Work

Multiscale Fracture Characteristics of Coal and Their Influence on Fracture Propagation

Year: 2026

Type: article

Abstract: The complex natural fracture system in coalbed methane reservoirs plays a critical role in hydraulic fracture propagation. This study investigates coal specimens collected from the subsurface of the Ordos Basin (North China). By integrating CT scanning, X-ray diffraction, nanoindentation, and compression tests, the authors systematically characterized the natural fracture development, mineral composition, and mechanical properties of the coal. Based on these data, a numerical model of coal formation was established using the discrete fracture network (DFN) method to evaluate the influence of natural fracture characteristics on hydraulic fracture propagation. Finally, based on a field fracturing case, recommendations for fracturing treatment design are proposed.

Source: Applied Sciences

DOI: 10.3390/app16073214

Authors: Jie Bai, Haige Wang, Guangcong Ren, Yan Qiao

Institutions: Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation (China)

Language: English

Topic: Hydraulic Fracturing and Reservoir Analysis

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: Ministry of Science and Technology of the People's Republic of China, China National Petroleum Corporation