ERHC Energy Inc (ERHE)

[ERHClongtimer]

Hydrocarbon Characteristics

In the Doba and Doseo Basins, medium to high gravity crudes of similar quality in the Lower Cretaceous have been tested at rates up to 2,200 b/d oil. The oils are paraffinic, API gravity ranges from 23.8o to 39o and averages around 34o. Gas oil ratios measure 200-12,000 scf/STB, however the oil is generally undersaturated. In Doseo, one well tested a gas cap of 8.3 million cf/d. Oil pour point range from 4.4oC to 38oC, but most commonly they are 24o to 32oC, and viscosities are low at around 4 centistokes at reservoir conditions. Sulfur content by weight is 1% to 2.9% in Doba and less than 0.04% in Doseo. The oils may be in stacked reservoir with multiple oil water contacts.

In the Doba Basin, the second oil type consisting of heavy to medium grades, has been tested at rates of up to 2,368 b/d in the Upper Cretaceous. These crudes are generally viscous, varyingly biodegraded, waxless, with API's from 15o to 24.6o. Their gas oil ratio is less than 15 scf/STB, pour points are low—12oC to 7oC and sulfur content is 0.002% or less. This oil type was source from the Lower Cretaceous.

http://www.oilandgasonline.com/article.mvc/Chad-Prepares-to-Be-an-Oil-Producer-0001