基于球面波传播理论的钻头趋近邻井防碰预测模型  

Anti-Collision Prediction Model for Drill Bit Approaching Adjacent Well Based on Spherical Wave Propagation Theory

作　　者：何保生 刘华亮[2] 刘刚[2] 杨全枝[2] 耿占力 

机构地区：[1]中海油研究总院,北京100027 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《石油钻探技术》2013年第3期62-66,共5页Petroleum Drilling Techniques

基　　金："十一五"国家科技重大专项"海上油田丛式井网整体加密及综合调整技术"之子课题"定向井防碰地面监测及预警系统研究"(编号:2008ZX05024-004-006);"十二五"国家科技重大专项"海上油田丛式井网整体加密及综合调整技术"之子课题"海上油田丛式井网整体加密调整多平台钻井趋近井筒监测方法研究"(编号:2011ZX05024-002-010)资助

摘　　要：为实现丛式井地面防碰监测预警系统有效预测正钻井与邻井间距离的功能,建立了钻头趋近邻井防碰预测模型。该模型依据弹性波的球面扩散和衰减吸收理论,通过分析实测数据的幅值衰减规律而建立。利用该模型,通过地面实时监测、分析、计算风险邻井套管的振动信号特征,可求取钻头与邻井套管的距离,识别钻头碰撞邻井井筒的可能性并及时预警。根据渤海某油田的防碰监测数据,用所建模型计算出了监测井段钻头与邻井套管的距离;对比测井数据计算的井眼扫描距离和模型计算结果发现,利用该预测模型求解的钻头与邻井间的距离与测井数据得到的井间距离有明确的对应关系,表明所建模型可以作为丛式井地面防碰监测预警系统预测井间距离的一种计算方式。In order to improve the effectiveness of anti-collision system in oItshore cluster well drilling anti-collision prediction model of drill bit approaching adjacent well was built based on the theory of elastic waves in spherical spreading and absorption attenuation, and amplitude attenuation pattern analysis of actu- al measured data. Through adjacent well casing vibration monitoring and data processing, the distance be- tween the drill bit and adjacent well casing can be calculated by using the model,and the chance of well col- lision can be identified and warning provided. The model was used to analyze the casing vibration signals of adjacent wells in Bohai Sea, and gave the distance between dill bit and adjacent well casing. The distance be- tween drill bit and adjacent well casing calculated from the model and well distance from log data matched well. It demonstrated that the model can be used to predict the distance between drilling and adjacent well, which could provide a new technical support for safe drilling of offshore cluster wells.

关 键 词：丛式井 防碰 球面波 钻头 振动波 套管 数学模型 

分 类 号：TE281[石油与天然气工程—油气井工程]