Abstract
According to the property of the viscous crude oil in China, ORV (oil-base viscosity reducer) and HEA (water-base viscosity reducer) have been developed. ORV oil-base viscosity reducer which is composed of high molecular weight polymer, surfactants and other additives etc., has a good viscosity-reducing effect for the viscous crude oil with low or medium viscosity, at the dosage of 100 to 300mg/kg, viscosity was reduced by 60% to 80%, in the same time, has a good pour point-reducing effect for high pour point crude. HEA water-base viscosity reducer which is composed of surfactants, stabilizer and other additives etc., has a very good viscosity-reducing effect for the viscous crude oil with high viscosity, at dosage of 50~200mg/kg, viscosity was reduced by above 99%. Above-mentioned two reducers have already used in Jidong, Liaohe and Shengli etc. oilfields, a better application effect and a tremendous economic benefit (according to the incomplete statistical data, that of ORV is 13.5 million yuans RMB per year, and ratio of input to output is 1:11; that of is 20 million yuans RMB per year, and ratio of input to output is 1:26.2) were abtained. And moreover, HEA viscosity reducer has a good high temperature-tolerant ability and can be used as the spearhead chemical agent for steam soak, ORV viscosity reducer has pour point-reducing and wax-inhibiting functions.
