低渗透油田超前注水合理技术参数优化研究
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摘要
X区块FY油层为低渗透油藏,该区块采用超前注水的方法来提高原油采收率,运用数值计算和数值模拟的方法,在历史拟合的基础上对试验区超前注水参数进行了优化研究.对于合理注水强度,设计了5种注水强度方案,通过综合分析不同注入强度达到相同压力水平下的激动半径、储层压力分布和采收率,确定合理注入强度为1.65m~3/d·m;对于合理地层压力保持水平,设计了4种地层压力保持水平方案,并与同步注水进行比较,结果表明,当地层压力保持水平为原始地层压力115%左右时,试验区开发效果最好;对于超前注水合理投产时机,按所优选的注水强度配注各水井水量,设计了4个方案进行不同超前注水时间对比研究,结果表明,超前注水4～6个月,试验区开发效果最好.
FY layer in block X belongs to low permeability reservoir, and the method of advanced injection is applied to improve the oil recovery in block X. For researching the parameter optimization of advanced injection, the study mainly depends on numerical calculation and simulation on the basis of history matching. Five schemes are designed for the study of injection strength, and the reasonable injection strength is confirmed as 1.65 m~3/d m through comprehensive analysis of the flow radius for different injection strength at the same pressure level, the reservoir pressure distribution and oil recovery. Four schemes are designed for the study of pressure maintains, the result show that development effects is the best when pressure maintain is about 115% of the original formation pressure. On the premise that water quantity of each well was distributed according to preferred injection strength, four schemes are designed for the study of injection time, the result show that the reasonable injection time is 4-6 months.
FY layer in block X belongs to low permeability reservoir, and the method of advanced injection is applied to improve the oil recovery in block X. For researching the parameter optimization of advanced injection, the study mainly depends on numerical calculation and simulation on the basis of history matching. Five schemes are designed for the study of injection strength, and the reasonable injection strength is confirmed as 1.65 m~3/d m through comprehensive analysis of the flow radius for different injection strength at the same pressure level, the reservoir pressure distribution and oil recovery. Four schemes are designed for the study of pressure maintains, the result show that development effects is the best when pressure maintain is about 115% of the original formation pressure. On the premise that water quantity of each well was distributed according to preferred injection strength, four schemes are designed for the study of injection time, the result show that the reasonable injection time is 4-6 months.
引文
[1]孙娜.低渗透油藏水驱开发效果综合评价方法研究与应用[J].特种油气藏,2008,15(6):56-58.
[2]罗银富.低渗透砂岩油藏水驱开发效果评价指标与方法研究[D].西南石油学院,2005:50-62.
[3]闫健,张宁生,刘晓娟.低渗透油田超前注水增产机理研究[J].西安石油大学学报,2008,23(5):43-45.
[4]刘泽民.低渗透油藏开发中超前注水技术及应用分析[J].化工中间体,2015,11(04):31.
[5]刘嘉麟.源121-3区块超前注水参数优选研究[D].东北石油大学,2015.
[6]熊伟,雷群,刘先贵,等.低渗透油藏拟启动压力梯度[J].石油勘探与开发,2009,36(2):232-236.
[2]罗银富.低渗透砂岩油藏水驱开发效果评价指标与方法研究[D].西南石油学院,2005:50-62.
[3]闫健,张宁生,刘晓娟.低渗透油田超前注水增产机理研究[J].西安石油大学学报,2008,23(5):43-45.
[4]刘泽民.低渗透油藏开发中超前注水技术及应用分析[J].化工中间体,2015,11(04):31.
[5]刘嘉麟.源121-3区块超前注水参数优选研究[D].东北石油大学,2015.
[6]熊伟,雷群,刘先贵,等.低渗透油藏拟启动压力梯度[J].石油勘探与开发,2009,36(2):232-236.