不同类型射孔弹适应性评价及参数优化研究

发布时间：2018-06-29 15:45

本文选题：射孔伤害机理 + 非达西渗流　；参考：《东北石油大学》2017年硕士论文

【摘要】：本研究针对射孔完井井筒附近非达西复杂流动特征和聚合物驱非牛顿流体特性,分析了钻完井过程中储层伤害机理、自主设计并开展了射孔伤害参数测定实验、数值模拟研究了聚合物驱射孔完井井筒附近复杂非牛顿非达西流动规律、针对水驱开发和聚合物驱开发特征评价了不同类型射孔弹适用条件并进行了现场验证。本文主要开展了以下三方面工作:(1)分析了钻井过程中储层污染机理和射孔压实伤害机理。基于泥饼沉降守恒方程、冲蚀方程和达西方程建立了钻井污染深度和污染程度预测模型,并针对目标区块污染深度和污染程度进行预测。自主设计并开展了射孔伤害参数测定实验,实验结果表明:渗透率小于1×10-3μm2条件下射孔压实厚度在10-12mm之间,渗透率大于10×10-3μm2条件下射孔压实厚度在10-18mm之间。(2)建立了射孔完井井筒附近非牛顿非达西渗流模型,设计并开展了聚合物溶液在多孔介质中的流动粘度测定实验。实验结果表明:流动粘度随聚合物分子量和岩心渗透率的增加而增大;聚合物溶液在岩心中的流动粘度远小于溶液表观粘度,按照表观粘度计算聚合物在油藏中的压降会产生较大误差,因此在实际生产过程中计算油藏压降时应采用聚合物溶液真实流动粘度。本实验测定聚合物溶液流动粘度为聚合物驱数值模拟计算提供了科学依据。(3)基于射孔完井井筒附近非牛顿非达西渗流模型和聚合物溶液在多孔介质中的流动粘度测定结果,数值模拟研究了水驱开发和聚合物驱开发条件下不同类型射孔弹完井的流动效率,给出了水驱开发和聚合物驱开发条件下射孔弹效果排序:水驱开发条件下深穿透(穿深639mm)射孔弹效果最好、常规射孔弹次之、大孔径(孔径16mm)射孔弹效果最差,聚驱开发条件下大孔径射孔弹效果优于常规射孔弹,但还是深穿透弹最好。本文研究成果丰富了聚合物驱射孔弹优选及射孔参数优化设计理论,对聚合物驱或三元复合驱射孔完井现场施工设计具有重要工程指导意义。
[Abstract]:According to the complex flow characteristics of non-Darcy and non-Newtonian fluid characteristics of polymer flooding near perforated completion wellbore, the damage mechanism of reservoir during drilling and completion is analyzed, and the experiment of measurement of perforating damage parameters is designed and carried out independently. The complex non-Newtonian non-Darcy flow law near the well bore of polymer flooding perforation and completion is studied numerically. According to the characteristics of water flooding and polymer flooding, the suitable conditions of different types of perforating bullets are evaluated and verified in the field. The main work of this paper is as follows: (1) the mechanism of reservoir pollution and perforation compaction damage during drilling is analyzed. Based on the conservation equation of mud cake settlement, erosion equation and Darcy equation, the prediction model of drilling pollution depth and pollution degree is established, and the pollution depth and pollution degree of target block are predicted. The experiment of perforating damage parameters was designed and carried out. The experimental results show that the perforation compaction thickness is between 10-12mm when the permeability is less than 1 脳 10 ~ (-3) 渭 m ~ (2). The perforation compaction thickness is between 10 脳 10 ~ (-3) 渭 m ~ 2 and 10 脳 10 ~ (-3) 渭 m ~ (2). (2) the non-Newtonian non-Darcy percolation model near the perforating completion wellbore is established, and the flow viscosity measurement experiment of polymer solution in porous media is designed and carried out. The experimental results show that the flow viscosity increases with the increase of polymer molecular weight and core permeability, and the flow viscosity of polymer solution in the core is much smaller than the apparent viscosity of the solution. The calculation of the pressure drop of polymer in the reservoir according to the apparent viscosity will result in a big error, so the real flow viscosity of polymer solution should be used in the calculation of the pressure drop of the reservoir in the actual production process. The experimental measurement of flow viscosity of polymer solution provides a scientific basis for the numerical simulation of polymer flooding. (3) based on the non-Newtonian non-Darcy percolation model near the perforated completion well and the measurement results of the flow viscosity of polymer solution in porous media, The flow efficiency of different types of perforating projectile completion under the conditions of water drive development and polymer flooding development is studied numerically. The order of perforating projectile effect under water drive development and polymer flooding development is given. Under water drive development condition, deep penetration (639mm) perforator is the best, conventional perforator is the second, and large aperture (16mm) perforator is the worst. Under the condition of polymer flooding, the effect of large aperture projectile is better than that of conventional projectile, but it is the best in deep penetrating projectile. The research results in this paper enrich the theory of optimization of perforation elasticity and perforation parameters of polymer flooding, and have important engineering guidance significance for the field design of perforation completion in polymer flooding or ASP flooding.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE257.1

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