Kefeng Yang
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Kefeng Yang has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Jiayuan He
Sinopec Petroleum Exploration and Production Research Institute, Beijing 102206, China
1 shared publication - Jingnan Ge
PetroChina Zhejiang Oilfield Company, Hangzhou 311100, China
1 shared publication - Lei Wang
School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
1 shared publication - Ting Sun
College of Safety and Ocean Engineering, China University of Petroleum-Beijing, Beijing 102249, China
1 shared publication - Xinliang Wang
College of Safety and Ocean Engineering, China University of Petroleum, Beijing 100083, China
1 shared publication - Yanxin Zhao
School of Petroleum Engineering, Yangtze University, Wuhan 434000, China
1 shared publication
Latest Publications
- Open Access
Impact of Formation Dip Angle and Wellbore Azimuth on Fracture Propagation for Shale Reservoir
The significant vertical heterogeneity, variations in ground stress directions, and irregular bedding interfaces make it extremely challenging to predict fracture propagation in continental shale reservoirs. In this article, we conducted a series of triaxial laboratory experiments on continental shale outcrop rocks to investigate the effects of formation dip angle and wellbore orientation on crack propagation under horizontal well conditions. Our study revealed that fracture propagation features can be categorized into four distinct types: (1) hydraulic fractures pass through the bedding interface without activating it; (2) fractures pass through and activate the bedding interface; (3) hydraulic fractures open and penetrate the bedding interface while also generating secondary fractures; and (4) hydraulic fractures open but do not penetrate the bedding interface. We found that as the dip angle decreases, the likelihood of fractures penetrating through the bedding interface increases. Conversely, as the dip angle increases, fractures are more likely to simply open the interface without penetrating it. Moreover, we observed that the well azimuth significantly affects the degree of fracture distortion. Specifically, higher azimuth angles corresponded to a higher degree of fracture distortion.
Open AccessImpact of Formation Dip Angle and Wellbore Azimuth on Fracture Propagation for Shale Reservoir
The significant vertical heterogeneity, variations in ground stress directions, and irregular bedding interfaces make it extremely challenging to predict fracture propagation in continental shale reservoirs. In this article, we conducted a series of triaxial laboratory experiments on continental shale outcrop rocks to investigate the effects of formation dip angle and wellbore orientation on crack propagation under horizontal well conditions. Our study revealed that fracture propagation features can be categorized into four distinct types: (1) hydraulic fractures pass through the bedding interface without activating it; (2) fractures pass through and activate the bedding interface; (3) hydraulic fractures open and penetrate the bedding interface while also generating secondary fractures; and (4) hydraulic fractures open but do not penetrate the bedding interface. We found that as the dip angle decreases, the likelihood of fractures penetrating through the bedding interface increases. Conversely, as the dip angle increases, fractures are more likely to simply open the interface without penetrating it. Moreover, we observed that the well azimuth significantly affects the degree of fracture distortion. Specifically, higher azimuth angles corresponded to a higher degree of fracture distortion.