定边采油区块非同层产出液混采与混输工艺的可行性研究

发布时间：2018-05-13 13:59

本文选题：结垢 + 配伍性　；参考：《西安石油大学》2015年硕士论文

【摘要】：目前,在陕北的长庆油田、延长油田都存在着同一区块不同层位采出水混合开采、混合输送和回注现象,而且已经成为这些油田普遍采用的处理工艺,但结垢已经成为了大部分油田普遍遇到的问题。如果未通过配伍性实验进行评价,将两种不配伍的采出水进行混合开采和输送或将不配伍的混合水作为注入水进行回注,将会导致管线和设备的大量结垢和腐蚀,降低了储层的渗透率,对油田的正常生产开发造成不可扭转的伤害。如何解决采出水在混合过程中的结垢问题,是产出液混采混输和采出水回注处理重点研究的内容之一。本文应用SY/T5523-2006标准,对定边不同区块非同层采出水进行了配伍性实验研究,以离子失去量和结垢量为考察指标,以地面混合后的混配水作为回注水源,进行红柳沟区块非同层采出水回注可行性研究,新安边区块采出水与清水的混注可行性研究,油房庄区块和周长区块非同层产出液混采混输工艺可行性研究,结果表明:对红柳沟区块采出水进行回注可行性研究,主要结垢类型为碳酸钙。最大结垢比例为4:6,作为地面混合比例。絮凝后混合水与地层水进行配伍性实验,无明显结垢,配伍性较好,达到回注标准。对清水与地层水进行混注可行性研究,主要结垢类型为硫酸钡和硫酸锶。最大结垢比例为2:8,作为地面混合比例。絮凝后混合水与地层水进行配伍性实验,无明显结垢,配伍性较好,回注工艺可行。对油房庄和周长区块不同层位产出液进行混采混输可行性研究,混合后均大量结垢,只能分层开采和输送。絮凝后混合水与地层水进行回注可行性研究,无明显结垢,配伍性较好,达到回注标准。
[Abstract]:At present, in Changqing Oilfield of Northern Shaanxi, Yanchang Oilfield has mixed production, mixed transportation and back injection of different produced water in the same block, and has become a widely used treatment process in these oilfields. But scaling has become a common problem in most oilfields. If the mixture is not evaluated by compatibility experiments, the mixed extraction and transportation of two uncompatible effluent or the return injection of unmixed water as injected water will result in a large amount of scaling and corrosion of pipelines and equipment. The permeability of the reservoir is reduced and irrevocable damage is caused to the normal production and development of the oil field. How to solve the scaling problem of produced water in the mixing process is one of the key contents of the research on mixed production and transportation of produced water and reinjection treatment of produced water. In this paper, SY/T5523-2006 standard is used to study the compatibility of inhomogeneous produced water in different blocks of Dingbian. The ion loss and scaling amount are taken as the index, and the mixed water after surface mixing is used as the water source for reinjection. Feasibility study on reinjection of non-same layer produced water in Hongliugou block, mixed injection of produced water and clear water in Xinanbian block, feasibility study on mixed production and transportation technology of non-identical production liquid in Fangzhuang block and Zhouchang block, The results show that the main scaling type is calcium carbonate. The maximum scaling ratio is 4: 6, as the ground mixing ratio. The compatibility experiment of mixed water and formation water after flocculation shows that there is no obvious scaling and the compatibility is good, which reaches the standard of backinjection. The feasibility of mixing clean water with formation water is studied. The main scaling types are barium sulfate and strontium sulfate. The maximum scaling ratio is 2: 8, as the ground mixing ratio. The compatibility experiment of mixed water and formation water after flocculation shows that there is no obvious scaling, and the compatibility is good, and the reinjection process is feasible. The feasibility of mixed production and transportation of different layers of production liquid in Youfangzhuang and Zhouchang blocks is studied. After mixing a large amount of scale can only be produced and transported by stratification. The feasibility study of reinjection of mixed water and formation water after flocculation shows that there is no obvious scaling and the compatibility is good.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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