Analysis of Production Data from Communicating Multifractured Horizontal Wells Using the Dynamic Drainage Area Concept
Analysis of Production Data from Communicating Multifractured Horizontal Wells Using the Dynamic Drainage Area Concept
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DOI：
10.2118/199987-pa
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发表时间：
2021-08-01
影响因子：
2.1
通讯作者：
Behmanesh, Hamid
中科院分区：
文献类型：
--
作者：
Ahmadi, Hossein;Clarkson, Christopher R.;Behmanesh, Hamid
减少裂缝/井间距和增加水力压裂增产处理规模是提高多裂缝水平威尔斯井（MFHW）油气采收率的常用策略。然而，这些策略也会增加裂缝干扰的机会，这不仅会对整体生产产生负面影响，而且还会给生产数据分析带来复杂性。因此，开发了一个半分析模型，分析生产数据从两个通信MFHWs和应用到fieldcase.The新的半分析模型使用动态排水面积（DDA）的概念，并假设三个孔隙度区域。三区模型由一个主水力裂缝（PHF），一个增强压裂区（EFR）邻近的PHF，和一个非刺激区（NSR）。假设井对主要通过PHF连通，则用于两个连通威尔斯的方程被耦合并同时求解以模拟威尔斯之间的流体传递。该方法在历史匹配框架内使用，以通过匹配生产数据来估计威尔斯之间的连通性。首先，针对一系列裂缝/储层性质的更严格的全数值模拟模型来验证半分析模型。这些比较表明，有很好的协议之间的完全数值模拟模型的结果和新的半解析model.The半解析模型，然后匹配历史生产数据从六个MFHWs（从两个相邻的井场钻探）表现出不同程度的沟通。为了满足历史拟合的要求，三区模型只考虑了威尔斯井对间的强连通（井对内连通），计算结果与现场资料吻合较好，首次建立了一个灵活、简单的半解析模型，能够准确地模拟多井对间的连通。该方法可用于油藏工程师分析来自通信MFHW的生产数据。
Reduction of fracture/well spacing and increases in hydraulic fracture stimulation treatment size are popular strategies for improving hydrocarbon recovery from multifractured horizontal wells (MFHWs). However, these strategies can also increase the chance of fracture interference, which can not only negatively impact the overall production but also introduce complexities for production data analysis. A semianalytical model is therefore developed to analyze production data from two communicating MFHWs and applied to a field case.The new semianalytical model uses the dynamic drainage area (DDA) concept and assumes three porosity regions. The three-region model is comprised of a primary hydraulic fracture (PHF), an enhanced fractured region (EFR) adjacent to the PHF, and a nonstimulated region (NSR). Assuming a well pair primarily communicates through PHFs, the equations for two communicating wells are coupled and solved simultaneously to model the fluid transfer between the wells. This method is used within a history-matching framework to estimate the communication between the wells by matching the production data.The semianalytical model is first verified against a more rigorous, fully numerical simulation model for a range of fracture/reservoir properties. These comparisons demonstrate that there is excellent agreement between the fully numerical simulation model results and the new semianalytical model.The semianalytical model is then employed to history-match production data from six MFHWs (drilled from two adjacent well pads) exhibiting different degrees of communication. For the purpose of history matching the data, only strong communication between pairs of wells (intrapair communication) is considered in the three-region model, and the results show good agreement with the field data.A flexible, yet simple, semianalytical model is developed for the first time that can accurately model the communication between multiple well pairs. This approach can be used by reservoir engineers to analyze the production data from communicating MFHWs.