Interaction between slick water and gas shale and its impact on methane desorption: a case study of Longmaxi member shale formation in the northeast of Chongqing, China

Z, Liu; Xie, Yingming; Yang, Huan; Qu, Hai; Li, Yong; Zeng, Shaohua; Ding, Zhongpei

doi:10.1080/10916466.2023.2175859

Cited by 1 publication

(1 citation statement)

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“…As the dip angle becomes larger, it becomes more challenging for the fracture to penetrate through the bedding interface. Jia Changgui, Hou Bing, and colleagues [18][19][20][21][22] conducted a series of true triaxial experiments on wells with high dip angles to study the effects of perforation phase angle, well dip angle, and well azimuth on initiating hydraulic fractures. Their results revealed that the well dip angle primarily influences the degree of fracture distortion, while the perforation phase angle mainly affects the number of hydraulic fractures.…”

Section: Introductionmentioning

confidence: 99%

Impact of Formation Dip Angle and Wellbore Azimuth on Fracture Propagation for Shale Reservoir

Yang

Wang

Ge³

et al. 2023

Processes

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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.

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Section: Introductionmentioning

confidence: 99%