... dfit geological subdiscipline longitudinal fracture fiber tortuosity signature pressure transient analysis transverse fracture perforation recharge pipe reservoir characterization injection observation injector closure fracturing technology conference relaxation cement paper...

... of the Sanford Underground Research Facility (SURF) in South Dakota, USA ( Kneafsey et al., (2019 ), (2020); Guglielmi et al. (2021 ); Guglielmi et al. (2022 )). E1-I 164 Interval Abstract Although closure detection has a crucial role in hydraulic fracturing operations, significant debate surrounds...

... data quality reservoir geomechanics machine learning artificial intelligence reservoir characterization hydraulic fracturing natural fracture g-function analysis upstream oil & gas heat exchange soliman correction fracture closure pressure dfit geothermal reservoir drillstem...

... Modeling & Simulation drillstem/well testing diagnostic plot Reservoir Characterization Drillstem Testing linear flow time function simulator flow regime hydraulic fracturing flow time function natural fracture closure closure pressure fracture pseudoradial flow regime...

... to DFIT falloff pressure data to determine fracture closure pressure and time, to ultimately improve the overall efficiency of hydraulic fracturing designs. In this study, DFIT pressure is treated as a non-stationary signal and analyzed by one of the signal processing techniques which is wavelet...

... ( Figure 1 ) that incorporates the in-situ stress regime, rock fabric, and pore pressure and that allows history matching of DFIT leak-off and closure behavior for fractures above OB pressure. Simple calculations are provided to estimate the volume and dimensions of these same components for a small volume...

... conduct a multivariate analysis to develop empirical correlations of completions-design parameters with initial fracture volume and fracture characteristic-closure rate (FCR). The results show that harmonic-decline model could be used to estimate initial fracture volume with an average absolute...

... A fully coupled 3D hydraulic/natural fracture simulator is used in this study to investigate fracture injection tests and closure stress estimation in the presence of natural fractures. This section describes the constitutive equations that are used to construct this model and the numerical...

... The fall-off pressure data after shut-in is divided into two regions, namely; before closure pressure and after closure pressure. Thus determining the correct closure pressure is crucial to separate the two regions. With the assumptions of negligible spurt loss, power law fracture growth...

... The leakoff model used herein is based on the work of Sarvaramini and Garagash (2015) : Abstract The goal of this study is to explain the full spectrum of flow patterns observed before and after closure during diagnostic fracture injection tests (DFITs) by considering the dynamic nature...

... and the net closure stress for fractured rocks, based on the work of Barton et al. (1985 ): (3) σ c = σ r e f 9 ( w 0 w f − 1 )   f o r   w f ≤ w 0 where w f is the fracture aperture and, w 0 is the contact width, which represents...

... shadowing accelerates fracture closure and also reduces the intensity of front shadowing. Existing analyses of stress shadowing consider only front shadowing and are generally based on numerical techniques with assumed fracture growth models, and varying approximations of the closing/closed fracture width...

... it only applied to a single normal closure, the original Mayerhofer method was very limited. Further, the method depends on independent estimation of the formation pore pressure. Today commercial software attempts to match a closure iterating on an adaptation of the original Mayerhofer model using pore...

... in unpropped and natural fractures is critical in many geophysical processes and engineering applications. The flow conductivity in these fractures depends on their closure under stress, which is a complicated mechanical process that is chanllenging to model. The chanllenges come from the deformation...

... relations that enable the model to describe fracture closure against proppant (at either low or high concentration) after the end of injection. We also develop a framework for modeling proppant settling in a pseudo-3D model. The method ensures a continuous solution, which guarantees convergence and accuracy...

... math, these authors have, in some cases, ignored the physical processes that drive the observed pressure behavior. This paper seeks to explain the mechanical and physical processes that can occur during the fracture extension and closure process of a DFIT, with a minimum of equations or abstract...

... the ranges of the fracture closure stresses during the leak-off. Multiple down-hole memory gauges were utilized to ensure elimination of wellbore effects on treatment pressure. KCl-laden incompressible water-based fluid system enhanced with friction reducer was utilized in all three stages to ensure minimal...

... use of mini-frac analysis for the determination of fracture closure and after-closure reservoir properties, however, still presents several challenges. Abstract The Montney formation In NE British Columbia and NW Alberta is one of the largest economically feasible resource plays in North America...

.... Since it is difficult to inject fluid into or withdraw fluid from the pore network of tight rock, diagnostic fracture injection tests (DFIT) have been employed to create an analyzable pressure decline response, as well as to derive the minimum horizontal stress via fracture closure identification...

... and gross value. These results clearly demonstrate that economic expediency can be detrimental to a well’s ultimate value and hydrocarbon recovery. proppant transverse fracture closure crafton fracturing materials upstream oil & gas relative permeability saturation hydraulic fracturing...