本文關(guān)鍵詞： 吳起油田 清污混注 水質(zhì) 研究 應(yīng)用　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：吳起油田是一個低滲、特低滲的低壓未飽和油氣田,特低滲透油藏的油氣儲量在其油田中占有相當(dāng)大的比重,注水開發(fā)后,對注入水的水質(zhì)要求很高。由于油田尚處注水開發(fā)的初期,油井產(chǎn)出污水量不足,必須輔之以清水或其他水源,但由于清、污水以及不同油層地層水水性的不同,混合后極易產(chǎn)生腐蝕和結(jié)垢現(xiàn)象,給油田生產(chǎn)帶來極為不利的影響。針對此問題,現(xiàn)根據(jù)吳起采油廠18號注水站清污混注現(xiàn)狀研究,通過對吳起油田水質(zhì)分析,洛河層清水與地層水配合性、清污水混合處理后水質(zhì)腐蝕性、結(jié)垢性實驗研究。再通過對清污混合處理后注入水與地層水配伍性及注入地層后儲層敏感性實驗研究,最后得出最佳洛河層水與地層水混合比例及相應(yīng)的注入層位,進(jìn)而對18號注水站清污混注工藝進(jìn)行了優(yōu)化,系統(tǒng)解決了清污兩大不配伍水源在注入過程的腐蝕和結(jié)垢問題,實現(xiàn)了水質(zhì)的系統(tǒng)達(dá)標(biāo),給吳起油田特低滲透油藏的注水開發(fā)奠定了良好的水質(zhì)基礎(chǔ)。
[Abstract]:Wuqi Oilfield is a low-pressure unsaturated oil and gas field with low permeability and very low permeability. The oil and gas reserves of ultra-low permeability reservoirs account for a large proportion of the oil and gas fields in Wuqi Oilfield. After waterflooding, The water quality of injected water is very high. Since the oil field is still in the early stage of water injection development, the amount of sewage produced by oil wells is insufficient and must be supplemented with clear water or other water sources, but due to the differences in water quality of clean water, sewage and formation water of different oil layers, It is easy to produce corrosion and scaling phenomenon after mixing, which has a very adverse effect on the production of oil fields. In view of this problem, according to the study on the current situation of sewage mixing and injection at No. 18 Water injection Station of Wuqi Oil production Plant, the water quality of Wuqi Oilfield is analyzed. The compatibility of clean water and formation water in Luohe formation, the corrosion of water quality and scaling after mixed treatment of clean water, and the compatibility of injected water with formation water after mixed treatment of sewage and formation water, and the reservoir sensitivity after injected into the formation are studied experimentally. Finally, the optimum mixing ratio of Luohe formation water and formation water and the corresponding injection layer are obtained, and then the sewage mixing and injection process of No. 18 water injection station is optimized. The problems of corrosion and scaling in the injection process of the two uncompatible water sources for cleaning pollution are systematically solved. The system of water quality is up to standard, which lays a good water quality foundation for water injection development of very low permeability reservoirs in Wuqi Oilfield.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.6

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本文編號：1516326