On April 7, 2013, I obtained this screenshot:
Notice the following:
Heavy Sour Conventional
Density (kgm/m3): 914-932
Gravity (API): 20-24
Heavy Sour Dilbit (Wabasca Heavy)
Density (kgm/m3): 923-935
Gravity (API): 19-22
On April 14, 2013, I obtained this screenshot:
Notice the following have all changed
Heavy Sour Conventional (Wabasca Heavy moved here)
Density (kgm/m3): 914-935
Gravity (API): 19-24
Heavy Sour Dilbit
Density (kgm/m3): 923-931
Gravity (API): 20-22
Here is a summary of the changes.
- Wabasca Heavy reclassified from "Heavy Sour Dilbit" to "Heavy Sour Conventional"
- The high-end of the density range of "Heavy Sour Conventional" has be INCREASED from 932 to 934 kgm/m3.
- The high-end of the density range of "Heavy Sour Dilbit" has been LOWERED from 935 to 931 kgm/m3.
- The low end of the range of API gravity of "Heavy Sour Conventional" has been LOWERED from 20 to 19.
- The low end of the range of API gravity of "Heavy Sour Dilbit" has been INCREASED from 19 to 20.
|April 7, 2013||April 14, 2013|
|Heavy Sour Conventional
||Heavy Sour Conventional|
||(Wabasca Heavy moved here)
|Heavy Sour Dilbit||Heavy Sour Dilbit|
| (Wabasca Heavy)
So let's assume that Wabasca Heavy has a density of 933-935 kgm/m3,
and an API of 19.
So what Crudemonitor.CA has done is redefined Heavy Sour Conventional
and Heavy Sour Dilbit so that a product with these specifications could be
moved from Dilbit to Conventional.
This is an industry website, so we can imagine they print
whatever Exxon-Mobil tells them to print.
Again: Exxon Mobil seems hell-bent on preventing the public from thinking that what was in that pipeline was Dilbit.
Why is this?
- Dilbit implies Alberta Tar Sands, and Keystone Pipeline, which are both hotly opposed by environmentalists.
- Dilbit is more corrosive than conventional crude oil.
- Dilbit is heavier and stickier, and requires higher heat and pressure in the pipeline. Higher sustained pressures may lead to failures, especially with aging pipelines.
- Higher viscosity pipelines are more subject to impulses from cavitation and fluid hammer which can lead to failure.
- Dilbit pipelines may be more prone to undamped resonances which can lead to failure. This is known as the "Kohlhase Effect". see: http://williamahuston.blogspot.com/2012/10/very-interesting-are-all-pipelines.html