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摘要? 與同心雙管注飽和蒸汽不同,，同心雙管注過熱型多元熱流體過程中,，無接箍油管與環(huán)形空間之間的熱量交換可引起流體溫度迅速變化。在充分考慮同心雙管井筒內(nèi)部熱量傳遞的基礎(chǔ)上,，利用能量和動(dòng)量守恒方程,，結(jié)合海水?dāng)_流的井筒外傳熱模型，建立了海上同心雙管注過熱型多元熱流體井筒傳熱模型,。利用有限差分和迭代方法計(jì)算得到了無接箍油管和環(huán)形空間內(nèi)過熱型多元熱流體的流動(dòng)典型曲線,，現(xiàn)場數(shù)據(jù)驗(yàn)證表明該模型具有良好的實(shí)用性。研究結(jié)果表明：該模型適用于不同注汽參數(shù)下同心雙管井筒中熱物性參數(shù)的分布預(yù)測,，并可對(duì)海上SAGD及多元熱流體吞吐的注汽參數(shù)進(jìn)行優(yōu)化,；無接箍油管與環(huán)形空間的較小溫差即可導(dǎo)致大量熱能流動(dòng)，引起溫度和過熱度迅速變化,；海水流動(dòng)對(duì)井筒熱損失有顯著影響,；隨著非凝結(jié)氣質(zhì)量分?jǐn)?shù)增加，井筒內(nèi)溫度和過熱度均下降,。

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關(guān)鍵詞 ：海上稠油油藏, 同心雙管, 非凝結(jié)氣輔助過熱蒸汽, 熱物性參數(shù)分布, 海水?dāng)_流

Abstract：

　　Thermal transmission inside a concentric dual-tubing well (CDTW) with superheated multi-components thermal fluid (SMTF) injection causes a rapid change of temperature and degree of superheating in each tube, which is different from saturated steam injection in CDTW. With consideration of the heat transmission between the integral joint tubing (IJT) and the annulis, a mathematical model is established based on mass, energy and momentum conservation equations. Type curves of superheated multi-components thermal fluid flow in the IJT and annulis are obtained by using a finite difference method and an iteration technique. Then, the predicted results from the model are compared with field data. The results show that the model is applicable to predict thermophysical properties of SMTF in CDTW with different injection parameters. Besides, the model is useful to optimize injection parameters during offshore steam-assisted gravity drainage (SAGD) and cyclic steam stimulation (CSS) processes. A small temperature difference between the IJT and annulis will lead to a large amount of heat flow, which causes a rapid change of temperature and degree of superheating in the CDTW. The flow of seawater has a significant influence on the wellbore heat loss rate. Both the temperature and superheating degree decrease with an increasing content of non-condensing gas.

Key words： offshore heavy oil recovery concentric dual-tubing well superheated multi-components thermal fluid thermophysical properties distribution turbulent flow of seawater

收稿日期: 2016-12-09 ????

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基金資助:中國海洋石油總公司海洋石油高效開發(fā)國家重點(diǎn)實(shí)驗(yàn)室第三批開放基金課題“稠油熱采流動(dòng)規(guī)律主要影響因素分析”(2015-YXKJ-001),，國家自然基金項(xiàng)目(編號(hào)：51490654),，國家科技重大專項(xiàng)(編號(hào)：2016ZX05039)和國家科技重大專項(xiàng)(編號(hào)：2016ZX05042)聯(lián)合資助

通訊作者: 姚約東, [email protected]

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孫逢瑞,，姚約東，李相方,，李駿,，李賀，孫政. 海上同心雙管注過熱型多元熱流體井筒傳熱數(shù)值模擬[J]. 石油科學(xué)通報(bào), 2017, 2(3): 377-389. SUN Fengrui, YAO Yuedong, LI Xiangfang, LI Jun, LI He, SUN Zheng. Numerical simulation of superheated multi-components thermal fluid flow in offshore concentric dual-tubing wells. Petroleum Science Bulletin, 2017, 2(3): 377-389.

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