考虑井壁摩擦随机性的钻柱动力学模型

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (11) : 252-258.

论文

考虑井壁摩擦随机性的钻柱动力学模型

田家林1，2，杨应林1，杨琳1吴志鑫1，申彤1，李蕾1

作者信息 +

Dynamic model of drill strings considering stochastic frictional effects of well wall

TIAN Jialin1，2， YANG Yinglin1， WU Zhixin1，SHEN Tong1， LI Lei1， YANG Lin1

Author information +

文章历史 +

摘要

针对新型油气资的实际情况，为研究更为复杂地层工作环境下的钻柱动力学特性，文章进行井壁摩擦随机性及其对钻柱动力学的影响研究。首先结合井下实际情况，进行井壁摩擦行为描述，研究构建井壁随机场的步骤与方法。然后基于页岩气工程背景，进行水平井钻柱动力学模型分析，给出模型中各力的求解表达式，以及动力学模型的离散方法。同时，根据实验测试确定算例基本参数，将不同方法得到的结果进行对比分析，验证研究方法的准确性，然后对关键参数特性进行定量分析。文章研究成果可为新型油气资源开采条件下的钻柱动力学研究提供参考，也可为井下安全生产、提速增效方法与工具研究提供理论依据，对指导现场生产具有实际意义。

Abstract

Aiming at the actual situation of new petroleum resources, the friction stochasticity of well wall and its influence on drill string dynamic behavior were investigated here for studying drill-string dynamic characteristics under more complex formation conditions. Firstly, combined with the actual circumstance of oil-gas wells, the friction behavior of borehole wall was described, and the procedure and methods were proposed to build the random field of borehole wall. Then based on the engineering background of shale gas, the drill-string dynamic model in horizontal wells was established. The solving expressions for forces in the model and the model’s discretization method were derived. At the same time, the basic parameters of examples were determined with test data. The results obtained with different methods were compared and analyzed to verify the correctness of the proposed method. Then key parameters of the model were analyzed quantitatively. The study results provided a reference for further studying drill-string dynamic behaviors under new petroleum resources exploitation conditions, and a theoretical guidance for safety production of down hole, the methods to improve rate of penetration (ROP) and efficiency, and tools development. They were valuable for the field production.

导出引用

田家林1,2，杨应林1，杨琳1,吴志鑫1，申彤1，李蕾1. 考虑井壁摩擦随机性的钻柱动力学模型[J]. 振动与冲击, 2018, 37(11): 252-258

TIAN Jialin1，2， YANG Yinglin1， WU Zhixin1，SHEN Tong1， LI Lei1， YANG Lin1. Dynamic model of drill strings considering stochastic frictional effects of well wall[J]. Journal of Vibration and Shock, 2018, 37(11): 252-258

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