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首页> 外文会议>SPE international symposium and exhibition on formation damage control >Development of a Novel Alcoholic Acid System for Removal Damage Resulting fromHydraulic Fracturing in the Tight Gas Reservoir
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Development of a Novel Alcoholic Acid System for Removal Damage Resulting fromHydraulic Fracturing in the Tight Gas Reservoir

机译：新型醇酸体系的开发，以消除致密气藏中的水力压裂造成的损害

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This paper presents a novel alcoholic acid system toremove the damage caused by frac fluid in tight gas reservoir.Damage resulting from hydraulic fractures takes two distinctforms: damage inside the fracture itself because of inadequatebreaking of the fracturing fluid polymer; and fracture-facedamage because of excessive leak-off. The objectives oflaboratory experiments are to identify potential damage andaid selection of the optimum treatment fluid and design. Anovel alcoholic acid flow tests illustrated the permeabilityincreased because of pore & throat enlarged by using mercuryintrusion experiments. It was critical in addressing issues ofselection of fracturing fluids, polymer concentrations andbreakers. Improved breaker systems show even greater benefitwhen used in conjunction with the lower loading polymersystems. The newer fluid systems enhance load recovery andreduce formation exposure to potentially damagingpolymer residue.DB gas reservoir is a low porosity, low permeabilityreservoir in the northwest of China. Large scale of hydraulicFracturing has been carried out as effective method to get highgas production rates. However, the gas production rate aftertreatment increased to 335,683m3/d, and then declined to34,875m3/d rapidly. The skin factor from well testing afterhydraulic fracturing was 112, which indicated fractures andformation may appear damaged seriously because of morethan 60% of the load fluid can be invaded and trapped in theformation by entering the smaller capillary pores during higherinjection pressures. The gas production rate recovered from32,383m3/d to 301,374m3/d and kept constantly by usingtreatment method of a novel alcoholic acid system.
机译：本文提出了一种新型的乙醇酸体系 消除致密储气罐中压裂液造成的损坏。 水力压裂造成的损坏有两个明显的区别 形式：由于不充分而在骨折本身内部造成的损害 压裂液聚合物的破坏;和骨折面 泄漏过多会造成损坏。的目标 实验室实验是为了识别潜在的损害并 帮助选择最佳的处理液和设计。一种 新型乙醇酸流动试验说明了渗透性 由于使用汞增加了毛孔和喉咙，因此增加了 入侵实验。对于解决以下问题至关重要 选择压裂液，聚合物浓度和 破碎机。改进的断路器系统显示出更大的优势 当与低载量聚合物一起使用时 系统。较新的流体系统增强了负载恢复能力，并且 减少地层遭受潜在破坏的风险 聚合物残留物。 DB气藏是低孔隙度，低渗透率 中国西北的水库。大型液压 压裂已被用作提高断层的有效方法 天然气生产率。但是，之后的产气率 处理量增加到335,683m3 / d，然后下降到 快速达34,875立方米/天。试井后的皮肤因子 水力压裂为112，表明有裂缝和 岩层可能由于更多而严重受损 超过60％的负载流体会被侵入并截留在 较高的过程中通过进入较小的毛细孔形成 注射压力。从 32,383m3 / d至301,374m3 / d并通过使用保持恒定 新型醇酸体系的化学处理方法。

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