本文選題：弱堿三元體系 + 注入能力　； 參考：《東北石油大學》2017年碩士論文

【摘要】：三元復合驅(qū)可以提高驅(qū)替體系的驅(qū)油效率和波及體積,同時具有較低的界面張力、較好的粘穩(wěn)性和乳化性能而已經(jīng)成為大慶油田的主導開采技術(shù)。大量的實驗表明,強堿三元驅(qū)油體系對地層以及驅(qū)油設(shè)備傷害較大,已是一種不建議應(yīng)用的驅(qū)油方式,但三元體系對水后采收率的提高作用較為明顯,所以本文針對大慶某區(qū)塊東部過渡帶滲透率和原油特性篩選出弱堿三元復合體系最優(yōu)體系驅(qū)油配方。本文在對三元驅(qū)油機理進行了一定分析的基礎(chǔ)上,對弱堿三元復合體系的各項性能,主要包括弱堿三元體系界面特性、粘穩(wěn)性、乳化特性、吸附特性等方面進行了研究評價,并在實驗中通過研究不同堿、表活劑濃度對三元體系各項性能的影響,進行了初步優(yōu)選,實驗結(jié)果表明了弱堿三元體系可在堿濃度為1.0%～1.2%,活性劑濃度大于0.2%之后,可以達到10-3mN/m的超低界面張力。隨后開展了聚合物分子量、濃度和巖心滲透率匹配關(guān)系的室內(nèi)實驗研究,計算了弱堿三元體系的阻力系數(shù)、殘余阻力系數(shù)等參數(shù),給出了弱堿三元體系與東部過渡帶油層滲透率的適應(yīng)性關(guān)系。通過室內(nèi)物理模擬驅(qū)油實驗,對比分析了三元復合驅(qū)不同主段塞、副段塞、前置段塞、后續(xù)保護段塞驅(qū)油效果,最終優(yōu)選出弱堿三元復合驅(qū)最優(yōu)體系配方:前置段塞:0.03PV×[1500mg/L 1600×10~4HPAM];三元主段塞:0.35PV× [0.2%WPS+1.2%Na_2CO_3+2000mg/L 1600×10~4HPAM];三元副段塞:0.15PV× [0.1%WPS+1.0%Na_2CO_3+2000mg/L 1600×10~4HPAM];后續(xù)保護段塞:0.2PV×[1500mg/L 1600×10~4HPAM]。
[Abstract]:ASP flooding can improve the displacement efficiency and sweep volume of the flooding system, and has low interfacial tension, better viscosity and stability and emulsification performance, which has become the dominant production technology in Daqing Oilfield. A large number of experiments show that the ternary flooding system of strong alkali has great damage to formation and oil displacement equipment, and it is a kind of oil displacement mode which is not recommended to be applied, but the effect of ternary system on the enhancement of water recovery is obvious. In this paper, based on the permeability and crude oil characteristics of the transition zone in the eastern part of Daqing block, the optimum flooding formula of the weak alkali ternary system is selected. Based on the analysis of ternary flooding mechanism, the properties of weak base ternary composite system, including interface property, viscosity stability, emulsification property and adsorption property of weak base ternary system are studied and evaluated in this paper. In the experiment, the effects of different alkali and active agent concentration on the properties of the ternary system were studied. The experimental results show that the weak base ternary system can be obtained when the alkali concentration is 1.0% and the active agent concentration is more than 0.2%. The ultra-low interfacial tension of 10-3mN/m can be achieved. Subsequently, laboratory experiments were carried out on the matching relationship between polymer molecular weight, concentration and core permeability. The resistance coefficient, residual resistance coefficient and other parameters of weak alkali ternary system were calculated. The adaptability relationship between the weak alkali ternary system and the permeability of the eastern transitional zone is given. Through the laboratory physical simulation of oil displacement experiments, the flooding effects of different main slug, secondary slug, front slug and follow-up protection slug of ASP flooding are compared and analyzed. Finally, the optimal formulation of weak base ASP flooding system is selected as follows: preposition slug 0.03PV 脳 [1500mg/L 1600 脳 10~4HPAM]; ternary main slug: 0.35PV 脳 [0.2%WPS 1.2%Na_2CO_3 2000mg/L 1600 脳 10~4HPAM]; ternary secondary slug: 0.15PV 脳 [0.1%WPS 1.0%Na_2CO_3 2000mg/L 1600 脳 10~4HPAM]; follow-up protection slug: 0.2PV 脳 [1500mg/L 1600 脳 10~4HPAM].
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE357.46

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本文編號：1958180