Examining Hydraulic Fracture Characteristics Based on Induced Microseismicity: A Barnett Shale Case Study

2019 ◽  
Author(s):  
Suzie Jia ◽  
Ron Wong ◽  
David Eaton
Keyword(s):  
Hydraulic Fracture ◽  
Barnett Shale ◽  
Fracture Characteristics

A Semianalytical Modeling Approach for Hydraulic Fracture Initiation and Orientation from Perforated Wells

2021 ◽  
pp. 1-15
Author(s):  
Andreas Michael ◽  
Ipsita Gupta
Keyword(s):  
Tensile Strength ◽  
Closed Form ◽  
Hydraulic Fracture ◽  
Fracture Initiation ◽  
Barnett Shale ◽  
Transverse Fracture ◽  
Breakdown Pressure ◽  
Analytical Approximations ◽  
Wellbore Pressure

Summary Accurate prediction of fracture initiation pressure and orientation is paramount to the design of a hydraulic fracture stimulation treatment and is a major factor in the treatment's eventual success. In this study, closed-form analytical approximations of the fracturing stresses are used to develop orientation criteria for relative-to-the-wellbore (longitudinal or transverse) fracture initiation from perforated wells. These criteria were assessed numerically and found to overestimate the occurrence of transverse fracture initiation, which only takes place under a narrow range of conditions in which the tensile strength of the rock formation is lower than a critical value, and the breakdown pressure falls within a “window.” For a case study performed on the Barnett Shale, transverse fracture initiation is shown to take place for breakdown pressures below 4,762 psi, provided that the formation's tensile strength is below 2,482 psi. A robust 3D finite volume numerical model is used to evaluate solutions for the longitudinal and transverse fracturing stresses for a variable wellbore pressure, hence developing correction factors for the existing closed-form approximations. Geomechanical inputs from the Barnett Shale are considered for a horizontal well aligned parallel to the direction of the least compressive horizontal principal stress. The corrected numerically derived expressions can predict initiation pressures for a specific orientation of fracture initiation. Similarly, at known breakdown pressures, the corrected expressions are used to predict the orientation of fracture initiation. Besides wellbore trajectory, the results depend on the perforation direction. For the Barnett Shale case study, which is under a normal faulting stress regime, the perforations on the side of the borehole yield a wider breakdown pressure window by 71% and higher critical tensile strength by 32.5%, compared to perforations on top of the borehole, implying better promotion of transverse fracture initiation. Leakage of fracturing fluid around the wellbore, between the cemented casing and the surrounding rock, reduces the breakdown pressure window by 11% and the critical tensile strength by 65%. Dimensionless plots are employed to present the range of in-situ stress states in which longitudinal or transverse hydraulic fracture initiation is promoted. This is useful for completion engineers; when targeting low permeability formations such as shale reservoirs, multiple transverse fractures must be induced from the horizontal wells, as opposed to longitudinal fracture initiation, which is desired in higher permeability reservoirs or “frac-and-pack” operations.

Data Analytics to Help Improve Hydraulic Fracture Geometry Prediction Using Support Vector Regression: Case Study

2020 ◽  
Author(s):  
Avinash Wesley ◽  
Bharat Mantha ◽  
Ajay Rajeev ◽  
Aimee Taylor ◽  
Mohit Dholi ◽  
...  
Keyword(s):  
Support Vector Regression ◽  
Hydraulic Fracture ◽  
Data Analytics ◽  
Support Vector ◽  
Fracture Geometry

Contacting More of the Barnett Shale Through an Integration of Real-Time Microseismic Monitoring, Petrophysics, and Hydraulic Fracture Design

2007 ◽  
Author(s):  
John Leonard Daniels ◽  
George A. Waters ◽  
Joel Herve Le Calvez ◽  
Doug Bentley ◽  
John T. Lassek
Keyword(s):  
Real Time ◽  
Hydraulic Fracture ◽  
Microseismic Monitoring ◽  
Barnett Shale

Errata

2020 ◽  
Vol 39 (4) ◽  
pp. 291-291
Keyword(s):  
Hydraulic Fracturing ◽  
Barnett Shale ◽  
Fort Worth ◽  
Normal Faulting ◽  
Fort Worth Basin ◽  
The Third ◽  
Mail Address ◽  
E Mail

The March 2020 TLE article by Alexandrov et al., “Normal faulting activated by hydraulic fracturing: A case study from the Barnett Shale, Fort Worth Basin,” contained an error in the third author's affiliation and e-mail address. Umair bin Waheed's correct affiliation is King Fahd University of Petroleum and Minerals, and the correct e-mail address for the author is [email protected] .

Reducing uncertainty in unconventional reservoir hydraulic fracture modeling: A case study in Saudi Arabia

2019 ◽  
Vol 71 ◽  
pp. 102948 ◽  
Author(s):  
Clay Kurison ◽  
Huseyin Sadi Kuleli ◽  
Ahmed H. Mubarak ◽  
Ali Al-Sultan ◽  
Saad J. Shehri
Keyword(s):  
Saudi Arabia ◽  
Hydraulic Fracture ◽  
Unconventional Reservoir ◽  
Fracture Modeling
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