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Induced stress interaction during multi-stage hydraulic fracturing from horizontal wells using boundary element method
Shi X1; Yang L(杨柳)2; Li ML3; Cheng YF1
Source Publication4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
Conference Name4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
Conference DateMay 10, 2017 - May 13, 2017
Conference PlaceJeju, Korea, Republic of
AbstractMultistage hydraulic fracturing is commonly applied to enhance gas productivity in unconventional reservoirs. Since the multiple fractures are created and propagated simultaneously or in a sequential manner from perforation clusters, the induced stress interference is a predominant reservoir geomechanical consideration in multi-stage hydraulic fracturing design. This paper presents a numerical model for multiple fracture propagation and induced stress analysis in multi-stage horizontal wells. The reservoir rock is assumed linear elastic, homogenous and isotropic. The influences of original stress condition, perforation numbers, wellbore inclination angles and some critical parameters on the feasibility of complex fracture network generation are investigated. The results demonstrate that the stress interference of the simultaneous initiation of fractures in simultaneous perforation manner is greater than conventional sequential perforation manner in one stage, which is beneficial for complex fracture network complexity. Under sequential fracturing manner, the induced stress increases with the increased length of the pressurized fracture. Moreover, the perforation orientations and original horizontal stress difference controls the stress interference simultaneously and then affect complex fracture network generation. In particular, if the horizontal stress difference is great, it’s hard to create complex fracture network under current hydraulic fracturing stimulation technology. © 2017 by Korean Society for Rock Mechanics.
KeywordBoundary element method Complex networks Fracture Hydraulic fracturing Rock mechanics Sailing vessels Stress analysis Fracture network Gas productivity Horizontal stress Inclination angles Multiple fracture Sequential manners Stress condition Unconventional reservoirs
Indexed ByEI
Document Type会议论文
Affiliation1.China University of Petroleum (Huadong), Qingdao, Shandong, China;
2.Institute of Mechanics, Chinese Academy of Sciences, Beijing, China;
3.Chongqing Institute of Geology and Mineral Resources, Chongqing, China
Recommended Citation
GB/T 7714
Shi X,Yang L,Li ML,et al. Induced stress interaction during multi-stage hydraulic fracturing from horizontal wells using boundary element method[C]4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017,2017:354-358.
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