本文關(guān)鍵詞：產(chǎn)稠油ALX氣井井筒流動(dòng)型態(tài)研究　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 氣井 稠油 降粘劑 表面張力 彈性模量

【摘要】：在進(jìn)行稠油組分及粘溫特性分析的基礎(chǔ)上,從常用的水基和油基兩大類降粘劑中選取11種降粘劑,將其與稠油配制成5種不同濃度的試樣,在井口溫度為9℃和井底溫度34℃條件下,懫用RS-6000流變儀對(duì)試樣進(jìn)行流變性測(cè)試,分別給出了稠油流變性參數(shù)及視粘度。結(jié)果表明:在低用量條件下,水基降粘劑會(huì)使稠油的粘度增大,ALX氣井中不能采用;油基降粘劑可以有效地降低稠油的粘度,從技術(shù)指標(biāo)和經(jīng)濟(jì)成本兩方面綜合考慮,優(yōu)選出了CY1JL降粘劑,且最佳用量范圍為22%~25%。根據(jù)風(fēng)吹水面激起波浪的杰弗里斯(Jeffreys)波浪產(chǎn)生條件,參照泰特爾-杜克勒(Taitel-Dukler)水平管氣液兩相流動(dòng)型態(tài)判別準(zhǔn)則及流動(dòng)型態(tài)分布圖,懫用極值法確定了波浪向下游傳播的速度并選取平均杰弗里斯遮蔽系數(shù),建立了在環(huán)霧流狀態(tài)下氣流可攜帶稠油的最大粘度方程式,根據(jù)實(shí)際生產(chǎn)資料,求出了ALX氣井中氣流可將所產(chǎn)稠油攜帶出來(lái)時(shí)稠油粘度的最高值(氣井稠油降粘目標(biāo)值)為0.02092914mPa.s,化學(xué)降粘技術(shù)無(wú)法將稠油粘度降到此值。根據(jù)特納(Turner)方法,從提高氣井產(chǎn)量和優(yōu)選生產(chǎn)管柱的角度考慮,進(jìn)行了大量計(jì)算。計(jì)算結(jié)果表明:要想將氣井中稠油采出,產(chǎn)氣量需提高到近2.4×104m3/d,遠(yuǎn)大于氣井的實(shí)際產(chǎn)量;要想將氣井中的最大液滴舉升到地面,需將生產(chǎn)管柱直徑從62mm降到30mm。在水平向,如果能將液膜以液滴的形式從油管內(nèi)壁上剝離下來(lái),并隨氣流一同上升,氣流速度需要克服稠油液膜的表面張力和粘彈性模量,結(jié)合杰弗里斯提出的產(chǎn)生波浪的方程,建立起了修正杰弗里斯方程。根據(jù)修正杰弗里斯方程的計(jì)算結(jié)果表明:當(dāng)同時(shí)考慮表面張力和粘彈性模量影響時(shí),氣井井筒已全部被稠油液膜占據(jù),氣井被堵死,無(wú)產(chǎn)量。在垂直向,根據(jù)安薩瑞(Ansari)方法,液膜如果能沿井筒內(nèi)壁向上流動(dòng),需要井筒中氣芯的壓力梯度和液膜的壓力梯度收斂。根據(jù)大量的計(jì)算結(jié)果表明表明:當(dāng)稠油液膜厚度大于3mm(除了液膜厚度等于15mm)時(shí),液膜均可沿井筒內(nèi)壁向上流動(dòng),稠油可以被采到地面。
[Abstract]:Based on analysis of heavy oil fractions and viscosity temperature characteristics, selected 11 kinds of viscosity reducer from water-based and oil-based two kinds of viscosity reducer, the heavy oil and prepared into 5 different concentrations of samples at the wellhead temperature is 9 DEG C and the bottom temperature under 34 DEG C, Zhi RS-6000 rheology instrument for sample rheology test, the rheological parameters are given and the heavy oil. The results showed that the apparent viscosity at low dosage, water-based viscosity reducer will make the oil viscosity increase, not used in ALX gas well; oil viscosity reducer can effectively reduce the viscosity of heavy oil, considered from the two aspects of technical indicators and the economic cost, optimized the CY1JL viscosity reducer, and the optimum dosage range of 22%~25%. according to the wind surface wave Jeffries (Jeffreys) conditions of wave, referring to his - Duke Le (Taitel-Dukler) of gas-liquid two phase flow patterns identification in horizontal pipe Criterion and flow pattern map, Zhi using extreme value method to determine the velocity of wave propagation to the downstream and select the average Jeffries shading coefficient, the maximum viscosity equation in annular mist flow under the condition of air flow can carry heavy oil was established, according to the actual production data, the air can be produced by ALX gas well in carrying out the highest value of heavy oil when the viscosity of heavy oil (sticky target value is 0.02092914mPa.s, reduced gas heavy oil) chemical visbreaking technology cannot the viscosity drop this value. According to Turner (Turner) method, from the point of improving the yield and optimization of production string wells consideration, have done a lot of calculations. The calculation results show that to wells in heavy oil recovery the gas production, need to be increased to nearly 2.4 x 104m3/d, actual output is far greater than the wells; to lift the largest drop in gas wells to the ground, the column diameter decreased from 62mm to 30mm. in the horizontal direction, if you can The film will be in the form of droplets from the pipe wall on the stripped down, and with the air flow rate will rise, to overcome the surface tension and viscoelastic modulus of heavy oil film, combined with the wave equation proposed by Jeffries, established a modified Jeffries equation. According to the modified Jeffries equation calculation results: when considering the effect of surface the tension and viscoelastic modulus, wellbore has been heavy oil film occupy, gas is blocked, no production in the vertical direction, according to Ann monsouri (Ansari) method, if the film can flow upward along the shaft wall in the shaft, need core pressure gradient and liquid pressure gradient according to a large number of calculation convergence. The results showed that when the oil film thickness is greater than 3mm (except for the film thickness is equal to 15mm), the liquid can flow upward along the wellbore wall, heavy oil can be taken to the ground.

【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE345;TE31

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 舒福昌;史茂勇;向興金;;聚合物作為稠油降粘劑的實(shí)驗(yàn)研究[J];應(yīng)用化工;2007年06期

2 韓曉強(qiáng);李愛軍;劉瓊;;稠油含水對(duì)粘度影響探討[J];新疆石油科技;2010年04期

，

本文編號(hào)：1410412