發(fā)布時(shí)間：2018-05-13 08:30

  本文選題：原油流動(dòng)改進(jìn)劑 + 免清蠟�。� 參考：《東北石油大學(xué)》2016年碩士論文

【摘要】：大慶油田部分區(qū)塊采出的原油屬于高含蠟原油,抽油機(jī)井會(huì)出現(xiàn)結(jié)蠟現(xiàn)象,需要定期對抽油機(jī)井進(jìn)行清蠟,同時(shí)由于氣候環(huán)境,還需使用摻熱水伴熱的傳輸方式,這樣會(huì)導(dǎo)致生產(chǎn)能耗的增加。為此,本文開展加入流動(dòng)改進(jìn)劑的方法實(shí)現(xiàn)抽油機(jī)井免清蠟以及地面集輸研究,從而油藏的有效開采提供理論與技術(shù)指導(dǎo)。本文選取DODE-3型油溶性原油流動(dòng)改進(jìn)劑進(jìn)行免清蠟以及地面集輸實(shí)驗(yàn)研究,通過室內(nèi)評價(jià)實(shí)驗(yàn),優(yōu)選出合理的加藥濃度及加藥方式。根據(jù)所確定的加藥方式以及所需濃度,設(shè)計(jì)了加藥工藝,通過計(jì)算,確定了每次加藥所需藥劑量。同時(shí)開展了藥劑濃度監(jiān)測及排除定壓放氣對藥劑損耗的影響實(shí)驗(yàn),完善了流動(dòng)改進(jìn)劑的加藥工藝。展開抽油機(jī)井免清蠟研究,分析加入流動(dòng)改進(jìn)劑泵內(nèi)流動(dòng)阻力、沿程阻力以及流體粘度變化的影響。實(shí)驗(yàn)表明,流動(dòng)改進(jìn)劑以及含水率的增加,可以實(shí)現(xiàn)流動(dòng)阻力以及流體粘度的降低,實(shí)現(xiàn)防蠟效果。同時(shí)選取8座轉(zhuǎn)油站、843口油井,含水由33%到98%分布,平均單井日加流動(dòng)改進(jìn)劑1.4kg/d,平均加藥濃度185mg/L進(jìn)行免清蠟實(shí)驗(yàn),其效果僅2015年當(dāng)年累計(jì)減少熱洗車洗井552井次、熱洗泵洗井1417.2井次。因少熱洗而少影響的油量為1.35×104t。展開流動(dòng)改進(jìn)劑在地面集輸試驗(yàn)研究,通過流動(dòng)改進(jìn)劑與破乳劑的協(xié)同實(shí)驗(yàn)以及觀察單井回油、計(jì)量間、中轉(zhuǎn)站的溫度變化,發(fā)現(xiàn)單井回油、計(jì)量間、中轉(zhuǎn)站的溫度變化很小,脫水量大大增加,便于集輸。建立最低藥劑流量數(shù)學(xué)模型,開展冬季集輸時(shí)的回油溫度研究,計(jì)算出冬季地面溫度-20℃時(shí),集輸最低藥劑流量3m3/d,以及不同含水率下的冬季集輸時(shí)的回油溫度。通過7口井原油冷啟動(dòng)實(shí)驗(yàn)研究,確定產(chǎn)液量大于4t/d,停井后可以實(shí)現(xiàn)冷啟集輸。從而為地面低溫高效集輸提供依據(jù)。
[Abstract]:The crude oil produced in some blocks of Daqing Oilfield belongs to high waxy crude oil, and waxing will occur in pumping wells. It is necessary to remove wax from pumping wells on a regular basis. At the same time, due to the climatic environment, it is also necessary to use the heat transfer mode of mixing hot water with heat. This will lead to an increase in production energy consumption. Therefore, in this paper, the method of adding flow improver to the oil pumping well without wax cleaning and surface gathering research is carried out to provide theoretical and technical guidance for effective reservoir production. In this paper, DODE-3 type oil-soluble crude oil flow improver is selected for wax removal and surface gathering and transportation experiments. Through laboratory evaluation experiments, reasonable dosing concentration and dosing method are selected. According to the determined dosing method and the required concentration, the dosing process was designed, and the dosage of each dosing was determined by calculation. At the same time, experiments were carried out to monitor the concentration of the reagent and eliminate the influence of constant pressure and degassing on the loss of the reagents, and the adding process of the flow improver was improved. In this paper, no wax removal in pumping well is studied, and the effects of flow resistance, flow resistance and fluid viscosity change in pump with flow improver are analyzed. The experiments show that the flow resistance and the viscosity of the fluid can be reduced with the increase of the flow improver and the moisture content, and the effect of wax prevention can be realized. At the same time, 843 wells in 8 oil transfer stations were selected, the water content was distributed from 33% to 98%, the average daily flow improver was 1.4 kg / d and the average concentration of 185mg/L was added to the single well to carry out the wax-free experiment. The effect was only to reduce the total number of hot car washing wells by 552 wells in the same year in 2015. 1417.2 wells are washed by hot washing pump. The amount of oil less affected by less heat washing is 1.35 脳 10 ~ 4 t. Through the synergistic experiment of flow improver and demulsifier and observing the temperature change of single well return oil, metering room and transfer station, it is found that the temperature change of single well return oil, metering room and transfer station is very small. The removal of water is greatly increased, which is convenient for gathering and transportation. A mathematical model was established to study the return oil temperature during gathering and transportation in winter. The minimum flux of fungicides in winter was calculated when the surface temperature was -20 鈩，

本文編號：1882418