Large-scale volume fracturing method for horizontal well in deep stratum

• Main Authors: HUANG SHAOQING, ZHANG ZHENGGUANG, GUO HONGYU, XU QIANG, WANG ZHENG, BAI XIUJIA, REN SHAN, MIAO QUANYUN
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• 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

The large-scale volume fracturing method for the horizontal well in the deep stratum comprises the following steps that S1, a vertical shaft is drilled downwards from the ground, the bottom end of the vertical shaft reaches the deep stratum, and the vertical shaft is subjected to first-time well cementation; s2, a transverse horizontal well is drilled from the bottom end of the vertical shaft, the horizontal well is located in the deep stratum, and the horizontal well is subjected to second-time well cementation; s3, preparing slick water fracturing fluids with different viscosities and propping agents with variable particle sizes; s4, the end, away from the vertical shaft, of the horizontal well serves as the tail end, the end, close to the vertical shaft, of the horizontal well serves as the starting end, and the horizontal well is subjected to segmented perforation through a perforating gun in the direction from the tail end to the starting end; after perforation of each well section is completed, fracturi