In order to deal with the waste drilling fluid in Jiangsu oilfield

we proposed to add additives to the waste drilling fluid

and made a kind of waste drilling fluid profile control agent. In the laboratory experiments

by the physical properties of waste drilling fluid and particle size

we filtered out the suitable profile control formula. Then we obtained the optimum dosage of each additive from the experiments: the suspension of 0.20 %

dispersant 0.30 % and curing agent 5.0 %. The developed waste drilling fluid profile control agent had good suspension stability

curing properties and plugging performance. It could not only solve the problemsof waste drilling fluid

but also reduced the production cost of plugging agent

moreover

it had great significance to the production of oil.