بررسي گسترش و تخمين مقدار نفت در آبهاي زيرزميني پالايشگاه آبادان

Assessment of Petroleum Leakage in Groundwater of the Abadan Refinery

Knowledge of petroleum leakage at oil refineries is vital for environmental study of water and soil pollution. Abadan Refinery is located between the Arvandrud and Bahmanshir rivers in the highly populated area of Abadan city. These rivers supply domestic, industrial, and agricultural water to Abadan city. During the war between Iran and Iraq, enormous volumes of oil and petroleum products leaked from storage tanks and pipelines at Abadan Refinery into the surrounding environment. The resulting pollution is a serious threat and a growing environmental concern for the region. In this work, twenty boreholes were dug to investigate petroleum leaks into the surrounding area both during and after the war. The thickness of petroleum floating on underground waters at the refinery was measured by sampling underground water over a period of one year along with measuring the piezometric heads of groundwater monitoring wells. Also, groundwater movement pattern at Abadan Refinery was determined by measuring the water table in each well over the same period. The results of sampling indicate that oil leaks were observed in just two wells; namely, wells No.3 and No.l 1. The results also show that the greatest portion of the oil spill in underground layers at Abadan Refinery was absorbed into clay soil.