王家航;侯晓春;王晓冬;王磊;董文秀;李磊;

• 1:中国地质大学(北京)能源学院

• 2:中国地质大学(北京)能源学院非常规天然气能源地质评价与开发工程北京市重点实验室

摘要(Abstract)：

低渗透储层内考虑启动压力梯度的流体渗流过程中,动边界的传播规律反映储层的动用范围,并影响井底压力动态.建立河道型低渗储层考虑启动压力梯度和存在动边界的有限导流垂直裂缝井双线性流渗流数学模型,通过Laplace变换,得到动边界传播方程和地层流体压力分布方程;在Laplace变换域中,运用牛顿迭代和Stehfest数值反演方法计算获得井底压力分布特征、动边界传播规律及产能动态曲线.结果表明:启动压力梯度越大,动边界传播越慢、压力损失越大、井产量下降越快;定产条件下,裂缝导流能力越大,压力损失越小;裂缝导流能力对动边界传播影响较小;定压条件下,动边界存在最大值.由压力分布特征和动边界范围确定单井最大动用面积,对实际生产具有指导意义.

关键词(KeyWords)：启动压力梯度;动边界;有限导流垂直裂缝;双线性流动;压力分析

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05013-004,2011ZX05009-002)

作者(Author):王家航;侯晓春;王晓冬;王磊;董文秀;李磊;

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