PHYSICO-CHEMICAL ANALYSIS OF CRUDE OIL CONTAMINATED SOIL IN AND AROUND DIKOM OIL WELL OF ASSAMBorsha Tamuly and L.R. Saikia
North eastern India holds a unique position in the oil map of India because it was the pioneer of Indian oil industry. Exploration, drilling, transportation and accidental spillage in oil field areas often lead to the tremendous effects on soil and water as well as vegetation. A study was conducted to determine the possible effects of crude oil drilling activities in the soil in and around oil well. Soil samples were collected using soil auger during summer and winter seasons at a depth of 0-15cm and a distance of 50m (point A), 100m (point B) and 150meters (point C) from oil spilled site. The soil parameters pH, electrical conductivity, moisture content, porosity, water holding capacity, available nitrogen, phosphorus and potassium were analyzed. The pH of the soil sample recorded from 4.36 to 5.29 in summer and 4.67 to 5.76 in winter season. Soil moisture content, WHC, porosity, EC, phosphorous content was lowest in point A compared to point B, point C and point D(control) in both the seasons. Soil organic carbon (OC), nitrogen, potassium content was recorded highest in point A, point B and point C compared to point D.