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北海的许多油田,由于井眼附近硫酸钡后的堆积,严重地影响了射孔孔眼和生产油管,从而影响了油井产量。垢是由于扫油的富含硫的海水与含高浓度钡离子的地层水混合产生的。解决的办法通常是定期地向地层“挤压”防垢化学药品,以阻止垢的形成。挤注过程中,防垢剂注入生产井径向几英尺范围内,以吸附和/或少量溶解沉淀的形式滞留在地层中,经过一段时间,防垢剂缓慢渗透到采出水中,从而达到预防油井结垢的目的。但是,某些情况下,防垢剂与油层基岩的结合滞留效果很差,挤压寿命短。结果导致频繁的修井,影响了井的开采,降低了产能。对解决这个问题,英国石油(BP)勘探公司和BP化学制品公司联合开发研制一种防垢挤压增强剂,既可增强防垢剂的滞留能力,又可向油层释放防垢剂。该项技术首次在英国的马格努斯油田推广应用。结果证明:该项技术不仅使地层吸附化学药品的挤压寿命提高一倍以上。而且通过降低油井停产修产的频率和连续关井时间,节省了大量资金。
Many oilfields in the North Sea affect the production of wells due to the subsequent accumulation of barium sulfate near the borehole that has a serious impact on perforation and production tubing. Scale is due to sweeping of sulfur-rich seawater with high concentrations of barium ions produced by mixing formation water. The solution is usually to “squeeze” scale control chemicals into the formation regularly to stop scale formation. During the extrusion process, the scale inhibitor is injected into the production well a few feet in the radial direction and is retained in the formation in the form of adsorption and / or small amount of dissolved precipitate. After a period of time, the scale inhibitor slowly permeates into the produced water to achieve prevention The purpose of the well scaling. However, in some cases, the combination of anti-scale agent and bedrock of oil reservoirs is ineffective and the extrusion life is short. As a result, frequent well interventions have affected well production and decreased capacity. In order to solve this problem, BP Exploration Company and BP Chemicals Company have jointly developed an anti-scaling extrusion enhancer, which can enhance the retention capacity of anti-scaling agent and release anti-scaling agent to the reservoir. The technology for the first time in the Magnus field in the United Kingdom promote the application. The results show that: the technology not only to promote the extrusion life of the adsorbed chemical chemicals more than doubled. And it saves a lot of money by reducing the frequency of shutdown and shut-in and the time of continuous shut-in.