| Environment pollution for oilfield development damaged mainly the atmospheric, soil and vegetation of surface, water resources and marine biological as research object in the Bohai Bay oilfield. Pollution sources produced in the oilfield development process were analysised by physical, chemical and biological methods. On the basis of field investigation and laboratory simulation experimental, pollutants have measured research and quantitative evaluation.Oilfield development of each step can produce environmental pollutants. On the basis of date comparison, field investigation and laboratory simulation of Island oil production plant in Shengli Oilfield, we think waste gas, which is produced in the oilfield early drilling well process, is composed of harmful gas, particles property, and industrial emission. The paper considered the primary pollutants from waste gas emission are total hydrocarbon and suspended particles. Air pollution can reduce though improvement of technics process and green afforestation. Under the result of soil sampling analysis near the Islands production factory, containing oil mud and landing crude oil produced in the oilfield development process polluted the soil. The detection showed the oil content in soil are more greatly than critical value (500mg/kg), and the nearer to oil well, the higher the oil content. By the study of soybean experimental, oil can effect the growth of vegetation. When the crude oil is higher than 400mg/kg, the index including emergence rate, strains heritability, number of knot pod, the production of single strains of soybean have decline substantially, and it can inhibit the soybean growth obviously. This can caused crop of production. Wastewater and drilling fluids can damage to the shallow groundwater and marine life. By the test of underground water, it showed that the common indicator for water quality, CODcr, and ammonia and nitrogen are higher than the standard. The chloride concentration and total hardness is higher. These declined water quality of the oil production area, and coused of hazardous to the ecological environment. Based on laboratory results of toxicity simulation experiments, drilling fluids of different concentrations and different varieties can inhibit growth rate of aquatic organisms including Zebrafish, Chlorella and so on. And they can effact the survival rate of Zebrafish. |
