不同下套管工艺套管受力及摩阻扭矩预测模型  

Prediction Models for Stress and Torque of Casing under Different Running Processes

作　　者：张楠 徐国民 宋立舟 罗江浩 曹婧 韩礼红 王建军 ZHANG Nan;XU Guomin;SONG Lizhou;LUO Jianghao;CAO Jing;HAN Lihong;WANG Jianjun(Daqing Oil Field Production Technology Institute,Daqing,Heilongjiang 163453,China;State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China)

机构地区：[1]中国石油大庆油田有限责任公司采油工艺研究院,黑龙江大庆163453 [2]中国石油集团工程材料研究院有限公司,油气钻采输送装备全国重点实验室,陕西西安710077

出　　处：《石油管材与仪器》2024年第4期36-41,I0002,共7页Petroleum Tubular Goods & Instruments

基　　金：黑龙江省揭榜挂帅科技项目“古龙页岩油增产改造关键技术研究”(编号:2021ZZ10-04)。

摘　　要：针对深层油气田开采中水平井位移大、摩阻扭矩大,井眼轨迹及套管柱受力情况复杂的问题,建立理论模型对长水平井下套管摩阻、屈曲进行分析是非常有必要的。利用样条插值函数对测斜数据进行拟合,对套管柱的受力情况进行分析,优选了常规、旋转和漂浮下套管方式下的三维摩阻扭矩模型,并且分析了钻井液浮力的影响及管柱屈曲对套管柱摩阻计算的影响。大钩载荷、摩阻、最大侧向力模型与软件计算结果准确率达到90%以上,验证了模型的准确性。In view of the problems of large displacement and frictional torque of horizontal wells and complexity of wellbore trajectory and stress distribution of casing string in deep oil and gas field exploitation,it is necessary to establish a theoretical model to analyze the friction and buckling of casing in long horizontal downholes.In this paper,the spline interpolation function is used to fit the inclination data,the force of the casing string is analyzed,and the three-dimensional frictional torque models of the casing under conventional,rotating and floating casing modes are established.Additionally,the influence of the buoyancy of drilling fluid and the string buckling on the calculation of casing friction are considered.The consistancy between the results of the large hook load,friction and maximum lateral force model and software calculation results reaches more than 90%,which verifies the accuracy of the models.

关 键 词：页岩油气 下套管工艺 摩阻 扭矩 屈曲 

分 类 号：TE329[石油与天然气工程—油气田开发工程]