The research on environmental protective drilling fluid system included the biotoxicity inspection method and standard of the environmental protective drilling fluid material, the development and selection of high grade environmental protective treatment materials and the research on the formular of the environmental protective drilling fluid system. 环保型钻井液体系的研究内容包括环保型钻井液材料生物毒性检测方法及标准的研究,优质环保处理剂的研制或遴选以及环保型钻井液体系配方的试验研究。