【摘要】：目前,大部分油田已進(jìn)入石油開(kāi)采的中期和后期,原油含水率可高達(dá)90%。油水分離產(chǎn)生大量的含油污水,這部分水資源可以經(jīng)過(guò)處理作為油田回注水水源。本論文針對(duì)大慶油田采油七廠采出水的水質(zhì)特點(diǎn),對(duì)該油田采出水進(jìn)行處理,總體把握工程設(shè)計(jì)過(guò)程。油田采出水具有大量懸浮顆粒、高含油量、高COD、高礦化度以及含有微生物等特性。本次設(shè)計(jì)有混凝氣浮系統(tǒng)、預(yù)過(guò)濾系統(tǒng)、超濾系統(tǒng)。其中混凝氣浮系統(tǒng)和預(yù)過(guò)濾系統(tǒng)是進(jìn)入超濾系統(tǒng)處理階段前的預(yù)處理,目的是去除部分水中顆粒物,使進(jìn)水水質(zhì)達(dá)到進(jìn)入超濾膜系統(tǒng)的水質(zhì)要求;而超濾膜系統(tǒng)則是去除水中含油、微生物、COD以及剩下的懸浮顆粒,最終實(shí)現(xiàn)處理后的油田采出水達(dá)到回注的要求。
[Abstract]:At present, most oil fields have entered the middle and late stages of oil production, the water cut of crude oil can be as high as 90%. Oil-water separation produces a large amount of oily sewage, which can be treated as water source for oilfield water injection. In this paper, according to the characteristics of produced water quality in No.7 Oil recovery Plant of Daqing Oilfield, the produced water of Daqing Oilfield is treated, and the engineering design process is generally grasped. Oilfield produced water has a large number of suspended particles, high oil content, high COD, high salinity and microorganism. This design has coagulation air flotation system, pre-filtration system, ultrafiltration system. The coagulation air flotation system and the pre-filtration system are pre-treated before entering the ultrafiltration system. The purpose is to remove some of the particles in the water and make the influent water quality meet the water quality requirements of the ultrafiltration membrane system. The ultrafiltration membrane system is to remove the oil, microbial COD and the remaining suspended particles in the water, so that the treated oilfield produced water can meet the requirements of injection.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X741

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本文編號(hào)：2138534