Black shale multi-scale hydraulic fracture fine scanning and quantitative characterization method

• Main Authors: CHANG XIN, WAN YANGHUI, LYU JIANGYAN, JIANG MAN, ZHANG SHIHANG, HU YI, LI QIANG, JIANG CHENGBAI, DOU RUIJIE
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS; TESTING

The invention discloses a black shale multi-scale hydraulic fracture fine scanning and quantitative characterization method, which is applied to the field of unconventional shale oil and gas development and aims to solve the problem that fracture complexity is difficult to quantitatively describe in the prior art. The identification sheet is pasted on the crack surface, so that the problems that black shale is difficult to scan through laser scanning and fine features of the crack surface after pressing are captured are solved; a shale sample with a relatively large size can be scanned; the three-dimensional shape and the crack surface roughness of the fractured crack can be truly displayed; three quantitative characterization mathematical models for calculating the fracture roughness, namely volume density, bedding fracture and main fracture area ratio and fracture surface point cloud elevation mean square error, are provided; by adopting the method provided by the invention, the scanning accuracy of the cra