期刊文献+

数值试井时间步长控制算法

Time Step Control Algorithm of Numerical Well Test
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摘要 由于数值试井要进行关井压力恢复数据与压力导数拟合,因而计算稳定是商业化数值试井软件的基本要求之一。通过渗流方程的稳定性分析、每个时间步下压力、饱和度等变化的最大值,给出了时间步长的自动控制算法。由于要模拟瞬态压力,井周围要使用小网格,使得计算时间步长小,数值模拟时间增加,增大压力拟合难度。对于较为复杂的多井、多相流情形,尤其可能发生过泡点的油气两相或油气水三相情形,时间步长就会更小,建议使用peaceman井模型提高计算速度。对简单问题,可使用内边界井模型进行计算。 The numerical well test need to fit pressure recovery data and pressure derivative.Therefore it is important to guarantee stability for the commercial numerical well test software.Based on the stability analysis,maximum and minimum time step,maximum variation of pressure and saturation during a time step,a time step control method is proposed.
出处 《油气井测试》 2013年第1期17-19,75-76,共3页 Well Testing
基金 国家重大基础研究973项目(2011CB707305) 国家自然科学基金(10932010) 中央高校基本科研业务费专项资金资助 国家科技重大专项(2011ZX05009-006)
关键词 时间步长 稳定性 数值试井 PEBI网格 time step,stability,numerical well test,PEBI grid
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参考文献5

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