Strategic Petroleum Reserve
Crude Oil Assays

 

The Strategic Petroleum Reserve (SPR) contains a number of domestic and foreign crude oils.  For the most part, these are of light gravity (30 to 40 API) and contain less than 2.0 mass percent total sulfur.  These crude oils are not segregated in storage but are commingled according to their sulfur content into two categories - one sweet and the other sour.  For the purposes of the SPR, sweet crude oils are defined as containing a maximum of 0.50 mass percent total sulfur, while sour crude oils can contain up to a maximum of 1.99 mass percent total sulfur.  Only similar quality crude oils are commingled in storage, with no mixing of sweet and sour streams being practiced.

 

The crude oil inventory comprising each of the eight SPR streams is stored in from two to 13 caverns, depending on the site.  The attached assays for these eight streams is a volumetric average of the assays for the individual caverns comprising each stream.

 

Any questions regarding the assays or the analytical methods used in obtaining these should be addressed to Mr. Ray Ortiz, Industrial Specialist, Petroleum Reserves, US Department of Energy, RM: 3G-070, 1000 Independence Ave. SW, Washington, DC 20585, tel: 202-586-4398, fax: 202-586-7919.

 

To ensure that the following assay files open properly as Excel spreadsheets, use the following procedure. Using the mouse, right click on each, select "Save Target As ...", then save in the folder of choice as a Microsoft Excel Worksheet.

Assay Files
(Microsoft Excel)

Bayou Choctaw Sweet Sour Piano Sweet Piano Sour
West Hackberry Sweet Sour Piano Sweet Piano Sour
Big Hill Sweet Sour Piano Sweet Piano Sour
Bryan Mound Sweet Sour Piano Sweet Piano Sour

 

Assays for Test Sale 2014

 

Crude Oil Assay Manual

 
Link to Excel Viewer  
Click Here to download the Excel Viewer program

 

 

Posted: March 04, 2014