【摘要】：崖城13-1氣田為典型的高溫高壓凝析氣藏,開發(fā)過程中未見水氣井水氣比持續(xù)上升,但產生原因不明。選取該氣田2口典型井A4、A8井樣品,通過室內實驗模擬研究了地層壓力和CO_2含量對凝析氣中水汽含量的影響,結果表明:當地層壓力從38 MPa降至3 MPa時,A4井地層流體中水氣比由0.16 m~3/10~4m~3增加到1.07 m~3/10~4m~3,其中低壓階段(地層壓力從12 MPa降至3 MPa)水汽含量上升量占整個階段的71.64%;凝析氣中CO_2含量從8%增加到35.39%時,初始水氣比從0.24 m~3/10~4m~3增加到0.43 m~3/10~4m~3。在室內實驗的基礎上,建立了凝析氣中水汽含量與主要影響因素的二維關系,通過Levenberg-Marquardt方法擬合得到了崖城13-1氣田凝析水含量預測經驗關聯(lián)式,實例應用中預測結果與實際生產數據吻合程度較高。本文預測公式可用于崖城13-1氣田氣井凝析水產出規(guī)律預測、氣井產水來源判斷,以及對水侵井進行水侵動態(tài)分析等。
[Abstract]:The 13-1 gas field of YC13-1 is a typical high-temperature and high-pressure condensate gas reservoir. The gas ratio of water-gas well water is not seen in the development process, but the cause is unknown. The effect of formation pressure and CO _ 2 content on the content of water vapor in condensate gas is studied by laboratory simulation. The results show that when the formation pressure is reduced from 38 MPa to 3 MPa, the water-gas ratio in the formation fluid of the A4 well is increased from 0.16m ~ 3/ 10 ~ 4m ~ 3 to 1.07 m ~ 3/ 10 ~ 4m ~ 3. in that low-pressure stage (the formation pressure drop from 12 MPa to 3 MPa), the increase of the water vapor content is 71.64% of the whole stage; when the content of CO _ 2 in the condensate gas is increased from 8% to 35. 39%, the initial water-gas ratio is increased from 0.24m ~ 3/ 10 ~ 4m ~ 3 to 0.43m ~ 3/ 10 ~ 4m ~ 3. On the basis of the laboratory experiment, the two-dimensional relation between the water vapor content and the main influencing factors in the condensate gas is established, and the empirical correlation formula of the condensate water content prediction of the YC13-1 gas field is obtained by the Levenberg-Marquardt method, and the prediction result in the case application is in good agreement with the actual production data. The prediction formula of this paper can be used in the prediction of the formation of the condensate in the gas well of YC13-1 gas field, the determination of the water source in the gas well, and the dynamic analysis of the water invasion in the water-cut well.
【作者單位】： 中海石油(中國)有限公司湛江分公司;西南石油大學石油與天然氣工程學院;
【基金】：“十二五”國家科技重大專項“海上油田叢式井網整體加密及綜合調整技術(編號:2011ZX05024-002-005)”部分研究成果
【分類號】：TE372

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