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Showing 1 to 8 of 8 for “"DFIT"”.
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A novel diagnostic fracture injection test workflow considering natural fractures
… of diagnostic fracture injection test (DFIT) are used in unconventional reservoirs to determine reservoir characteristics for future fracture design and production. DFIT consists of creating a minifrac by pumping small amounts of water and monitoring the pressure response. The presence …
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Evaluation of diagnostic fracture injection test (DFIT) and rate transient analysis (RTA) in Hereford field, northern DJ Basin
… data from diagnostic fracture injection test (DFIT). Then, I use the PKN model to several individual hydraulic fracture stages and interpreted the falloff data from such tests to obtain effective fracture permeability of the stimulated reservoir volumes. Finally, I evaluate the production data …
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Differential Item Functioning on the International Personality Item Pool's Neuroticism Scale
… level by gender and three age ranges using the DFIT framework (Raju, van der Linden, & Fleer, 1993) This study found six items that displayed differential item functioning by gender and three items that displayed differential item functioning by age. No differential functioning at the test level …
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Assessing the Differential Functioning of Items and Tests of a Polytomous Employee Attitude Survey
… differential functioning of items and tests (DFIT) framework. Comparisons were made between managers and non-managers on the 'Management' dimension and between medical staff and nurse staff employees on both the 'Management' and 'Quality of Care and Service' dimensions. 2 out of 21 items from …
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Automated Estimation of ISIP and Friction Losses in Hydraulic Fracture Treatment Falloff Data
… of the diagnostic fracture injection test (DFIT) data. Furthermore, this study eliminates human bias and the subjectivity that accompanies the manual selection of shut-in pressure and ISIP. Finally, this study opens the door for performing spatial and statistical analysis for field data from …
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New Models and Analysis Techniques for Diagnostic Fracture Injection Tests
… Traditional fracture injection/shut-in tests (DFIT’s) play a critical role in this assessment; however, their applicability is limited in ultra-tight formations due to prolonged test durations. To overcome this challenge, pump-in/flowback tests have been employed to expedite the testing …
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3D modeling and characterization of hydraulic fracture efficiency integrated with 4D/9C time-lapse seismic interpretations in the Niobrara Formation, Wattenberg field, Denver Basin
… and calibrated to field diagnostic measurements (DFIT) and observations (microseismic and 4D/9C multicomponent time-lapse seismic). By incorporating the geological heterogeneity into the 3D hydraulic fracture simulation, a more representative response is generated that demonstrate the variability …