發(fā)布時(shí)間：2018-04-04 08:41

  本文選題：注水井　切入點(diǎn)：綜合處理劑　出處：《北京化工大學(xué)》2015年碩士論文

【摘要】：某油田為水驅(qū)開(kāi)采,原油含蠟量、粘度和凝固點(diǎn)均較高,在注水開(kāi)采過(guò)程中,因管壁上附著有一定強(qiáng)度的沉積物,導(dǎo)致井筒堵塞,無(wú)法完成測(cè)試。針對(duì)這一問(wèn)題,對(duì)堵塞的注水井進(jìn)行取樣分析。在此基礎(chǔ)上,利用單因素試驗(yàn)法、均勻試驗(yàn)法和正交試驗(yàn)等方法篩選出了合適的清、防蠟組分和防垢組分,在適宜的乳化劑作用下得到了清防蠟效果好、阻垢能力強(qiáng)的綜合處理劑,并在該油田進(jìn)行了現(xiàn)場(chǎng)試驗(yàn)。本文主要的研究成果和結(jié)論有：1、通過(guò)對(duì)兩個(gè)不同區(qū)塊注水井管壁上的沉積物和水樣進(jìn)行分析,發(fā)現(xiàn)沉積物中主要成分為烴類化合物和礦物質(zhì),即所謂的“死油”。兩種油樣中烴類化合物的含蠟量均高于20%,石蠟部分的碳數(shù)分布集中于C20-C28；而水樣中主要的成垢離子為Ca2+.Mg2+.Ba2+.S042-、C032-和HC03-等,易形成的水垢主要為CaC03.2、通過(guò)正交試驗(yàn)法得到了由9#復(fù)合溶劑、AR-36、復(fù)合EVA以及乙二醇單丁醚構(gòu)成的清防蠟組分的配方。同時(shí),發(fā)現(xiàn)聚環(huán)氧琥珀酸(PESA)與氨基三亞甲基磷酸(ATMP)以質(zhì)量比1：2復(fù)合后對(duì)三種水樣的阻垢率最高,高于99.89%；0-30與O-3復(fù)合后乳化效果最好,靜置80h后的穩(wěn)定性系數(shù)為72.45%。3、在乳化劑作用下不相溶的清防蠟組分和阻垢劑水溶液形成了穩(wěn)定的乳狀液,即綜合處理劑。室內(nèi)試驗(yàn)結(jié)果表明：該處理劑的清蠟速率為26.9mg/min,防蠟率高于56.00%,阻垢率高于98.90%,還具有一定的降粘作用,并且對(duì)注水井封隔器內(nèi)部皮套筒的危害小。4、現(xiàn)場(chǎng)試驗(yàn)結(jié)果表明：該藥劑能夠很好地解決不同區(qū)塊注水井因死油、結(jié)蠟及結(jié)垢導(dǎo)致的卡井問(wèn)題,并且操作簡(jiǎn)便,價(jià)格低廉,具有很好的現(xiàn)場(chǎng)應(yīng)用價(jià)值。
[Abstract]:The wax content, viscosity and solidification point of crude oil are high in a certain oil field. In the process of waterflooding, the well bore is blocked because there is a certain strength of sediment attached to the pipe wall, so it is impossible to complete the test.In order to solve this problem, sampling and analysis of plugged injection wells are carried out.On this basis, by using single factor test method, uniform test method and orthogonal test method, the suitable cleaning, anti-wax and anti-scaling components were screened out, and the effect of wax cleaning and anti-wax was obtained under the action of suitable emulsifier.The comprehensive treatment agent with strong scale inhibition ability was tested in the field.The main research results and conclusions in this paper are as follows: (1) by analyzing the sediment and water samples on the wall of water injection wells in two different blocks, it is found that the main components in the sediments are hydrocarbon compounds and minerals, that is, the so-called "dead oil".The wax content of hydrocarbon compounds in both oil samples was higher than 20, and the carbon number of paraffin was mainly distributed in C20-C28.The main scaling ions in water samples were Ca2. Mg2. Ba2. S042-C032- and HC03-, etc.The easily formed scale is mainly CaC03.2. By orthogonal test, the formula of wax cleaning and preventing component composed of 9# compound solvent, AR-36, composite EVA and ethylene glycol monobutyl ether has been obtained.At the same time, it was found that when the mass ratio of PESA and ATMP) was 1:2, the scale inhibition rate of the three kinds of water samples was the highest, and the emulsifying effect was the best when the mixture of PESA and O-3 was higher than 99.890-30 and O-3.The stability coefficient of 80 h was 72.45%. The stable emulsion, I. e., the comprehensive treatment agent, was formed by the insoluble wax cleaning component and the scale inhibitor solution under the action of emulsifier.The results of laboratory test show that the wax removal rate of the agent is 26.9 mg / min, the wax prevention rate is higher than 56.00 and the scale inhibition rate is higher than 98.90.The field test results show that the medicament can solve well the problems caused by dead oil, wax and scaling in water injection wells in different blocks, and the operation is simple and the price is low.Has very good field application value.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.62

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