A Study On Scale Mechanism And The Technology Of Antiscale And Corrosion Inhibition In The Oil Field Water Pipeline

While the oil extraction turns into the last period of high water containing in oilfield, large numbers of sewage containing oil was recycled to infuse which mades scale and corrosion seriously in watering pipeline system, so it means great significance to systemiclyresearch the polyasparticacid, which is a new kind of environmental-friend antiscale. Research the process and mechanism of scale and the influencing factor in oilfield watering pipeline is available to prevend scale. In order to synthesize the polyasparticacid production which is suit for Daqing oilfield watering pipeline and this production would reduce the degree of scale and corrosion, the character of water scale in pipeline was analyzed in the process of alkaline-surfactant-polymer. The synthesize route, best synthesize condition and antiscale effect of polyasparticacid were researched. And in order to reduce the cost of added materia agent, the compounding scale inhibition experiment of polyasparticacid and other kinds of antiscale were carried through, at the same time, the compounding corrosion inhibition and scale inhibition experiment of polyasparticacid and other kinds of antiscale were also carried out, the effect is very good.Maleic anhydride was used as raw material, and was polymerized to create PSI, then PSI was hydrolyzing to creat polyasparticacid. The method was introduced in this text, caloric stability of the production and the effect of aggregation are excellent, and the technological folwsheet is simple. The best synthesize condition and quantity of polyasparticacid was filtrated from oilfiled water experimentation, then the best polyasparticacid production was choosed. The corrosion inhibition effect of polyasparticacid with different molecular weight, compounding effect of polyasparticacid and other salts,and the rate of corrosion inhibition in the water with different temperature and salinity were researched. The compound environmental-friend formulation of polyasparticacid tungstate was testified to be practical value, and its capability of scale inhibition and corrosion inhibition is excellent. At the same time, the method of medicament slowly released was researched to enhance utilizing rate of used medicament, and the method will guide medicament utilizing.