So What is the Reservoir Permeability?

Haddad, S.; Cribbs, M.; Sagar, R.; Viro, E.; Castelijins, K.; Tang, Y.

doi:10.2523/63138-ms

Cited by 11 publications

(10 citation statements)

References 2 publications

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“…These permeabilities may vary significantly, resulting in inconsistent estimates of well and/or reservoir performance. This paper is a continuation of work on the Fuji Gulf of Mexico deepwater prospect presented by Haddad et al 15 . We look at two Gulf of Mexico deepwater wells, where permeability is available from multiple sources including NMR, formation tester, well test and core data.…”

Section: Introductionmentioning

confidence: 63%

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Integrating Permeabilities from NMR, Formation Tester, Well Test and Core Data

Haddad¹,

Cribbs²,

Sagar³

et al. 2001

Proceedings of SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractPermeability is a critical reservoir parameter that defines well and reservoir performance. An accurate knowledge of permeability is critical to forecasting rates and designing production facilities. The permeability determined from different sources can vary significantly, resulting in inconsistent estimates of well and/or reservoir performance.In this paper, permeability values and evaluation methods, are discussed and verified with field data. It is shown how NMR derived permeabilities calibrated to MDT or comprehensive core data can be used to define well/reservoir performance. By accounting for the effects of overburden, as well as, pore pressure when measuring permeability in core tests, more representative values of permeability can be determined. These values of permeability can be used to accurately calibrate NMR permeability data.The simulation and calibration results are compared to measured well test data. Results from this work show that if these various sources are integrated properly an accurate well productivity model can be achieved.

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Section: Introductionmentioning

confidence: 63%

“…Available relative permeability curves of oil and water from laboratory test were used with irreducible water saturation of S iw = 0.274, as given in Fig.5 of Ref. 15.…”

Section: Permeability Validation Through Numerical Simulationmentioning

confidence: 99%

Integrating Permeabilities from NMR, Formation Tester, Well Test and Core Data

Haddad¹,

Cribbs²,

Sagar³

et al. 2001

Proceedings of SPE Annual Technical Conference and Exhibition

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“…In other words, the well test analysis provides the global values of the reservoir parameters that are valid over the radius of investigation. 1 Thus, the obtained reservoir information is good for the region within the ROD. In addition, knowing the ROD helps optimize the locations of new wells to be drilled in a field.…”

Section: Introductionmentioning

confidence: 83%

Effects of Criterion Values on Estimation of the Radius of Drainage and Stabilization Time

Hossain¹,

Tamim²,

Rahman³

2002

Canadian International Petroleum Conference

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After a well starts flowing, a larger and larger portion of the reservoir contributes to production. At any given time, the radius of the portion of the reservoir that demonstrates a pressure gradient and contributes to production of fluid is the radius of drainage (ROD). The time required for the entire reservoir just to be able to contribute production is the stabilization time. Estimating the ROD and stabilization time is very important in well test design and production optimization. It has been a great challenge to estimate accurately the ROD and stabilization time because of inherent uncertainties with respect to the rock and fluid properties. This study examines the effects of criterion values on the estimated values of the ROD and stabilization time. As expected, estimated values of the ROD and stabilization time vary considerably, depending on the suggested criteria. The primary objective of this study is to recognize and appreciate the importance of criterion values for defining the ROD and stabilization time.Generalized correlations have been proposed that allow one to determine the ROD and stabilization time as a function of the criterion values. The relationship between a pressure criterion and the corresponding rate criterion has been examined also.

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“…Such an approach has been used before [7][8][9] , but with WFT drawdown permeabilities from Eq. (3), which may be practical but not quantitative for the reasons explained earlier.…”

Section: Data Integrationmentioning

confidence: 99%

A Practical Approach to Determine Permeability from Wireline Measurements

2007

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Permeability is a crucial input to any simulation effort to forecast production. It is available from different sources: core, nuclear magnetic resonance (NMR), wireline formation tester (WFT) and drill stem test (DST). These sources are different in many aspects: the type of permeability they measure, e.g. absolute or effective, the scale of measurement in the vertical and the lateral directions and the degree of inconvenience caused by the data acquisition process in terms of operational constraints, costs, safety issues, etc.Much effort has been invested by the industry to be able to use the most cost effective tools, NMR and WFT, for permeability measurement as substitute for the less convenient ones: core and DST. Results of these efforts are still mostly qualitative.This work is a summary of the senior author's MSc thesis 1 which reviewed the different sources of permeability and their limitations using field data from, an oil bearing, clastic reservoir that included core, NMR, WFT and DST. All these data were analyzed and interpreted for permeability evaluation. The objective of the study was to develop an approach for calibrating the static NMR permeability log with the WFT dynamic data and to compare the results with the traditional approach of calibrating with cores. Permeabilities from both approaches were upscaled for comparing with DSTderived permeabilities.It was found that the upscaled WFT-calibrated NMR permeabilities match the DST permeabilities as satisfactorily as the upscaled core-calibrated NMR permeabilities.

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So What is the Reservoir Permeability?

Cited by 11 publications

References 2 publications

Integrating Permeabilities from NMR, Formation Tester, Well Test and Core Data

Integrating Permeabilities from NMR, Formation Tester, Well Test and Core Data

Effects of Criterion Values on Estimation of the Radius of Drainage and Stabilization Time

A Practical Approach to Determine Permeability from Wireline Measurements

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