Resolving InSitu Stress Regime, Hydraulic Fracture Geometry and Complexity by Comparing Acoustic Well Logging Data Acquired in Horizontal and Vertical Wells in the Montney Formation

2014 ◽  
Author(s):  
Yong Qiao ◽  
Salman Khalid ◽  
Ken Faurschou ◽  
Kim Knox
Keyword(s):  
Hydraulic Fracture ◽  
Well Logging ◽  
Vertical Wells ◽  
Stress Regime ◽  
Fracture Geometry ◽  
Horizontal And Vertical Wells ◽  
Montney Formation ◽  
Acoustic Well Logging

Proppant and Fracture Height Measurement from Forgotten Vertical Well Diagnostics

2021 ◽  
Author(s):  
Christopher Lawrence Squires
Keyword(s):  
Hydraulic Fracture ◽  
Height Growth ◽  
Vertical Wells ◽  
Gas Reservoirs ◽  
Height Measurement ◽  
Fracture Geometry ◽  
Role Changes ◽  
Fluid Systems ◽  
Fracture Height ◽  
The Many

Abstract This paper reviews the diagnostic data from vertical wells where operators targeted Burkett, Hamilton and Marcellus Shales and other deeper unconventional shale or tight gas reservoirs with vertical wells between the years 2006-2013. The learnings are then translated for their applicability in horizontal development wells. Its purpose is to deliver a better perception of fracture geometry and interactions between payzones that are separated by potential fracture barriers. Multiple vertical wells employed the use of diagnostics in the form of proppant tracer, production logging and post-fracture temperature surveys to provide an improved understanding of hydraulic fracture and propped fracture height and the formations that serve as hydraulic fracture barriers. Completions variables such as treating rates, proppant volumes, perforation designs and frac fluid systems are examined to determine how they relate to propped fracture height growth. In the majority of the logs reviewed, the proppant was contained to the perforated interval or just above and below. Some wells did have extensive proppant height growth. However, in most of those cases, the propped fracture height was the result of poor cement bonding, multiple fractured intervals growing towards one another and frac plug failures. As expected, hydraulic fracture height is typically significantly higher than the proppant height. Few vertical wells showed evidence of proppant connecting the Marcellus and Burkett zones. Formations acting as fracture barriers did not respond to many of the completions variables. Large treatment volumes, up to 500,000 lbs or more of proppant in a single stage, are often contained to propped fracture heights of less than 50 ft. Few vertical unconventional wells are currently drilled now that most economic Marcellus fairways are well into their development phase. Vertical wells and their learnings are often forgotten with the many personnel and role changes, acquisitions, mergers and other fast paced changes in the industry over the last decade. The purpose of this paper is to reintroduce the valuable and still relevant vital information from these forgotten vertical wells.

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

Effect of Scaling Parameters on Waterflood Performance with Horizontal and Vertical Wells

2008 ◽  
Vol 22 (1) ◽  
pp. 402-409 ◽  
Author(s):  
Nanji J. Hadia ◽  
Lalit S. Chaudhari ◽  
Sushanta K. Mitra ◽  
Madhu Vinjamur ◽  
Raghuvir Singh
Keyword(s):  
Vertical Wells ◽  
Scaling Parameters ◽  
Horizontal And Vertical Wells

Characteristics of Dimensionless Pressure Gradients and Derivatives of Horizontal and Vertical Wells Completed within Inclined Sealing Faults

2021 ◽  
Author(s):  
A V Ogbamikhumi ◽  
E S Adewole
Keyword(s):  
Pressure Drop ◽  
Horizontal Well ◽  
Superposition Principle ◽  
Early Time ◽  
Pressure Gradients ◽  
Vertical Wells ◽  
Pressure Derivative ◽  
Vertical Well ◽  
Dimensionless Pressure ◽  
Horizontal And Vertical Wells

Abstract Dimensionless pressure gradients and dimensionless pressure derivatives characteristics are studied for horizontal and vertical wells completed within a pair of no-flow boundaries inclined at a general angle ‘θ’. Infinite-acting flow solution of each well is utilized. Image distances as a result of the inclinations are considered. The superposition principle is further utilized to calculate total pressure drop due to flow from both object and image wells. Characteristic dimensionless flow pressure gradients and pressure derivatives for the wells are finally determined. The number of images formed due to the inclination and dimensionless well design affect the dimensionless pressure gradients and their derivatives. For n images, shortly after very early time for each inclination, dimensionless pressure gradients of 1.151(N+1)/LD for the horizontal well and 1.151(N+1) for vertical well are observed. Dimensionless pressure derivative of (N+1)/2LD are observed for central and off-centered horizontal well locations, and (N+1)/2 for vertical well are observed. Central well locations do not affect horizontal well productivity for all the inclinations. The magnitudes of dimensionless pressure drop and dimensionless pressure derivatives are maximum at the farthest image distances, and are unaffected by well stand-off for the horizontal well.

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