裸眼系列完井方式下辐射状多分支井产能研究

发布时间：2018-03-03 17:28

本文选题：辐射状多分支井　切入点：耦合模型　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：辐射状多分支水平井(简称辐射状多分支井)在开发多个小块状或透镜体油气藏、薄油气藏以及低压低渗、高黏度稠油藏时能够提高单井的产能。与常规水平井相比,其不仅能提高最终的采收率还能节约投资成本,其对于今后该类油气藏的开发具有重要的指导意义。在前人的工作基础上,本文针对裸眼系列完井方式下辐射状多分支井的产能模型进行了研究,取得的主要进展及研究成果如下： (1)考虑渗流干扰、井筒管流压降、钻完井污染等因素,借助相关渗流力学理论、工程流体力学理论、油藏工程理论和数值分析理论,运用离散化方法,建立新的稳态耦合产能模型。 (2)与传统的模型相比,该模型的优点为：考虑了钻完井污染以及完井方式对辐射状多分支井产能的影响；可对薄层油气藏进行模拟,并且分析了辐射状多分支井的产能影响因素。 (3)制定了稳态耦合模型的循环迭代求解方案,并且编制了《薄层辐射状多分支井产能计算分析程序》,将现场实例代入程序计算得到了各分支井筒的径向流率、轴向流量以及井筒流压数据,绘制了相应的数据分布规律图。 (4)对数据分布规律图进行分析,其结果表明,渗流干扰作用对油藏渗流的影响很大,井筒摩阻会消耗部分生产压差造成产能降低。所得的规律对辐射状多分支井的钻完井工艺具有实际指导意义。 (5)以上述计算结果为基础,将本文模型计算所得的产能与传统的经验公式计算所得产能进行对比,其结果进一步验证了本文所建立产能模型的正确性。
[Abstract]:Radial multi-branch horizontal wells can improve the productivity of single wells in the development of multiple small block or lens reservoirs, thin reservoirs, low pressure and low permeability, and high viscosity heavy oil reservoirs. It can not only improve the final recovery factor but also save the investment cost. It has important guiding significance for the development of this kind of oil and gas reservoir in the future. In this paper, the productivity model of radial multi-branched wells under open-hole completion mode is studied. The main progress and research results are as follows:. 1) considering the factors of seepage interference, wellbore pressure drop, well completion pollution and so on, the discretization method is used with the aid of relevant percolation mechanics theory, engineering fluid mechanics theory, reservoir engineering theory and numerical analysis theory. A new steady-state coupling productivity model is established. Compared with the traditional model, this model has the advantages of considering the effects of drilling and completion pollution and completion mode on the productivity of radiative multi-branched wells, and can be used to simulate thin layer oil and gas reservoirs. The factors affecting productivity of radial multi-branch wells are analyzed. In this paper, the cyclic iterative solution of the steady-state coupling model is worked out, and the program for calculating the productivity of thin-layer radiating multi-branched wells is developed. The radial flow rate of each branch wellbore is calculated by using the field example instead of the program. The data of axial flow rate and wellbore flow pressure are plotted. 4) the data distribution pattern is analyzed. The results show that percolation interference has a great influence on reservoir percolation. The friction of wellbore will consume part of the production pressure difference and reduce the productivity. The obtained rule is of practical significance to the drilling and completion process of the radial multi-branch well. 5) on the basis of the above calculation results, the productivity calculated by the model is compared with that calculated by the traditional empirical formula. The results further verify the correctness of the productivity model established in this paper.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE328

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