Near wellbore impairment result from various factors such as mud invasion, filter cake deposition, and fines migration in producing fields. Micro Emulsion Chemistry, other than the traditional acid stimulation presents a new and novel remedial treatment for near wellbore impairment. A microemulsion is a typical Newtonian fluid system distinguished from emulsions owing to its being stable thermodynamically and self-organizing. This technical paper explains the process of candidate selection, data gathering, job execution, and resultant crude oil gain from deploying micro-emulsion technology (MET) on some strings in the Ogini and Isoko fields. The fields have different and unique challenges. While the Ogini field has characteristic heavy oil and viscous crude, the Isoko field has wax deposition challenges. Deploying MET treatment in both fields yielded record-breaking results and productivity (PI) improvements in multiple folds. A total of 3,500 bopd (incremental oil) was achieved from treatment on four strings in both fields.
Animal feed concentrates were produced from Soursop (Annona muricata) and Pineapple (Ananas comosus) peels using Aspergillus niger and Aspergillus flavus in a solid state fermentation process. Soursop, pineapple and mixture of soursop and pineapple peels were inoculated with these isolates and incubated for 144hours. The result showed decrease in cellulose and increase in sugars after 144 hours of fermentation. The range in the decrease in cellulose was observed to be between 69 and 86% while increase in sugars ranged from 219 to 335%. Crude protein levels also increased in the peels considerably after 144 hours of incubation with the highest percentage observed in soursop (48%) This reveals that these fungi digested the non polysaccharide in soursop and pineapple peels converting them to soluble sugars with significant increase in the protein. Thus, fermentation increase nutritional value of pineapple and soursop making them digestible in animals, hence it can be used as concentrates in formulating animal feeds.
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