RECOVERY OF OIL FROM PRODUCED WATER

Tagelsir Awad Ahmed Digno

Abstract


The study was conducted in Malute Basin Block 3 and 7 located in the Republic of South Sudan in
Palouge Field. Produced water is a mixture of organic and inorganic materials. Produced waters
characteristics depend on the nature of the producing/storage formation from which they are withdrawn,
the operational conditions, and chemicals used in process facilities. The composition of produced water
from different sources can vary by order of magnitude. However, produced water composition is
qualitatively similar to oil produced the major compounds of produced water include: Dissolved Oil,
Dissolved formation minerals, Production chemical compounds, Production solids (including formation
solids, corrosion and scale products). The data were collected using different methods: chemical and
physical analysis, Analysis of produced water to study the effect and volume of dissolved oil in produced
water. The study aimed to assess recovery of dissolved oil in produced water using produced water
treatment package. Analysis run for 31 Samples of produced water which were taken within 31days. Oil
in water was measured using HACH DR/4000 Spectrophotometer .Results showed that the total
dissolved oil in water is in the range 96.68 to 847.43 mg/L inlet in Palouge field and from 21.51to 83.33
mg/L outlet .Then random samples were analyzed from Adar Field ,Moleeta Field, and Gumry Field ,to
assess quantity of Total petroleum hydrocarbon (TPHC). Besides, many chemical treatments, whose
initial and/or running cost are high and produce hazardous sludge. The most important study
recommendations are to decrease the effect of discharging produced water to underground and surface
water and reduce cost of handling of produced water by using a relatively new technology to separate oil
and gas from produced water at the bottom of the well.

Keywords


Oil and Grease, Palouge Oilfield, Total Petroleum Hydrocarbon, Adar Field.

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