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Research on Scaling Mechanism of Material in Water and Oil System in Oil Field

Author: HanWenJing
Tutor: MengQingWu
School: Daqing Petroleum Institute
Course: Safety Technology and Engineering
Keywords: Scaling Oil and water media ASP flooding Scaling mechanism
CLC: TG115
Type: Master's thesis
Year: 2009
Downloads: 217
Quote: 1
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Abstract


Oilfield production and widespread problem of scaling. Scaling mechanism is only in a single chemical considerations mitigation forming reaction, and after a long time fouling still generated on the material surface, the antifouling effect is not good, but from the material point of view can be realized thoroughly antifouling purpose. Papers Indoor the scaling test static simulation coupon Research ASP flooding, oilfield sewage, water flooding in three media under carbon steel, stainless steel, ceramics, paint, coating, and rubber six material fouling situation. The microstructure and morphology by scanning electron microscopy and energy dispersive spectroscopy test to detect material and determine the composition of the fouling material amount of scale; using the gravimetric method; the stereomicroscope measurement use transformation wetting angle to determine wettability of the surface of the material, looking for anti-scaling and anti-fouling methods provide a theoretical basis for the actual production. Live ternary liquid medium fouling conditions and wettability, temperature, flow rate, and factors such as the impact of fouling, proposed scaling law oilfield equipment. Experimental studies and theoretical analysis showed that the scale formation and the chemical composition of solid materials, with the increase in surface energy, the overall upward trend in the amount of scale. Three medium carbon steel before rust, corrosion exacerbated fouling, rust mainly composed of Fe 3 O 4 the square iron oxide in the rules appears on the silica scale. Modified Viton lower than the hydrogenated nitrile rubber surface, anti-scaling performance is stronger than the hydrogenated nitrile rubber. Fouling oilfield sewage system mainly composed of CaCO 3 ASP flooding produced scale sample of silica and carbonate mixed fouling, fouling the main ingredient SiO 2 dirt. The three yuan recovery liquid flow rate is less than 1.0m / s, increasing weight of fouling increases with the flow rate increases; at a flow rate of 1.0m / s, the weight of the fouling growth reached the highest value; flow rate of greater than 1.0M / s, the fouling of weight gain is decreased with the flow rate increases. When other conditions remain unchanged, and easy scaling with increasing temperature, the temperature at 30 ° C 4 5 ° C range of content is easy to form silica scale. The ASP flooding fluid and produced fluid Filthes, the scale layer structure is not the same. Implantation station pipeline corrosion of the equipment affect the formation of fouling, and early fouling of deflector core, a lot of scrap iron, sediment, and the solution formed in the magnesium scale is first attached to the surface of the deflector core, with the passage of time, the limescale This is the nuclei gradually generated. Produced fluid, silicate scale in carbonate scale on the basis of and accounting for the major part of. The same liquid medium to in different wetting effect of the surface of the solid material has a very significant differences, a large contact angle of ceramic material, the wettability of minimum not easily adhered fouling. Carbon steel contact angle, easy adhesion fouling. Fouling growth on solid materials must first go through a period of induction period. During this time, the material on the surface of the first adsorption layer of sediment, makes it suitable for the growth of fouling layer \

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallurgy ( Physical Metallurgy ) > Analytical tests of the metal (Metal Testing and Materials )
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