华北油田地层水与注入水结垢趋势预测及影响因素

发布时间：2018-03-11 03:11

本文选题：结垢　切入点：预测　出处：《岩性油气藏》2017年04期 　论文类型：期刊论文

【摘要】：在注水开发过程中,油层或采出系统结垢会大大影响生产效率。开展地层水与注入水结垢规律和机理研究,可对现场除垢技术提供理论指导。采用Davis-Stiff饱和指数法和Ryznar稳定指数法,对华北油田京11区块地层水和注入水在不同温度、p H和成垢离子质量浓度等影响因素下的结垢趋势进行了预测,同时开展静态结垢实验研究了模拟水样的结垢规律。结果表明:华北油田京11区块地层水和注入水的离子组成和质量浓度非常接近且均具有严重的结垢趋势,且地层水的结垢趋势略高于注入水,垢样主要为碳酸钙;模拟水样的实际结垢率可达61%;温度、p H以及成垢离子质量浓度的升高均能大幅提高模拟水样的结垢率,结垢率的增长幅度随温度和p H的升高逐渐增大,而随成垢离子质量浓度的升高逐渐减小。
[Abstract]:In the process of water injection development, scaling in reservoir or production system will greatly affect production efficiency. The scaling law and mechanism of formation water and injection water are studied. Davis-Stiff saturation index method and Ryznar stability index method are used. The scaling tendency of formation water and injected water in Block Jing11 of Huabei Oilfield is predicted under the influence factors such as temperature pH and mass concentration of scale forming ions. At the same time, static scaling experiments were carried out to study the scaling law of simulated water samples. The results show that the ion composition and mass concentration of formation water and injected water in Block Jing11 of Huabei Oilfield are very close and have a serious scaling trend. Moreover, the scaling tendency of formation water is slightly higher than that of injected water, the scaling sample is mainly calcium carbonate, the actual scaling rate of simulated water samples can reach 61%, and the increase of temperature pH and the mass concentration of scaling ions can greatly increase the scaling rate of simulated water samples. The increasing range of scaling rate increases with the increase of temperature and pH, but decreases with the increase of mass concentration of scale forming ions.
【作者单位】：中国石油华北油田分公司采油工程研究院;中国石油大学(华东)理学院;
【基金】：中国石油天然气股份公司重大科技专项“注入介质腐蚀结垢影响、预测及治理技术研究”(编号:2014E-3507)资助
【分类号】：TE357.6

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