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1989 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。
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.
作者
谭雷川
高德利
ADEEB Samer
陶红
陶冶
王正旭
任韶然
庞琬滢
张馨方
TAN Leichuan;GAO Deli;TAO Hong;TAO Ye;WANG Zhengxu;REN Shaoran;PANG Wanying;ZHANG Xinfang(OE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Department of Civil & Environmental Engineering,University of Alberta,Edmonton T6G1H9,Canada;Drilling & Production Technology Research Institute,Chuanqing Drilling Engineering Company Limited,PetroChina,Guanghan 618300,China;Training Center,Chuanqing Drilling Engineering Company Limited,PetroChina,Chengdu 610015,China;School of Petroleum Engineering in China University of Petroleum(East China), Qingdao 266580,China;School of Mining & Petroleum Engineering,University of Alberta,Edmonton T6G1H9,Canada)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第4期69-74,共6页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金项目(U1762214,51521063)
国家科技重大专项(2017ZX05009-003)
国家重点研发计划课题(2016YFC0303303)
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
casing wear prediction
sinusoidal buckled drill string
inversion calculation
prediction accuracy
Fuling shale gas
