本文關(guān)鍵詞：稠油在水基泡沫作用下的管流特性研究　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 水基泡沫 硅油 減阻 壓降模型 數(shù)值模擬

【摘要】：隨著常規(guī)原油的不斷開采,稠油在石油資源中的地位和作用日益增大。但常用的稠油集輸工藝基本都是基于稠油的整體降黏,因此處理過(guò)程中必然存在能耗與運(yùn)行費(fèi)用高、加劑或摻水/稀油量多、處理量大等問(wèn)題。在微氣泡減阻理論的啟示下,模擬研究了稠油在水基泡沫潤(rùn)滑作用下的流動(dòng)性能,這為稠油管輸減阻提供了一種新的思路,對(duì)于現(xiàn)場(chǎng)實(shí)踐具有一定的理論指導(dǎo)意義。圍繞稠油在水基泡沫作用下的管流特性,以塔河稠油THCO1和201甲基硅油為研究對(duì)象,測(cè)試分析它們的基本性質(zhì),篩選出一種硅油開展模擬實(shí)驗(yàn)研究；評(píng)價(jià)不同質(zhì)量泡沫的性能后,確定一種泡沫作為潤(rùn)滑減阻實(shí)驗(yàn)的研究對(duì)象,建立泡沫潤(rùn)滑減阻的室內(nèi)研究方法,實(shí)驗(yàn)研究水平、傾斜上升及垂直上升管中水基泡沫潤(rùn)滑硅油管流的能力；通過(guò)對(duì)實(shí)驗(yàn)時(shí)硅油-泡沫的流動(dòng)形態(tài)的分析,建立不同傾斜度的管道內(nèi)硅油-泡沫流動(dòng)壓降理論模型,并將其計(jì)算值與實(shí)驗(yàn)壓降值對(duì)比分析；利用ANSYS FLUENT軟件,數(shù)值模擬研究泡沫/硅油流量比、管道傾角及泡沫質(zhì)量等因素對(duì)泡沫潤(rùn)滑減阻效果的影響,以進(jìn)一步探索實(shí)現(xiàn)泡沫潤(rùn)滑減阻的流動(dòng)條件。 研究結(jié)果表明：20℃時(shí),2#硅油可較好地作為稠油模擬油用于泡沫潤(rùn)滑減阻實(shí)驗(yàn)研究；由水基泡沫體系A(chǔ)FS-2制備的泡沫2(泡沫質(zhì)量0.5,屬于濕泡沫)較宜用于泡沫潤(rùn)滑減阻實(shí)驗(yàn)；水平管內(nèi),基本呈上部泡沫-下部硅油的分層流動(dòng),但下部有泡沫析液的潤(rùn)滑作用,且當(dāng)泡沫/硅油流量比介于0.2和0.8之間,減阻效果較好；傾斜管內(nèi)的硅油-泡沫流動(dòng)變化規(guī)律與水平管內(nèi)的類似,當(dāng)泡沫/硅油流量比超過(guò)0.3后,減阻率與其便沒有明顯關(guān)系,但均超過(guò)50%,最大的為73%；垂直管中,當(dāng)泡沫/硅油流量比達(dá)到0.22(Q0=8.33L/min左右)時(shí),減阻有明顯的效果(壓降率達(dá)到50%),當(dāng)流量比達(dá)到0.50(Q0=8.33L/min左右)時(shí),已經(jīng)形成特別完整的泡沫環(huán),減阻效果非常好(壓降率為60%以上),且隨著硅油流量增大,上述的流量比值和相應(yīng)的壓降率均小幅度增大；按照水平管硅油-泡沫分層流壓降理論模型計(jì)算得到的值與實(shí)驗(yàn)壓降值的誤差絕對(duì)值在300%以上,但在硅油流摩阻項(xiàng)引入潤(rùn)滑修正系數(shù)0.4019后,誤差降低至10%以內(nèi)；傾斜管壓降理論模型較為適用于泡沫/硅油流量比介于0.2和0.8之間的情況,傾斜角度為30°的和60°時(shí)的管流壓降理論模型計(jì)算誤差分別為±30%和±20%以內(nèi)；對(duì)于在垂直管管壁和硅油中間已形成了泡沫潤(rùn)滑隔離層的情況,其壓降理論模型的計(jì)算誤差為±40%以內(nèi)；通過(guò)數(shù)值模擬可知,不同傾斜角度的管道內(nèi),減阻效果較為理想的的泡沫/硅油流量比范圍均為0.2-0.5；垂直管內(nèi)的泡沫潤(rùn)滑減阻效果優(yōu)于水平管和傾斜管內(nèi)的；泡沫對(duì)硅油流動(dòng)的潤(rùn)滑減阻效果隨其質(zhì)量的減小而明顯增大。
[Abstract]:With the continuous exploitation of conventional crude oil, heavy oil plays an increasingly important role in oil resources, but the common heavy oil gathering and transportation technology is based on the viscosity reduction of the whole heavy oil. Therefore, there must be some problems in the process of treatment, such as high energy consumption and operation cost, more additive or water / lean oil, large treatment capacity, etc. Under the enlightenment of the theory of micro-bubble drag reduction. The fluidity of heavy oil under water-based foam lubrication is simulated and studied, which provides a new way of thinking for heavy oil pipeline drag reduction. It has a certain theoretical significance for field practice. Around the characteristics of heavy oil pipe flow under the action of water based foam, Tahe heavy oil THCO1 and 201 methyl silicon oil are taken as the research objects. After testing and analyzing their basic properties, a kind of silicone oil was selected to carry out simulation experiment. After evaluating the properties of foams of different quality, a kind of foam is selected as the object of study in lubricating drag reduction experiment, and the indoor research method of foam lubricating drag reduction is established, and the experimental research level is established. Ability of water base foam to lubricate silicone tubing flow in inclined and vertical risers; Based on the analysis of the flow pattern of silicone oil-foam in the experiment, the theoretical model of pressure drop of silicone oil-foam flow in pipeline with different inclination is established, and the calculated value is compared with the experimental pressure drop. The effects of foam / silicone oil flow ratio, pipe inclination angle and foam quality on the drag reduction effect of foam lubrication were studied numerically by using ANSYS FLUENT software. In order to further explore the flow conditions to achieve foam lubrication drag reduction. The results show that the silicon oil at 20 鈩，

本文編號(hào)：1414392