三牙轮钻头破岩过程计算机仿真模型  

Simulation model of drilling process of three-cone bit

作　　者：况雨春[1] 伍开松[1] 杨迎新[1] 马德坤[1] 

机构地区：[1]西南石油大学,成都610500

出　　处：《岩土力学》2009年第S1期235-238,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.50874095);四川省青年科技基金项目(No.07ZQ026-014)

摘　　要：进行钻头钻进过程的仿真对于优化钻头设计、提高破岩效率以及钻头选型都有着重要的应用价值。以现场实钻数据为基础,采用"黑箱法"为钻头钻进岩石互作用仿真模型的基本建模方法,对决定钻头钻进性能的齿坑模型和牙齿吃入岩石的力-吃深模型进行了仿真建模。并采用误差梯度下降算法来估计不同钻头结构和岩石性质所对应的模型参数,进而实现对钻头钻进过程的仿真。采用实钻数据反演的建模思路有利于利用大量的现场数据实现对模型的完善,更好地反映现场的各种钻井工况,使钻头破岩仿真技术在实用性和经济性上前进一大步。The drilling process simulation of bits is important to optimize bit design,to improve efficiency of breaking rock,as well as to bit selection.Based on oil field drilling data,black-box method is used to be a basic modeling method of interaction model between bits and rock.Two important simulation models are built,which determine bit drilling performance,pit model of tooth and force-penetration model of tooth penetrate rock.Parameters of model are estimated by error gradient descent algorithm which includes parameters of bit structure and the rock properties.Then the simulation of bit drilling process is made.The main ideal of modeling by the drilling data is beneficial to use these data to improve the model,and reflects the various drilling conditions better.It also improves the practicability and economical efficiency of simulation technology of bits breaking rock.

关 键 词：三牙轮钻头 钻进过程 反演 仿真模型 参数估计 

分 类 号：TE921.1[石油与天然气工程—石油机械设备]