【摘要】 针对河南特稠油开采难题研制出耐高温复合降黏剂WP,其既可随高温蒸汽注入井下实现蒸汽吞吐、蒸汽驱采油,也可随热水注入井下达到热水驱采油,能有效降低油水界面张力,其所形成的特稠油乳状液在高温和常温下均能保持低黏度和均匀稳定性,为实现特稠油乳化降黏低温开采和常温输送提供了依据。实验结果表明:WP加入量为0.128 mg(以每克特稠油计)时,30℃时可使2#河南特稠油的黏度由252.0 Pa.s降至其乳状液时的9.6 mPa.s,降黏率达99.99%;考察了WP的耐高温性能以及影响WP表面性能和降黏性能的因素,并初步探讨了其表面性能和降黏性能的关系,对WP的降黏机理及其所形成特稠油乳状液的稳定机理也进行了探讨。更多还原

【Abstract】 A high temperature resistant composite for viscosity-reducer,WP,is developed to solve the problem of extra-viscous oil extraction,which is suitable for oil production of steam stimulation,steam and hot water flooding.WP can reduce the oil-water interfacial tension remarkably,and the formed crude emulsions have a low viscosity and are stable for both high and normal temperatures.It provides basis for realizing the recovery in low-temperatures and transportation in normal-temperature of extra-viscous oils,energy saving to reduce the production costs.The experiments show that the viscosity of Henan extra-viscous oils No.2(at 30 ℃) is decreased from 252.0 Pa·s to 9.6 mPa·s when adding dosage of WP as(0.128 mg/g) in crude,the viscosity reduction rate of which is 99.99%.In this paper,the heat-resistant performance of WP,the main factors influencing surface properties and viscosity reducing properties of WP as well as the relation between surface properties and viscosity reducing properties of WP are investigated.The viscosity reduction mechanism of WP and the stabilization mechanism of extra-heavy crude emulsion with it are discussed.更多还原