钻头机械能对深水钻井井筒温度场的影响分析  

The effect of the mechanical energy of the drill bit on the temperature field in deep-water borehole

作　　者：崔猛[1,2] 翟应虎[1] 于洋 翟小强 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室 [2]中国石油集团钻井工程技术研究院

出　　处：《石油机械》2010年第11期23-27,5-6,共5页China Petroleum Machinery

基　　金：国家“863”计划项目“深水钻井井控技术”(2006AA09A106)的部分内容

摘　　要：从影响深水钻井井筒温度分布的因素出发,在常规钻井井筒温度计算理论和模型的基础上,应用能量守恒方法,建立了深水钻井井筒温度预测模型,综合考虑了钻头机械能破岩生热、钻井液循环摩阻生热等诸多热源对钻井液温度场的影响。结果表明,钻头机械能在破岩过程中产生的热量流入地层岩石,钻井液在井底携岩过程中温度产生了瞬时波动,温度波动范围为2～4℃,钻头机械能是研究深水钻井井筒温度场不可忽略的一部分。所建模型的求解结果与实测结果相比,最大误差小于5%,证明该模型具有较高的精度。Starting from the factors affecting the temperature distribution of the deep-water borehole,the energy conservation method was applied to establish a model to predict the deep-water drilling borehole on the basis of the theory and model to calculate the normal drilling borehole temperature.A comprehensive consideration was conducted of the effect of several heat sources on the drilling fluid temperature field,such as the heat production by the rock breaking by the drill bit and by the circulation friction of the drilling fluid.The result shows that the heat produced by the mechanical energy of the bit in the process of breaking rocks flew into the rocks of the formation.There appeared the transient surge of the temperature of the drilling fluid in the process of carrying cuttings at the well bottom,with a temperature fluctuation range of 2 to 4℃.The mechanical energy of the bit is a significant part in the study of the temperature of the deep-water drilling borehole.Compared with the actually measured result,the solution of the established model has the maximum error of less than 5%,which proves that the model has a high precision.

关 键 词：深水钻井 钻头 机械能 井筒温度 生热 摩擦阻力 破岩 

分 类 号：TE52[石油与天然气工程—油气田开发工程]