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D40/D90

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Journal Articles
J Pet Technol 63 (10): 20–21.
Paper Number: SPE-1011-0020-JPT
Published: 01 October 2011
... data can be used to challenge these guidelines while still managing risk. For example, the uniformity coefficient (defined as D40/D90) is a measure of the range of grain sizes in a sand, but the D90 is one of the most difficult parameters to measure reliably. Slight variations in the D90 calculated...
Journal Articles
J Pet Technol 68 (10): 74–75.
Paper Number: SPE-1016-0074-JPT
Published: 01 October 2016
... (d50) divided by the uniformity coefficient (d40/d90) and the gravel pack is described by the apparent pore size of the gravel. This approach allows laboratory performance testing for solids production, size of solids, and retained permeability to be compared directly for gravel-pack completions...
Proceedings Papers

Paper presented at the SPE European Formation Damage Conference, May 31–June 1, 1999
Paper Number: SPE-54743-MS
... sand characteristics such as average size (D50) and uniformity (D40/D90). A well productivity model has also been developed to assist in screen selection. Using reservoir characteristics such as permeability, heterogeneity, consolidation, design flowrate and fluid characteristics, it shows...
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Proceedings Papers

Paper presented at the SPE Formation Damage Control Conference, February 18–19, 1998
Paper Number: SPE-39437-MS
... do not say anything about the potential for fines migration. That very important piece of information is still to be addressed by a sand strength model. The "D" designations in the table refer to the sieve size distributions (cumulative%). The D40/D90 ratio, for example, is the sieve opening...
Proceedings Papers

Paper presented at the International Oil and Gas Conference and Exhibition in China, June 8–10, 2010
Paper Number: SPE-136734-MS
... analysis in Well NB35-2-1 (1025.5 – 1142.0 m) indicates the following: D50 ≈ 226 μm, D10/D95 ≈ 18, D40/D90 ≈ 5.3 and fines percentage (<44 μm) ≈ 5.4%, the method of particle-size measurement is dry sieve, Fig. 7 shows the result. Core analysis in Well A11(1031.2 – 1091.4 m) indicates the following...
Proceedings Papers

Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, May 21–23, 2014
Paper Number: SPE-169376-MS
.... The characterization includes petrophysical analysis, grain size distribution, mineralogy, electron microscopy, rock mechanics, etc. Granulometric criteria are the most important to be considered for selecting alternative of exclusion and / or sand management, these criteria are: 1. D40/D90: Coefficient...
Proceedings Papers

Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, May 21–23, 2014
Paper Number: SPE-169380-MS
... criteria and resultant completion techniques to optimize flow rates in sand control completion, was defined according to three factors: The Uniformity Coefficient (Uc) is defined as the ratio of the forty-percentile sand size (D40) to the ninety-percentile sand size (D90). For values less than 3...
Proceedings Papers

Paper presented at the International Oil and Gas Conference and Exhibition in China, June 8–10, 2010
Paper Number: SPE-130559-MS
... oil properties in this zone. Additionally, the table 3 shows the results of the percentiles (D50, D40, D10, D90, D95), and the sum of grain with sizes minor than 45 micron (Submesh 325) the uniformity and sorting coefficients (D40/D90 and D10/D95). Several authors and field experiences have...
Proceedings Papers

Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, April 16–18, 2012
Paper Number: SPE-152887-MS
... – Coefficient of Uniformity (CU): D40/D90 – Relations between maximum and minimum particles common sizes: D10/D95. – Number of particles smaller than 44 μM: Sub 325 Mesh. The Table 1 shows the ranges of different granulometric criteria and guidance sieve analysis associated...
Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Formation Damage Control, February 24–26, 2016
Paper Number: SPE-179023-MS
... by the uniformity coefficient (d40/d90) and the gravel pack is described by the apparent pore size of the gravel. This approach allows laboratory performance testing for solids production, size of solids and retained permeability to be directly compared for gravel pack completions and for screen only completion...
Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Formation Damage Control, February 23–24, 2022
Paper Number: SPE-208845-MS
... by the uniformity coefficient (d40/d90) (2006). This effective formation size has been shown to provide an accurate way of determining what ratios of formation particle sizes to screen opening sizes optimally control sand production for a given formation particle size distribution range ( Fischer, 2016...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2013
Paper Number: IPTC-16449-MS
... showed a table summarizing the recommendation of screen type and sand control completion method all based on particle size distribution data. The D designations in the table refer to the sieve size distributions (cumulative The D40/D90 ratio, for example, is the sieve opening (in inches, mm or microns...
Proceedings Papers

Paper presented at the SPE Middle East Oil & Gas Show and Conference, March 6–9, 2017
Paper Number: SPE-183737-MS
... sieve analysis on offset well. D40 D50 D90 Unconformity Coefficient (D40/D90) Recommendation 0.0145 0.0127 0.0096 1.5 12/20 gravel with 20 lb screens Fluid Loss Control Fluid loss represents a very challenging parameter when treating a long interval that has...
Proceedings Papers

Paper presented at the European Formation Damage Conference, May 30–June 1, 2007
Paper Number: SPE-107539-MS
... µm D40 700 µm 120 µm 240 µm 420 µm 300 µm 175 µm 210 µm 96 µm 295 µm D50 620 µm 100 µm 210 µm 380 µm 270 µm 155 µm 175 µm 44 µm 255 µm D90 280 µm 14 µm 70 µm 101 µm 150 µm 31 µm 28 µm 3 µm 88 µm D95 98 µm 5 µm 23 µm 60 µm 23 µm 13 µm 7 µm 2 µm 20 µm...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, September 9–11, 2003
Paper Number: SPE-80450-MS
... sieve analysis plot represents a high degree of sorting (most of the formation sand is in a very marrow size range) versus a more nearly horizontal plot which indicates poorer sorting. A sorting factor, or uniformity coefficient, can be calculated as follows: (1) C=d40/d90 Where: C...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202877-MS
... sample. The "D" designation denotes grain diameter at a specific CDF, e.g. D10 corresponding the grain diameter at the CDF of 10%. Parameter Average Sample 3 D10 (µm) 655 1316 D40 (µm) 500 791 D50 (µm) 262 176 D90 (µm) 236 147 D95 (µm) 150 80 Submesh...
Proceedings Papers

Paper presented at the SPE International Symposium and Exhibition on Formation Damage Control, February 15–17, 2006
Paper Number: SPE-98363-MS
... after SPE 64398, Gillespie, et al . Formation Particle Size Data Screen Rating (micron) Produced Solids(lb/ft 2 of Screen Surface) d50 (micron) Uniformity (UC)(d40/d90) 114 7 250 0.250 114 7 200 0.145 114 7 115 0.119 124 3 200 0.164 250 3 250 0.342...
Journal Articles

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