Crack initiation method, device and system and controller

The invention discloses a crack initiation method, device and system and a controller, and relates to the technical field of hydraulic fracturing, wherein the method comprises the steps that the inherent frequency of one order of a liquid column filled into the position from a crack opening to a cra...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PENG YAN, CHEN ZHANGXING, QUAN ZIHAN, HOU YANAN, LIU YISHAN, ZHANG WENPING, ZHANG KE, TIAN YINGYING
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a crack initiation method, device and system and a controller, and relates to the technical field of hydraulic fracturing, wherein the method comprises the steps that the inherent frequency of one order of a liquid column filled into the position from a crack opening to a crack tip of a target crack is obtained, wherein the crack opening is a crack initiation point of the target crack, and the crack tip is a position far away from the crack opening in the extending direction of the target crack; and when the crack tip of the target crack is blocked and the crack opening is blocked in a crack intersecting with the target crack or a shaft intersecting with the target crack, a pulse pump is controlled to apply pulse pressure to the crack opening of the target crack, so that at least one point in the extending direction of the target crack is subjected to crack initiation, wherein the frequency of the pulse pressure is the inherent frequency of one order of the liquid column. According to