应用降粘剂提高大港稠油油藏水驱采收率  

USING VISCOSITY REDUCER TO IMPROVE THE WATER FLOODING EFFECTIVENESS IN DAGANG VISCOUS CRUDE PRODUCTION

作　　者：张付生[1] 郭鉴[2] 张怀斌[1] 汪芳[1] 

机构地区：[1]中国石油勘探开发研究院油田化学研究所,北京100083 [2]商丘职业技术学院

出　　处：《石油炼制与化工》2009年第11期48-51,共4页Petroleum Processing and Petrochemicals

摘　　要：在对大港官109-1断块稠油组成及结构进行分析的基础上,针对油藏高温、高矿化度及水驱采出程度低的特点,研制出一种降粘剂。在含水量大于30%及降粘剂加入量大于1 000 mg/L(占油水总质量)的条件下,能使油水体系形成稳定的O/W型乳液,降粘率大于97%,且降粘剂的存在对采出液的破乳脱水没有负面影响。岩心驱油实验结果表明,降粘剂驱油体系比水驱体系稠油采收率提高22%以上,说明使用降粘剂可以降低油藏稠油粘度,改善水/油流度比,提高波及系数,明显改善水驱效果。On the basis of analyzing the components and structure of the viscous crude from zone 109-1 in Dagang oilfield,a high effective viscosity reducer was developed for high temperature and high mineral salt reservoir. The mixture of water and viscous crude could form a stable O/W emulsion when using the developed viscosity reducer having water content of more than 30% and with an added dosage of 1 000 mg/L（based on the total amount of water and viscous crude）. The viscosity reduction rate was more than 97% and no negative effect was observed on the demulsification of produced liquid having viscosity reducer. The results of core flood experiments showed that the oil recovery rate of displacement system containing viscosity reducer increased by 22% as compared with that of water flooding system, which indicated that with the decrease of crude viscosity, the oil-water mobility ratio was improved, the sweep efficiency was increased and the oil recovery was enhanced significantly.

关 键 词：稠油 水驱 采出程度 降粘剂 采收率 

分 类 号：TE345[石油与天然气工程—油气田开发工程]