基于赫-巴模型的微小井眼连续油管钻井环空流阻计算分析  

Calculation and Analysis of Drilling Annulus Flow Resistance in Coiled-Tubing for Slim-Hole Drilling Based on the Herschel-Buckley Model

作　　者：侯学军[1,2] 宋洪奇 关谦 金锐 张辉 Hou Xuejun;Song Hongqi;Guan Qian;Jin Rui;Zhang Hui(Chongqing University of Science and Technology,Chongqing 401331,China;Shaanxi Unconventional Oil and Gas Exploration and Development Collaborative Innovation Center(Xi'an Shiyou University),Xi’an,Shaanxi 710065,China;CNPC Greatwall Drilling Company,Panjin,Liaoning 124010,China;China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]重庆科技学院,重庆401331 [2]陕西省非常规油气勘探开发协同创新中心(西安石油大学),陕西西安710065 [3]中国石油长城钻探工程有限公司,辽宁盘锦124010 [4]中国石油大学(北京),北京102249

出　　处：《特种油气藏》2019年第4期148-153,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“连续管小井眼钻井牵引控制系统关键技术”(2017ZX05009003-007);国家自然科学基金面上项目“深井、超深井射孔管串动态响应机理与安全性评估研究”(51774063);重庆市社会事业与民生保障科技创新专项“柴油机废气废热回收循环钻井及污染处理综合利用技术研究”(cstc2017shmsA90004);重庆市基础研究与前沿探索项目“页岩气微小井眼连续油管钻井液循环流阻计算模型与控制机理研究”(cstc2018jcyjAX0593);陕西省非常规油气勘探开发协同创新中心(西安石油大学)开放基金资助项目“非常规油气微小井眼CT钻井关键技术研究”

摘　　要：微小井眼连续油管(简称CT)钻井井眼直径小,井眼环空中钻井液流阻较大,严重制约微小井眼CT钻井的推广应用,根据微小井眼CT钻井特点,运用非牛顿的赫-巴流体循环流阻计算模型,分别计算不同外径、不同长度的CT在不同偏心度情况下钻Φ89.0 mm井眼时的环空流阻,研究微小井眼CT钻井环空流阻随CT外径、长度、井眼偏心度、流速等参数的变化规律。结果表明:使用外径为25.4~73.0 mm的CT钻井,推荐CT环空钻井液流速为0.54~3.10 m/s。该研究可解决微小井眼CT钻井循环流阻较大的问题,推动微小井眼CT钻井技术的应用与发展。The slim-hole coiled-tubing(referred to as CT)drilling technology is characterized by small bore-hole diameter and relatively huge annular drilling fluid flow resistance,which seriously limits the popularization and application of slim-hole CT drilling.According to the slim-hole CT drilling performances,the non-Newtonian Herschel-Buckley fluid circulation resistance calculation model was used to calculate the annular flow resistance under different outer diameters,CT lengths and eccentricities when the slim-hole diameter isΦ89.0 mm.The effects of multiple factors on the bore-hole circulation resistance in the slim-hole CT drilling were researches,including CT outer diameter,CT length,bore-hole eccentricity,flow rate,etc.Result indicates that the annular drilling fluid flow rate is recommended as 0.54~3.10 m/s when the CT outer diameter is 25.4~73.0 mm during slim-hole CT drilling operation.This research could improve the relatively huge circulation flow resistance and promote the application and development of slim-hole CT drilling.

关 键 词：微小井眼钻井 连续油管 井眼环空 循环流阻 赫-巴模型 

分 类 号：TE246[石油与天然气工程—油气井工程]