吉林油田集輸系統(tǒng)結(jié)垢規(guī)律研究
[Abstract]:Jilin Oilfield has entered the stage of low oil content, low production stage, high energy consumption, serious energy waste has been frequently appeared in the current gathering and transportation mode and production and transportation equipment energy, the oil field gathering and transportation system corrosion scaling is serious. Not only the normal production of the oil field will be affected, the operation life will be reduced sharply, but also the safe and long term production of the oil field will be affected. Jilin Oilfield has used water injection for a long time to develop the oil field. The problem of accumulated scaling is urgent. The scaling phenomenon of different degrees appears repeatedly in oil wells and surface gathering pipelines, when scaling is most serious in some oil fields, Dirt causes the pipeline to be blocked, and the oil well is completely buried by dirt, which is often accompanied by oil production. The problem of scaling in oil fields must be solved pertinently, and some methods of treating the symptoms and not the root cause can not be chosen. It is urgent to find an effective solution to scale problem in oil field. Only by reducing energy consumption can we realize the sustainable development of the oil field, so we must optimize and transform the whole gathering and transportation system. Nowadays, there are few articles to study the energy consumption and optimal operation of the whole gathering and transportation system in low yield oil fields. Therefore, it is necessary to find out the main influencing factors of the low efficiency, high energy consumption and low revenue of the whole gathering and transportation system. The energy consumption and efficiency of the whole gathering and transportation system in low production oil fields are tested and analyzed, the distribution of energy consumption is given, and the places of high efficiency and low efficiency are found out. Based on the analysis of the reasons, the paper puts forward the measures of saving energy and reducing consumption according to local conditions, and calculates the potential of energy saving by theoretical calculation, and studies its optimized operation scheme. In this paper, the characteristics of water quality analysis of gathering and transportation system in Jilin Oilfield are studied, and the water quality types are judged. The composition of the scale sample was analyzed qualitatively and quantitatively. Therefore, the changes of ionic concentrations in water samples under different pH, temperature and time were analyzed for the various components in the scale sample. Finally, the scaling mechanism of various types of scale and the corresponding scaling removal mechanism and measures are deduced from the experimental data, and the scaling trend of the gathering and transportation system in Jilin Oilfield is predicted. The results show that all the water samples are weakly alkaline, and the concentration of HCO _ 3-C _ 2 and mg _ 2 ions in the water is high, so it is easy to cause scaling at a certain temperature and pressure. Most water samples are sodium bicarbonate. There are sulphuric acid reducing bacteria and decomposed bacteria in the extract, basically no iron bacteria. The corrosion rate of carbon steel can be further reduced by adding agent. The increase of pH value will promote the conversion of HC03- ions to C032- ions, resulting in the precipitation of CaCO3 and MgCO3. At the same time, increasing the temperature and prolonging the time is beneficial to the conversion of HC03 ions to C03 ions, and also to the formation of CaCO3 and MgCO3 precipitates. The results show that the main components in the scale sample are silica, calcium carbonate, magnesium carbonate and ferric carbonate. At the same time, oil in the recovery liquid, also easy to form oil scale.
【學(xué)位授予單位】:東北石油大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TE863
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