本文選題：分質(zhì)注入工具 + 黏度��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：目前大慶油田驅(qū)替技術(shù)已經(jīng)從傳統(tǒng)水驅(qū)逐漸向化學(xué)驅(qū)進(jìn)行改變,在薩中等主力區(qū)塊高滲透油層已經(jīng)基本完成了聚驅(qū),大慶油田驅(qū)替下一步目標(biāo)是對(duì)低滲透油層進(jìn)行高效開采。在原有籠統(tǒng)注入工藝技術(shù)中,由于聚合物溶液或三元復(fù)合溶液對(duì)一些油層配伍性較差,在驅(qū)替階段流向了高滲透已開采油層,達(dá)不到針對(duì)低滲透油層的開采效果。為了提高整體開發(fā)效果,充分完成對(duì)低滲透層系的原油開采,大慶油田提出了單管多層分質(zhì)分壓注入工藝技術(shù)。本文通過對(duì)流經(jīng)分質(zhì)工具前后溶液的變化進(jìn)行研究,得到相應(yīng)數(shù)據(jù),結(jié)合現(xiàn)場(chǎng)實(shí)驗(yàn)數(shù)據(jù)完成對(duì)分質(zhì)工具的結(jié)構(gòu)優(yōu)選。首先,利用FLUENT軟件,對(duì)不同結(jié)構(gòu)的分質(zhì)注入工具進(jìn)行驅(qū)替液流經(jīng)前后的流場(chǎng)分析,得出溶液流經(jīng)前后速度、壓力、湍動(dòng)能的分布情況以及相應(yīng)的參數(shù)變化,明確不同結(jié)構(gòu)工具對(duì)溶液壓力、流速、湍動(dòng)能的影響:相同條件下直徑為2mm的分注工具壓降最大;直徑越大,軸向速度維持距離越長(zhǎng);直徑越大,軸向中心線兩側(cè)湍動(dòng)能分布越均勻。其次,利用靜態(tài)力學(xué)實(shí)驗(yàn)測(cè)試驅(qū)替溶液過不同直徑分質(zhì)工具前后黏彈性變化,得出驅(qū)替溶液黏度參數(shù)變化數(shù)值并利用第一法向應(yīng)力差分析不同直徑分質(zhì)工具對(duì)流過溶液彈性影響。實(shí)驗(yàn)結(jié)果表明,溶液的粘度隨剪切速率增加而降低,并呈冪律規(guī)律;而溶液的第一法向應(yīng)力差隨剪切速率的增加逐漸增加,表現(xiàn)為線性規(guī)律;隨著聚合物質(zhì)量濃度的增加,溶液的粘彈性增高;經(jīng)過分質(zhì)工具后的溶液粘彈性與未經(jīng)處理前的溶液粘彈性規(guī)律一致,但各溶液的粘彈性均出現(xiàn)了不同程度的下降。最后,利用計(jì)算機(jī)編程技術(shù),結(jié)合溶液流過工具前后各項(xiàng)數(shù)據(jù)變化以及現(xiàn)場(chǎng)工具需求,針對(duì)化學(xué)驅(qū)分質(zhì)工具優(yōu)選進(jìn)行可視化編程,進(jìn)行現(xiàn)場(chǎng)試驗(yàn)驗(yàn)證,并得出結(jié)論:軟件具有一定準(zhǔn)確性,大大提高了工具優(yōu)選的效率以及準(zhǔn)確性。本文研究?jī)?nèi)容對(duì)油田現(xiàn)場(chǎng)分層注采過程中分質(zhì)工具的優(yōu)選提供一定的輔助指導(dǎo)意義。
[Abstract]:At present, the displacement technology of Daqing oilfield has been changed from traditional water flooding to chemical flooding, and the polymer flooding has been basically completed in the high permeability reservoir in the middle main area of sa. The next goal of displacement in Daqing oilfield is to develop the low permeability reservoir efficiently. In the original general injection technology, due to the poor compatibility of polymer solution or ternary solution to some reservoirs, it flows to the high permeability oil layer in the displacement stage, which can not reach the recovery effect for the low permeability reservoir. In order to improve the overall development effect and fully complete the crude oil production of low permeability series, Daqing Oilfield has put forward the technology of single pipe multilayer split pressure injection. In this paper, the changes of the solution before and after passing through the dividing tool are studied, the corresponding data are obtained, and the structure of the quality separation tool is optimized by combining the field experimental data. Firstly, by using fluent software, the flow field before and after the displacement fluid flow is analyzed with different structure mass separation injection tools, and the distribution of the velocity, pressure, turbulent kinetic energy and the corresponding parameters before and after the solution passing through are obtained. The influence of different structure tools on the pressure, velocity and turbulent kinetic energy of the solution is determined. The pressure drop of the injection tool with diameter 2mm is the largest under the same conditions; the larger the diameter, the longer the maintaining distance of axial velocity, the larger the diameter, the larger the pressure drop is. The distribution of turbulent kinetic energy on both sides of axial center line is more uniform. Secondly, the viscoelastic changes before and after displacing solution with different diameters were measured by static mechanical experiment. The change value of viscosity parameters of displacement solution was obtained and the effect of different diameters on the elasticity of solution was analyzed by using the first normal stress difference. The experimental results show that the viscosity of the solution decreases with the increase of the shear rate and follows the law of power law, while the first normal stress difference of the solution increases gradually with the increase of the shear rate, showing a linear rule, and with the increase of the mass concentration of the polymer, The viscoelasticity of the solution is increased, and the viscoelasticity of the solution is consistent with that of the untreated solution, but the viscoelasticity of each solution decreases to some extent. Finally, using computer programming technology, combined with the changes of the data before and after the solution flow through the tool and the field tool requirements, visual programming was carried out for the chemical flooding quality separation tools, and the field test was carried out. It is concluded that the software has certain accuracy, which greatly improves the efficiency and accuracy of tool selection. The research content of this paper provides some auxiliary guidance significance for the optimization of the quality separation tools in the field injection and production process of stratified oil fields.
【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】：2017
【分類號(hào)】：TE357.46

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本文編號(hào)：2021359