本文選題：污水處理 + 含劑濃度��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：大慶油田薩北開(kāi)發(fā)區(qū)現(xiàn)已全面大規(guī)模進(jìn)入三元復(fù)合驅(qū)油開(kāi)采開(kāi)發(fā)階段,取得了顯著提高原油采收率的效果,但在提高原油采收率的同時(shí),也隨之產(chǎn)生了大量的三元驅(qū)采出污水。通過(guò)現(xiàn)場(chǎng)應(yīng)用發(fā)現(xiàn),聚合物驅(qū)采出污水處理難度較水驅(qū)采出污水處理難度增大,而三元復(fù)合驅(qū)采出污水的處理難度更大。而三元復(fù)合驅(qū)采出污水中的堿、表面活性劑和聚合物大量存在,使得含有不同化學(xué)劑的三元采出污水成為一種更加復(fù)雜的污水體系,采出液粘度增大,原油乳化嚴(yán)重,這些現(xiàn)象和問(wèn)題的出現(xiàn)使得污水處理變得非常困難,同時(shí)在其他區(qū)塊由于在開(kāi)采過(guò)程中隨著聚合物在地層的擴(kuò)散,也造成了周邊水驅(qū)地層聚合物受效,使水驅(qū)采出液中見(jiàn)聚合物濃度越來(lái)越高�，F(xiàn)油田急需將這些污水進(jìn)行處理,在避免污染環(huán)境的同時(shí),將污水處理合格后作為回注水使用。因此針對(duì)這些問(wèn)題通過(guò)室內(nèi)沉降實(shí)驗(yàn),了解不同含劑濃度對(duì)含油污水沉降處理效果的影響因素。利用建立的室內(nèi)可視化兩級(jí)過(guò)濾裝置,模擬聚驅(qū)污水和水驅(qū)污水混摻實(shí)驗(yàn),同時(shí)模擬薩北開(kāi)發(fā)區(qū)現(xiàn)有水驅(qū)污水處理工藝技術(shù)處理含聚污水,并確定含聚污水的處理工藝界限。實(shí)驗(yàn)研究結(jié)果表明:污水水質(zhì)、污水沉降時(shí)間、沉降溫度以及含劑濃度的多少都對(duì)油田三元污水的沉降處理效果產(chǎn)生了影響;通過(guò)測(cè)得污水中的含油和懸浮物含量,最終確定三元污水與聚驅(qū)污水的最佳混摻比例為1:3,最佳混摻沉降時(shí)間界限為8h。通過(guò)可視模擬過(guò)濾裝置模擬了水驅(qū)與聚驅(qū)污水的混摻過(guò)濾過(guò)程,研究了不同濾料級(jí)配、過(guò)濾速度、混摻比例對(duì)過(guò)濾處理后混摻污水的含油量、懸浮物含量的影響,確定了過(guò)濾速度的最佳界限范圍為10m/h-12m/h,最佳濾料級(jí)配為級(jí)配三,在這樣的過(guò)濾條件下,水驅(qū)與聚驅(qū)混摻污水過(guò)濾后達(dá)均可以達(dá)到水質(zhì)指標(biāo)要求,即含油≤5mg/L,懸浮物≤5mg/L。
[Abstract]:The Sabei Development Zone of Daqing Oilfield has now entered the stage of ASP flooding exploitation on a large scale, and has achieved a remarkable effect of improving oil recovery, but at the same time, it has also produced a large amount of sewage produced by ternary flooding. It is found through field application that it is more difficult to treat wastewater produced by polymer flooding than that by water flooding, but it is more difficult to treat sewage produced by ASP flooding. However, the presence of alkali, surfactant and polymer in the sewage produced by ASP flooding makes the ternary sewage produced with different chemical agents become a more complex sewage system, the viscosity of the produced liquid increases and the crude oil is emulsified seriously. These phenomena and problems have made it very difficult to treat sewage, and in other blocks, because of the diffusion of polymers in the formation during the exploitation process, it has also resulted in the polymer efficiency in the surrounding water-drive formation. The polymer concentration is higher and higher in the water drive production liquid. It is urgent for the oilfield to treat the wastewater, which can be used as water injection after qualified treatment while avoiding the pollution of the environment. In order to solve these problems, the influence factors of different concentration of agent on the settlement effect of oily sewage were studied through indoor settlement experiments. The laboratory visualization two-stage filtration device is used to simulate the mixing experiment of polymer flooding sewage and water drive sewage. At the same time, the existing water drive wastewater treatment technology in Sabi Development Zone is simulated, and the technical limit of polymer sewage treatment is determined. The experimental results show that the water quality, settling time, settling temperature and the concentration of the agent have an effect on the settlement of ternary sewage, and the content of oil and suspended matter in the sewage is measured. Finally, the optimum mixing ratio of ternary sewage and polymer flooding wastewater is 1: 3, and the optimum mixing time limit is 8 h. The mixed filtration process of water drive and polymer flooding sewage was simulated by visual simulation filter device. The effects of different filter media gradation, filtration speed and mixing ratio on oil content and suspended matter content of mixed sewage after filtration treatment were studied. The optimum filtration speed is determined to be 10 m / h-12 m / h, and the best filter material gradation is three. Under such filtering conditions, the water flooding and polymer flooding mixed with sewage can reach the water quality requirements, that is, oil content 鈮，

本文編號(hào)：1845867