According to the geological characteristics of Dagang Oilfield,the methods for transforming abandoned oil well into geothermal well are discussed.

Exploiting geothermal energy from the abandoned well;

It has been used in the determination of chlorine ion content of the drilling waste water.

Because drilling engineering has great concealment and complexity, the total quantity of drilling waste water produced is large and unstable, the component is fairly complex, and concentration is not balanced.

The treatment present situation of drilling waste water in some gas fields of Sichuan Petroleum Administration is described, and the source, composition and characteristics of drilling waste water are analysed in this paper.

Factors in the treatment of drilling wastewater by biological method;

Treatment of petroleum pollutants from drilling wastewater by microbiological method;

Study on the effects of anion on drilling wastewater treatment by electrocoagulation-flotation process;