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Keywords: skin factor
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Proceedings Papers

Paper presented at the SPE Oklahoma City Oil and Gas Symposium, April 17–19, 2023
Paper Number: SPE-213093-MS
... the produced water usually contains impurities such as solids, oil and grease, and bacteria, the well's injectivity deteriorates over time as the skin factor develops. Injecting over the formation parting pressure (FPP) gradient may lead to a matrix bypass event and other geohazards; accurately determining...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 1–5, 2015
Paper Number: SPE-173626-MS
... of acid with metals. Skin factor computations as a function of distance penetrated by acid from well bore will also be discussed in this paper. complex reservoir acidizing Upstream Oil & Gas Fluid Dynamics corrosion inhibitor APC pressurized condition bottomhole temperature Exhibition...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 1–5, 2015
Paper Number: SPE-173607-MS
... to investigate the effects of chemical diversion, acid injection rate and volume on the performance of the treatment. The results of acid distribution, wormhole length and skin factor for each treatment interval as functions of time are analyzed. The evolution profiles of wellbore hydraulics during the acidizing...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 27–29, 2011
Paper Number: SPE-139913-MS
... property, given by equation 2 , was calculated. Despite their results were not based on rigorous formulation of energy dissipation in porous media, and in addition, energy losses were not considered from wellbore to wellhead (even without accounting for skin factor), those results served to identify...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 27–29, 2011
Paper Number: SPE-142177-MS
... is not affected by the presence of isolators. drillstem/well testing pressure behavior lzd 3 horizontal well drillstem testing lzd 2 lzd 0 flow regime approximation zonal isolation skin factor upstream oil & gas perforation zone double perforation zone early radial type curve reservoir...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, April 4–8, 2009
Paper Number: SPE-120106-MS
... are illustrated by numerical examples. It is concluded that, for a given multiple wells system in a circular cylinder reservoir, well pattern, well spacing, skin factor, flow rates and well off-center distances have significant effects on single well pressure transient behaviour. Because the reservoir is under...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, April 4–8, 2009
Paper Number: SPE-120332-MS
... well skin was achieved after performing these acid jobs. Drillstem Testing contribution gravel pack total darcy skin completion process Upstream Oil & Gas relative permeability skin factor wellbore Completion Fluid total skin radial grid single-well model radial grid model Darcy...
Proceedings Papers

Paper presented at the Production and Operations Symposium, March 31–April 3, 2007
Paper Number: SPE-105928-MS
... ¯ h z s E l l (7) Δ P = m E l l t 0.36 + b E l l Eq. 7 suggests that a cartesian plot of ∆ P vs. t 0.36 gives a linear trend which slope and intercept allow for the estimation of horizontal permeability and elliptical skin factor...
Proceedings Papers

Paper presented at the Production and Operations Symposium, March 31–April 3, 2007
Paper Number: SPE-106728-MS
... Productivity Tests are a new approach to obtain key information of the well-reservoir systems. They are based on the analysis of the conventional Deliverability Tests but with the final objective of determining properties like skin factor (s) average pressure ( p ) or relative permeability (k...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, April 16–19, 2005
Paper Number: SPE-94245-MS
... anisotropy, and the degree of formation damage control CFE. The same degree of formation damage yields different CFE in different post-perforation flow geometries. Finally we introduce a method to convert the CFE data to an equivalent skin factor for the perforated wells. skin factor flow test...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 23–25, 2003
Paper Number: SPE-80911-MS
... derivative behavior exp straight line semi-log plot composite reservoir composite system skin factor pressure behavior fault skin boundary leaky boundary source region drillstem/well testing log-log plot dimensionless time reservoir university discontinuity fractured reservoir semi-log...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 24–27, 2001
Paper Number: SPE-67241-MS
... Abstract A new technique has been developed for analyzing the constant bottomhole pressure (BHP) test data. The method presented in this note allows to calculate the skin factor for damaged and stimulated oil wells. Advantages of the BHP test are: (1) they do not require that well be shut...
Proceedings Papers

Paper presented at the SPE Production and Operations Symposium, March 24–27, 2001
Paper Number: SPE-67234-MS
... for nonequilibrium flow conditions is less compared to equilibrium flow conditions. Charts are developed and presented for the productivity index and skin factor in terms of relevant dimensionless parameters. In addition, the formulae for estimation of the radius of the plugging region (skin radius...
Proceedings Papers

Paper presented at the SPE Mid-Continent Operations Symposium, March 28–31, 1999
Paper Number: SPE-52166-MS
... the skin estimate obtained during the treatment. We studied the effectiveness of seventeen matrix acidizing treatments in Gulf of Mexico sandstone reservoirs by evaluating the skin factor evolution during the treatments from the rate/pressure responses and by examining production performances after...
Proceedings Papers

Paper presented at the SPE Mid-Continent Operations Symposium, March 28–31, 1999
Paper Number: SPE-52201-MS
... flow regimes; bilinear flow, linear flow, infinite-acting radial flow, and pseudo-steady state flow. The slopes and points of intersection of these straight lines are unique and therefore can be used to calculate several well, reservoir and fracture parameters: permeability, skin factor, wellbore...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, March 9–11, 1997
Paper Number: SPE-37460-MS
... program calculated the bottomhole pressure and estimated the skin factor as the treatments progressed. In this way, the responses of the wells to stimulation were evaluated. Real-time monitoring of the evolving skin factor showed when further acid injection resulted in no further stimulation, leading...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, March 9–11, 1997
Paper Number: SPE-37461-MS
... depositions. The over-balanced drilling practices, combined with poor quality mud and overbalanced perforating with mud in the well, resulted in near wellbore damage. This indicated high skins should be expected. Therefore, production data was evaluated for a positive skin. The skin factor, k*h product...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, April 2–4, 1995
Paper Number: SPE-29497-MS
... Given the following well and reservoir data, determine the mechanical skin factor, S, pressure drop due to mechanical skin factor, ΔP s , flow efficiency, F.E., horizontal well shape factor, C H , and horizontal well productivity index, J H . X fl = 400 ft r w = 0.375 ft h = 32 ft ϕ=14...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, April 2–4, 1995
Paper Number: SPE-29526-MS
.... This circulation time is determined for the various anisotropy ratios and penetration rates. permeability damage region flow in porous media horizontal length drilling fluid property damage radius variation equation penetration rate skin factor mud filtrate invasion drillstem testing filtration...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, March 21–23, 1993
Paper Number: SPE-25461-MS
..., and by restimulating wells identified through pressure transient testing as problem wells. A gas production increase of 109% was achieved in one well after it was converted from reverse gas-lift to a mechanical pump. A second well, identified through pressure transient testing to have a dimensionless skin factor...

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