accelerate the coagulation velocity of the scale at the sewage settling tank, the microwave power is 400‑1000 W, and the microwave time is 3 min. The scale removal and anti-scaling effect of the invention is significantly improved, and the generated scales are loose in texture, poor in chemical stability and easy to remove.

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 Patents(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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