Experimental Study On Preparation Of Blocking And Anti-sloughing Agent With Oily Sludge

Oily sludge is the oily solid waste produced during the procedures such as: petroleum exploration and development,transportation,refining and oily wastewater treatment works.The emission requirements of this kind of wastes has becoming higher and higher according to national environmental regulations.Based on the analysis of composition and properties of oil sludge,we discussed its pretreatment,modification conditions and process routes,and finally we developed a cost-effective anti-sloughing drilling fluid blocking agent,expanding the oily sludge resource utilization field.The basic properties of oil sludge were analyzed and two technical ideas about how to transfer the oil sludge into anti-sloughing agent were determined.One is to make the agent through sulfonated asphalt procedures while the other one is to make the dispersed deformable blocking anti-sloughing agent by asphalt emulsion dispersion and other processes.The antisloughing agent SD-AS we developed has the following obvious characteristics: changeable softening point,high oil-soluble rate and excellent anti-sloughing ability.Tests shows its antisloughing mechanism such as: chemical adsorption,physical blocking by deformable particles and the reduction of shale surface hydrophilic property.Using SD-AS as the main treatment agent,strong inhibition polymer drilling fluid with temperature resistance up to 120 ? and poly-sulfonate drilling fluid formulation with temperature resistance up to 150 ?,showing great potential for future field trials,were constructed.