Apparatus and method for dynamic simulation of petroleum pipe scaling and wax precipitation
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A dynamic simulation, oil pipe technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve the effect of reducing the interference of fluid temperature, reducing the impact, and low shear strength
Inactive Publication Date: 2016-01-27
SOUTHWEST PETROLEUM UNIV
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[0007] Through the research on the experimental equipment and method of fouling and waxing of oil pipes, it is found that the existing technology cannot truly simulate the temperature and pressure of the fluid, the flow rate, the material of the pipe and its surface characteristics, and the temperature difference between the walls, and at the same time study the effect of time on the scale deposition and wax deposition. The law and mechanism of action
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Embodiment 1
[0037] Implementation example 1: fouling test method and steps:
[0038] Step 1: Based on the operating parameters of the oil field and using similar principles, calculate the pipeline pressure, flow rate and pipe diameter required for the experiment, and complete the design of the experiment scheme;
[0039] Step 2: Take two identical pipes as the first test tube 11 and the second test tube 17 respectively, and according to figure 2 The second test tube 17 is machined as shown;
[0040] Step 3: Based on image 3 The processing cover plate 23 shown in the figure ensures a reasonable distance between adjacent Class A through-holes 24, and avoids the influence of the change of flow state on the formation and adsorption of scale crystals;
[0041] Step 4: processing and grouping the coupon samples 25, and grinding the coupon samples 25 with metallographic sandpaper of different meshes;
[0042] Step 5: cleaning, drying, and measuring the quality and wall thickness of the coup...
Embodiment 2
[0048] Implementation example 2: wax deposition experimental method and steps:
[0049] Step 1: Based on the operating parameters of the oil field and using similar principles, calculate the pipeline pressure, flow rate and pipe diameter required for the experiment, and complete the design of the experiment scheme;
[0050] Step 2: Take two identical pipes as the first test tube 11 and the second test tube 17 respectively, and according to figure 2 The second test tube 17 is machined as shown;
[0051] Step 3: Based on image 3 The processing cover plate 23 shown in the figure ensures a reasonable distance between the adjacent A-type through holes 24, and avoids the influence of the change of flow state on the formation and adsorption of wax crystals;
[0052] Step 4: processing and grouping the coupon samples 25, and grinding the coupon samples 25 with metallographic sandpaper of different meshes;
[0053] Step 5: cleaning, drying, and measuring the quality and wall thick...
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Abstract
The present invention provides an experimental apparatus and a method for petroleum pipe scaling and wax precipitation, the apparatus comprises a liquid storage tank, a variable frequency motor, a screw pump, a constant temperature water bath tank, a first test tube, a second test tube, a cover plate and a lacing film test sample. The liquid storage tank is used for containing oil water needed for the experiment, and is connected with a temperature control system and a heater to ensure oil water temperature is constant at a preset value; a predetermined flow rate of oil output can be achieved by the variable frequency motor and the screw pump, the constant temperature water bath tank is used for simulation of test tube section wall temperature to study changing laws and mechanisms of sediment characteristics along with pipe wall temperature differences; the first test tube is a full size pipe segment, and is used for fully simulating pipe scaling and wax precipitation, and the second test tube is a pipe segment with an opening, and is used for study on the laws and mechanisms of the sediment characteristics along with time. The experimental apparatus and method can provide new methods and supports for research and development and evaluation of measures scaling and wax removal and prevention, and can ensure the petroleum pipe safe, economic and efficient operation.
Description
technical field [0001] The invention relates to an experimental device and method for fouling and waxing of oil pipes, in particular to a device and method for dynamically simulating fouling and waxing of oil pipes. Background technique [0002] With the deepening of oil and gas field development, the energy of oil reservoirs gradually decays. Secondary and tertiary oil recovery technologies such as water injection, thermal recovery, gas flooding, and chemical flooding have been widely used in oilfields at home and abroad. At the same time, a series of problems have also been caused. First, due to changes in temperature, pressure, and flow rate of injected water or formation water, the water body is supersaturated and scales are generated, such as CaCO 3 , CaSO 4 , BaSO 4 , SrSO 4 Second, the application of thermal recovery increases the temperature of the fluid in the pipe and increases the activity of scaling reactions; while the application of gas flooding and chemical...
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