Fracturing method for improving formation pressure

The invention discloses a fracturing method for improving formation pressure. The fracturing method sequentially comprises an energizing fracturing fluid stage, a prepad fluid stage, a sand-carrying fluid stage and a displacement fluid stage; in the energizing fracturing fluid stage, energizing frac...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: QI YIN, YANG JUNXIA, DA YINPENG, WANG FEI, WU FURANG, LIU MING, MU LIJUN, BU JUN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a fracturing method for improving formation pressure. The fracturing method sequentially comprises an energizing fracturing fluid stage, a prepad fluid stage, a sand-carrying fluid stage and a displacement fluid stage; in the energizing fracturing fluid stage, energizing fracturing fluid is injected into an oil well, and after injection is completed, the well is closed for diffusion; in the prepad fluid stage, after well shut-in diffusion in the energizing fracturing fluid stage is completed, prepad fluid is injected into the oil well; in the sand-carrying fluid stage, the prepared sand-carrying fluid is injected into the oil well through a fracturing truck; and in the displacement fluid stage, after injection of the sand-carrying fluid is completed, displacement fluid is injected, the well is closed after injection of the displacement fluid is completed, and fracturing is completed; The energizing fracturing fluid fully enters the formation, so that the purpose of increasing the press