HUANG Hai1,2, QU Zhan2, ZHOU Li-hui3, SUN Wei1
（1 Department of Geology， Northwest University, Xi′an 710075,Shaanxi,China; 2 College of Petroleum Engineering, Xi′an Shiyou University, Xi′an 710065,Shaanxi,China;3 Oil and Gas Technology Research Institute of Changqing Oil Field, Xi′an 710021,Shaanxi,China）
Abstract:
In order to investigate the potential pollution of abandoned drilling fluid for the atmosphere, soil, surface water and ground water, fifteen samples were selected according to the geological characteristics of oil field in Ordos Basin. The optimum microwave digestion condition to treat sample was obtained, and the heavy metals content in different samples was measured. The results showed that all specified heavy metals were detected but the levels were too low to be harmful to the entironment. The contents of Hg,As,Cr and Sn showed obviously a geographic variation.
KeyWords:
Ordos basin; abandoned drilling fluid; heavy metal pollution
