Abstract:

According to the study of Mr.Guan Shicong et al.,Mesozoic and Cenozoic continental oil-and gas,bearing basins in Eastern China can generally be divided into two types:trough basins and broad basins Here chemical properties of oilfield water in these basins are discussed. Oilfield water in broad basins show single clustering patterns,enriched ions provided by factor 1 of factor analysis,little changes in mineralization,similar chemical properties of different basins formed in the same geological ages,high migration rate of chlorine-bearing water,lower content of phenol,higher content of benzene,lower average content and small changes in concentration of trace elements such as Li,Rb,Cs,Cu,Mn,Ni,V,etc. Whereas things are quite the opposite in trough basins. It seems that their differences might result from attributes of these basins,sedimentary formations and later modification.