Well-ground combined long horizontal section dense fracturing gas rapid extraction method by replacing roadway with well

• Main Authors: ZHANG JIE, MO HAITAO, WANG CHANGWEI, ZHU WENXIA, CHEN TIANZHU, XU YAOBO
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention discloses a well-ground combined long horizontal section dense fracturing gas rapid extraction method with a well replacing a roadway. The method comprises the steps that the deployment position of a horizontal well is determined; construction parameter design of the horizontal well is completed according to the earlier-stage exploration data, and construction parameters comprise the length of a horizontal section, the position of a horizontal well end hole, the length of a stable inclination section and a stable inclination angle; drilling and completion construction of the horizontal well is completed; an underground long drill hole is constructed in the main roadway open-off cut position in the upward inclination direction of the horizontal section, and butt joint of the underground long drill hole and the horizontal section is completed; fracturing construction of the horizontal section is completed section by section; after flow-back is completed, drilling and washing are conducted on the h