多段压裂水平井不均匀产油试井模型

发布时间：2018-03-02 13:52

本文选题：水平井　切入点：不均匀产油　出处：《中国石油大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：针对某条或多条裂缝产油量较小或不产油这一问题,运用Green函数、Newman乘积方法和叠加原理,建立多段压裂水平井不均匀产油试井模型,将裂缝内流动划分为远离井筒的变质量线性流和靠近井筒的径向流表征裂缝有限导流,利用Stehfest数值反演得到考虑井筒存储和表皮效应的实空间井底压力解,绘制典型图版,并分析不均匀产油和裂缝参数对井底压力的影响。结果表明:多段压裂水平井均匀产油和不均匀产油的压力和压力导数特征差异明显;两端裂缝产油量越大,压裂裂缝间距越大,裂缝半长越小,裂缝呈纺锤形分布时,缝间干扰越小,早期径向流越明显,在系统拟径向流之前出现一个新平台。与试井软件Saphir中的经典多级压裂水平井数值模型对比,结果证明了提出的模型的正确性。
[Abstract]:In order to solve the problem of low or no oil production in one or more fractures, the Green function Newman product method and the superposition principle are used to establish a well test model for uneven production of multi-section fracturing horizontal wells. The flow in fracture is divided into variable mass linear flow away from wellbore and radial flow near wellbore to characterize the finite conductivity of fracture. By using Stehfest numerical inversion, a real space bottom hole pressure solution considering wellbore storage and skin effect is obtained, and a typical chart is drawn. The effect of non-uniform oil production and fracture parameters on bottom hole pressure is analyzed. The results show that the difference of pressure and pressure derivative between uniform and non-uniform oil production in multistage fracturing horizontal wells is obvious, and the higher the oil production at both ends of fractures is, The larger the fracture spacing is, the smaller the fracture half length is, and the smaller the interfracture interference is, the more obvious the radial flow is in the early stage when the fracture is distributed in the shape of spindles. A new platform appeared before the quasi-radial flow of the system, and compared with the classical multistage fracturing horizontal well numerical model in Saphir software, the results show that the proposed model is correct.
【作者单位】：中国石油大学油气资源与工程国家重点实验室;中国石油大学石油工程教育部重点实验室;中海油能源发展股份有限公司工程技术深圳分公司;
【基金】：国家科技重大专项(2016ZX05009-004,2016ZX05013001-005)
【分类号】：TE353

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