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针对蒙古林严重非均质层状普通稠油油藏,在各种物理模型上研究了可动凝胶的调驱作用。实验用原油38℃密度0.8878 g/cm3,黏度255.4 mPa.s。可动凝胶由800 mg/L聚合物(北京恒聚EORPAM-4)和17.8 mg/L羧酸铬乳液在清水中配成。并联双管模型水驱至含水98%后注入0.2 PV可动凝胶,再水驱时高渗管(2.58μm2)产液量大幅下降,采出程度有所增大,低渗管(0.151μm2)产液量和采出程度大幅上升。在仿真微观模型上观测到了可动凝胶堵塞大孔道,扩大波及范围,残余油向出口富集等现象。在直径5 cm、长87.21 cm、水测渗透率0.639μm2的长填砂管中,注入0.3 PV可动凝胶及后续注水初期注入压力迅速升高,此后缓慢下降并稳定在较高水平,原油采收率提高6.6%。从2002年开始到2008年6月,在蒙古林油田先后开展了可动凝胶调驱先导试验、扩大试验、Ⅰ区推广、工业推广,预计提高采收率4.18%~5.14%。讨论了可动凝胶的生产特征:注入压力上升,转注水后趋于稳定;堵塞大孔道;注采剖面调整。
Aiming at the heavy heterogeneous lamellar common heavy oil reservoirs in Mongolian forest, the mobilization and mobilization of mobile gels were studied on various physical models. Experimental crude oil 38 ℃ density 0.8878 g / cm3, viscosity 255.4 mPa.s. The mobile gel is made up of 800 mg / L polymer (Beijing Hengju EORPAM-4) and 17.8 mg / L chromium carboxylate emulsion in clear water. The parallel double tube model was flooded to 98% water and injected with 0.2 PV movable gel. When the water flooding was completed, the yield of high permeation tube (2.58μm2) dropped drastically and the degree of recovery was increased. The permeability of low permeability tube (0.151μm2 ) The volume of liquid production and recovery increased substantially. Observed in the simulation of the micro-model of the movable gel plug large pores, to expand the scope of the spread of residual oil to the export enrichment and so on. In the long sand filled tube with diameter of 5 cm, length of 87.21 cm and water permeability of 0.639 μm 2, 0.3 PV movable gel was injected and the injection pressure rapidly increased at the beginning of subsequent water injection, then slowly decreased and stabilized at a higher level. Crude oil Oil recovery increased by 6.6%. From the beginning of 2002 to June 2008, the pioneer test of movable gel drive and control has been carried out in Mengulin oilfield. The pilot project has been expanded to promote the zone Ⅰ and promote industrialization. The recovery rate is expected to increase from 4.18% to 5.14%. The production characteristics of the movable gel are discussed: the injection pressure is increased, stabilized after the injection of water, the large pore is blocked, and the profile of injection and production is adjusted.