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首页> 外文期刊>Journal of natural gas science and engineering >Modeling and simulation of complex fracture network propagation with SRV fracturing in unconventional shale reservoirs
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Modeling and simulation of complex fracture network propagation with SRV fracturing in unconventional shale reservoirs

机译：非常规页岩储层SRV压裂复杂裂隙网络扩展的建模与模拟

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摘要

Multiple hydraulic fractures in naturally fractured unconventional shale reservoirs have often induced complicated fracture network expansion, as revealed by micro-seismic fracture mapping. As productivity of conventional energy resources decreases and the proportion of reserves in unconventional oil/gas increases, the theoretical method about the modeling and simulation of complex fracture network propagation needs to be improved to innovate stimulated reservoir volume (SRV) fracturing technology. To simulate the fracture network growth, a new model based on the modified displacement discontinuity method (MDDM) coupling pseudo-3D fracture propagation model is proposed introducing the propagation pattern and criterion. The numerical result of this model is solved and the process of fracture network propagation is simulated in different natural fracture (NF) distribution and fracturing parameters. The effects of NF distribution, hydraulic fracture (HF) spacing, bottomhole pressure and segmented and multi-cluster fracturing mode on the fracture network propagation are discussed. The simulation results of complex fracture network are characterized by four parameters as well. The results show that there are reasonable fracturing parameters technically during the SRV fracturing in unconventional shale reservoirs. It is significant to reasonably and efficiently develop the unconventional shale resources by researching the fracture network propagation rules. (C) 2015 Elsevier B.V. All rights reserved.
机译：如微地震裂缝图所示，天然裂缝的非常规页岩储层中的多次水力压裂常常引起复杂的裂缝网络扩展。随着常规能源生产率的下降和非常规油气储量的增加，复杂裂隙网络扩展的建模和模拟理论方法需要改进，以创新增产油藏压裂技术。为了模拟裂缝网络的增长，提出了一种基于改进的位移不连续方法（MDDM）耦合伪3D裂缝扩展模型的新模型，并介绍了扩展模式和判据。求解了该模型的数值结果，并模拟了不同自然裂缝（NF）分布和压裂参数下裂缝网络的传播过程。讨论了NF分布，水力压裂（HF）间距，井底压力以及分段和多簇压裂模式对裂缝网络扩展的影响。复杂裂缝网络的仿真结果也具有四个参数。结果表明，非常规页岩储层在SRV压裂过程中在技术上存在合理的压裂参数。通过研究裂缝网络的传播规律，合理有效地开发非常规页岩资源具有重要意义。 （C）2015 Elsevier B.V.保留所有权利。

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