Pollution to Gaotaizi reservoir by polymer-bearing waste water reinjection;

Pilot-plant of oily wastewater treatment for reinjection of low permeability oilfield;

Water quality problem of reinjection of gas field water and selection of reinjection well;

Pollution caused by different polymer content wastewater samples were investigated based on core analysis and water quality analysis of before and after re-injection.

Now the water quality of the treated effluent isimproved remarkably and the water quality of the re-injection effluent can come up.

The quality of the treated water was stable, and met the re-injection water standards of recom.

The rejection of the formation water can thoroughly not only solve the problem of how to deal with it but also can completely eliminate the environmental pollution.

The article presents a new method of rejection sludge caused by oilfield wastewater treatment.

Oily and sour sludge from rejection station of well No.

The artical introduces some conditions about wastewater recycle of FCCU in Jinxi Petrochemical Company, and the plan that has been proven is practical.

Processes to use treated water as recycle water,steam boiler water and to discharge are emphasized.

Technology and development of fine treatment of low permeable oilfield reinjection water;

Based on the characteristics of wastewater quality of a combined station in the low permeability reservoirs of Shengli Oilfield and the quality criteria of reinjection water,the dissolved air flotation(DAF)/three-stage filtration(rough filtration,fine filtration,ultrafiltration) process were used to treat the wastewater.