摘要
随着国内外气体钻井技术的不断发展,以及最大储层接触钻井开发理念的提出,气体钻井技术与水平井等钻井技术相结合在致密低渗油气藏开发方面展现了巨大的潜力。但在气体钻水平井或特殊轨迹井的井眼轨迹测量、井眼轨迹控制技术领域仍然面临一些关键技术难题和挑战。摩阻扭矩就是其中的一项关键技术,摩阻扭矩问题贯穿整个井的设计到钻井再到完井、井下作业全过程。文章提出了一种新的钻柱摩阻扭矩计算解析模型,通过对三维狗腿度的矢量化,以及将重力和张力对摩阻影响的分离,简化了复杂的摩阻扭矩解析模型。并分别对某气体钻井三维拐角井及其复合运动的钻柱摩阻扭矩进行了实例计算。计算结果与经典解析算法进行对比分析,得到该解析模型具有较高的精度,可为油田应用提供简便而可靠的计算方法。
With the development of gas drilling technology at home and abroad,as well as the advance of Maximum Reservoir Contact drilling development,the joint application of gas drilling and horizontal drilling technology showed tremendous potential in the development of tight low permeability oil and gas reservoir.But the trajectory measurement and borehole trajectory control technology in horizontal drilling with gas still faced some key technical problems and challenges.Friction & torque were one of the key technologies.A new analytical model on drill string torque & friction was established.Through the three-dimensional dogleg vector,and the effect analysis of separation of gravity and tension on friction,the complicate analytical model on drill string Torque & friction was simplified.The simplified analytical model was used for calculating the torque & friction of the drill string composite motion in 3D corner well.Compared with classical analytical result,the simplified calculation model had high accuracy,and was suitable for field application.
出处
《钻采工艺》
CAS
北大核心
2013年第6期79-81,6-7,共3页
Drilling & Production Technology
基金
国家科技重大专项课题"低渗气藏复杂地层高效钻井关键技术"(课题编号:2011ZX05022-005)资助
关键词
摩阻扭矩
气体钻井
解析模型
torque and drag,gas drilling,analytic model
