Frac Sand

Frac Sand

Frac sand is used to improve production from oil and gas wells, sometimes pressure is used to fracture the rock formations to allow better flow of the hydrocarbons to the wellbore. When the pressure is removed, however, the fracture that was created closes back up which dramatically diminishes the effectiveness of the fracture.

Frac sand is pumped into the well during the fracturing operation. Since the sand is carried along with the fluid into the fracture, it will remain in the fracture when the pressure is removed, keeping the fracture propped open and allowing a good means by which the hydrocarbons can flow to the wellbore.

Grade Sizes:

  • 20/40
  • 30/50
  • 40/70
  • 100 mesh

Loss From Washing

Sample ID Dry Prewash Wt (g) Dry Postwash Wt(g) Grams Lost % Loss
WWS-20/40 4813.48 4801.27 12.21 0.25
WWS-100M 1564.80 1551.70 13.10 0.84

Sieve Analysis of Submitted Proppant Samples

 ISO 13503-2:2006/API RP19C:2008, Section 6, “Sieve Analysis”
Sample I.D. WWS-20/40 WWS-30/50 WWS-40/70 WWS-100M
US Standard Weight % Weight % Weight % Weight %
Sieve No. Retained Cumulative Retained Cumulative Retained Cumulative Retained Cumulative
6 0.0 0.0 0.0 0.0
8 0.0 0.0 0.0 0.0
10 0.0 0.0 0.0 0.0
12 0.0 0.0 0.0 0.0
14 0.0 0.0 0.0 0.0
16 0.0 0.0 0.0 0.0 0.0
18 0.0 0.0 0.0 0.0 0.0
20 0.0 0.0 0.0 0.0 0.0 0.0
25 7.1 7.1 0.0 0.0 0.0 0.0
30 17.9 25.1 0.1 0.1 0.0 0.0 0.0
35 29.4 54.5 13.6 13.6 0.0 0.0 0.0
40 41.0 95.5 23.4 37.0 0.3 0.3 0.0 0.0
45 4.4 100.0 26.6 63.6 25.6 25.9 1.1 1.1
50 0.0 100.0 35.6 99.2 28.9 54.8 2.0 3.2
60 100.0 0.8 100.0 25.9 80.7 6.7 9.9
70 100.0 0.0 100.0 18.1 98.8 16.0 25.9
80 100.0 100.0 1.2 100.0 24.3 50.2
100 100.0 100.0 0.0 100.0 24.7 74.9
120 100.0 100.0 100.0 15.6 90.5
140 100.0 100.0 100.0 6.4 96.8
170 100.0 100.0 100.0 2.2 99.1
200 100.0 100.0 100.0 0.7 99.8
230 100.0 100.0 100.0 99.8
pan 0.0 100.0 0.0 100.0 0.0 100.0 0.2 100.0
total 100.0 100.0 100.0 100.0
in-size 95.5 = as 20/40 99.1 = as 30/50 98.5 = as 40/70 93.7 = as 50/140
ISO Mean Dia. (mm) 0.542 0.406 0.311 0.187
Median Dia. (mm) 0.532 0.397 0.305 0.178

Used In Hydraulic Fracturing and Gravel-Packing Operations

 ISO 13503-2:2006/API RP19C:2008, Section 7, “Proppant Sphericity and Roundness”
* mean of a 20 count
Sphericity = 0.7
Roundness = 0.7
Clusters = None Observed in Field of Count
Recommended Sphericity and Roundness for proppants = 0.6 or greater (ISO/DIS 13503-2/Amd.1:2009)
ISO 13503-2:2006/API RP19C:2008, Section 8, “Acid Solubility”
* mean of 3 analyses
Acid Sol. Percent = 0.7%
Recommended Maximum Acid Solubility for proppants 6/12 thru 30/50 = 2.0% (ISO/DIS 13503-2/Amd.1:2009)
Tested as per ISO 13503-2:2006/API RP19C:2008, 100ml of 12:3 HCl:HF* with 5 grams of sand or proppant at 150oF for 30 minutes, *Other acids may be
specified, depending on desired application
ISO 13503-2:2006/API RP19C:2008, Section 9, “Turbidity Test”
Turbidity = 15
Method 1: Turbidity, suggested maximum proppant turbidity = equal or less than 250 NTU (ISO/DIS 13503-2/Amd.1:2009)
NTU
ISO 13503-2:2006/API RP19C:2008, Section 10,
“Procedures for Determining Proppant Bulk Density, Apparent Density”
Bulk Density =
Bulk Density =
Apparent Density = (Oil)
1.57
98.0
2.62
g/cm3
lb/ft 3
g/cm3
ISO 13503-2:2006/API RP19C:2008, Section 11, “Proppant Crush-Resistance Test”
% Fines
Stresses Tested (psi) -20+40 crush prep
4000 6.8%
6000 9.2%
7000 11.8%
K-Value = 6K
The highest stress level which proppant generates no more than 10% crushed material, rounded down to the nearest 1000psi = K-Value

Measurement of Properties of Proppants

 Used In Hydraulic Fracturing and Gravel-Packing Operations
 ISO 13503-2:2006/API RP19C:2008, Section 7, “Proppant Sphericity and Roundness”
* mean of a 20 count
Sphericity = 0.7
Roundness = 0.7
Clusters = None Observed in Field of Count
Recommended Sphericity and Roundness for proppants = 0.6 or greater (ISO/DIS 13503-2/Amd.1:2009)
ISO 13503-2:2006/API RP19C:2008, Section 8, “Acid Solubility”
* mean of 3 analyses
Acid Sol. Percent = 0.7%
Recommended Maximum Acid Solubility for proppants 6/12 thru 30/50 = 2.0% (ISO/DIS 13503-2/Amd.1:2009)
Tested as per ISO 13503-2:2006/API RP19C:2008, 100ml of 12:3 HCl:HF* with 5 grams of sand or proppant at 150oF for 30 minutes, *Other acids may be
specified, depending on desired application
ISO 13503-2:2006/API RP19C:2008, Section 9, “Turbidity Test”
Turbidity = 8
Method 1: Turbidity, suggested maximum proppant turbidity = equal or less than 250 NTU (ISO/DIS 13503-2/Amd.1:2009)
NTU
ISO 13503-2:2006/API RP19C:2008, Section 10,
“Procedures for Determining Proppant Bulk Density, Apparent Density”
Bulk Density =
Bulk Density =
Apparent Density = (Oil)
1.54
96.1
2.63
g/cm3
lb/ft 3
g/cm3
ISO 13503-2:2006/API RP19C:2008, Section 11, “Proppant Crush-Resistance Test”
% Fines
Stresses Tested (psi) -30+50 crush prep
4000 1.8%
8000 8.2%
9000 11.7%
K-Value = 8K
The highest stress level which proppant generates no more than 10% crushed material, rounded down to the nearest 1000psi = K-Value