Research On Distribution And Evolution Of The Soil Substance Leaked Out Of The Development Liquid Around The Oilfield

The soils polluted by substance leaked out of the development liquid exist in oilfield universally. To find entirely distribution and evolution of substance leaked out of the development liquid is the prmise to control pollution in soil.In this paper, by taking the large unitization oilfield(Shengtuo oilfield) as an example, we have carried out field sampling in the oil region which located at Hougou Village Kenli Town Kenli County Dongying. Then have the indoor tests analysis to the soil sample, the testing parameters include elements Cd,Cr,Cu,Pb,Zn,Ni,F,As,Hg,P and petroleum content. Based on the experimental data which from test, the distribution and evolution of fluid leakage which nearby the wellsite of oil, has been carried out by using ways of statistical analysis, regression analysis, mathematical modeling and so on. Following achievements have been gained in this study: firstly, expounded the distribution of oil substance in the soil nearby the wellsite. Secondly, discussed the abnormal distribution of trace elements, and talked about the influence of oilfield exploration and development on trace elements. Thirdly, revealed the evolution of oil substance and trace elements which influenced by the oilfield exploration and development. Fourthly, the soil environmental quality which nearby the wellsite was evaluated by the Nemerow Pollution Index, then draw a conclusion that petroleum content has suffered from serious pollution, elements Cd, Cu, Pb, Zn, Ni,As, Hg cleanness(safety) and Cr still cleanness(warning limits).The finding in this paper will provide an important directive evidence for the pollution control and treatment measures in the process of oilfield exploration and development, and provide reference data for the oilfield development and environmental protection of production zone.