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延迟破胶及强制裂缝闭合技术的研究及应用

Drilling Fluid & Completion Fluid(2006)

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Abstract
采用延迟破胶技术,在压裂施工过程中加入不同浓度的胶囊破胶剂,利用它的延缓释放特性,使植物胶压裂液耐温、耐剪切稳定性增强,并且可以在不造成压裂液的流变性、滤失性和携砂性等过早丧失的前提下高浓度使用胶囊破胶剂.该技术与常规破胶技术相比,延缓释放率达50%,能更有效地清除液体残渣,减少压裂液对储层的伤害.同时由于有延缓破胶的特性,放喷采用相应的措施,可以降低支撑剂沉降速度,形成较好的沉砂剖面,提供高的裂缝导流能力,并且可以降低滤饼和压裂液残渣的伤害.
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Key words
capsule breaker,delayed break,ammonium persulfate,fracturing fluids
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