基于螺杆钻具的近钻头井斜测量误差及修正  

Screwdrill-based Near-bit Deviation MWD Error and Correction

作　　者：刘永旺[1] 管志川[1] 赵国山[2] 史玉才[1] 夏焱 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中石化胜利石油管理局钻井工程技术公司 [3]中国石油集团钻井工程技术研究院

出　　处：《石油机械》2013年第4期1-5,共5页China Petroleum Machinery

基　　金：国家自然科学基金面上项目"基于钻柱的声信号传输系统和声传播特性研究"(50974131);国家高技术研究发展计划(863计划)项目"低压易漏地层钻井关键技术及装备"(2012AA091601);高等学校博士学科点专项科研基金项目"钻柱中声的传播和衰减特性研究"(20090133110005);中国石油大学(华东)研究生创新基金资助项目"基于介质磁化理论的定向井磁测量参数修正方法研究"(BZ10-04)

摘　　要：为了研制具有自主产权的基于现有螺杆钻具的随钻近钻头测量装置,结合井下工况,对近钻头井斜测量过程及仪器本身存在的误差进行了分析,阐述了利用声波或电磁波传输近钻头信号的优势,并提出了近钻头井斜精确测量的误差修正思路。分析结果认为,当前的近钻头井斜测量仪器还存在一些未考虑到的问题,如动力钻具的振动影响测斜精度,动力钻具弯角的存在导致近钻头仪器与井眼不同轴产生误差等。利用声波传输近钻头信息及远程传输井下信息是实现测量的静态及传输信号过程静态的有效方法,建议加快该技术的研究进度,争取早日应用于现场。To develop the near-bit measurement while drilling （MWD） device with independent intellectual property rights, an analysis of the near-bit deviation measurement process and the error with the instrument itself was conducted on the basis of current screwdrill referring to downhole operating conditions. The advantage of using acoustic wave or electromagnetic wave to transmit near-bit signals was expounded. The correction orientation for the error in precise measurement of near-bit deviation was formulated. The analysis shows that some problems with current near-bit deviation measurement instruments have not yet been considered, such as effects of power drill vibration on deviation measurement preciseness, error of the instruments owing to misalignment to the borehole caused by the existence of power drill bend, and so on. Use of acoustic wave to transmit near-bit information and remote transmission of downhole information are the effective methods to achieve the static state of measurement and signal transmission process. It is suggested that the technological research progress should be quickened and its field application should be achieved as soon as possible.

关 键 词：螺杆钻具 近钻头 井斜测量 随钻测量 井眼轨迹 钻具弯角 钻具振动 误差 

分 类 号：TE249[石油与天然气工程—油气井工程]