东河油田深部调驱技术实验研究
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摘要
针对东河油田油藏地层压力高、温度高和地层水矿化度高的特点,选用耐温耐盐聚合物SD7000研究并优化了适合该油藏的凝胶调驱体系,该体系配方为聚合物0.6%+高温交联剂0.3%+稳定剂0.08%+性能改进剂0.04%。评价了温度、矿化度、p H值三个因素对凝胶体系成胶性能的影响,结果表明:随着温度的升高,成胶时间变短,凝胶粘度先变大后变小;对p H值适用范围广,p H值在8~10时,成胶时间较短,凝胶粘度较大;随着钙离子浓度的增加,成胶时间变短,凝胶粘度基本不变;室内封堵实验表明,该凝胶体系封堵率达98%以上,具有一定的堵水作用。该研究对东河油田进一步提高水驱采收率提供了理论基础和技术支持,具有重要的指导意义。
Based on the reservoir characteristics in Donghe oilfield including high pressure, high temperature and high salinity of formation water,polymer SD7000 was selected to research and optimize profile control agents. The formulation of the agents was polymer 0.6%+high temperature cross-linking agent 0.3%+stabilizer 0.08%+ improver 0.04%. The impact of temperature, salinity and p H value on gelling performance of profile control agents was evaluated. The results showed that the gelation time was shortened, gel viscosity first became larger and then smaller with the increase of temperature; applicable p H value scope of the agents was wide, the gelation time was shorter and gel viscosity was larger when the p H value was 8~10; the gelation time was shortened and gel viscosity was basically unchanged with the increase of concentration of calcium ion. The plugging experiment of the agents indicated that the plugging rate was more than 98%.
Based on the reservoir characteristics in Donghe oilfield including high pressure, high temperature and high salinity of formation water,polymer SD7000 was selected to research and optimize profile control agents. The formulation of the agents was polymer 0.6%+high temperature cross-linking agent 0.3%+stabilizer 0.08%+ improver 0.04%. The impact of temperature, salinity and p H value on gelling performance of profile control agents was evaluated. The results showed that the gelation time was shortened, gel viscosity first became larger and then smaller with the increase of temperature; applicable p H value scope of the agents was wide, the gelation time was shorter and gel viscosity was larger when the p H value was 8~10; the gelation time was shortened and gel viscosity was basically unchanged with the increase of concentration of calcium ion. The plugging experiment of the agents indicated that the plugging rate was more than 98%.
引文
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[3]唐孝芬,刘玉章,向问陶,等.渤海SZ36-1油藏深部调剖剂研究与应用[J].石油勘探与开发,2005,32(6):109-110.
[4]刘琳波,戴彩丽,赵娟,等.影响络合铬冻胶成冻因素研究[J].油田化学,2010,27(2):153-154.
[5]王业飞,熊生春,何英,等.孤岛油田冻胶型深部调剖剂实验研究[J].西安石油大学学报(自然科学版),2006,21(1):47-48.
[6]黎慧,戴彩丽,魏子扬,等.适用于海上油田的耐温抗盐速溶冻胶堵剂的研究[J].石油钻采工艺,2014,36(3):96-97.
[7]杨文军,赵光,刘奎,等.耐温耐盐深部调剖体系研究[J].断块油气田,2011,18(2):258-259.
[8]戴彩丽,赵娟,姜汉桥,等.延缓交联体系深部调剖性能的影响因素[J].中国石油大学学报(自然科学版),2010,34(1):151-152.