User:Andrebenoit18

The Angola Basin The Angola Basin is a divergent boundary with irregular occurrences of uplift.The Kwanza Basin is a sub-basin located in the Southern region of the Angola basin near the continent of Africa.In this basin there is a extremely thin layer of salt although the surface shows many signs of a large quantity of salt. The hydrocarbon building process began in the Cretaceous period.

Comments by Evan Baynes

Primarily, what currently exists isn't so much of a rough draft as it is a string of four fragmented sentences.

I think one thing that can help is if you narrowed your scope because the whole basin is too wide a breadth. Limiting your page to a particular field (or even area within the Kwanza basin) can give you some important data to combine along with the specifics of the geology of the basin. For example, I picked the Chukchi Sea oil which is a basin that is not producing, so I limited my scope to the test wells and tried to hone in specifically on the burger test block. The Angola Basin is being exploited, so I think you should not have the same difficult I had.

Start by giving specifics of the formation of the basin. You say it is a divergent boundary, so when did rifting begin? What layers within the basin indicate rifting? Which stratigraphic layers are before rifting and which are post rifting? Which stratigraphic layers are the reservoir rocks? When were they formed? What are their characteristics? (Are they know for being particularly high permeability or high porosity, over pressured, ect.) What are the source rocks? When were these source rocks formed? Are there any uncomformities that bound the sequences to make identifying layers easier? Your fourth and final sentence saying that "The hydrocarbon building process began in the Cretaceous period. " is a vapid statement unless you more rigorously complete the thought. Is this when the reservoir rocks formed or source rocks formed. Or is this an unconventional where these two things are the same thing?

Once you have answered these questions you can delve into specifics about a certain field. For example, the Chukchi basin that I wrote about was formed through rifting while the Brooks mountain range was being formed. This led to increased sedimentation within the Sea. The tectonic activity created folds containing anticlines and numerous pinch out wedge traps. However, the burger test well that I tried to focus on was a dome structure that Shell predicted would be loaded with oil. Are there any consistent structures in the Angola basin? What about the Kwanza Basin? Are most of the fields structural or stratigraphic traps or both?

Since the area is being exploited, are there any technical issues with the large quantity of salt. It is hard to use imaging to see details below the salt; this is a problem with the massive Luann salt domes that exist in the Gulf of Mexico. But hydrocarbons are commonly found in the regions around and below salt domes, is this the case in the Kwanza basin?

"The Angola Basin is a divergent boundary with irregular occurrences of uplift.The Kwanza Basin is a sub-basin located in the Southern region of the Angola basin near the continent of Africa.In this basin there is a extremely thin layer of salt although the surface shows many signs of a large quantity of salt. The hydrocarbon building process began in the Cretaceous period. "

This is what you have thus far; it is not a rough draft. It is a poor excuse for "having started" the assignment. The Angola Basin is NOT a divergent boundary, it may have been formed DUE TO a divergent boundary. The thin layer of salt exists, OK, how does this help us understand the basin? When did the salt form? Was it due to transgression? I already critiqued your fourth sentence above. This needs some major work to even begin approaching and failing grade.