Permeability Variations in Sandstones and Their Relationship to Sedimentary Structures

Hurst, Andrew; Rosvoll, Kjell Johan

doi:10.1016/b978-0-12-434066-4.50011-4

Cited by 63 publications

(28 citation statements)

References 11 publications

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“…Likewise, small-scale permeability heterogeneity plays a substantial role in petroleum migration and reservoir performance, because permeability may vary over many orders of magnitude (e.g., 0.01 mD to over 10,000 mD [Norris and Lewis, 1991]). Permeability heterogeneities on the meter-to-micrometer scale, such as beds, laminae, internal sedimentary structures and variations in pore morphology, are the source of most retrieval difficulties during enhanced oil recovery operations, thus negatively affecting reservoir recovery efficiency [Weber, 1982[Weber, , 1986Hurst and Rosvoll, 1991;Ali, 1993;Pickup et al, 1995].…”

Section: Introductionmentioning

confidence: 99%

“…Except for relatively homogeneous formations, this scale of permeability measurement is in an ill-defined geologic region, falling within the range of laminae and lamina sets [Allen, 1988;Hurst and Rosvoll, 1991;Jensen et al, 1994;. Furthermore, core plug samples tend to be biased toward the more consolidated, less permeable and less friable sections [Robertson and McPhee, 1990;Hurst, 1993;Zheng et al, 2000].…”

Section: Introductionmentioning

confidence: 99%

“…As an example, the effect of this arbitrary sampling density on Hassler-sleeve measurements for the case of tight gas sands is that magnitudes of permeability less than 100 mD frequently result, even when coarser-grained beds that would operate as preferential flow channels or ''thief zones'' are clearly present. Currently, the scale of sedimentary heterogeneity is best resolved by use of the minipermeameter, which allows investigation of permeability heterogeneity at much greater (and statistically significant) sampling densities and on much smaller scales than is possible with the traditional technique [Jensen, 1990;Robertson and McPhee, 1990;Hurst and Rosvoll, 1991;Corbett and Jensen, 1992a;Bourke, 1993;Halvorsen, 1993;Kara et al, 1993;Hurst and Goggin, 1995;Tidwell and Wilson, 1997].…”

Section: Introductionmentioning

confidence: 99%

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A new small drill hole minipermeameter probe for in situ permeability measurement: Fluid mechanics and geometrical factors

Dinwiddie

Molz

Castle

2003

Water Resources Research

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[1] Considerable heterogeneity is evident when permeability measurements are made on small scales, either in the field or in the laboratory on field samples. Small-scale permeability measurements have commonly been made by inducing multidimensional gas flow through a sample with various configurations of the conventional surface-sealing gas minipermeameter. In order to reduce weathering and seal-quality problems, a new minipermeameter probe was designed for field application within small diameter holes drilled into an outcrop. We briefly describe the small drill hole minipermeameter, while developing in detail the associated data analysis methodology for performing in situ permeability measurements with this new probe. Analysis of field data, which consists of gas injection pressure and mass flow rate, is based on a numerical solution in cylindrical coordinates of the ideal gas flow equation, assuming homogeneous and isotropic conditions over the averaging volume of the measurements. In the following development the semianalytical inverse solution for permeability will be derived for the new small drill hole minipermeameter probe, which varies from that of the conventional surfacesealing minipermeameter probe only in the choice of the appropriate characteristic length and in the magnitude of the associated geometrical factor.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new small drill hole minipermeameter probe for in situ permeability measurement: Fluid mechanics and geometrical factors

Dinwiddie

Molz

Castle

2003

Water Resources Research

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“…Although there have been numerous studies of the distribution of hydraulic conductivity at the sites of field tracer tests [Sudicky, 1986;Killey and [Greenkorn et al, 1964;Polasek and Hutchinson, 1967;Stalkup, 1986;Hurst and Rosvoll, 1991]. Directional anisotropy was considered in two of these studies.…”

Section: Introductionmentioning

confidence: 99%

“…Their results indicated that the value of vertical permeability averaged 70% of the average minor-axis horizontal permeability. Hurst and Rosvoll [1991] also used a laboratory air permeameter to evaluate permeabilities in the plane of the bedding. They made measurements in orthogonal orientations and found ratios ranging from 1.1 to 2.5 but did not attempt to resolve the principal components of the K tensor.…”

Section: Introductionmentioning

confidence: 99%

Measurement of anisotropic hydraulic conductivity in unconsolidated sands: A case study from a shoreface deposit, Oyster, Virginia

Burger¹,

Belitz²

1997

Water Resources Research

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Abstract. In this study an integrated field and laboratory method which can be used to evaluate the magnitude and distribution of anisotropic hydraulic conductivity at the scale of bedding structures in unconsolidated sediment is demonstrated. Undisturbed sediment cores 10.16 cm in diameter and 18.25 cm long are obtained using a split-barrel core sampler. Two undisturbed 5.72 cm diameter (7.90 cm long) subcores, oriented parallel and perpendicular to the primary bedding structures, are then obtained from each field core; the hydraulic conductivities of the subcores are then measured with a constant-head permeameter. The sampling and experimental procedures are designed to minimize potential sources of error. Sixty-four 10.16 cm cores were sampled in a coastal sand outcrop located -300 rn from a subsurface injection experiment near Oyster, Virginia. Four distinct lithologies were sampled in horizontal transects with a spacing of 0.5 rn between core locations. In addition, iron oxide bands which were prevalent throughout the exposure were sampled from both ends of the outcrop. The average hydraulic conductivity values are consistent with the observable geologic features (grain size, sorting, and iron oxide banding). Hydraulic conductivity is greater in the parallel-oriented subcore for 90% of the core pairs, and mean hydraulic conductivity ratios of parallel to perpendicularoriented subcores (K,/Kñ) for the different lithologies ranged from 1.33 to 1.57. The major control on the anisotropy in this sediment is interpreted to be preferential grain orientations resulting from depositional processes, with additional influences from the prominence of the bedding structures and secondary features such as hydrous iron oxide banding.

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The Property Model

Ringrose

Bentley

2021

Reservoir Model Design

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Permeability Variations in Sandstones and Their Relationship to Sedimentary Structures

Cited by 63 publications

References 11 publications

A new small drill hole minipermeameter probe for in situ permeability measurement: Fluid mechanics and geometrical factors

A new small drill hole minipermeameter probe for in situ permeability measurement: Fluid mechanics and geometrical factors

Measurement of anisotropic hydraulic conductivity in unconsolidated sands: A case study from a shoreface deposit, Oyster, Virginia

The Property Model

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