陈志明, 赵鹏飞, 曹耐, 廖新维, 王佳楠, 刘辉. 页岩油藏压裂水平井压–闷–采参数优化研究[J]. 石油钻探技术, 2022, 50(2): 30-37. DOI: 10.11911/syztjs.2022005
引用本文: 陈志明, 赵鹏飞, 曹耐, 廖新维, 王佳楠, 刘辉. 页岩油藏压裂水平井压–闷–采参数优化研究[J]. 石油钻探技术, 2022, 50(2): 30-37. DOI: 10.11911/syztjs.2022005
CHEN Zhiming, ZHAO Pengfei, CAO Nai, LIAO Xinwei, WANG Jianan, LIU Hui. Fracturing Parameters Optimization of Horizontal Wells in Shale Reservoirsduring "Well Fracturing-Soaking-Producing"[J]. Petroleum Drilling Techniques, 2022, 50(2): 30-37. DOI: 10.11911/syztjs.2022005
Citation: CHEN Zhiming, ZHAO Pengfei, CAO Nai, LIAO Xinwei, WANG Jianan, LIU Hui. Fracturing Parameters Optimization of Horizontal Wells in Shale Reservoirsduring "Well Fracturing-Soaking-Producing"[J]. Petroleum Drilling Techniques, 2022, 50(2): 30-37. DOI: 10.11911/syztjs.2022005

页岩油藏压裂水平井压–闷–采参数优化研究

Fracturing Parameters Optimization of Horizontal Wells in Shale Reservoirsduring "Well Fracturing-Soaking-Producing"

  • 摘要: 目前在页岩油藏的多段压裂水平井压–闷–采过程中,缺乏系统完善的水平井压裂参数优化方法,为此,基于动态反演理论,建立了压裂参数优化方法。首先,根据页岩油藏压裂后形成的复杂缝网,采用数值理论和离散裂缝方法,建立了考虑页岩油储层特征和复杂天然裂缝的多段压裂水平井数值模型(EDFM-NM),得到了含离散天然裂缝的油藏压力解及多段压裂水平井的井底压力数值解;然后,应用动态分析方法,建立了包括段间距、闷井时间和井距的优化方法。应用建立的优化方法对长庆页岩油XC井进行实例分析,结果表明,实例井合理段间距为100~125 m,合理闷井时间为25~35 d,合理井距为590~610 m。研究结果为长庆油田页岩油藏压–闷–采参数优化提供了理论基础。

     

    Abstract: Regarding the absence of a systemic and complete method for optimizing the multi-stage fracturing parameters of horizontal wells in shale reservoirs during well fracturing-soaking-producing, a fracturing parameter optimization method was developed based on the dynamic inversion theory. First, a numerical model (EDFM-NM) for horizontal wells was established depending on the complex induced fracture networks formed in hydraulic fracturing of shale oil reservoirs, which takes into consideration the characteristics of the reservoirs as well as complex natural fractures. With the model, solution for the pressure of reservoirs with discrete natural fractures and numerical solution of bottom hole pressure of horizontal wells after multi-stage fracturing were obtained. Second, approaches for optimization of stage spacing, soaking time, and well spacing were proposed utilizing the dynamic analysis. Finally, the optimization method was applied to shale oil Well XC in Changqing Oilfield. Reasonable stage spacing, soaking time, and well spacing were found to be 100−125 m, 25−35 d, and 590−610 m, respectively. The research results can provide a theoretical basis for the optimization of fracturing parameters during “well fracturing–soaking–producing” of shale reservoirs in Changqing Oilfield.

     

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