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Finite element simulation of dynamic fracture in hydraulic fracturing
Author(s): 
Pages: 103-106
Year: Issue:  6
Journal: ACTA PETROLEI SINICA

Keyword:  流固耦合水力压裂裂缝形态动态造缝渗透率渗流速度有限元模拟数学模型;
Abstract: 基于多孔介质流固耦合理论,建立了水力压裂动态造缝有限元模型,对不同裂缝形态的动态造缝进行了有限元模拟.研究结果表明:动态造缝会在井眼周围形成类似于椭圆形分布的致密带.对于楔形缝及椭圆缝来说,随着靠近裂缝尖端造缝宽度的增加,造缝影响区域有所扩大,但总体分布仍类似于椭圆形.在井眼周围5 m以内区域,渗透率受动态造缝影响明显,且距井眼越近,渗透率变化越剧烈;在近井致密带内渗流速度明显降低,且造缝长度越小动态造缝对压裂井产能的影响相对越明显.动态造缝形成的致密带是降低压裂井产能的一个重要因素.
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