塑性砂岩水力压裂裂缝扩展研究
首发时间:2020-10-30
摘要:水力压裂是一种重要的人工提升渗透率的方法,在非常规油气开发等地下工程有着十分广泛的应用。本文引入了塑性系数表征岩石塑性,通过螺旋射孔布孔方式研究塑性系数变化对人工模拟的天然致密砂砾岩岩心水力压裂的裂缝起裂应力,裂缝延展形态以及裂缝几何参数特征的影响来揭示非均质致密砂砾岩射孔水压致裂裂缝的扩展机理。
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Study on fracture propagation in hydraulic fracturing of plastic sandstone
Abstract:Hydraulic fracturing is an important artificial permeability improvement method and has been widely used in underground engineering such as unconventional oil and gas development.This article introduces the plastic coefficient of characterization of rock plastic, through the study on spiral perforating holes plastic coefficient change on artificial simulation of the natural density glutenite core hydraulic fracturing cracks crack stress, crack extension pattern and the characteristics of fracture geometry parameter to reveal the influence of heterogeneous density glutenite perforating the extension mechanism of hydraulic fracturing cracks.
Keywords: Hydraulic fracturing plasticity coefficient initiation stress crack propagation
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