Fracturing-Fluid Leakoff Under Dynamic Conditions Part 1: Development of a Realistic Laboratory Testing Procedure

McGowen, J.M.; Vitthal, S.

doi:10.2523/36492-ms

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1999

2024

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“…For one of the latest reviews see McGowen and Vitthal. 1 During fracturing, the actual leakoff is determined by a coupled system, of which the filter cake is only one element. The other two important elements are the region invaded by the polymer and/or filtrate and the bulk reservoir itself, containing the original ͑slightly compressible͒ reservoir fluid.…”

Section: Introductionmentioning

confidence: 99%

Fluid-Leakoff Delineation in High-Permeability Fracturing

Valkó

Economides

1999

SPE Production &Amp; Facilities

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Starting from the original concept proposed by Carter, Howard and Fast, this paper reviews the description of fracturing fluid leakoff in view of modeling flow in porous media. It is shown how various linear leakoff models have been developed and why a new, radial leakoff concept is necessary for high-permeability fracturing, where the injection time is commensurable to the response time of the reservoir. Using Laplace space methods, the new radial leakoff law is calculated and compared to linear leakoff. For comparison purposes a calibration test executed in high-permeability formation is interpreted using several approaches, namely: linear leakoffϩbulk leakoff coefficient; filtercake resistanceϩlinear flow in the formation and finally, filtercake resistanceϩradial flow in the formation.

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Section: Introductionmentioning

confidence: 99%