scholarly journals Research on Fracture Initiation Pressure in Deviated Well of WCH9 Block

2021 ◽  
Vol 9 (2) ◽  
pp. 41
Author(s):  
Siyu Xie ◽  
Yongquan Hu ◽  
Xiaojin Wan ◽  
Shaowei Wu ◽  
Liming Cheng ◽  
...  
Keyword(s):  
Fracture Initiation ◽  
Initiation Pressure

scholarly journals Fracture Initiation Model of Shale Fracturing Based on Effective Stress Theory of Porous Media

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Yuwei Li ◽  
Dan Jia
Keyword(s):  
Porous Media ◽  
Mechanical Characteristics ◽  
Oil And Gas ◽  
Elastic Anisotropy ◽  
Special Kind ◽  
Fracture Initiation ◽  
Propagation Mechanism ◽  
Stress Theory ◽  
Unconventional Oil And Gas ◽  
Initiation Pressure

Unconventional oil and gas are important resources of future energy supply, and shale gas is the focus of the development of unconventional resources. Shale is a special kind rock of porous medium, and an orderly structure of beddings aligned in the horizontal direction where causing the strong elastic anisotropy of shale is easy. A new model has been established to calculate the fracture initiation pressure with the consideration of mechanical characteristics of shale and the anisotropic tensile strength when judging rock failure. The fracture initiation model established in this paper accurately reflects the stress anisotropy and matches well with the actual situation in porous media. Through the sensitivity analysis, the results show that σv/σH, Ev/EH, υv/υH, m/s, and A/B have a certain impact on the tangential stress when the circumferential angle changes, and there is a positive relationship between the initiation pressure and the above sensitive factors except for A/B. The results can provide a valuable and effective guidance for the prediction of fracture initiation pressure and fracture propagation mechanism under special stratum conditions of shale.

Effects of Perforation Pollution Zone on Fracture Initiation

2011 ◽  
Vol 255-260 ◽  
pp. 2761-2765
Author(s):  
Su Ling Wang ◽  
Qing Bin Li ◽  
Zhen Xu Sun ◽  
Zheng Wei Tian
Keyword(s):  
Mechanical Model ◽  
Transient Analysis ◽  
Fracture Initiation ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Fracture Pressure ◽  
Key Factor ◽  
Initiation Pressure ◽  
Fluid Coupling ◽  
Solid Fluid Coupling

Fracture initiation is a key factor of hydraulic fracturing, as lack of research on fracture initiation position.The perforation geostress mechanical model of low permeability reservoir is built according to the rock mechanics, seepage mechanics, elastic-plastic mechanics, considering solid-fluid coupling and rock material nonlinearity. Adopting the transient analysis, low-permeability reservoir geostress distribution of different stages is obtained using the finite element, such as drilling - cementing - perforation –fracturing. Determine the fracture initiation position and fracture pressure combining with the rock failure criterion. Calculated on well Ao332-32, the error rate of initiation pressure between test and calculation is 3.5 percent. It is proved that the model is reasonable.

A study of influencing factors on fracture initiation pressure of cemented sliding sleeve fracturing

2014 ◽  
Vol 18 ◽  
pp. 219-226 ◽  
Author(s):  
Huanqiang Yang ◽  
Ruihe Wang ◽  
Weidong Zhou ◽  
Luopeng Li ◽  
Fei Chen
Keyword(s):  
Influencing Factors ◽  
Fracture Initiation ◽  
Initiation Pressure

Fracture-initiation pressure prediction for transversely isotropic formations

2019 ◽  
Vol 176 ◽  
pp. 821-835 ◽  
Author(s):  
Tianshou Ma ◽  
Yang Liu ◽  
Ping Chen ◽  
Bisheng Wu ◽  
Jianhong Fu ◽  
...  
Keyword(s):  
Transversely Isotropic ◽  
Fracture Initiation ◽  
Initiation Pressure

Prediction of Fracture Initiation Pressure and Fracture Geometries in Elastic Isotropic and Anisotropic Formations

2016 ◽  
Vol 50 (3) ◽  
pp. 705-717 ◽  
Author(s):  
H. Li ◽  
Y. S. Zou ◽  
S. Liu ◽  
G. Q. Liu ◽  
Y. Z. Jing ◽  
...  
Keyword(s):  
Fracture Initiation ◽  
Initiation Pressure
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