Natural fracture dynamic monitoring method under true triaxial hydraulic fracturing and related equipment

• Main Authors: WANG LEI, WAN YANGHUI, BI ZHENHUI, WANG XINGYI, ZHANG XIN'AO, WU XIAOLONG, ZHAO GUOKAI, MAO HAIJUN, CHANG XIN, ZHENG HEBIN, GUO WUHAO, QIU GUOZHOU, JING YUXIANG, GUO YINTONG
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2023
• 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 invention provides a natural fracture dynamic monitoring method under true triaxial hydraulic fracturing and related equipment. The method comprises the steps that on the basis of a hydraulic pressure test, dynamic parameters of a natural fracture sample under true triaxial hydraulic fracturing are obtained through an optical fiber sensor, and the sample comprises a shaft; and based on the dynamic parameters, crack slippage of the sample and deformation quantity of the shaft are determined. The influence of parameters such as natural fracture types, fracturing fluid displacement and fracture intersection angles on the deformation quantity of the shaft can be studied, so that quantitative evaluation is achieved, and technical support is provided for fracturing horizon optimization and fracturing construction site parameter optimization design. And meanwhile, the method has certain engineering significance for promoting the horizontal shaft damage prevention theory and technology and on-site construction de