随钻扩眼钻具组合与钻井参数优化研究  

Study on Bottom Hole Assembly and Drilling Parameter Optimization for Reaming While Drilling

作　　者：张佳伟 纪国栋 郭卫红 汪海阁 崔猛 惠城 Zhang Jiawei;Ji Guodong;Guo Weihong;Wang Haigei;Cui Meng;Hui Cheng(CNPC Engineering Technology R&D Company Limited;China University of Petroleum(Beijing))

机构地区：[1]中国石油集团工程技术研究院有限公司 [2]中国石油大学(北京)

出　　处：《石油机械》2021年第2期22-27,共6页China Petroleum Machinery

基　　金：国家科技重大专项“页岩气三维丛式水平井优快钻井技术试验与应用”(2016ZX05062-003);中国石油天然气集团有限公司重大科技专项“重大工程关键技术装备研究与应用(二期)”(2018E-21);中国石油天然气集团有限公司重大现场试验项目“膨胀管裸眼封堵技术与装备现场试验”(2017F-19)。

摘　　要：鉴于国内现有随钻扩眼系统钻具组合与钻井参数优化研究缺乏,同时考虑领眼钻头及扩眼器几何结构、地层岩石强度及钻井参数等3种影响因素的计算模型少有报道,以及扩眼系统扭矩分配比计算方法缺失等现状,通过建立模型分析了领眼钻头钻压和扭矩分配比随钻具组合、钻柱转速及地层强度的变化规律,进行了钻前不同扩眼钻具组合对比与优选以及随转扩眼钻进实例分析。基于破岩机械比能、切削深度以及切削工具摩擦因数计算模型,提出扩眼系统有效切削面积及有效切削半径概念,形成了随钻扩眼过程中领眼钻头钻压和扭矩分配比计算模型;提出了随钻扩眼系统钻井参数优化流程,建立了随钻扩眼系统输出钻压和扭矩计算模型。研究结果可以为随钻扩眼过程中钻井参数优化及自动化钻井提供理论支撑。Domestic studies on bottom hole assembly(BHA)and drilling parameter optimization for reaming while drilling(RWD)are lack of the calculation model which considers three influence factors(i.e.,geometric configuration of pilot bit and reamer,formation rock strength and drilling parameter)and the method for calculating the torque distribution ratio of reaming system.In this paper,a model is established to analyze the variation laws of weight on bit(WOB)and torque distribution ratio of pilot bit with BHA,WOB,rotation speed and formation strength.In addition,different reaming BHAs are compared and selected before the drilling and RWD case is analyzed.The results show the model for calculating the WOB and torque distribution ratio of pilot bit in the process of RWD is developed based on the model for calculating rock breaking mechanical energy,cutting depth and friction coefficient of cutting tool.What’s more,the optimization process of drilling parameters of RWD system is put forward,and the model for calculating the output WOB and torque of RWD system is established.The research conclusions can provide the theoretical support for drilling parameter optimization and automatic drilling in the process of RWD.

关 键 词：随钻扩眼 钻具组合 参数优化 计算模型 分配比 输出钻压 输出扭矩 

分 类 号：TE921[石油与天然气工程—石油机械设备]