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Present study was conducted to analyse the physio-chemical parameters of produced water of Dakni oil field, Punjab, Pakistan and their effects on surrounding soils. Some of the parameters were analysed on the spots and rest were analysed in the Laboratory by using standard methods. The results of physical parameters of produced water i.e. pH and TDS were ranged from 5.5-7.5 and 2620-82600 mg/l, respectively. According to Pak-EPA standards pH of produced water lies within the defined limits and TDS is much higher than the limit defined by pak-EPA. Results of ion analysis in produced water samples indicate that levels of sodium (Na), potassium (K), calcium (Ca), megnisium (Mg), floride (F) and chloride (Cl) ranged from 802-1452; 9.6-710; 396-6544; 123-654; 1-3.3 and 6368.23-31831.19 mg/l respectively. Standards for these ions except F and Cl are not defined by Pak-EPA. F is within permissible limit while Cl values is much higher than Pak-EPA. Heavy metal results showed that manganese (Mn) and chromium (Cr) ranged from; 1.12-3.66 and 1.3-1.8, respectively. These were compared with Pak-EPA which showed that chromium and manganese were above the permissible limit. In soil sample the same parameters were assessed and found in very high concentrations. From the present study it is concluded that produced water showed highly contamination of pollutants so it should be treated before releasing into the surrounding environment in order avoid the impacts.

PHYSICOCHEMICAL CHARACTERISTICS OF PRODUCED WATER FROM DAKHNI OIL FIELD, PUNJAB, PAKISTAN AND ITS EFFECT ON SURROUNDING SOIL