摘要
为分析分形油藏渗流机理,基于分段压裂水平井渗流特征,建立了分形油藏分段压裂水平井试井解释模型,应用Laplace变换和Stehfest数值反演求得了定产条件下不同边界类型分形油藏分段压裂水平井井底压力半解析解.结合某油藏储层特征参数对分形油藏流体流动形态进行划分并研究了天然多孔介质自相似参数对井底流体流动形态的影响.研究结果表明:分形油藏分段压裂水平井井底主要存在井筒存储、过渡流、拟线性流、拟双线性流、边界影响流等五个流动阶段,天然多孔介质自相似性的不规则程度对流动形态影响较大,多孔介质中传导率异常影响相对较小.
In order to analyze flow mechanism in fractal reservoir and based on flow characteristics of fractal reservoir, this paper established well-testing model of fractured horizontal well in fractal reservoir, applied Laplace transform and Stehfest numerical inversion, and obtained the formulas of bottom hole pressure under the constant output for the single fracture in differen!- reservoir boundary. On the basis of model validation, this paper divided flow patterns on different kinds of outer boundary of fractal reservoir and researched the influence of fractal parameters on bottom hole pressure. It is shown that there mainly exists wellbore storage, transition flow, pseudo-linear flow, pseudo-bilinear flow and boundary flow and at the same time fractals dimensions has a great influence on the bottom hole pressure.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2014年第9期1200-1205,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家重点基础研究发展计划(973)资助项目(2014CB239103)
中央高校基本科研业务费专项资金资助项目(13CX06030A)
长江学者和创新团队发展计划基金资助项目(IRT1294)
关键词
分形油藏
分段压裂水平井
多孔介质
质量维数
分形指数
压力动态
fractal reservoir
multiply-fractured horizontal
porous medium
fractal dimension
fractalindex
pressure characteristic
