A Quantitative Investigation of the Fracture Pump-ln/Flowback Test
A Quantitative Investigation of the Fracture Pump-ln/Flowback Test
复制标题
压裂泵入/返排试验的定量研究
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
S. Miska
中科院分区：
文献类型：
--
作者：
S. V. Plahn;K. Nolte;S. Miska
裂缝闭合压力是裂缝处理设计和评价的重要参数。泵入/返排（PIFB）测试经常用于估计其大小。该测试是有吸引力的，因为在返排过程中井底压力形成了一个独特的和可重复的签名。这与泵入/关井测试形成对比，在泵入/关井测试中很少看到裂缝闭合的强烈迹象。存在用于从回流压力响应提取闭合压力的各种技术。不幸的是，这些程序给出了不同的关闭压力的估计和他们的理论基础没有很好地建立。我们目前的结果，PIFB测试的一个更坚实的基础。数值模型被用来模拟PIFB测试和收集的物理机制，有助于响应。基于我们的模拟结果，我们提出了一个解释程序，它提供了更好的估计关闭压力比现有的技术。
Fracture closure pressure is an important parameter for fracture treatment design and evaluation. The pump-in/flowback (PIFB) test is frequently used to estimate its magnitude. The test is attractive because bottomhole pressures during flowback develop a distinct and repeatable signature. This is in contrast to the pump-in/shut-in test where strong indications of fracture closure are rarely seen. Various techniques exist for extracting closure pressure from the flowback pressure response. Unfortunately, these procedures give different estimates for closure pressure and their theoretical bases are not well established. We present results that place the PIFB test on a more solid foundation. A numerical model is used to simulate the PIFB test and glean physical mechanisms contributing to the response. Based on our simulation results, we propose an interpretation procedure which gives better estimates for closure pressure than existing techniques.