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基于钻柱正弦屈曲的套管磨损预测模型
谭雷川1,2,高德利1,ADEEBSamer2,陶红3,陶冶4,王正旭1,任韶然5,庞琬滢6,张馨方6
(1.中国石油大学(北京)石油工程教育部重点实验室,北京 102249;2.阿尔伯塔大学土木与环境工程学院,加拿大埃德蒙顿 T6G1H9;3.中国石油集团川庆钻探工程有限公司钻采工程技术研究院,四川广汉 618300;4.中国石油集团川庆钻探工程有限公司培训中心,四川成都 610015;5.中国石油大学(华东)石油工程学院,山东青岛 266580;6.阿尔伯塔大学采矿与石油工程学院,加拿大埃德蒙顿 T6G1H9)
摘要:
在复杂井况油气勘探开发的钻井过程中,巨大的摩阻扭矩和严重的狗腿度使钻柱和套管不可避免地发生接触,导致严重的套管磨损。基于能量耗散原理和新的复杂几何关系,建立一种考虑钻柱正弦屈曲的套管磨损预测模型,并利用套管磨损因子反演的方法校正并预测具有相似结构和井眼轨迹的井的套管磨损情况。该模型应用于涪陵页岩气套管磨损预测,通过井X1现场井径测试数据对具有相似结构和井眼轨迹的井X2进行磨损预测。结果表明:当测深达到2700 m时,如果不考虑钻柱的正弦屈曲会导致磨损深度预测误差超过23.9%;对于位于1989 m钻柱接头与套管的目标磨损位置,若考虑正弦屈曲情况,实际位于1794 m处,预测误差达到9.8%;忽略钻柱正弦屈曲对套管磨损的影响会导致套管磨损预测不准确。
关键词:  套管磨损预测  正弦屈曲钻柱  反演计算  预测精度  涪陵页岩气
DOI:10.3969/j.issn.1673-5005.2019.04.008
分类号::TE 21
文献标识码:A
基金项目:国家自然科学基金项目(U1762214,3);国家科技重大专项(2017ZX05009-003);国家重点研发计划课题(2016YFC0303303)
Casing wear prediction model in consideration of sinusoidal buckled drill string
TAN Leichuan1,2, GAO Deli1, ADEEB Samer2, TAO Hong3, TAO Ye4, WANG Zhengxu1, REN Shaoran5, PANG Wanying6, ZHANG Xinfang6
(1.MOE Key Laboratory of Petroleum Engineering, China University of Petroleum(Beijing),Beijing 102249, China;2.Department of Civil & Environmental Engineering,University of Alberta, Edmonton T6G1H9, Canada;3.Drilling & Production Technology Research Institute, Chuanqing Drilling Engineering Company Limited, PetroChina, Guanghan 618300, China;4.Training Center, Chuanqing Drilling Engineering Company Limited, PetroChina, Chengdu 610015, China;5.School of Petroleum Engineering in China University of Petroleum(East China), Qingdao 266580, China;6.School of Mining & Petroleum Engineering,University of Alberta, Edmonton T6G1H9, Canada)
Abstract:
During well-drilling process, due to large drag, torque and serious buckling condition, the drill string is inevitably in contact with the casing surface, which can lead to wear of the casing. In this paper, an improved casing wear prediction model in consideration of sinusoidal buckled drill string was developed based on energy dissipation principles and the geometric shape of the buckled pipe. A casing wear factor was introduced in the model, and it can be calibrated using collected parameters from wellbore caliper testing for wells with similar well structure and trajectory. The calibrated model was then applied to the casing wear prediction in Fuling shale gas field, and the prediction results of well X2 through the caliper testing data from a similar well of X1 show that, as the measured well depth to 2700 m, the calculation error of casing wear can be over 23.9% if sinusoidal buckling is not considered. Besides, the predicted location that serious wear may occur was of 1989 m using a previously proposed steady state model, but it is of 1794 m with the new model prediction, and the error is 9.8%. The results indicate that the previous models might be inaccurate in predicting the casing wear.
Key words:  casing wear prediction  sinusoidal buckled drill string  inversion calculation  prediction accuracy  Fuling shale gas
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