本文選題：碳酸鹽巖油藏 + 注水��； 參考：《西南石油大學(xué)》2016年碩士論文

【摘要】：FQ油藏是一個以白堊紀(jì)和第三系碳酸鹽巖油藏為主的多層系大型油藏,該油藏地質(zhì)儲量大,儲層以孔隙為主,局部發(fā)育少量裂縫,原油黏度小,地層水礦化度高,地層彈性能量充足。油藏目前以衰竭式開采為主,開采過程中,層間及層內(nèi)采液能力差異大,部分井含水上升快,老井產(chǎn)量遞減快,油藏穩(wěn)產(chǎn)難度大本文根據(jù)該油藏的基本地質(zhì)特征,利用相似原理,推導(dǎo)了孔隙型碳酸鹽巖油藏氣驅(qū)的相似準(zhǔn)則,實(shí)現(xiàn)了三維物理模型參數(shù)與油田實(shí)際參數(shù)的相互轉(zhuǎn)換,在國內(nèi)首次設(shè)計(jì)并制作了碳酸鹽巖油藏三維物理模型。模型Ⅰ相似于FQ油藏的Mishrif層,縱向上模擬正韻律沉積,平面上部署了兩口水平與三口直井,利用該模型開展了四組水驅(qū)實(shí)驗(yàn)及三組氣驅(qū)實(shí)驗(yàn)。模型Ⅱ相似于FQ油藏的Asmari層,縱向上白云巖與砂巖相間出現(xiàn),平面上部署了五口直井,利用該模型開展了三組水驅(qū)實(shí)驗(yàn)及三組氣驅(qū)實(shí)驗(yàn)。模型Ⅰ的七組實(shí)驗(yàn)分別研究了：原油是否老化對三維物理模型實(shí)驗(yàn)結(jié)果的影響；不同注水方式對油藏最終采出程度的影響；先注氣后注水的開發(fā)方式對油藏最終采出程度的影響；注天然氣與注氮?dú)怛?qū)油效率的高低；頂部注氣與底部注氣兩種注氣方式驅(qū)油效率的高低。模型Ⅱ六組實(shí)驗(yàn)分別研究了：先衰竭式開采后注水開采與不衰竭式開采而直接注水開采的兩種開發(fā)方式對薄互層油藏最終采出程度的影響；水驅(qū)后期提高采液速度的穩(wěn)產(chǎn)效果；注天然氣、注氮?dú)庖约癈O2多井協(xié)同吞吐+CO2驅(qū)三種注氣方式驅(qū)油效率的高低；注水中期轉(zhuǎn)注氣提高油藏采收率的效果。通過三維物理模擬實(shí)驗(yàn)研究,結(jié)合油藏工程方法,進(jìn)行了水驅(qū)特征曲線研究、油水相滲實(shí)驗(yàn)研究以及采出程度與含水率變化規(guī)律研究,研究結(jié)果表明：衰竭式開采可以延長無水采油期,提高碳酸鹽巖油藏采收率；水平井與直井聯(lián)合開采可以提高掃油效率,從而提高油藏采收率；注氣后注水可以擴(kuò)大注入介質(zhì)的波及體積；注水后注氣可以有效降低油藏含水率,減慢含水上升速度；三種氣體中,注CO2驅(qū)油效率最高,但是CO2易腐蝕管線,氮?dú)鉄o腐蝕性。通過三維物理模擬實(shí)驗(yàn),結(jié)合注入油與采出油黏度測定、色譜分析,得到這類油藏注氣提高采收率的主要機(jī)理為：擴(kuò)大波及體積、控水增油、降低原油黏度、疏通油流通道、降低界面張力、萃取輕烴組分。本文研究得出孔隙型碳酸鹽巖油藏采用衰竭式開采+注水開采+氣水交替開采的開發(fā)效果較為理想,可用于油藏實(shí)際。
[Abstract]:The FQ reservoir is a large multilayer reservoir mainly composed of Cretaceous and Tertiary carbonate rocks. The reservoir has large geological reserves, mainly porosity, a small number of fractures, low viscosity of crude oil and high salinity of formation water. The elastic energy of the formation is sufficient. At present, the reservoir is dominated by depleted production. In the process of production, there are great differences in the recovery capacity between layers and in layers, the water cut of some wells rises rapidly, the production of old wells decreases rapidly, and the stable production of the reservoir is difficult to stabilize according to the basic geological characteristics of the reservoir. By using the similarity principle, the similarity criterion of gas drive in porous carbonate reservoir is deduced, and the three dimensional physical model parameters are converted to the actual oil field parameters for the first time in China. The three-dimensional physical model of carbonate reservoir is designed and made for the first time in China. Model I is similar to the Mishrif layer in FQ reservoir and simulates the positive rhythm deposition longitudinally. Two horizontal and three straight wells are deployed on the plane. Four groups of water drive experiments and three sets of gas drive experiments are carried out using the model. Model 鈪，

本文編號：2074987